Top Research Papers on Physics

Problem A good foundation in physics enables the practising physiotherapist to effectively design and implement treatments for his/her patients, to better interpret medical imaging diagnostics, and to critically review new techniques. Thus physiotherapy students need to learn the physics that underpins the mechanics of the human body, and techniques both low-tech (eg: icepacks) and high-tech (eg: ultrasound, laser-based therapy, MRI). However, in university physiotherapy programs there is generally poor uptake of physics principles as students (who are generally physics novices) may not app...

This paper is an introduction to discrete physics based on a non-commutative calculus of finite differences. This gives a context for the Feynman-Dyson derivation of non-commutative electromagnetism, and for generalizations of this result. The paper discusses these ideas and their relations with quantum groups and topological quantum field theory.

The cross-platform PHYSIM software framework can compare established modulations like orthogonal frequency-division multiplexing (OFDM) with modern alternatives, e.g., filter bank multi-carrier, universal filtered multi- carrier, and filtered-OFDM.

Annalen der Physik is one of the most influential journals in history of physics.During the revolution of physics in 19-20th century,Annalen der Physik had published a lot of important scientific achievements.In this paper the history and purpose of the journal are introduced,and the relationship between some European prominent physicists and this journal is discussed.

2017 has been a great year for physics. Almost everybody will certainly remember the advent ofmultimessenger astronomy as one of the key events. This entirely new research approach in astrophysics was largely triggered by the achievements of the LIGO Scientific and VIRGO Collaborations and their (by now) series of gravitational wave observations. The basic physics behind the first detected binary black hole merger coded as GW150914 was explained in their article.[1] It is the very first article in Annalen der Physik with a thousand authors that even made it into the scientific background docum...

We present a physics show musical with live physics experiments and live performed songs with live orchestral accompaniment. The musical was first put on stage in German at the Physikalische Institut, University of Bonn, on the 24th of March, 2019. Here we present the original German script as well as an English translation, including a translation of the songs. We also give brief descriptions of all the experiments employed, with photos as well as how we present the experiments. The musical tells the story of a couple, Life and Death, nicknamed Vita and Mortis, who want to buy a planet where ...

This work extends traditional IK and keyframing to include center-of-mass and inertia handles along with physically based templates to help an animator produce trajectories that respect physics during dynamic activities, such as swinging, stepping, and jumping.

Some interesting physical aspects of chemical explosions are compiled. An explosion is understood as a fast release of energy. There are many types of explosion, including a deflagration as a pressure-controlled explosionand a detonation as an explosion independent from boundary conditions. Using a simple model the coupling mechanisms between physics and chemistry in a reaction front of a gas explosion is enlightened. Exploding clouds of hydrocarbons dissipate the released energy mainly by means of heat radiation, blast waves and fragments. Simple theorectical considerations show the principle...

Two physiological parameters seem to be of major importance in maintaining physical functioning in the elderly: a capacity to perform aerobic exercises (endurance fitness) and an ability to do anaerobic work, especially maximal muscle force and power.

The extent to which frameworks may be useful in helping students develop appropriate strategies for representing problems in formal terms, selecting targets, planning solutions and checking answers is discussed.

Some physical and physico-chemical parameters of 15 different Greek cheeses were assessed. Cheeses differed as to the origin (cow, sheep and goat), they had different texture (soft, semi-hard and hard) and they were from different regions in Greece. The aw values in observed samples ranged from 0.799 (in semi-hard cheese Kefalotiri) to 0.889 (in soft cheese Katiki Domokou); while the average value of water activity in the samples was 0.851. Water content of the samples was 24.0 to 73.6 %. Dry matter in cheese thus constituted from 26.4 to 76 %. Fat content in dry matter was from 34.27 to 62.11...

PhysiCL is a Python package that aims to provide general-purpose tools for performing OpenCL-accelerated physics simulations with ease and contains a Numpy-based code units system, a set of generic simulation tools, built-in tools for photon scattering, tools for measuring light behavior, and tools for writing new OpenCL-based simulation features.

In the last year INL has internally pursued the development of a new reactor analysis tool: PHISICS, which is built in a modular approach to simplify the independent development of modules by different teams and future maintenance.

I suppose most of us have a pretty good idea what physics is, although we might have to think hard to define it. At any rate, the Privy Councillors must have been convinced that there was something recognisable and capable of cementing a body of chaps together (pace Professor Jackson) when they granted us the Charter.

Muitas tentativas malsucedidas de solucionar o problema de caracterizar o que e fisico para o fisicalismo foram baseadas em um ou em outro aspecto de nosso conceito de fisico, como a nocao intuitiva de objeto fisico ou a nocao de fisico como correspondendo ao dominio de investigacao da fisica. O artigo apresenta uma tentativa original de solucao do referido problema ao considerar nosso conceito filosofico de fisico de uma forma mais abrangente. Argumenta que a nocao intuitiva de objeto fisico executa um papel na determinacao da tarefa explanatoria da fisica atual. Uma vez que a fisica ideal e ...

A range of interacting solution procedures for turbulent fluid flow, heat transfer with solidification/melting and elasto-visco-plastic solid mechanics are implemented in the first version of PHYSICA, which will be released in source code form to the academic community in late 1995.

The study evaluated the association of the insertion/deletion polymorphism of the angiotensin-converting enzyme gene (ACE I/D) with self-reported moderate-intensity leisure time physical activity (MILTPA), arterial blood pressure (BP) and history of hypertension (HT) in Finland and confirmed a lack of association between ACE I-D and BP or HT.

Abstract The aim of this study was to estimate sample size for the physical and physico- chemical characteristics of the peduncles and nuts of the cashew (Anacardium occidentale L.) as an aid in research using classical analytical methods and near-infrared (NIR) spectroscopy. Sample sizes were estimated by means of uniform stratified sampling, comprising six strata (S1, S2, ..., S6) corresponding to the clones A+C 276/1, BRS 226, CCP 76, HI58-92-2, PRO 553/2 and PRO 555/2. Determining the size of the sample for each stratum depends on the variance of the characteristic under evaluation and the...

Performance of a blast furnace greatly depends on the quality of input raw materials, specifically the iron ore and its agglomerates, judged mainly through its reduction behaviour and strength property. Parameters like Reduci-bility Index (RI) and Reduction Degradation Index (RDI) are considered to be the important quality indicators for the selection of iron bearing material as blast furnace burden.

This study provides information on the physicochemical and physical-mechanical properties of cotton plant seeds. The physical and mechanical characteristics of cotton seeds are crucial for the design and operation of storage facilities, bunkers, transport devices, and machinery in preparatory workshops. Proper ventilation is essential when storing, transporting, and handling oilseeds, as the presence of carbon dioxide can pose safety risks. The study highlights the importance of monitoring carbon dioxide levels in oil warehouses, galleries, tunnels, and pits associated with oilseed transportat...

A novel physical layer security architecture (PHYSec) for Ethernet, operating at the low layer of physical coding sublayer (PCS) provides the following benefits: low overhead due to constructing encryption objects without the restriction of frame size and utilizing native markers to carry security parameters.

In the article, to study the physical, technological and physico-chemical characteristics of hazelnuts, promising varieties of hazelnuts were selected: Ata-baba, Oilseed hazelnuts, Ganja hazelnuts, Ashraf, Kudryavchik and Lombard hazelnuts. Their main dimensions, mass, core yield, solid shell thickness, etc. are measured and recorded. Some technological characteristics of the selected hazelnut varieties were studied. In accordance with the procedure, round-shaped hazelnuts, large and small of this size, were checked in factories for processing products with a diameter of less than 13.2 mm, and...

Physica, a tangible physics simulation system and approach based on tabletop mobile robots, aims to bring the benefits of tangible and haptic interaction into explorable physics learning, which was traditionally only available on screen-based interfaces.

A minor problem in setting up the new universities is what address to use since the word 'Department' is not allowed, although we sometimes forget and say 'department'. For the scientific subjects the word 'Laboratory' describes the place where the hardware is to be delivered. We then have the problem of whether to say 'The Physics Laboratories' or 'The Physical Laboratories'.

I regret that my neighbour, Professor Powles, will find that 'there is no armour 'gainst' the choice between 'Physical' and 'Physics' (Bulletin, November 1964). I have suffered from both applicants for the Gymnasium seeking the Physical Department and also from applicants for the Dispensary seeking the Physic(s) Department. My harassment only ceased when I took the name-plate off my public door and relied upon the hall-porter directing the lost patient to the right place.

Physicalism is the claim that that there is nothing in the world but the physical. Philosophers who defend physicalism have to confront a well-known dilemma, known as Hempel’s dilemma, concerning the definition of ‘the physical’: if ‘the physical’ is whatever current physics says there is, then physicalism is most probably false; but if ‘the physical’ is whatever the true theory of physics would say that there is, we have that physicalism is vacuous and runs the risk of becoming trivial. This article has two parts. The first, negative, part is devoted to developing a criticism of the so-called...

Introduction Hilary Putnam explains that: The appeal of materialism lies precisely in this, in its claim to be natural metaphysics within the bounds of science. That a doctrine which promises to gratify our ambition (to know the noumenal) and our caution (not to be unscientific) should have great appeal is hardly something to be wondered at. (Putnam [1983], p. 210) Materialism says that all facts, in particular all mental facts, obtain in virtue of the spatiotemporal distribution, and properties, of matter. It was, as Putnam says, “metaphysics within the bounds of science,” but only so long as...

This Encylopedia provides some 3,100 detailed entries - illustrated with charts, graphs, and diagrams - spanning ''pure'' physics, astrophysics, radiophysics, plasma physics, superconductors, and more)

The “Principle of Least Action" is the foundational principle of fundamental physics. Application of this principle to the supply chain naturally results in an “uncertainty principle” linking variation in production to variation in net‐inventory. The model also provides an easy means of determining the stationary distribution of net‐inventory for a variety of control strategies. The formalism results in a control strategy that outperforms commonly used control methods.

PHYSICS 100 Quantitative Preparation for Physics 2 cr. Undergraduate. Introductory course in general physics designed for the student with little or no previous science training. Prerequisites: Math Placement Level 10. Course Rules: Fee for 3 cr assessed. Not open to students w/cr in Physics 110(ER), 120(ER), or 209(ER). Last Taught: Spring 2015, Fall 2014, Spring 2014, Fall 2013. Current Offerings: https://catalog.uwm.edu/course-search/

Since the discovery of X-rays in 1895, the X-ray imaging has been an indispensable technique in diagnostic and industrial imaging. While the machines constantly improved over time, the way the contrast is generated has not changed over one century -– only the attenuation of X-rays has been used as a contrast mechanism. Over the last two decades, phase-contrast X-ray imaging has been developed using the refraction of X-rays to generate the contrast. This kind of imaging has been demonstrated to provide superior soft-tissue contrast in comparison to conventional attenuation-based X-ray imaging. ...

This study was carried out in 2001 using some organic (peat moss, peat, sawdust) and inorganic (perlite, pumice, creek sand) substrates. pH, electrical conductivity, cation exchange capacity, carbonates, organic matter, particle size distribution, bulk density, water retention characteristics and pore size distribution of substrates were determined. The amount of water retained at the low tensions (< pF 2.52) in pumice, sawdust, peat moss, perlite, peat and creek sand was 62.6, 59.2, 57.1, 53.7, 53.0 and 28.9 based on % of volume, respectively. However, among the organic-organic, inorganic-ino...

Theri lands are located along the coastal areas of Tuticorin district of Tamilnadu, South India. Proper management of the land is difficult because of its poor quality structure, low nutrition, meagre moisture holding capacity, low value of organic content, and high value of hydraulic conductivity. The permeability of water in theri soil is high and is not suitable for agriculture which is presently considered as a wasteland. The objective is to nurse the soil back to health and reclaim the soil. Goat Manure amended with theri soil characteristics are studied separately. In this amendment, ten...

Campbell, R. S., and J. T. Cassady. 1951. Grazing values for cattle on pine forest ranges in Louisiana. La. Agr. Exp. Sta. Bull. 452, 31 p. Campbell, R. S., E. A. Epps, Jr., C. C. Moreland, J. L. Farr, and F. Bonner. 1954. Nutritive values of native plants on forest range in central Louisiana: La. Agr. Exp. Sta. Bull. 488, 18 p. Derr, H. J., and H. G. Enghardt. 1969. Growth in a young managed longleaf pine plantation. J. Forest. 67:501-504. Duvall, V. L. 1962. Burning and grazing increase herbage on slender bluestem range. J. Range Manage. 15:14-16. Duvall, V. L., and J. B. Hilmon. 1965. New g...

Abstract : Das DVL-Institut fur Physik der Atmosphare bearbeitet alle Fragen der Umgebungsbedingungen fur Flugzeuge, Flugkorper und Raketen, soweit sie sich innerhalb der Erdatmosphare bewegen. Das Gebiet der groBraumigen Flugmeteorologie: Wertvolles Material uber die Struktur des Jetstreams und das Vorkommen von Clear Air Turbulence durch Messungen wird laufend auf Transozeanflugen der Deutschen Lufthansa gewonnen; Fragen der atmospharischen Optik: Fur Messungen der meteorologischen Sicht und Untersuchungen des atmospharischen Aerosols wurden leistungsfahige StreulichtmeBgerate auch fur die h...

The present short review are given the results of the work carried out in the Laboratory concerned with the structural apparatus of muscle contraction or with the enzymic properties of the substrate and the energetics of muscles contraction, studying muscle protein properties and models on the one hand and living muscle fibres on the other.

Alles zum Thema Physik fA¼r Studenten, an denen Physik studiert werden kann, bis zu Downloads von Labor-Protokollen und Programm-Codes fA ¼r Informatik.

Pregelitinized rice (PR), pregelitinized waxy rice (PWR), and pregelitinized rice flour (PRF) were evaluated for physico-chemical properties comparing with rice starch and acetylated potato starch. L value was decreased during drum drying. PFR had the highest value (P. PWR had the highest value for apparent viscosity and rice samples had a steady apparent viscosity during heating at . Viscosity was decreased as pH decreased at room temperature and drastically decreased below pH 2. Rice starch and PR had no significant effect for change of pH. Change of viscosity had more effect for hot temp. t...

Pulp rheology is an important factor affecting flotation. The effects of particle size (150-74 μm, 74-38 μm, 38-23μm, -23 μm), pulp density (11.76%-34.78%), pH (5.3-12.4), collector concentration (25-500 mg/dm3), and stirring intensity (400-900 rpm) on the rheology of smithsonite, kaolinite, quartz, and calcite minerals were investigated in detail. Additionally, the agglomerate morphology of particles was observed by a polarizing microscope. The results showed that as the mineral particle size decreased and pulp density increased, the apparent viscosity and yield stress of the pulp increased. ...

Patients can perform rehabilitation without the continuous specialist's surveillance and can be sure of its accuracy using this proposed rehabilitation system using a mobile device and a bracelet to capture patient's rehabilitation relevant data.

Topological phases of matter exhibit remarkable electronic properties that offer unique possibilities for applications. A prominent example is the robust quantization of the Hall conductivity in quantum Hall insulators. A widespread technique for generating topological band structures in synthetic systems, such as ultracold atoms in optical lattices, is Floquet engineering [1]. This method relies on the periodic modulation of the system’s parameters to emulate the properties of a non-trivial static system and facilitated the realization of two paradigmatic topological lattice models: the Hofst...

The level of PA practice in all study groups was between the low and the lowest indicator, and the main motivations underlying PA are: enjoyment, competence/challenge, and fitness/health.

Modelling of elementary particles is a very important question in contemporary physics, in fact in the absence of a real physical representation, due to smallest sizes of particles, the identification of suitable models becomes necessary. It is known that postmodern physics is characterized still by the indeterministic dualism wave-corpuscle that prevents to give an unequivocal identity to elementary particles as per the obsolete paradigm: is the particle wave or corpuscle? or: is the particle at the same time wave and corpuscle? Research of suitable and coherent models is therefore fundamenta...

Unter dem Label Inquiry-based sind in den letzten Jahren diverse Lehrkonzepte entwickelt worden. Der hier vorgestellte Lehransatz hat eine Entwicklungsgeschichte, die bis in die 1970er Jahre zuruckreicht. Gleichwohl sind Physics by Inquiry wie auch Arnold Arons, auf dessen Grundideen der Ansatz beruht, im deutschsprachigen Raum wenig bekannt. Seine Zielstellung besteht in der Verbesserung des konzeptuellen Physikverstandnisses von Studienanfangern. Die hervorstechenden Merkmale sind eine Betonung operationalen Wissens, das Prinzip, physikalische Konzepte in experimenteller Arbeit und unter Ver...

Estimation of water retention characteristics, penetrability, weighted mean diffusivity and cation exchange capacity (CEC) of soil is difficult though imperative to characterize any soil and study the soil water relation. Therefore, with the measured values of clay, organic and humus carbon, pore space, coarse sand, soil volume expansion, pH, saturated hydraulic conductivity and absolute specific gravity of twelve different soils, linear, quadratic and logarithmic regressions were evaluated separately in different relevant combinations for determining the above properties. Validation of relati...

The objective of this study is to characterize the physical and physicochemical properties of butiri (Mauritia flexuosa L.) providing subsidies for industrial use in large-scale production of food products. The work was performed at the Laboratory of Processing and Storage of Agricultural Products (Lappa), Federal University of Campina Grande (UFCG PB). The characteristics evaluated were: color, through instruments measured using spectrophotometer MiniScan HunterLab XE Plus , the CIELAB color system give the readings of L * (lightness), a* (green color transition for a * red + a *) and b * ( b...

The concepts, design guidelines, and implementation details of PhySig, a novel interactive in-store shopping experience that annotates information about products by a projector and enables shared content between the products and mobile devices, are proposed.

Due to the increase of exotic fruit consumption worldwide, the cultivation of dragon fruit has been favored. To increase the agronomic potential of the culture, knowledge aiming the increase of fruit quality is necessary. The aim of this study was to evaluate the physical-chemical and pyhisical characteristics of dragon fruit during maturation, in order to define the best harvest point. Fresh weight, longitudinal and transverse diameter, skin color, flesh firmness, soluble solids content, titratable acidity, ratio and flesh pH were evaluated. A completely randomized design was carried out, rep...

Sample Preparation, Isolation and Characterization of Surfactants and Determination of Surface-Active Ions. Elementary Composition and Structural Characteristics: Controlled Degradation. Separation of Mixtures of Surfactants. Selected Methods for the Quantitative Analysis of Surfactants. Spectrometry. Electrometry and Other Physical and Physico-Chemical Methods. References. Index.

PhysIK is a physics-based character posing and inverse kinematics algorithm inspired by how artists manually pose wooden mannequins that is useful for animation as well as static posing.