Academic literature on the topic 'Middle energy physics'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Middle energy physics.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Middle energy physics"
1
Janhunen, P., A. Olsson, H. Laakso, and A. Vaivads. "Middle-energy electron anisotropies in the auroral region." Annales Geophysicae 22, no. 1 (January 1, 2004): 237–49. http://dx.doi.org/10.5194/angeo-22-237-2004.
Full textAbstract:
Abstract. Field-aligned anisotropic electron distribution functions of T∥ > T⊥ type are observed on auroral field lines at both low and high altitudes. We show that typically the anisotropy is limited to a certain range of energies, often below 1keV, although sometimes extending to slightly higher energies as well. Almost always there is simultaneously an isotropic electron distribution at higher energies. Often the anisotropies are up/down symmetrical, although cases with net upward or downward electron flow also occur. For a statistical analysis of the anisotropies we divide the energy range into low (below 100eV), middle (100eV–1keV) and high (above 1keV) energies and develop a measure of anisotropy expressed in density units. The statistical magnetic local time and invariant latitude distribution of the middle-energy anisotropies obeys that of the average auroral oval, whereas the distributions of the low and high energy anisotropies are more irregular. This suggests that it is specifically the middle-energy anisotropies that have something to do with auroral processes. The anisotropy magnitude decreases monotonically with altitude, as one would expect, because electrons have high mobility along the magnetic field and thus, the anisotropy properties spread rapidly to different altitudes. Key words. Magnetospheric physics (auroral phenomena). Space plasma physics (wave-particle interactions; changed particle motion and acceleration)
2
Pei, Yujuan, Xiaoran Liu, Fangdi Wen, M. Kareev, Ruyi Zhang, Yang Song, Jiachang Bi, Yanwei Cao, and Jak Chakhalian. "Probing emergent excitations with middle-energy electron energy loss spectroscopy." EPL (Europhysics Letters) 128, no. 5 (February 4, 2020): 57001. http://dx.doi.org/10.1209/0295-5075/128/57001.
Full text
3
Chen, Weilong, Zhijun Wang, Shuhui Liu, Chi Feng, Mengxin Xu, Weiping Dou, Xin Qi, Xiaoying Zhao, Haoye Wang, and Yuan He. "Physics design of the CiADS MEBT." International Journal of Modern Physics A 36, no. 17 (June 7, 2021): 2150127. http://dx.doi.org/10.1142/s0217751x2150127x.
Full textAbstract:
The superconducting linac for China initiative Accelerator Driven Subcritical System (CiADS) is the world-leading ADS-driver under construction with state-of-the-art technologies. This system is designed to accelerate a 5 mA proton beam to 500 MeV energy, and then delivering 2.5 MW of beam power to the neutron production target. The Middle Energy Beam Transport (MEBT) is designed with great emphasis on smoothing matching between the upstream and downstream acceleration sections, beam diagnostics layout and beam quality control. It is proposed and successfully implemented to immigrate the phase space distortion and reduce the increase of beam emittance. The acceptance of MEBT is optimized to make all the particles inside the effective acceptance of the superconducting section even with machine errors. This pertinent design of MEBT is suitable for the high-power superconducting accelerator of CiADS.
4
Pujadas-Gispert, E., C. C. Korevaar, M. Alsailani, and S. P. G. Moonen. "LINKING CONSTRUCTIVE AND ENERGY INNOVATIONS FOR A NET ZERO-ENERGY BUILDING." Journal of Green Building 15, no. 1 (January 1, 2020): 153–84. http://dx.doi.org/10.3992/1943-4618.15.1.153.
Full textAbstract:
INTRODUCTION This article explains the design, construction and energy strategies of LINQ, a netzero energy building that was successfully entered into the Solar Decathlon Middle East 2018 held in Dubai. Students of engineering, building physics, architecture and urban planning designed, built and operated LINQ. It is mainly powered by solar energy and made of bio-materials. Some of LINQ's innovations are the ventilated façade with customizable bio-based tiles, the indirect evaporative water cooling system, and the light building integrated photovoltaic-thermal system. LINQ sent more energy to the grid than it drew throughout the competition. However, energy production could have been improved according to simulations and technical specifications. LINQ is a good example of current and future building expectations—combining multiple criteria, strategies, and solutions—to contribute to environmental, social and economic sustainability.
5
Mufida, S. N., P. Sinaga, and A. Samsudin. "Identification of physics problem-solving skills on senior high school students: An evaluation of e-learning during Covid-19 pandemic in Tuban." Journal of Physics: Conference Series 2098, no. 1 (November 1, 2021): 012017. http://dx.doi.org/10.1088/1742-6596/2098/1/012017.
Full textAbstract:
Abstract On the topic of work and energy, students learned the concepts of work and energy, the relationship between work and energy changes, the law of conservation energy, power, and its application in daily-life. This research aimed to identify and evaluate the achievement of physics problem-solving skills of senior high school students on work and energy topics in distance learning during the Covid-19 pandemic. The quantitative method used was preexperiment with a one-shot case study design. The subjects were determined using the cluster sampling technique. The sample was 246 students of tenth-grade from three schools, namely in the city, middle, and suburb location in Tuban East Java Indonesia. The research results were analyzed by using descriptive quantitative. This research instrument used essay questions and teacher questionnaires. The Kruskal Wallis test showed that the mean of three schools differed significantly by 0.002<0.05. The overall students’ physics problem-solving skills on the topic of work and energy are classified as moderate. The fact of these findings suggests that students still have difficulty in useful description, physics approach, specific application of physics, mathematical procedures, and logical progression and consistent reasons. It is necessary to develop teaching materials that can train physics problem-solving skills.
6
Supraptono, Eko, Henry Ananta, and Sisca Damayanti. "Recloser system technology on middle voltage transmission of electric energy." Journal of Physics: Conference Series 1444 (January 2020): 012015. http://dx.doi.org/10.1088/1742-6596/1444/1/012015.
Full text
7
NI, WEI-TOU. "GRAVITATIONAL WAVES, DARK ENERGY AND INFLATION." Modern Physics Letters A 25, no. 11n12 (April 20, 2010): 922–35. http://dx.doi.org/10.1142/s0217732310000071.
Full textAbstract:
In this paper we first present a complete classification of gravitational waves according to their frequencies: (i) Ultra high frequency band (above 1 THz); (ii) Very high frequency band (100 kHz–1 THz); (iii) High frequency band (10 Hz–100 kHz); (iv) Middle frequency band (0.1 Hz–10 Hz); (v) Low frequency band (100 nHz–0.1 Hz); (vi) Very low frequency band (300 pHz–100 nHz); (vii) Ultra low frequency band (10 fHz–300 pHz); (viii) Hubble (extremely low) frequency band (1 aHz–10 fHz); (ix) Infra-Hubble frequency band (below 1 aHz). After briefly discussing the method of detection for different frequency bands, we review the concept and status of space gravitational-wave missions — LISA, ASTROD, ASTROD-GW, Super-ASTROD, DECIGO and Big Bang Observer. We then address to the determination of dark energy equation, and probing the inflationary physics using space gravitational wave detectors.
8
Wittmann, Michael C., Laura A. Millay, Carolina Alvarado, Levi Lucy, Joshua Medina, and Adam Rogers. "Applying the resources framework of teaching and learning to issues in middle school physics instruction on energy." American Journal of Physics 87, no. 7 (July 2019): 535–42. http://dx.doi.org/10.1119/1.5110285.
Full text
9
Baccaro, S., A. Cecilia, A. Cemmi, E. Mihokova, M. Nikl, K. Nitsch, P. Polato, G. Zanella, and R. Zannoni. "Colour centres induced by γ irradiation in scintillating glassy matrices for middle and low energy physics experiments." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 185, no. 1-4 (December 2001): 294–98. http://dx.doi.org/10.1016/s0168-583x(01)00760-1.
Full text
10
ZHELEZNYKH, IGOR. "EARLY YEARS OF HIGH-ENERGY NEUTRINO PHYSICS IN COSMIC RAYS AND NEUTRINO ASTRONOMY (1957-1962)." International Journal of Modern Physics A 21, supp01 (July 2006): 1–11. http://dx.doi.org/10.1142/s0217751x06033271.
Full textAbstract:
Ideas of deep underground and deep underwater detection of high-energy cosmic neutrinos were firstly suggested by Moisey Markov in the end of 50th. Frederic Reines was one of those who first detected high-energy atmospheric neutrinos in underground experiments in the middle of 60th (as well as low energy reactor neutrinos 10 years earlier!). Markov and Reines closely collaborated in 70th – 80th in discussion of alternative techniques for large-scale neutrino telescopes. Some events of 50 – 80 years relating to the development of a new branch of Astronomy – the High-Energy Neutrino Astronomy, in which Markov and Reines took part, were described in my talk at ARENA Workshop. Below the first part of my talk at the Workshop is presented describing discussions and meetings the neutrino physics and astrophysics relating to the period 1957-1962 when I was Markov's student and later post-graduated student.
Dissertations / Theses on the topic "Middle energy physics"
1
Kubsch, Marcus [Verfasser]. "Beyond Forms - Findings from a new Approach to teaching Energy in Middle School / Marcus Kubsch." Kiel : Universitätsbibliothek Kiel, 2019. http://d-nb.info/1197612483/34.
Full text
2
Davidson, Lance Eric. "Physical Activity and Changes in Abdominal Fat Over 18 Months: A Prospective Study of Middle-Aged Women." BYU ScholarsArchive, 2003. https://scholarsarchive.byu.edu/etd/1140.
Full textAbstract:
Objective: To investigate the extent to which changes in physical activity predict changes in abdominal fat in women over an 18-month period, while statistically controlling the effects of possible confounders, such as age, total body fat percent, and energy intake. Design: A prospective cohort design over 18 months. There was no intervention or treatment. Changes in objectively-measured physical activity were used to predict changes in abdominal fat over the study period. Subjects: 110 healthy, middle-aged women (mean: 41.3±3.3 yrs), primarily Caucasian, educated, and married. Measurements: An objective measure of physical activity (ACT) using CSA accelerometers, worn continuously for 7 consecutive days at baseline and again at follow-up. Total body fat and abdominal fat percent were assessed by dual energy x-ray absorptiometry (DEXA). Energy intake was estimated using 7-day, weighed food records for the days in which subjects wore accelerometers. Results: No significant change between baseline and follow-up means for abdominal fat, physical activity, or energy intake over the study period. Moreover, change in physical activity was not a significant predictor of change in abdominal fat, with or without statistical control of confounders. Change in energy intake was a predictor of abdominal fat (P=0.0688), and this association was strengthened after adjusting for age, baseline total body fat, and changes in physical activity. Conclusions: Apparently, when measured using accelerometers, changes in physical activity are not predictive of changes in abdominal fat over an 18-month period. However, changes in energy intake seem to predict changes in abdominal fat. Evidently, increases and decreases in abdominal fat are more a function of energy intake than physical activity in middle-aged women.
3
Chen, Yanni. "An economic analysis of decisions on physical activity and energy imbalance cross-sectional evidence from a panel of middle-aged adults /." [Ames, Iowa : Iowa State University], 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3369817.
Full text
4
Wisetsuwannaphum, Sirikarn. "Electrochemical studies of carbon-based materials." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:b18b808e-c517-4b18-9cf7-6f2a6714f8d4.
Full textAbstract:
Graphene, as a recently discovered carbon allotrope, possesses with it many outstanding properties ranging from high electrical conductivity to great mechanical strength. Single layer graphene can be prepared by mechanical cleavage of graphite or by a more sophisticated method, CVD. However, the scale-up process for these preparation techniques is still unconvincing. Solution-processed graphene from exfoliation of graphite oxide on the other hand provides an alternative prospect resulting in the formation of graphene nanoplatelets (GNPs), which can be readily manipulated to tailor-suit various application demands. The main aim of the thesis is to explore the possibility and availability of this versatile method to produce graphene nanoplatelet and its composites with good all-round performance in energy and bioanalytical applications. A range of physical and chemical characterisation techniques were utilised including SEM, TEM, AFM, XPS, XRD, DLS, FTIR, Raman and UV-Vis spectroscopy in order to investigate the structural and chemical information of the graphene-based materials prepared. Functionalisation of graphene oxide with polyelectrolyte polymer could facilitate deposition of platinum nanoparticles in the formation of Pt-GNPs composites. The resultant composite was employed for bioanalytical application in the detection of an important neurotransmitter, glutamate, based on glutamate oxidase enzyme. The performance of Pt-GNPs based glutamate sensor exhibited enhanced sensitivity and prolonged stability compared to the sensors based on Pt decorated diamond or glassy carbon electrodes. The significant interfering effect from concomitant electrochemically active biological compounds associated with Pt-GNPs electrode however could be alleviated via opting for Prussian blue deposited GNPs electrode instead. The oppositely charged Pt-GNPs due to different functionalising polymers were also subject to self-assembly, which was enabled by the electrostatic interaction of the opposite charges of Pt-GNPs. The self-assembled film showed enhanced mechanical stability than the conventional drop-casted film and provided reasonably good activity towards oxidation of hydrogen peroxide. Three-component composite of graphene, nanodiamond and polyaniline was prepared via in-situ polymerisation for usage as an electrode material in electrochemical capacitors ("supercapacitors"). The addition of graphene was shown to significantly enhance specific capacitance while nanodiamond could improve the stability of the electrode by strengthening the polymer core. Another approach to produce a supercapacitor was via electrodeposition of nickel and cobalt hydroxides on graphene oxide film corporated with bicarbonate salt. The film was then subject to thermal reduction of GO and expansion of graphene layers within the film was observed. This leavening process enhanced the surface area of graphene film and thus the higher specific capacitance was obtained. The decoration of nickel and cobalt hydroxides onto the film also boosted the specific capacitance further however the poor cycling stability of the heated film still remained an issue. Graphene nanoplatelets were also used as a support for electrodeposition of Pt nanoparticles for methanol oxidation in acidic media. The preferential phase of the Pt deposited and large surface area of graphene in comparison to other carbon supports studied led to good catalytic activity being observed.
5
Viljoen, Janet Erica. "The effect of progressive resistance training on the blood lipid profile in post-menopausal women." Thesis, Rhodes University, 2009. http://hdl.handle.net/10962/d1005191.
Full textAbstract:
The main purpose of this study was to assess the effect of progressive resistance training on the blood lipid profile in post-menopausal women. Thirty-four female subjects aged 50 to 75 years were selected from the population of Grahamstown, South Africa. All participants were previously sedentary and possessed at least one lipid profile abnormality but were otherwise healthy. Pre-tests included a sub-maximal stress Electrocardiogram, measures of stature, mass, central and limb girths as well as an oral glucose tolerance test (OGTT) and a total blood lipid profile. Participants took part in a 24-week progressive resistance training programme, consisting of three supervised sessions per week, each lasting 45 minutes and were not permitted to lose more than 10% of initial body mass during the 24-week study. All pre-test measures, excluding the stress ECG and the OGTT, were repeated every four weeks for the duration of the study. Results were that body mass, body mass index and waist-to-hip ratio did not change. Girth measures at mid-humerus, chest, waist, hip, mid-quadricep and mid-gastrocnemius all decreased significantly (p=0.05). LDL-cholesterol increased significantly over the course of 24 weeks (3.61mmol.L-1 to 4.07mmol.L-1) as did total cholesterol (5.81mmol.L-1 to 6.24mmol.L-1). Triglyceride concentration remained unchanged and HDL-cholesterol decreased significantly between the pre-test measure (1.55mmol.L-1) and the measure after six months (1.42mmol.L-1). It can be concluded that the blood lipid profile in a sample of post-menopausal women was not positively affected by a progressive resistance training programme over a 24 week period.Maiden name: Kelly, Janet Erica
6
Banner, Amy Bennett. "A Comparative Study of the Perceptions of Elementary School Administrators, Teachers, and Students Regarding recess and Free Play in the Public School." Digital Commons @ East Tennessee State University, 2005. https://dc.etsu.edu/etd/1005.
Full textAbstract:
According to recent studies, the number of schools that have severely limited or eliminated recess and free-play opportunities is on the rise across the nation. School officials cite the increasing levels of state and federal pressure to perform on standardized tests as the primary reason for this shift away from the playground. The threat of lawsuits and safety concerns are also listed as factors in this change of policy.
The purpose of this mixed methods study was to examine the perceptions of directors of schools, supervisors, principals, assistant principals, teachers, and students regarding recess and free play in three East Tennessee school systems. Representative schools were chosen from each system and examined. In addition, results from standardized test scores as provided by the state of Tennessee were examined for the selected schools.
The findings of this study revealed that directors, supervisors, principals, teachers, and students were in favor of recess and stated that offering recess and free-play opportunities provided some benefit to students. Even so, two schools in the study had chosen to limit recess and free-play opportunities to varying degrees whereas the third school maintained a policy of recess breaks. In examining the test data, the two schools that had limited recess were found to have lower test scores than the school that had maintained the integrity of recess. Other factors could attribute to the lower scores. The findings did reveal that limiting recess appeared to offer no significant gain in scores just as providing recess did not appear to cause any decrease in test scores. Stakeholders interviewed expressed the perception that the benefits of having recess outweighed any potential threat of time lost in the classroom. Recommendations for further research include repeating this study in other school settings on a larger scale to see if the same results are realized.
7
Manjappa, Rakesh. "3D Dosimetry using optical tomography and electronic portal images." Thesis, 2018. https://etd.iisc.ac.in/handle/2005/4484.
Full textAbstract:
The primary goal of this thesis is to develop techniques to quantify the radiation
dose distributions used in radiotherapy for cancer treatment. It aims at developing
a physically profound calculation model for the transit dosimetry by a detailed
characterization of the radiation interaction with tissues and the
fluence
measurements recorded in electronic portal imaging device (EPID). Radiotherapy
has undergone great advances with developments such as Intensity Modulated
Radiotherapy (IMRT), Volumetric modulated Arc therapy (VMAT), Radiosurgery,
CyberKnife, and advances in Brachytherapy. These newer methods help in precisely
administering radiation dose to patients as decided by the treatment planning
system (TPS), a computer system that takes input from patient CT, medical
physicist, oncologist, medical dosimetrist and physician.
The radio-therapy treatment system depends on 3D dosimetry for pre-treatment
quality assurance. The polymer gel dosimeters are used for estimating the 3D dose
distribution using a treatment plan decided by the radiation treatment plan (RTS)
before the patient undergoes radiation exposure. Gel phantoms are prepared using
monomers to be tissue equivalent radiologically. The optical computed tomography
has been used to scan the gel dosimeters. It was observed that upon irradiation, the
monomers in gel get polymerized. Calibration measurements with varying levels of
radiation exposure show that, optical density and refractive index increase with
radiation dose. The optical density increased from (0.01 to 0.06) mm1 and the
refractive index increased from (1.34 to 1.37) for gel irradiated from (0.5 to 25) Gy
dose. The SEM imaging of calibration gels show that the particle size increases from
20nm to 400nm on radiation exposure.
The exposure of radiation to tissue causes an increase in refractive index,
thereby bending the light traversing through the tissue, resulting in deterioration in
image quality. The solution for this is to immerse the dosimeter in a refractive index
matching liquid. However, an exact match is seldom achieved. The refraction of
light passing through a dose region results in artefacts in the reconstructed images.
These refraction errors are dependent on the scanning geometry and collection
optics. The refraction arises primarily due to (1) the refractive index mismatch
between the surrounding medium and the dosimeter which results in distortions of
dose regions and (2) the refractive index changes caused by radiation dose in the
dosimeter itself that result in streaking, and quantitative errors. In order to account
for these effects and correct the distortions we used ray path modelling of light
traversed through the dosimeter. Exact path length of the ray in a discretized grid
was obtained by using ray tracing methods.
Rayline errors perturb the system when rays confront a radiation induced RI
gradient region. This is more signi ficant in 3D as the ray get deviated and does not
reach the detector plane. We extended this study to 3D, used a prototype
cone-beam scanning system to collect the projection images. We developed a fully
3D image reconstruction algorithm, algebraic reconstruction technique-refraction
correction (ART-rc) that corrects for the refractive index mismatches present in a
gel dosimeter scanner not only at the boundary, but also for any rayline refraction
due to multiple dose regions inside the dosimeter. In this study, simulation and
experimental studies have been carried out to reconstruct a 3D dose volume using
2D CCD measurements taken for various views.
Radiation dose absorbed at a tissue voxel can be calculated from kernels which
incorporate the effects of all the interactions with matter using Monte Carlo based
techniques. We studied pencil beam and point kernel based methods. Radiological
depth calculation using ray tracing technique was used for path length calculations in
a inhomogeneous phantom/patient volume. This is integrated with collapsed-cone
convolution superposition algorithm to arrive at the complete dose-distribution.
Dose reconstruction results using Monte Carlo and collapsed cone methods are
presented. The EPID image was corrected with scatter factor measurements. The
corrections improved the dose quanti cation from 88.9% to 96.5%. The resulting
dose Monitor Unit (MU) values matches well with that from TPS computation. Per
eld EPID
uence, calculated from segment wise portal images acquired using step
and shoot technique of the IMRT prostate eld is validated.
The main ndings of this study are:
1 We have demonstrated that gel dosimeters can be used to verify dose pro les
delivered using Co-60 telecobalt machines, linear accelerators, IMRT, VMAT
and Brachytherapy.
2 Refraction e ects deteriorate dose readout and induce errors in quantifying
dose. These can be overcome by using ray tracing method that calculate exact
pathlength accounting for refraction.
3 Boundary mismatch can be overcome by using exact matching liquid, but
interior refractive index changes induced by radiation can be accounted for
using our ray modelling scheme.
4 The Monte Carlo modelling of polarized light propagation in a multi-layered
turbid medium is extended to include multiparticle distribution of scatterers
and also with embedded absorbing/ scattering inhomogeneities.
5 Fluence measurements acquired using EPID along with appropriate scatter
factor corrections were found to match with those calculated by treatment
planning system (TPS). In conjunction with collapsed cone
convolution/superposition method, it can be used to compute 3D dose
distributions.
8
Seshadri, Ranjani. "Living on the Edge A Study of Boundary Modes In Two-dimensional Topological Systems." Thesis, 2018. https://etd.iisc.ac.in/handle/2005/5384.
Full textAbstract:
In the last few decades an enormous amount of research has been carried out on some novel
phases of matter called topological phases which are beyond the paradigm of Landau’s theory
of symmetry breaking. One of the earliest breakthroughs in this field was the discovery of
the quantum Hall effect. A topological system has some properties which are immune to slight
perturbations which obey the symmetries of the unperturbed system. Topological systems can be
characterised by means of a topological invariant, such as the Chern number in two-dimensional
systems. Topological phases can be found in a variety of systems and have been studied both
theoretically and experimentally over the last several years.
Topological insulators (TIs) are materials which have gapped states in the bulk and gapless states
on the boundaries which are protected by some symmetries. Materials such as bismuth selenide
and bismuth telluride exhibit such properties and are examples of topological insulators in three
dimensions. The surfaces of these materials host conducting states which are robust against
impurities. An interesting property of these surface states is “spin-momentum locking”. This
is responsible for preventing backscattering of these surface modes from scalar (non-magnetic)
impurities.
In two dimensions, topologically protected one-dimensional edge states are found to exist in
graphene nanoribbons with a spin-orbit coupling (SOC). This was one of the earliest theoretically
proposed examples of the quantum spin Hall effect. Though the intrinsic SOC in graphene
is weak, placing it in proximity to a TI is known to induce a stronger SOC giving rise to some
very interesting phenomena, some of which are discussed in this thesis. Topological phases
can also be seen in some models involving interacting spins such as the kagome lattice spin
model which is presented in this thesis. In this case, it is the magnons or spin waves which are
topological in nature
To summarise, this thesis deals with topological phases and edge modes in three different systems
1. Surface states of three-dimensional topological insulators,
2. Graphene in the presence of Kane-Mele and Rashba spin-orbit couplings,
3. Spin waves (magnons) on a kagome lattice.
In all these cases localised states are found to reside on the boundaries of the system or along
potential barriers.
Books on the topic "Middle energy physics"
1
Study, Biological Sciences Curriculum, and Kendall/Hunt Publishing Company, eds. BSCS science & technology. 3rd ed. Dubuque, IA: Kendall/Hunt Publishing Co., 2005.
Find full text
2
Plasker, Eric. The 100 year lifestyle workout: The high energy fitness program for living at your peak throughout your lifetime. Guilford, Conn: GPP, 2010.
Find full text
3
Plasker, Eric. The 100 year lifestyle workout: The high energy fitness program for living at your peak throughout your lifetime. Guilford, Conn: GPP Life, 2010.
Find full text
4
Plasker, Eric. The 100 year lifestyle workout: The high energy fitness program for living at your peak throughout your lifetime. Guilford, Conn: GPP, 2010.
Find full text
5
Codoban, Sorin. Available energy of symmetric circulations with application to the middle atmosphere. 2007.
Find full text
6
Padilla, Michael J., Ioannis Miaoulis, and Martha Cyr. Motion, Forces, and Energy. Pearson Prentice Hall, 2001.
Find full text
7
Padilla, Michael J., Ioannis Miaoulis, and Martha Cyr. Motion, Forces, and Energy. Pearson Prentice Hall, 2001.
Find full text
8
McGraw-Hill. Glencoe Science: Motion, Forces, and Energy, Student Edition. Glencoe/McGraw-Hill, 2001.
Find full text
9
Investigating Physical Systems. Kendall/Hunt Publishing Co ,U.S., 2003.
Find full text
10
McGraw-Hill. Glencoe Science: Motion, Forces, and Energy, Spanish Student Edition. Glencoe/McGraw-Hill, 2001.
Find full textBook chapters on the topic "Middle energy physics"
1
Peterson, Erik L. "A ‘Fourth Wave’ of Vitalism in the Mid-20th Century?" In History, Philosophy and Theory of the Life Sciences, 173–92. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-12604-8_10.
Full textAbstract:
AbstractIn his 1966 John Danz lectures, Francis H. C. Crick decried vitalism in the life sciences. Why did he do this three decades after most historians and philosophers of science regarded vitalism as dead? This essay argues that, by advocating the reduction of biology to physics and chemistry Crick was: (a) attempting to imbue the life sciences with greater prestige, (b) paving the way for bioengineering and the reduction of consciousness to molecules, and (c) trying to root out religious sentiment in the life sciences. In service of these goals, Crick deployed vitalism as a straw man enemy. His wave of so-called vitalists in the middle of the twentieth century in fact raised legitimate questions regarding the relationship of organisms to their DNA molecules that Crick was ill-equipped to answer. Moreover, most were not vitalists at all but advocates for what I term bioexceptionalism—an argument for the methodological utility of keeping biological pursuits within their own domains, distinct from physics and chemistry, regardless of the ontological status of living things. Nevertheless, Crick’s status as a “cross-worlds influencer” entrenched a philosophically-enervated reductionism in the life sciences for decades.
2
Daniel, Larry J. "The Middle Tennessee Debacle." In Conquered, 158–71. University of North Carolina Press, 2019. http://dx.doi.org/10.5149/northcarolina/9781469649504.003.0012.
Full textAbstract:
In April 1863, the Federals finally made offensive maneuvers, and Bragg was apparently in increasingly poor physical condition. Johnston travelled to Jacksonville, Mississippi, but the city fell to the Yankees. In May, President Davis requested Bragg send troops to Mississippi. Bragg sent his old enemy Breckenridge with his forces, and some of his losses were offset by brigades sent from other states. Rosecrans advanced on the Hoover Gap and effectively out-maneuvred the Confederates. Bragg then retreated, leaving Middle Tennessee to fall to the Yankees. The loss of the middle Tennessee territory in addition to the defeat in Gettysburg depreseds morale throughout the Confederate army.
3
Ghasemzadeh, Farzaneh, and Mostafa Esmaeili Shayan. "Nanotechnology in the Service of Solar Energy Systems." In Nanotechnology and the Environment. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.93014.
Full textAbstract:
Nanotechnology can help to address the existing efficiency hurdles and greatly increase the generation and storage of solar energy. A variety of physical processes have been established at the nanoscale that can improve the processing and transmission of solar energy. The application of nanotechnology in solar cells has opened the path to the development of a new generation of high-performance products. When competition for clean energy options is growing, a variety of potential approaches have been discussed in order to expand the prospects. New principles have been explored in the area of solar cell generation, multi-generation, spectrum modulation, thermo-photoelectric cells, hot carrier, the middle band, and many other techniques. Nanoparticles and nanostructures have been shown to enhance the absorption of light, increase the conversion of light to energy, and have improved thermal storage and transport.
4
Stewart, Mary K., Danielle E. Hagood, and Cynthia Carter Ching. "Using Multi-Modal Data to Examine Equity in Activity-Monitor Gaming Within Real-World Communities." In Global Perspectives on Gameful and Playful Teaching and Learning, 118–42. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2015-4.ch006.
Full textAbstract:
It is rare for research on augmented-reality games to examine equity and access as grounded in features of the actual neighborhoods where game play takes place, and in the affordances of communities and their built environments for gamified ambulatory physical activity in the real world. This chapter studies two diverse groups of middle-school youth, situated in urban and suburban areas, who wore activity monitors as they went through daily activities and played an online game that synced with their monitors. The game drew data from the wearable devices so that the more youth engaged in step-countable physical activity in the real world, the more game-world energy they earned. This chapter analyzes the actual communities where our participants' activity and game play was situated. The chapter lays out the multi-modal data sources in that analysis and provides some potential models that can be employed by others in related work. Finally, the chapter closes by articulating some directions and concerns for future research in a gamified physical world.
5
Knoper, Randall. "Vitality, Racial Creativity, and Biopolitics." In Literary Neurophysiology, 81–117. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780192845504.003.0004.
Full textAbstract:
In a materialist vitalism that emerged, nerve force as a physical energy was assumed to give idiosyncratic shape to organisms, races, and species. Borrowing from evolutionary theory and biometrics, Oliver Wendell Holmes suggests in Elsie Venner that the vital force of the average members of a race or species will prevail, while hybrids at the edges of the vital bell curve will expire, a principle that applies as well to literature, which has its own vital curve. William Dean Howells promotes a naturalized realism of the healthy, national (white, middle-class) average. W. E. B. Du Bois and Pauline Hopkins take on the task of establishing the African American race as vigorous and empowered rather than enervated—and of eluding constraining racial definition by oscillating between biological and immaterial conceptions of racial force.
6
Zambernardi, Lorenzo. "Bare Death." In Life, Death, and the Western Way of War, 43–70. Oxford University Press, 2022. http://dx.doi.org/10.1093/oso/9780192858245.003.0003.
Full textAbstract:
Chapter 2 investigates the meaning of soldier deaths in early modern Europe. This first episode of the story, until the middle of the nineteenth century, is relatively uncomplicated: soldier deaths were considered natural occurrences that aroused no political or ethical sentiments. The main military tactics of the period will be outlined, emphasizing that the main purpose of battlefield tactics was to overpower enemy forces regardless of human costs. Considerations concerning casualties certainly played a role in warfare, but solely in terms of combat power. In addition, the chapter shows that in this historical period a soldier’s death was regarded as a purely physical event, without any political or social effects: it was nothing but bare death. This attitude is clearly visible in disposal and commemorative functions. Before the mid-nineteenth century, in fact, the corpses of the war dead were unceremoniously interred either in unmarked burials or, most often, in shallow mass graves. Likewise, in that period the contribution of the common soldier in war was not part of commemorative practices.
7
Anderson, Greg M., and David A. Crerar. "Mathematical Background." In Thermodynamics in Geochemistry. Oxford University Press, 1993. http://dx.doi.org/10.1093/oso/9780195064643.003.0006.
Full textAbstract:
Thermodynamics, like other sciences, has a theoretical side, expressed in mathematical language, and a practical side, in which experiments are performed to produce the physical data required and interpreted by the theoretical side. The mathematical side of thermodynamics is simple and elegant and is easily derived from first principles. This might lead to the conclusion that thermodynamics is a simple subject, one that can be easily absorbed early in one's education before going on to more challenging and interesting topics. This is true, if by learning thermodynamics one means learning to manipulate its equations and variables and showing their interrelationships. But for most students the subject is actually far from simple, and for professors it is a considerable challenge to present the necessary material intelligibly. The equations and the variables are somehow related to the real world of beakers and solutions, fuels and engines, rocks and minerals, and it is this interface that provides most of the difficulties. What do variables such as entropy and free energy really mean, and what physical processes do the equations describe? The difficulty in understanding and using thermodynamics is conceptual, not mathematical. We will attempt to explain the relationship between the mathematical and the physical sides of thermodynamics, but it is advisable first to review the mathematics involved and subsequently to define the terms used in thermodynamics. The mathematics required for thermodynamics consists for the most part of nothing more complex than differential and integral calculus. However, several aspects of the subject can be presented in various ways that are either more or less mathematically based, and the "best" way for various individuals depends on their mathematical background. The more mathematical treatments are elegant, concise, and satisfying to some people, and too abstract and divorced from reality for others. In this book we attempt to steer a middle-of-the-road course. We review in the first part of this chapter those aspects of mathematics that are absolutely essential to an understanding of thermodynamics. The chapter closes with mathematical topics that, although not essential, do help in understanding certain aspects of thermodynamics.
8
Halligan, Sarah L. "Neurobiological outcomes in the offspring of postnatally depressed mothers: Causes and consequences." In Perinatal Psychiatry. Oxford University Press, 2014. http://dx.doi.org/10.1093/oso/9780199676859.003.0019.
Full textAbstract:
Postnatal depression (PND) is the most common psychological disorder to affect women in the postpartum period, with an estimated prevalence of 13% in high-income countries (Gavin et al. 2005; O’Hara and Swain 1996). In low and middle income countries, the available evidence suggests that rates of PND may be substantially higher, with prevalence estimates ranging from 15 to 57% (Wachs et al. 2009). In terms of clinical presentation, depression occurring in the postnatal period appears to be indistinguishable from depression occurring at other times (Cooper et al., 2007), with persistent low mood and/or a profound loss of interest and enjoyment being defining characteristics. Other symptoms are mood-related disturbances in sleep, altered appetite, concentration impairment, retardation, agitation, feelings of guilt and hopelessness, and suicidal thoughts or impulses. The duration of episodes varies, but the majority of postpartum depressive episodes resolve spontaneously within 6 months to a year (Cooper and Murray 1995; Cox et al. 1993). Although PND may not be unique in terms of the symptom profile, the fact that this disorder occurs in the postpartum period is a particular concern. Specifically, PND affects the mother–infant dyad at a time when the infant is particularly reliant on his or her caregiver to meet their physical, social, and cognitive needs. The postpartum period is also a time when the family unit as a whole is likely to experience additional stress, and is therefore particularly vulnerable. Given these considerations, and the relatively high prevalence of PND, the potential for adverse impact is significant. One area of research focus, reviewed here, has examined the possibility the disturbances in the mother–child relationship occurring in the context of maternal PND result in fundamental alterations in key psychobiological systems in the infant, with persistent consequences. Notably, as PND typically resolves within the first year postpartum, and therefore is particularly relevant to early development, observations deriving from the study of PND in this area offer potentially broad insights into the relevance of early environmental factors to child neurobiological functioning. Given that depressive disorder is characterized by profound impairments in mood, energy levels, motivation, and feelings of self-worth, and has established detrimental effects on interpersonal functioning, it is perhaps unsurprising that mothers with PND have been found to show disturbances in the quality of care that they provide for their infant (for a review, see Murray et al. 2010a).
Conference papers on the topic "Middle energy physics"
1
Scherr, Rachel E., Amy D. Robertson, Lane Seeley, and Stamatis Vokos. "Content Knowledge for Teaching Energy: An Example From Middle-School Physical Science." In 2013 Physics Education Research Conference. American Association of Physics Teachers, 2014. http://dx.doi.org/10.1119/perc.2013.pr.068.
Full text
2
Wittmann, Michael C., Adam Z. Rogers, Carolina Alvarado, Joshua Medina, and Laura A. Millay. "Using multiple survey questions about energy to uncover elements of middle school student reasoning." In 2017 Physics Education Research Conference. American Association of Physics Teachers, 2018. http://dx.doi.org/10.1119/perc.2017.pr.105.
Full text
3
Kirillov, A. S., R. Werner, and V. Guineva. "The simulation of vibrational populations of electronically excited N2and O2molecules in the middle atmosphere of the Earth during precipitations of high-energetic particles." In Physics of Auroral Phenomena. FRC KSC RAS, 2020. http://dx.doi.org/10.37614/2588-0039.2020.43.037.
Full textAbstract:
We study the electronic kinetics of molecular nitrogen and molecular oxygen in the middle atmosphere of the Earth during precipitations of high-energetic protons and electrons.The role of molecular inelastic collisions in intermolecularelectron energy transfer processes is investigated.It is shown that inelastic molecular collisions influence on vibrational populations of electronically excited molecular oxygen. It is pointed out on very important role of the collisions of N2(A3u+) with O2molecules on the electronic excitation of Herzberg states of molecular oxygenat the altitudes of the middle atmosphere.
4
Dashkevich, Zh V., B. V. Kozelov, A. G. Demekhov, Y. Miyoshi, S. Kasahara, S. Yokota, A. Matsuoka, et al. "Evolution of the energetic electron flux observed by ARASE satellite and simultaneous aurora in the case of March 31, 2017, 00-01 UT." In Physics of Auroral Phenomena. FRC KSC RAS, 2020. http://dx.doi.org/10.37614/2588-0039.2020.43.022.
Full textAbstract:
The data of simultaneous observation of the energetic electron flux by ARASE satellite and aurora by ground-based all-sky imager in Murmansk region (Russia) have been analyzed for the time interval 00:00-01:00 UT on March 31, 2017. The energy spectra of middle-energy (7-90 keV) electrons observed by MEPe detectors in and near the loss cone have been used for simulation of the auroral emissions in the atmosphere. The temporal evolution of the simulated emission intensity has been compared with the observed emission in the magnetic field-aligned footprint point for the satellite. It was found that the projection along magnetic field has been distorted by the developing disturbance.
5
Batarseh, Sameeh, Damian Pablo San Roman Alerigi, and Abdullah Al Harith. "Key Success Factor for High Power Laser Deployment: Strategy and Execution." In Middle East Oil, Gas and Geosciences Show. SPE, 2023. http://dx.doi.org/10.2118/213438-ms.
Full textAbstract:
Abstract This paper presents the strategy and execution that led to the industry's first successful deployment of a high-power laser in the field. The development encompassed various aspects: administration, technical, lab-to-field transformation, and intensive research. One of the primary success factors was identifying potential technologies and forecasting their evolution. High-power lasers were selected for the upstream applications because of their capabilities and successful use in almost every industry, ranging from medical to the military; it attracted the industry due to its unique features, such as precision, reliability, control, and accuracy. High-power lasers at the early stage (generation) were not applicable for downhole applications due to their relatively lower power levels. However, it has been utilized widely in several applications, such as sensing, measurements, and others. The objective of this program is to utilize the new generations of higher-power lasers in several upstream applications. The program is strategically designed to reduce the risk and increase success. In the initial stage, the work focused on the feasibility and characterization of intervening physics. The goal was to answer fundamental technical questions, such as "can lasers penetrate all types of rocks? What are the limitations? What is the effect of the laser on rocks?" The research spanned the last two decades, culminating in the development of the first field prototype of a high-power laser system. The work proved that near-infrared multi-kilowatt lasers (hereon high-power lasers or HPL) could perforate and process any rock type at different conditions, including in-situ testing and liquid environments. The experimental plan was designed systematically and divided into phases, starting from fundamentals to advance. Prototype tools were designed, tested, and upscale for field deployment. All applications can be performed with the same HPL source -only the optical head needs to be changed. High-power laser technology is an alternative to conventional methods of subsurface energy extraction, such as perforation, descaling, and drilling. It is cost-effective, compact, versatile, waterless, energy-efficient, and environmentally friendly, thus enabling sustainable field operations.
6
Slavens, S., L. Gonzalez, Y. Shen, A. Johnson, O. Gjertsen, E. Richards, W. Chen, et al. "Development and Deployment of a High- Frequency Torsional Vibration Suppressor Based on Downhole Measurements and Scientific Modeling." In SPE/IADC Middle East Drilling Technology Conference and Exhibition. SPE, 2023. http://dx.doi.org/10.2118/214609-ms.
Full textAbstract:
Abstract High-frequency torsional oscillation (HFTO), a highly destructive drilling vibration mode, causes severe fatigue damage to drilling tools. Recent industry discoveries suggest techniques for reducing HFTO through adjustments of drilling parameters; however, these techniques normally result in detrimental effect on rate of penetration (ROP) or equipment operated out of specifications. Deeper understanding of this dysfunction resulted in the development of a special HFTO dampening tool to lessen the dysfunction without limiting the drilling parameters needed to maximize performance. Drilling dynamics measurements were obtained from high-frequency logging tools placed at strategic positions in motorized and standalone rotary steering system (RSS) bottomhole assemblies (BHA). The data obtained from these measurements were analyzed to better understand HFTO characteristics in multiple geological environments. A transient drilling dynamics model was then built to reproduce HFTO motion and help understand the loading conditions under this vibration mode. This information was used to define the best technology and components’ characteristics for the design of the dampening tool to effectively lessen HFTO over a wide frequency range. The transient model was later upgraded to include the physics principle and technical specifications of the dampening tool so that the operational results could be scientifically validated. High-frequency signals capturing variations of revolutions per minute (RPM), axial and tangential acceleration, torque, axial loading, and internal pressure have been used to characterize HFTO, either directly or indirectly. Crossplots of the signals from the HFTO cycles showed intriguing patterns of phase shifts between the signals. Torsional strain and displacements are distributed along the BHA based on HFTO mode shapes, which can be predicted by the transient drilling dynamics model. Excessive torsional strain and kinetic energy caused by the HFTO are mostly restrained at the lower BHA, especially in motorized RSS applications with the motor acting as a reflector. Vibration isolation is a valid strategy to minimize its destructive impact on BHA tools. Nevertheless, not all components can be placed above an isolator due to BHA design constraints. A dampening tool has been designed and optimized to operate as standalone or combined with isolators to alleviate HFTO over a wide frequency range. Guided by modeling, one or multiple tools can be placed immediately below a mud motor for a motorized BHA or at selected locations with maximum RPM variation for rotary BHAs. After multiple field tests, the tool consistently delivers lower HFTO magnitudes than offsets. Significant performance gains were achieved as the operating parameter ranges were extended. In this paper, additional insights into HFTO characteristics and their effect on drilling systems are presented. A modeling procedure has been developed to predict the most likely HFTO modes and help design BHAs and drilling tools. A robust dampening tool has been developed and field tested to effectively diminish HFTO and improve drilling performance.
7
Ashayeri, Cyrus, and Birendra Jha. "Assessment of Unconventional Resources Opportunities in the Middle East Tethyan Petroleum System in a Transfer Learning Context." In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207723-ms.
Full textAbstract:
Abstract Decision making in new fields with little data available relies heavily on physics-based simulation models. However, due to a lack of full understanding of the physical processes governing flow in the unconventional resources, data-driven modeling has emerged as an alternative and complimentary tool to create recovery forecasts that honor the available data. Transfer Learning provides an opportunity to start early-stage analysis of the asset before adequate data becomes available. New challenges in the energy industry as well as shifting dynamics in both domestic and global supply and demand has encouraged some of the petroleum exporting countries in the Middle East to strategize the development of unconventional resources. In this research we have developed a data-driven Transfer Learning framework that allows the basin-wide assessment of new shale gas and tight oil prospects. The proposed Transfer Learning method is developed on real-world data from several thousand horizontal multistage wells in the Eagle Ford super-basin in South Texas. In this method we have integrated reservoir engineering domain expertise in the data pre-processing and feature generation steps. We have also considered the temporal and spatial balancing of the training data to assure that the predictive models honor the real practice of unconventional field development. Our full cycle Transfer Learning workflow consists of dimensionality reduction and unsupervised clustering, supervised learning, and hyperparameter fine-tuning. This workflow enables reservoir engineers to experiment with multiple hypothetical scenarios and observe the impact of additional data in the learning process. We use the developed workflow to examine the performance of a data-driven model of the Eagle Ford Basin on potential plays in the Middle East. Existence of all liquid types of oil, condensate and dry gas in the Eagle Ford has resulted in training a model flexible enough to be tested on various types of assets in a new location. We first present the successful deployment of our model within the Eagle Ford. Next, we use the information from major formations such as Tuwaiq Mountain and Hanifa and show the value of a pre-existing model from a fully-developed shale play on achieving acceptable accuracies with minimal information available in a new field. Our model is developed by data types with relatively low resolution that minimizes overfitting effects and allows generalization to different geologies with basin-wide accuracy. This approach allows conducting accelerated assessment of various sections of a large asset to enhance field development planning processes. This is a first example of such an effort on a basin scale that examines the effectiveness of Transfer Learning on some of the major unconventional plays in the Middle East region. This workflow allows investigating the relationship among geologic and petrophysical variables, drilling and completion parameters, and productivity of a large group of wells in a new asset.
8
Omer, Mohammed, Tosin Odunlami, and Carlos Iturrious. "Geomechanics in Partnership – A Holistic Approach to Solving Drilling Challenges." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206211-ms.
Full textAbstract:
Abstract With rising energy demand, operators in the Middle East are now focusing on developing unconventional resources. To optimize hydraulic fracture stimulation, most of these deep gas wells are required to be drilled laterally and in the direction of the minimum horizontal stress. However, this poses an increased risk of stuck pipe due to hole instability, differential sticking and skin damage due to high overbalance pressures, which makes drilling these wells challenging and costly. Another major challenge in the Middle East is lost circulation due to natural fractures in carbonate reservoirs. Lost circulation currently accounts for loss of approximately $850-900 million USD per year globally across the industry (Marinescu 2014). This paper presents a case study where a holistic approach; combining geomechanics and drilling technologies were employed to address the drilling challenges specific to unconventional and naturally fractured reservoirs. Ultimately, this approach helped the client to mitigate stuck pipe issues, while proposing a physics/engineering-basedmethodology to reduce losses by sealing fractures, hence providing a roadmap to optimized drilling and mitigation of hazards with associated Non-Productive Time (NPT). The paper demonstrates a holistic approach, combining wellbore stability analysis, managed pressure drilling (MPD) and proposes a novel physics/engineering-based methodology for addressing lost circulation challenges. A 1-D wellbore stability model is initially developed to determine the safe operating downhole pressure limits and to effectively assess the drilling risks associated with the planned wellbore orientation. By accurately determining the required bottomhole pressure to prevent wellbore stability problems, managed pressure drilling technology can be implemented to provide improved drilling hazard mitigation by enabling reduced overbalance pressures, constant bottomhole pressure, and faster reaction time by instantaneously adjusting downhole pressures. A bi-particulate bio-degradable system is used as a lost circulation material (LCM). The bigger size cylindrical particles flowing at a pre-defined rate will form a bridge or a plug across the fracture aperture, providing mechanical stability and the smaller spherical particles will seal the gaps in the bridge there by providing an effective sealing of the fracture opening. From experience, implementing these methodologies and technologies in isolation has not provided satisfactory results. This indicates that a partnership which leverages the strengths of the individual disciplines from the early planning stages is necessary to effectively address the drilling challenges posed by unconventional and naturally fractured reservoirs. For the case study highlighted in this paper, the well was drilled to TD in a timely manner, while maintaining the integrity of the hole, hence confirming the viability of this approach. In addition, the physics and engineering design workflow for bi-particulate bio-degradable LCM demonstrates how it can be effectively deployed to mitigate lost circulation without skin damage to the formation
9
Alharith, Abdullah, Sameeh Batarseh, and Damian San Roman Alerigi. "High Power Laser Technology Toward the Downhole Applications: The Effect on Permeability." In Middle East Oil, Gas and Geosciences Show. SPE, 2023. http://dx.doi.org/10.2118/213948-ms.
Full textAbstract:
Abstract In response to the high oil and gas demand, new sustainable technologies were developed and evolved to improve the production. Among those new technologies is the high power laser technology. Laser technology attracted the industry due to its unique properties and the potential to revolutionize the oil and gas industry in many applications. Such applications include; drilling, perforation, descaling, pipe cutting, casing-casing annulus remedy, and fracture initiation. This paper will discuss the effect of high power laser operations on the permeability during the utilization of this method for oil and gas applications. The interaction between the high power laser and the formation induces high thermal energy to the geological structure of the reservoir that will influence the permeability of the formation. Different types of experimental work examine the consequences of high power laser on permeability. Several research studies are conducted on different rock samples; the samples include carbonate, sandstone, and shale. The high power laser induces thermal energy, which affects the physical structure of the rock sample by altering the physical and chemical properties of the rock. Such changes include decomposition reaction, dehydration, clays collapse, and micro-cracking. Various lab techniques are used for analysis and characterization, including thermogravimetric analyzer (TGA), and permeability measuring machine. The lab work showed improvement in permeability in most rock samples that are treated with high power laser energy. High power laser technology is a friendly environmental method for downhole oil and gas applications. The paper demonstrated that the technology is non-damaging and enhances the flow properties in the well. Improving the production by enhancing the permeability.
10
Mohammed, Osama A. "Keynote lecture III: Energy cyber physical systems and their communication and control challenges for operational security in power systems." In 2017 Nineteenth International Middle East Power Systems Conference (MEPCON). IEEE, 2017. http://dx.doi.org/10.1109/mepcon.2017.8301150.
Full textReports on the topic "Middle energy physics"
1
Groeneveld, Andrew, and C. Crane. Advanced cementitious materials for blast protection. Engineer Research and Development Center (U.S.), April 2023. http://dx.doi.org/10.21079/11681/46893.
Full textAbstract:
Advanced cementitious materials, commonly referred to as ultra-high performance concretes (UHPCs), are developing rapidly and show promise for civil infrastructure and protective construction applications. Structures exposed to blasts experience strain rates on the order of 102 s-1 or more. While a great deal of research has been published on the durability and the static properties of UHPC, there is less information on its dynamic properties. The purpose of this report is to (1) compile existing dynamic property data—including compressive strength, tensile strength, elastic modulus, and energy absorption—for six proprietary and research UHPCs and (2) implement a single-degree-of-freedom (SDOF) model for axisymmetric UHPC panels under blast loading as a means of comparing the UHPCs. Although simplified, the model allows identification of key material properties and promising materials for physical testing. Model results indicate that tensile strength has the greatest effect on panel deflection, with unit weight and elastic modulus having a moderate effect. CEMTECmultiscale® deflected least in the simulation. Lafarge Ductal®, a commonly available UHPC in North America, performed in the middle of the five UHPCs considered.