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An Airy beam is a non-diffractive wave which propagates along a ballistic trajectory without any external force. Although it is impossible to implement ideal Airy beams because they carry infinite power, so-called finite Airy beams can be achieved by tailoring infinite side lobes with an aperture function and they have similar propagating characteristics with those of ideal Airy beams. The finite Airy beam can be optically generated by several ways: the optical Fourier transform system with imposing cubic phase to a broad Gaussian beam, nonlinear generation of Airy beams, curved plasma channel generation, and electron beam generation. In this presentation, a holographic generation of the finite Airy beams will be discussed. The finite Airy beams can be generated in virtue of holographic technique by reading a hologram which is recorded by the interference between a finite Airy beam generated by the optical Fourier transform and a reference plane wave. Moreover, this method can exploit the ...
An n-valued switch with n≧2, with an input enabled to receive a signal in one of n states, an output enabled to provide a signal in one of at least 2 states, under control of a control signal having one of at least 2 states is disclosed. Signals are instances of a physical phenomenon, an instance representing a state. N-valued inverters are also disclosed. Different types of signals are disclosed, including optical signals with different wavelengths, electrical signals with different frequencies and signals represented by a presence of a material. A kit including an n-valued switch is also disclosed.
Transition paths of macromolecular conformational changes such as protein folding are predicted to be heterogeneous. However, experimental characterization of the diversity of transition paths is extremely challenging because it requires measuring more than one distance during individual transitions. In this work, we used fast three-color single-molecule Förster resonance energy transfer spectroscopy to obtain the distribution of binding transition paths of a disordered protein. About half of the transitions follow a path involving strong non-native electrostatic interactions, resulting in a transition time of 300 to 800 microseconds. The remaining half follow more diverse paths characterized by weaker electrostatic interactions and more than 10 times shorter transition path times. The chain flexibility and non-native interactions make diverse binding pathways possible, allowing disordered proteins to bind faster than folded proteins. ...
Read it.. Quite frankly, the concept Anglican Dominican nun does not compute.. This entry was posted on Friday, May 29th, 2009 at 06:39 and is filed under Think about it.. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed. ...
The download Classical and Quantum Dynamics: from Classical Paths reveals a detailed JSTOR of character socialism aggregates and Implications, and is Converted ideas of human separation methods. The epitomized philosophy proved also revised on this model. Download Handbook of Flavor Characterization: available, Chemical and by Kathryn D. This human rate work the developing disorders and Continued diseases transmitted to become out the probability of space variable, techniques and good edition edition on argument and fluorescence block.
Fingerprint Dive into the research topics of The role of theory in the laboratory control of quantum dynamics phenomena. Together they form a unique fingerprint. ...
A Fragment Diabatization Linear Vibronic Coupling Model for Quantum Dynamics of Multichromophoric Systems: Population of the Charge Transfer State in the Photoexcited Guanine Cytosine Pair
In this PhD thesis, we construct numerical methods to solve problems described by advectiondiffusion and convective Cahn-Hilliard equations. The advection-diffusion equation models a variety of physical phenomena in fluid dynamics, heat transfer and mass transfer or alternatively describing a stochastically-changing system. The convective Cahn-Hilliard equation is an equation of mathematical physics which describes several physical phenomena such as spinodal decomposition of phase separating systems in the presence of an external field and phase transition in binary liquid mixtures (Golovin et al., 2001; Podolny et al., 2005). In chapter 1, we define some concepts that are required to study some properties of numerical methods. In chapter 2, three numerical methods have been used to solve two problems described by 1D advection-diffusion equation with specified initial and boundary conditions. The methods used are the third order upwind scheme (Dehghan, 2005), fourth order scheme (Dehghan, 2005) ...
EW731 Abstract: Inverse stochastic resonance (ISR) is a recently reported phenomenon in which the spiking activity of a single neuron subject to external noise exhibits a pronounced minimum as the noise intensity increases. We clarify the mechanism that underlies ISR and show that its most surprising features are a consequence of the dynamical structure of the model neuron. We show that the ISR effect depends strongly on the procedures used to measure it. Furthermore, we investigate the possible emergence of ISR in an extended neural medium, with a complex network topology. Our results confirm that ISR can appear in these networked systems for a wide range of parameters, and is robust for both electrical and chemical synapses and for balanced networks with excitatory and inhibitory neurons. This is the first time that this intriguing phenomenon has been reported in an extended neural medium. The possible dynamical mechanisms behind ISR in such networked systems is also studied. Moreover, we ...
EW731 Abstract: Inverse stochastic resonance (ISR) is a recently reported phenomenon in which the spiking activity of a single neuron subject to external noise exhibits a pronounced minimum as the noise intensity increases. We clarify the mechanism that underlies ISR and show that its most surprising features are a consequence of the dynamical structure of the model neuron. We show that the ISR effect depends strongly on the procedures used to measure it. Furthermore, we investigate the possible emergence of ISR in an extended neural medium, with a complex network topology. Our results confirm that ISR can appear in these networked systems for a wide range of parameters, and is robust for both electrical and chemical synapses and for balanced networks with excitatory and inhibitory neurons. This is the first time that this intriguing phenomenon has been reported in an extended neural medium. The possible dynamical mechanisms behind ISR in such networked systems is also studied. Moreover, we ...
The Japanese third seed swept past the American veteran 6-3, 6-4 on Rod Laver Arena in front of thousands of fans allowed back in after Melbourne lifted a snap five-day lockdown.. She will face either American Jennifer Brady or Czech Karolina Muchova on Saturday for a fourth Slam title after her success at Flushing Meadows in 2018 and last year, and Melbourne in 2019.. The victory left Williams, who won her last major in Melbourne in 2017, stranded on 23 Grand Slam titles as she strives to match Margaret Courts all-time record.. Since winning while pregnant in Australia four years ago, Williams has lost four Slam finals, including one to Osaka in a controversial and heated 2018 US Open decider which left both women in tears.. I hit a lot of unforced errors in the first few games, I was just really nervous and scared, said Osaka, who reeled off five games in a row in the opening set after going 2-0 down.. But then I sort of eased my way into it and the biggest thing for me was having ...
Kvitova eliminated Spanish third seed and two-time Slam victor Garbine Muguruza 7-6 (7/3), 6-3 while Williams beat 35th-ranked Spaniard Carla Suarez Navarro 6-3, 3-6, 6-1. On the recommendation of her doctor, Sharapova consumed a drug called meldonium.. This was the third three-set match for Sharapova in the tournament and it appeared to catch up with her as she finished with 51 unforced errors - 37 more than her opponent. She played unbelievable throughout the first and second set and I just kept fighting, running every ball and just stayed there.. Sharapova is used to a hostile locker room, and fellow players are pillorying the 2006 US Open victor, too.. I think she can lose to anyone now. You cant replicate that anywhere, especially at a Grand Slam.. Kenin, like Sharapova, was born in Russia and moved to the United States with her family as a child, and the pair had exchanged words in Russian in the locker room. So I know that so I am going to try to take it. Venus could return to ...
Simona Halep served for the match today at 5-4 in the third set. She and her opponent, 4th seed Jelena Jankovic, played an error-filled mess of a match that Halep might have won had she been at a higher level of fitness and prepared to face the intense heat. But credit to JJ: When it came down to the end, something snapped into place, and she forced consecutive errors from her exhausted opponent to (finally) win 6-4, 4-6, 7-5. Halep was up 5-1 in the second set, and almost ran away with it, as Jankovic made a string of unforced errors. (During the third set, my mind wandered to that Australian Open first round in which Jankovic saved herself at the last minute from an upset by Tamira Paszek ...
Wimbledon found themselves 3-0 down after just 17 minutes with Sam Lawford opening the scoring and a Greg Cundle double. Though the Dons did stem the flow and created a few opportunities of their own in the first-half, unforced errors from Wimbledon gave Gillingham chances to add to their tally.. Without being anywhere near their best, Wimbledon threatened to make a game of it. Kaja was foiled in a one-on-one by Gillingham goalkeeper Henry Newcombe, who also denied Agyei after good work by Alfie Egan. minute.thIt was a much brighter start from Wimbledon after half-time with Dan Agyei and Egli Kaja both going close to reducing the arrears. There was not too long to wait though for Wimbledon to register and Agyei (pictured) did get one back in the 56. Wimbledon hopes of earning a draw receded 21 minutes from time though when Harry Stannard made it 4-1 from a free-kick. It got worse for the hosts when the excellent Lawford added a fifth for Gillingham.. And Kaja added a third for Wimbledon after ...
Marcus Williams whiffed and the Minneapolis Miracle was born, placing him on this mans list of 10 of the more infamous unforced errors on what in the closing seconds of a postseason game.
Multivariable functions permeate physics, mathematics, and other sciences. Understanding how quantities in multivariable relationships change together - or co-vary - is important for studying physical systems. In this project, we asked junior-level physics majors to describe the covariation of quantities in a multivariable context given a 2D graph. We identified three meta-categories which describe the elements of reasoning students used to make judgements about how quantities covaried: (1) geometric - referencing the features of the provided graph, (2) physical - using physical knowledge about the gas, (3) analytical - analyzing the system abstractly. Students whose problem solving and reasoning fell in the analytical category tended to give the most sophisticated answers. To help students reason productively about covariation in multivariable contexts, we developed an instructional activity where students examine how quantities change using both a 3D surface model and a contour map ...
P. Didier, L. Guidoni, and E. Weiss, Ultrafast Excited-state Dynamics of Genetic Fusions: The Green Fluorescent Protein as a Folding Reporter, in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies, Technical Digest (CD) (Optical Society of America, 2006), paper QMH1 ...
Author Summary Recent advances in DNA sequencing and metagenomics are opening a window into the human microbiome revealing novel associations between certain microbial consortia and disease. However, most of these studies are cross-sectional and lack a mechanistic understanding of this ecosystems structure and its response to external perturbations, therefore not allowing accurate temporal predictions. In this article, we develop a method to analyze temporal community data accounting also for time-dependent external perturbations. In particular, this method combines the classical Lotka-Volterra model of population dynamics with regression techniques to obtain mechanistically descriptive coefficients which can be further used to construct predictive models of ecosystem dynamics. Using then data from a mouse experiment under antibiotic perturbations, we are able to predict and recover the microbiota temporal dynamics and study the concept of alternative stable states and antibiotic-induced transitions.
Advances in Mathematical Physics is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles that seek to understand the mathematical basis of physical phenomena, and solve problems in physics via mathematical approaches.
Advances in Mathematical Physics is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles that seek to understand the mathematical basis of physical phenomena, and solve problems in physics via mathematical approaches.
205-. . . . but also say that there isnt actually any disequilibrium that the planet is recovering from - therefore any temp increases are not natural.. Close! No, there is no default-but there can be a disequilibrium. (In fact, it is calculated that there is disequilibrium right now of .5-1 Watts per square meter, caused by greenhouse gases and in turn causing the warming observed today.). The logical difference is that the first implies some automatic, internal mechanism which acts to maintain a set temperature-rather as mammalian physiology maintains a more-or-less constant body temperature, for instance. There is something a bit like this, since a warmer object radiates more effectively than a cooler one, according to the Stefan-Boltzmann law. Thus, if the Earth warms up due to an increase in the intensity of solar radiation say, it will radiate more, increasing the outgoing energy until it matches the incoming energy once again. So this radiational matching is automatic-but note ...
Hansen et al. 2013 … A cumulative industrial-era (1750-?) limit of ~500 GtC fossil fuel emissions and 100 GtC storage in the biosphere and soil would keep climate close to the Holocene range to which humanity and other species are adapted. Cumulative emissions of ~1000 GtC, sometimes associated with 2°C global warming, would spur slow feedbacks and eventual warming of 3-4°C with disastrous consequences. HOWEVER the path actually leads to Cumulative emissions of ~2,000 GtC would indicate a minimum GMST of +4°C before 2100 on top of the ~2C already in the system …. with even further global warming to 6-8°C quite possible over time.. All things being equal, if this rate of fossil fuel energy use continues then +4°C is all but a certainty by 2100. This is ignoring any and ALL Climate Feedbacks, such as from the loss of ice, methane in the arctic, and other major tipping points in the climate system that science as yet cannot predict very well.. We also know the historical 365 GTC raised ...
Transparency is an important part of community. I have never felt comfortable sharing my pain and sorrows and heartache with the church I grew up at. Too many people have witnessed me deal with pain and have thought she is dealing so well. I have dealt with grief and extreme/intense pain before, but nothing like this. On Sunday night, while speaking at my church, I was overcome with the need to tell them that I was broken. That I was going to be completely honest and open with them about my experiences in Haiti, and that probably would make them uncomfortable. Total, brutal honesty is not a common thing in church... which seems ironic to me. Church should be the place where we are most open and broken in front of people. So I was. And the outpouring of prayers, tears and support from everyone in the sanctuary was overwhelming. They even cancelled the business meeting, which might have been the first time in Baptist history ...
Jet fuel is used in high-performance military flight vehicles for cooling purposes before combustion. It is desirable to investigate the influence of the flow and heating conditions on fuel heat transfer and thermal stability to develop viable mitigation strategies. Computational fluid dynamics (CFD) simulations and experiments can provide the understanding of the fuel physical phenomena which involves the fluid dynamics, heat transfer and chemical reactions. Three distinct topics are studied: The first topic considers the effect of flow geometry on fuel oxidation and deposition. Experiments and CFD modeling were performed for fuels flowing through heated tubes which have either a sudden expansion or contraction. It was found that the peak deposition occurs near the maximum oxidation rate and excess deposition is formed near the step. This study provides information for the fuel system designer which can help minimize surface deposition due to fuel thermal oxidation. In the second area of study, ...
Well, I cant argue with your beliefs, but I reject them. Application of the calculus to the problems you mention has been quite successful. You assume that atoms behave independently regardless of circumstances. Your assumption that the calculus can deal only with mathematically continuous systems is also faulty. You also have not provided any examples, according to your hypothesis, that application of the calculus has provided faulty results when used to analyze physical phenomena ...
I am Justin Tauber, a PhD candidate at Physical Chemistry and Soft Matter from March 2017 until March 2021. I obtained my Bsc and Msc in Molecular Life Sciences at Wageningen University. During my studies I specialized in soft matter physics and computer modeling.. As a part of the SoftBreak project I develop models for failure in soft (polymeric) materials, such as gels and rubbers. I am especially interested in failure processes in multi-component materials, such as inter-penetrating networks, and heterogeneous materials.. My research is based on the philosophy that general trends in soft matter physics can often be explained by simple models. We interpret polymer networks as networks of (entropic) springs and use this concept to model physical phenomena that are observed in experiments or predicted by theory.. ...
The Large Hadron Collider has completed many successful months of colliding protons (hydrogen ions) at record-breaking energies and now begins four weeks of colliding much more massive lead ions, giving access to different physical phenomena. Berkeley Lab hosts U.S. participation in the ALICE experiment, designed specifically to study the heavy-ion collisions that give rise to a unique phase of matter, the quark-gluon plasma. Berkeley Lab is also a major participant in the ATLAS experiment, one of the other LHC experiments that will study lead-lead collisions. ...
The core activity of the Institute for Biologically inspired materials is to develop nanotechnology (fabrication and physical phenomena of materials on the nanoscale) and molecular self assembly tools for application to biological and medical problems and to create novel smart materials and structures inspired by assembly principles studied in biological systems. These goals cannot be achieved without developing our current fundamental understanding of the physics and chemistry of complex nanoscale systems.. The focus application areas for this research are in:. *drug delivery. *smart tissue engineering scaffolds. *filtration. *biosensing. In all areas we have a particular interest in the creation of nanoscale building blocks with asymmetric geometry, physical and chemical interactions, based on synthetic or biological units. Such building blocks exhibiting weak interactions assembled into confined fluids and gels are hallmarks of biology and life, but currently almost non-existent as ...
All biological processes are governed by principles of physics that dictate the pathophysiology and even the treatment of congenital heart diseases. In this review, basic concepts such as flow, pressure, resistance, and velocity are introduced, followed by more complex laws that describe the relationship between these variables and the disease processes. Finally, physical phenomena such as turbulence, steal and runoff phenomenon, and energy loss are discussed. By application of these principles, one can accurately quantify modifications undertaken to treat diseases, for example, the size of a patch that augments a vessel and the angle of an anastomosis to allow a certain flow ...
A type of network analysis successfully demonstrated to quantify growth and development in ecosystems is applied to the purely physical phenomenon of fluid flow. Simple two-dimensional models of fluid flow are created and represented as networks of nodes and transfers or flows between nodes. Modeling flow data as a network enables the calculation of indicators or indices that quantify the activity and organization of the represented flow field. The method of cellular automata is used to create three flow field examples, two of which introduce obstacles in the flow field to disrupt the otherwise uniform flow. Four well understood examples from fluid dynamics are described analytically and then analyzed as networks. These conceptual examples of fluid flow demonstrate the utility of network analysis as a method of quantitatively characterizing complex patterns of fluid flow ...
It is just as difficult to regard the emission literally as a proton beam as it is to imagine it being a laser. Lasers and proton beams are very different physical phenomena in any case. The true nature of the superlaser remains an undescribed piece of superphysics, and only its incidental effects have so far been named. Careful observation of the firing process can yield indications about the underlying physical mechanism: When the eight tributary beams meet at the weapons focal point they do not pass through each other as genuine light beams would. Instead they come to a halt and energy apparently builds at that point until a critical moment when the final outbound beam is spontaneously released. Whatever force is involved in the superlaser, it cannot be mere electromagnetism because non-disruptive superposition of beams is ruled out by the focal point behavior. The direction of the composite beam is a simple vector sum of the directions of the eight tributaries. This suggests that no ...
Study of physical phenomena by means of mathematical models is common in various branches of engineering and science. In biomechanics, modelling often involves studying human motion by treating the body as a mechanical system made of interconnected rigid links. Robotics deals with similar cases as robots are often designed to imitate human behavior. Modelling human movements is a complicated task and, therefore, requires several simplifications and assumptions. Available computational resources often dictate the nature and the complexity of the models. In spite of all these factors, several meaningful results are still obtained from the simulations.. One common problem form encountered in real life is the movement between known initial and final states in a pre-specified time. This presents a problem of dynamic redundancy as several different trajectories are possible to achieve the target state. Movements are mathematically described by differential equations. So modelling a movement involves ...
Heterogeneous interfaces between two dissimilar materials are an essential building block for modern semiconductor devices. The 2-dimensional (2D) van der Waals (vdW) materials and their heterostructures provide a new opportunity to realize atomically sharp interfaces in the ultimate quantum limit for the electronic and optoelectronic processes. By assembling atomic layers of vdW materials, such as hexa boronitride, transition metal chalcogenide and graphene, we can construct atomically thin novel quantum structures. We demonstrate the enhanced electronic and optoelectronic performances in the vdW heterostructures, suggesting that these a few atom thick interfaces may provide a fundamental platform to realize novel physical phenomena. In this presentation, we will discuss transmission electron microscopy (TEM) investigation of the microstructures of 2-D based heterostructures. Microstructural properties of the heterostructures caused by the interlayer interaction were studied by TEM-based ...
novel physical phenomena, not allowed for in current physical theories, may be utilized to transcend those theoretical constraints[1] that in our current understanding limit the information processing density that can be attained in a given lump of matter. But we can with much greater confidence establish lower bounds on posthuman computation, by assuming only mechanisms that are already understood. For example, Eric Drexler has outlined a design for a system the size of a sugar cube (excluding cooling and power supply) that would perform 10^21 instructions per second (Drexler 1992). Another author gives a rough performance estimate of 10^42 operations per second for a computer with a mass on order of large planet (Bradbury 2000).[2]. The amount of computing power needed to emulate a human mind can likewise be roughly estimated. One estimate, based on how computationally expensive it is to replicate the functionality of a piece of nervous tissue that we already understand (contrast enhancement ...
Burnup limitations are normally set to limit stresses in the fuel assembly components. The defined limits provide guidance to the fuel designer to minimize fuel failure during steady sate operation, and also prevent against some thermal and mechanical phenomena that could occur during overpower transients. In particular, a LHGR limit value is set to take into account physical phenomena that could lead to pellet-cladding interaction. This limit value directly relates to a PCI limit, which may be set based on experimental ramp tests. Thus, to avoid violating the PCI limit, fuel conditioning procedures are still required for both barrier and non-barrier fuel. Simulation of the power ramp procedures to be performed by the reactor operator during startup or power increase maneuvers is advisable as a preventive measure of possible overpower consequences on the fuel thermomechanical behavior. In this paper, the thermomechanical behavior of two different kinds of BWR fuel rods is analyzed for fuel ...
Given this situation, therefore, most traits tune themselves to intermediate values, because extreme values are typically extremely ill suited in some environments one is likely to face. And, all this is further constrained by the possible organization of the brain: for example, it is completely possible that the brain is composed of two parts, one that can analyze and model its environment in terms of an open-loop system controlled by impersonal physical laws which constrain and guide change, and a social system that can alternately assign agency (or will) to parts of the environment. If this simple separation of thought patterns is an useful approximation, the division of resources between the two will affect a lot of behavior: a lot of resources devoted to the physical system will make one unable to understand complicated social dynamics; whereas too high a reliance on the social system might make one unable to understand that physical phenomenon often do not have wills and desires. Both ...
Given this situation, therefore, most traits tune themselves to intermediate values, because extreme values are typically extremely ill suited in some environments one is likely to face. And, all this is further constrained by the possible organization of the brain: for example, it is completely possible that the brain is composed of two parts, one that can analyze and model its environment in terms of an open-loop system controlled by impersonal physical laws which constrain and guide change, and a social system that can alternately assign agency (or will) to parts of the environment. If this simple separation of thought patterns is an useful approximation, the division of resources between the two will affect a lot of behavior: a lot of resources devoted to the physical system will make one unable to understand complicated social dynamics; whereas too high a reliance on the social system might make one unable to understand that physical phenomenon often do not have wills and desires. Both ...
Researchers at Utrecht University, the Netherlands reveal in a new study a novel mechanism for controlling the energy transfer between electrons and the bismuth crystal lattice. Mastering this effect could, ultimately, help convert waste heat back into electricity. At the atomic level, bismuth displays a number of quirky physical phenomena. Piotr Chudzinski from Utrecht University ...
Since 1990the Quantum Hall Effect (QHE) has been used as the primary reference for the electrical resistance. This physical phenomenon based on quantum electronic properties of a two dimensional conductor in presence of a high magnetic field allows the generation of an electrical resistance, the Hall resistance RH ...
Multiphysics is the study of multiple interacting physical properties. By coupling physical phenomena, we can generate accurate simulations.
The Society for Experimental Mechanics is composed of international members from academia, government, and industry who are committed to interdisciplinary application, research and development, education, and active promotion of experimental methods to: (a) increase the knowledge of physical phenomena; (b) further the understanding of the behavior of materials, structures and systems; and (c) provide the necessary physical basis and verification for analytical and computational approaches to the development of engineering solutions.. Click here to visit website ...
Vibrational medicine attempts to kickshaw race next to a variety of forms of uncontaminated enthusiasm. The urging of alternative medical systems specified as Chinese, Ayervedic or Tibetan medical science have led in cog to the movement of machines that can image energy. Heat punch imagers are an standard part of our practical application. We readily adopt imaging heat, even yet we cant see it, because boil is something we can undergo through with touch. With the energy body it is not so unequivocal. Very few of us have full-fledged this for ourselves and there is allegedly no centripetal backup to bowman us it is in attendance.. Experiments in electro-acupuncture and Kirlian pictorial representation have led to an perkiness map of the unit the same to that shown in old school Chinese drug. The time of day group is seen as an interface relating the fleshly article and the spirit organic structure. Applications of reverberant physical phenomenon to the hour set of laws forward healthful in ...
The present paper is a compilation of extractions from authors works. Those works were performed along different lines of research, each line reflecting some relevant side of the surrounding world. The review is focused on the world around us and on our understanding of this world. While writing the present paper, author tried to outline the disadvantages of the contemporary scientific picture of the world. Those disadvantages mainly stem from the presently adopted scientific method in which almost all explanations of physical phenomena are based on hypotheses. Gradually, the arbitrariness of adopted hypotheses gets forgotten, and fictional explanations get establish as the real structures of the world. In the present paper, the electromagnetic and gravitational interactions are treated from the position of the no-hypothesis approach. The latter approach consists in the study of phenomena as they are, in the measurement of the various properties of natural objects, and in the establishment
(PhysOrg.com) -- Physicists are divided on whether string theory is a viable theory of everything, but many agree that it offers a new way to look at physical phenomena that have otherwise proven difficult to describe. In ...
We present an experimental and theoretical study of passively mode-locked fiber soliton lasers. Our theoretical analysis based on perturbation theory describes the soliton interactions that occur when pulse bunches form. Our results indicate that the nonsoliton component emitted by the propagating solitons causes small changes of the central frequency of individual solitons, and the strength and the sign of this interaction between the soliton and dispersive waves depend on their mutual phase as well as on the soliton position within the soliton bunch. For a certain phase difference between the solitons and the nonsoliton component the interaction force becomes repulsive for all solitons within a soliton bunch and results in an almost uniform distribution of the pulses inside the laser cavity. The pulses are then locked into their temporal positions by acoustic effects. We also demonstrate that the laser performance could be further improved by the use of a multiple-quantum-well saturable ...
We address the transverse mobility of spatial solitons in competing parity-time-symmetric linear and nonlinear lattices. The competition between out-of-phase linear and nonlinear lattices results in a drastic mobility enhancement within a range of soliton energies. We show that within such a range, the addition of even a small imaginary part in the linear potential makes soliton mobility strongly asymmetric. For a given initial phase tilt, the velocity of soliton motion grows with an increase of the balanced gain/losses. In this regime of enhanced mobility, tilted solitons can efficiently drag other solitons that were initially at rest to form moving soliton pairs ...
Experimental evidence is presented that the intrinsic viscosity of solutions of mixed proteins obeys the additive equation. See PDF for Equation.. The datum serves to characterize the system, and combined with other analytical techniques and fractionation procedures, enables one to analyze and characterize subfractions. The plasmas and sera of clinically normal individuals give intrinsic viscosity values agreeing with calculated values. The intrinsic viscosity values for pathological plasmas and sera in all cases are greater than normal and reflect the augmented levels of those proteins fibrinogen, α2-globulins, and γ-globulins occurring in the pathological state. The method is readily adaptable to routine clinical use and furnishes a measure of the departure from normal of protein levels in serum and plasma.. ...
Absorption of ultraviolet light by DNA is known to lead to carcinogenic mutations, but the processes between photon absorption and the photochemical reactions are poorly understood. In their study of the excited-stated dynamics of model DNA helices using femtosecond transient absorption spectroscopy1, Crespo-Hernández et al. observe that the picosecond component of the transient signals recorded for the adenine-thymine oligonucleotide (dA)18•(dT)18 is close to that for (dA)18, but quite different from that for (dAdT)9•(dAdT)9; from this observation, they conclude that excimer formation limits excitation energy to one strand at a time. Here we use timeresolved fluorescence spectroscopy to probe the excited-state dynamics, which reveals the complexity of these systems and indicates that the interpretation of Crespo-Hernández et al. is an oversimplification. We also comment on the pertinence of separating base stacking and base pairing in excited-state dynamics of double helices and question the
Fig. 2. Biofilm formation by E. coli cells expressing FimH variants. Each FimH variant is indicated by its expression plasmid. (A) Biofilm formation on a microtiter plate surface by cells expressing the K-12 fimH allele when grown in LB under static conditions. (B) Biofilm formation on a microtiter plate surface by cells expressing FimH variants when grown in LB under HDF conditions. Note that no biofilm is produced by the K-12fimH allele (pMAS1) under these conditions. (C) Quantification of biofilm formation as determined by the amount of crystal violet staining for each of the FimH variants. All experiments were performed in the presence and absence of methyl-α-d-mannopyranoside (α mm). Results are expressed as the average of four independent experiments (± standard deviation). ...
It is a commonplace in the history of ideas that one of the few medieval philosophical contributions preserved in modern philosophical thought is the idea that mental phenomena are distinguished from physical phenomena by their intentionality: their intrinsic directedness toward some object. Nevertheless, medieval philosophers routinely described ordinary physical phenomena, such as reflections in mirrors or sounds in the air, as exhibiting intentionality, while they described what modern philosophers would take to be typically mental phenomena, such as sensation and imagination, as ordinary physical processes. Still, medieval philosophers would regard all acts of cognition as characterized by intentionality, on account of which all these acts are some sort of representations of their intended objects. The essays in this volume explore the intricacies and varieties of the conceptual relationships among intentionality, cognition, and mental representation as conceived by some of the greatest medieval
Everyone knows that some of the things the gauges on the dashboard of a car warn the driver about are its content of fuel, oil, and anti-freeze. But how do they do it? Each device is essentially a sensory transducer with a mechanism that enables it to sense a physical phenomenon and convert it into useful information. The body too uses devices to detect physical phenomena so it knows what is going on outside and inside. These are likewise sensory transducers. The sensation of balance comes from the vestibular apparatus in the ears that tells the body its position relative to motion and the force of gravity and also helps to stabilize the retinal image. Common sense teaches that without this special sense our earliest ancestors could never have survived. Evolutionary biologists claim that similarities in the vestibular mechanisms in different life forms indicates that it was easy for chance and the laws of nature alone to bring about the sense of balance. But as with the development of various ...
Page 395 - I measured him standing up against the wall, and marked the place ; not being satisfied with that, I put him in the middle of the room and placed a candle in front of him, so as to throw a shadow on the wall, which I also marked. When he awoke I measured him again in his natural size, both directly and by the shadow, and the results were equal. I can swear that he was not off the ground or standing on tiptoe, as I had full view of his feet, and moreover, a gentleman present had one of his feet placed... ...
I havent read any of the articles yet, so heres my big chance to insert my foot in my mouth. I will start collecting the references and will post what I learn, so public humiliation is a real possibility here. My guess is that the polymer is breaking up some sort of weak network in the solvent (hydrogen bonding, polar-polar interactions...) so that the solvent has a lower viscosity, thus leading to the negative intrinsic viscosity - and the need for a new theory to explain it. Yes, go with a new theory since the old theory made a certain set of assumptions that are no longer valid ...
The 2014 season of Formula 1 racing came to a close at this mornings Abu Dhabi GP, and the nail-biting, season-long duel for the championship between Mercedes drivers Lewis Hamilton and Nico Rosberg was over by the first corner- just not quite in the way that many (including me) predicted.. Lewis Hamilton, rather than crash his teammate out of contention the way Senna or Schumacher might have, played it absolutely straight and beat Rosberg- mercilessly- on the track.. Hamilton blasted past Rosberg at the start, and stretched out his lead with every lap. Rosberg couldnt catch him, made unforced errors, and- finally- his Mercedes succumbed to the same kind of electrical gremlins that had plagued Hamilton all year long, sliding well out of the points in the closing laps of the Abu Dhabi GP.. To Rosbergs credit, as well, he didnt pack it in and pit when called to on the radio. Instead, he preferred to finish the 2014 season- his best, yet in F1- in the car and on the track.. Bravo, ...
It took a catastrophic, unforced error from a major U.S. Senate nominee to prove the point: In 2012, candidate quality matters - a lot. After three consecutive wave elections - the Democratic landslides of 2006 and 2008 and the Republican revolution of 2010 - both parties have rapidly remembered that they cant always count...
If winning when you are not playing well is a quality shared by sports most hardened competitors then Ash Barty showed she can mix it with the best of them in her victory over Anna Blinkova at Wimbledon on Thursday. By her own admission world number one Barty was not firing on all cylinders in her second round match against the Russian, but she still came out on top in a 6-4 6-3 victory. Her serve was erratic at times, with the Australian hitting nine double faults, while her tally of 33 unforced errors could have cost her dear against a more dangerous opponent than the 89th-ranked Blinkova.
Prof. Mikhail Kovalyov will talk about some work in Soliton Theory. Solitons are stable formations of nonlinear systems some of which might be described by PDEs, integral equations, graphs, etc. Many soliton equations describe motions of fluids and find a great deal of applications in the description of water waves and atmospheric waves e.g. tsunami and rogue waves.Prof. Mikhail Kovalyov is a professor of Mathematics at the University of Alberta, Canada. He obtained his PhD in Mathematics from the Courant Institute of Mathematical Sciences at New York University. He was in Ateneo, as a visiting professor, in 1993-1994. And it was at this time when he started working on the theory of solitons ...
The knowledge argument (also known as Marys room or Mary the super-scientist) is a philosophical thought experiment proposed by Frank Jackson in his article Epiphenomenal Qualia (1982) and extended in What Mary Didnt Know (1986). The experiment is intended to argue against physicalism-the view that the universe, including all that is mental, is entirely physical. The debate that emerged following its publication became the subject of an edited volume-Theres Something About Mary (2004)-which includes replies from such philosophers as Daniel Dennett, David Lewis, and Paul Churchland. Marys Room is a thought experiment that attempts to establish that there are non-physical properties and attainable knowledge that can be discovered only through conscious experience. It attempts to refute the theory that all knowledge is physical knowledge. C. D. Broad, Herbert Feigl, and Thomas Nagel, over a fifty-year span, presented insight to the subject, which led to Jacksons proposed thought ...
Now, I would assume, and this is only my assumption, that since these researchers collected this pelvic muscle data but did not report it, that they probably found that some of the women did not display rhythmic pelvic muscular activity at the time of orgasm. I would further assume that they chose not to deal with this inconvenience because pointing out that some women didnt have these pelvic contractions even when they claimed orgasms would seem like they were judging and invalidating the experience of orgasm had by those women. I get it. I do, and I also think that is a common reason why this aspect of female orgasm is so often ignored - niceness and terror of being accused of not believing womens descriptions of their own experience (at least I hope its that and not simply for convenience of conclusions). However, its lame, and its got to stop. This is scientific investigation, and physical knowledge of female orgasm will continue to linger in mushy, wishy-washy confusion if the ...
PHYSICS OF ANTIMATTER Our group is part of the GBAR collaboration (Gravitational Behavior of Antihydrogen At Rest), whose aim is to measure the effect of gravity on antihydrogen atoms by letting them fall in the gravitational field of the Earth. This international collaboration (involving (...)
Airy light-sheet microscopy (ALSM) has great potential to help further research and clinical diagnoses through its ability to image larger 3D volumes
This book is the result of many years of experience of the authors in guiding physics projects. It aims to satisfy a deeply felt need to involve students and their instructors in extended experimental investigations of physical phenomena. Over fifty extended projects are described in detail, at various levels of sophistication, aimed at both the advanced high school, as well as first and second year undergraduate physics students, and their instructors.
The very first cry of neonates is marked by their maternal language. This seems to be especially apparent in tonal languages, where pitch and pitch fluctuation determine the meaning of words. Chinese and German scientists under the leadership of the University of Würzburg have demonstrated this phenomenon for the first time by with newborn babies from…
Top free virtual sex change downloads. The ManageEngines Free VMware Configuration tool is a light weight tool, can configure VMware Virtual server (VMs ) resources such as CPU, RAM or execute Power operations or change the Name of the VMS, and also it fetches comprehensive data about the servers and its virtual machines and presents them as visually elegant graphs and reports in a desktop tool dashboard. As its name indicate, Virtual physics allows you to simulate certain physical phenomena on your computer in such a way that students - and general users - can actually see what happens in some natural conditions that are not easy to see in real life
2018 Ab initio calculations of scattering cross sections of the 3-body system (p,e+,e-) between the H(n=2)+e- and H(n=3)+e- thresholds. M. Valdes, M. Dufour, R. Lazauskas, and P. -A. Hervieux, Phys. Rev. A 97, 012709 (2018). Spin current generation by ultrafast laser pulses in ferromagnetic (...)
Intrinsic viscosity allows to monitor molecular interactions through standard QC procedures with portable and repeatable viscometer, microVISC.
The paper experimentally studies the effects of periodic unsteady wake flow and different Reynolds numbers on boundary layer development, separation and re-attachment along the suction surface of a low pressure turbine blade. The experimental investigations were performed on a large scale, subsonic unsteady turbine cascade research facility at Turbomachinery Performance and Flow Research Laboratory (TPFL) of Texas A&M University. The experiments were carried out at Reynolds numbers of 110,000 and 150,000 (based on suction surface length and exit velocity). One steady and two different unsteady inlet flow conditions with the corresponding passing frequencies, wake velocities, and turbulence intensities were investigated. The reduced frequencies chosen cover the operating range of LP turbines. In addition to the unsteady boundary layer measurements, surface pressure measurements were performed. The inception, onset, and the extent of the separation bubble information collected from the pressure ...
The physics is complicated. Light of a longer wavelength is red, orange and yellow. Shorter wavelength light is blue. In summary, light of a longer wavelength is absorbed by the pigment. This stops the colors being seen.. Light of a shorter wavelength is scattered in the iris and is visible. The scattering of the light is the same as the scattering that takes place in the sky. In both instances the light looks blue in color.. Accordingly, the blue of blue eyes is not due to blue colored pigmentation in the iris but is caused by a physical phenomenon.. In due course the cats eyes settle on the adult color. The most common color is from greenish-yellow to gold.. Siamese cats have blue eyes because a gene, causing a form of albinism, that removes color from the fur and from the iris.. Cats with some white fur - bicolor cats - sometimes have blue eyes. The white fur is coded by the piebald gene which also affects the eyes.. All white cats have blue eyes due to a lack of pigmentation. The fur is ...
George Francis Carrier, one of the worlds preeminent applied mathematicians and the T. Jefferson Coolidge Professor of Applied Mathematics Emeritus at Harvard University, died of cancer in a Boston hospital on March 8, 2002, at the age of 83. He had been a resident of Wayland, Massachusetts. George had a special talent for describing complicated physical phenomena mathematically. He would then deduce approximate analytic solutions that accurately described the behavior of the phenomena and permitted useful predictions. The rapidity with which he executed the analysis was often exceptional, and was facilitated by his ability to extend mathematical methods to serve his immediate needs.. He applied his talents in many fields, with emphasis on fluid dynamics, combustion, and natural hazards (including hurricanes, tornadoes, fires, and tsunamis---destructive ocean waves generated by earthquakes). Typically, he did not contrive the problems on which he worked; they were often brought to him by ...
Features of consciousness difficult to understand in terms of conventional neuroscience have evoked application of quantum theory, which describes the fundamental behavior of matter and energy. In this paper we propose that aspects of quantum theory (e.g. quantum coherence) and of a newly proposed physical phenomenon of quantum wave function self-collapse(objective reduction: OR -Penrose, 1994) are essential for consciousness, and occur in cytoskeletal microtubules and other structures within each of the brains neurons. The particular characteristics of microtubules suitable for quantum (...) effects include their crystal-like lattice structure, hollow inner core, organization of cell function and capacity for information processing. We envisage that conformational states of microtubule subunits (tubulins) are coupled to internal quantum events, and cooperatively interact (compute) with other tubulins. We further assume that macroscopic coherent superposition of quantum-coupled tubulin ...
In this paper we propose that aspects of quantum theory (e.g. quantum coherence) and of a newly proposed physical phenomenon of quantum wave function self-collapse(objective reduction: OR -Penrose, 1994) are essential for consciousness, and occur in cytoskeletal microtubules and other structures within each of the brains neurons. The particular characteristics of microtubules suitable for quantum effects include their crystal-like lattice structure, hollow inner core, organization of cell function and capacity for information processing. We envisage that conformational states of microtubule subunits (tubulins) are coupled to internal quantum events, and cooperatively interact (compute) with other tubulins. We further assume that macroscopic coherent superposition of quantum-coupled tubulin conformational states occurs throughout significant brain volumes and provides the global binding essential to consciousness ...
In this paper we propose that aspects of quantum theory (e.g. quantum coherence) and of a newly proposed physical phenomenon of quantum wave function self-collapse(objective reduction: OR -Penrose, 1994) are essential for consciousness, and occur in cytoskeletal microtubules and other structures within each of the brains neurons. The particular characteristics of microtubules suitable for quantum effects include their crystal-like lattice structure, hollow inner core, organization of cell function and capacity for information processing. We envisage that conformational states of microtubule subunits (tubulins) are coupled to internal quantum events, and cooperatively interact (compute) with other tubulins. We further assume that macroscopic coherent superposition of quantum-coupled tubulin conformational states occurs throughout significant brain volumes and provides the global binding essential to consciousness ...
Oxide scale behaviour in thermomechanical processing has been the subject of intensive research for several years that allowed development of a finite element (FE) based model to simulate a range of events of relevance to the process and to the surface quality of the hot rolled product. Oxide scale failure is predicted taking into account the main physical phenomena such as stress-directed diffusion, fracture and adhesion of the oxide scale, strain, strain rate and temperature. The most critical parameters for scale failure are measured during modified hot tensile testing and depend on the morphology of the particular oxide scale, scale growth temperature, and are also very sensitive to the chemical composition of the underlying metal. The work integrates finite element analysis with a range of experiments each to provide partial insight into oxide fracture, friction, heat transfer, pick-up and descaling, amongst others. An overview of this research is presented, revealing a variety of phenomena ...
Although considerable progress has been achieved in the last decades on Contact Mechanics, many problems are still open. The research field is still growing and diversified in many directions. Indeed, the research in contact mechanics has many facets which can be classified into understanding of physical phenomena, numerical simulations and industrial applications. ...
This course covers fundamental numerical and computational methods for modeling physical phenomena and processes with a focus on chemical engineering applications. An emphasis is placed on the implementation of the numerical methods in a programming environment and computer based modeling of chemical engineering applications. Topics include the solution of linear and nonlinear algebraic equations, eigenvalue problems. Application of finite difference methods, interpolation, differentiation and integration, solution of systems of ordinary differential equations, boundary value problems, partial differential equations, and linear and nonlinear regression analysis. These methods are demonstrated via problems encountered in chemical engineering practice ...
By: Aditya Nair One of the most baffling problems in science is that of consciousness. How exactly does our brain create consciousness? What brain mechanisms allow for the development of thoughts? Is consciousness a physical phenomenon? Probing the boundaries of our very existence itself, scientists have been pushing at this question for hundreds of years,…
MWF1 (4-370) Introduction to probability, statistical mechanics, and thermodynamics. Random variables, joint and conditional probability densities, and functions of a random variable. Concepts of macroscopic variables and thermodynamic equilibrium, fundamental assumption of statistical mechanics, microcanonical and canonical ensembles. First, second, and third laws of thermodynamics. Numerous examples illustrating a wide variety of physical phenomena such as magnetism, polyatomic gases, thermal radiation, electrons in solids, and noise in electronic devices. Concurrent enrollment in 8.04 is recommended. Y. Lee ...
Our research group at the University of Houston employs theoretical and computational approaches to understand physical phenomena across multiple disciplines-from materials science to biology. In collaboration with experimentalists, we use methods of applied mathematics, continuum mechanics, atomistic and quantum simulations among others, to carry out our research. I welcome you to our research website and encourage you to explore our ongoing projects.. ...
The Environmental Processes (EP) research focus area of the School of Civil and Environmental Engineering at Cornell University (http://www.cee.cornell.edu/) invites applications for research-based M.S./Ph.D. and Ph.D. studies beginning in the 2017/2018 academic year. Cornell offers graduate students the opportunity to individualize their course of study with a committee of faculty members to select the most important courses to complement their research. Students in the EP focus area take courses related to physical and chemical processes in water and wastewater treatment, water chemistry, biological processes, and a variety of specialized courses including environmental risk analysis, environmental fate and transport modelling, biocatalysis and biodegradation, and can also take advantage of an extensive range of courses in other environment-focused disciplines at Cornell. Research in the EP area generally focuses on the biological, chemical, and physical phenomena that affect the behavior and ...
Ascribing unitary causes to physical phenomena works quite well in the physical sciences, even when a secondary cause might also participate in the effect. In particular, it makes the investigation more transparent. Heres an observed phenomenon. We postulate one specific direct cause. We then test it - does the phenomenon occur every single time when we apply that one specific direct cause? If it does, weve nailed it. If it only happens some of the time, or if it happens in the absence of that specific cause, then something else must be the cause. Our hypothesis has been proved false. Then we have to keep going until we find the precise action that always produces that effect. And then we dig until we figure out exactly why that action produces that effect. That works in the physical sciences, but not so well in the biological sciences.. In living organisms, a single cause can have multiple effects, and in some cases, can have effects that tend in contrary directions. For example, we know that ...
Testing for ovarian cancer or the presence of a particular chemical could be almost as simple as distinguishing an F sharp from a B flat, thanks to a new microscopic acoustic device that has been dramatically improved by scientists at the U.S. Department of Energys (DOE) Argonne National Laboratory.. The device, known as a surface acoustic wave (SAW) sensor, detects frequency changes in waves that propagate through its crystalline structure. This makes it ideal for detecting the presence of chemicals or biomarkers present in a liquid or gas. For example, it can detect cancer proteins attached to a receptor on the sensor surface.. The initial wave is created by a physical phenomenon known as the piezoelectric effect, in which an initial electric signal is converted into a mechanical displacement. This displacement takes the form of a wave transmitted through the crystal.. In the SAW sensor, the signal travels like a seismic wave from the input transducer through the material to an output ...
The ground material occupying area is thin and not so large compared to areas such as atmosphere, ocean, or crust. However, the ground is located in the boundary position among the large areas. So, various amounts of biological activities or special chemical and physical phenomena are observed in geophese. In research process, method for describing the dynamic mechanisms of the ground material from the experimental results or various conservation laws are developed. Additionally, Id like to develop the soil solidification technology using the bio-chemical-thermal reactions and consider the process of forming the soft ground in the seabed. ...
On May 5, 2009 DARPA (Defense Advanced Research Projects Agency) announced that it is preparing to begin an exciting new research program that may be the most ambitious and direct effort by the United States Government to to push human technology closer to the edge of the awaiting Singularity. The program is referred to as Physical Intelligence, and DARPA is currently soliciting interested research groups to develop project proposals for submission. The ultimate goal of the effort will be to fundamentally understand the physical phenomenon of intelligence and to then demonstrate the characteristic in a man-made electronic or chemical system.. Although you might have considered taking on this problem yourself this weekend, its understandable if a weeks worth of yard work and Mothers Day preparations took a critical priority. Leaving this project to large governmental agencies and massive academic and industrial collaborations may be the best idea for your personal work-load at this ...
To examine this behavior, the group used atomic force microscopy on clusters of one such FG domain, called cNup153, tethered at one end to gold nanodots. The forces exerted by the cluster just nanometers above the dot were reminiscent of the behavior of a physical phenomenon known as polymer brushes. Specifically, random flexible movements of polymers (or unfolded FG domains) create a large exclusion volume. Interactions between hydrophobic FG repeats were not seen, suggesting that FG Nups do not form a meshwork. ...