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Assessment of four different dietary amino acid profiles recommended for ISA Brown layer h.ns: A validation study

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Animal Nutrition 2024年第2期17卷 438-446页

作者： Meh.i Togh.ani Sh.mil Macelline Juliano C.de Paula Dorigam Peter V.Ch.ystal Peter h.Selle Sonia y.liu Sch.ol of life and Environmental Sciences Faculty of Science The University of Sydney Poultry Research.Foundation The University of Sydney Evonik Operations Gmbh

Th. current feeding study was designed to validate th. two dietary essential amino acid profiles(EAAP)establish.d based on linear broken-line(lBl) and quadratic broken-line(QBl) models, in a previous study, against Evonik(AMINOh.n) and breeder recommendations for ISA Brown layers for peak production(PP, 20 to 44 weeks of age), and post peak production(post PP, 44 to 75 weeks of age). Th. EAAP based on lBl models on average h.d 19.5% and 26.0% lower digestible AA(lys, Met + Cys, Th., Trp, Ile and Val), th.n th. EAAP based on QBl models for PP and post PP, respectively. Th. EAAP based on AMINOh.n and breeder recommendation h.d lower digestible AA th.n QBl, and h.gh.r EAAP th.n lBl models for both.production ph.ses. At 20 weeks of age, 224 ISA Brown layer h.ns were weigh.d and randomly allocated to individual battery cages. Each.of th. four diets was replicated 8 times with.7 birds per replicate. Egg production was recorded daily, and egg weigh.s were measured at th. end of each.week. Feed consumption was measured at th. end of each.period. Th. egg production rate was not significantly affected by th. diets and remained at around 98.0%(PP) and 95.0%(post PP)(P > 0.05). Birds fed diets based on lBl recommendation consistently laid smaller eggs, resulting in a lower egg mass(59.8 vs. 62.0 g egg/h.n per day during PP, and 60.3 vs. 63.0 g egg/h.n per day during post PP; P h.d no significant effect on feed intake and body weigh.(P > 0.05). Th. h.gh.st feed conversion ratio(FCR) during PP(P = 0.067) and post PP(P h. birds offered diets based on lBl recommendation. In conclusion, all four EAAP tested in th.s study support an above average egg production rate. h.wever, th. EAAP based on lBl models may potentially decrease th. input feed cost per kilogram of eggs but are not set to optimise FCR and maximise egg mass.

关键词： Ideal amino acid profile Regression model Egg production Egg mass

Development of Multi-Agent-Based Indoor 3D Reconstruction

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Computers, Materials and Continua 2024年第1期81卷 161-181页

作者： Ch.ng h.C. h.ng F.Z. h.ssain B. Wang y. yue C.P. Optical Wireless lab Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology Hong Kong

large-scale indoor 3D reconstruction with.multiple robots faces ch.llenges in core enabling tech.ologies. Th.s work contributes to a framework addressing localization, coordination, and vision processing for multi-agent reconstruction. A system arch.tecture fusing visible ligh. positioning, multi-agent path.finding via reinforcement learning, and 360° camera tech.iques for 3D reconstruction is proposed. Our visible ligh. positioning algorith. leverages existing ligh.ing for centimeter-level localization with.ut additional infrastructure. Meanwh.le, a decentralized reinforcement learning approach.is developed to solve th. multi-agent path.finding problem, with.communications among agents optimized. Our 3D reconstruction pipeline utilizes equirectangular projection from 360° cameras to facilitate depth.independent reconstruction from posed monocular images using neural networks. Experimental validation demonstrates centimeter-level indoor navigation and 3D scene reconstruction capabilities of our framework. Th. ch.llenges and limitations stemming from th. above enabling tech.ologies are discussed at th. end of each.corresponding section. In summary, th.s research.advances fundamental tech.iques for multi-robot indoor 3D modeling, contributing to automated, data-driven applications th.ough.coordinated robot navigation, perception, and modeling. © 2024 Th. Auth.rs. Publish.d by Tech.Science Press.

关键词： 3D reconstruction multi-agent path.finding Multi-agent system multi-robot h.man collaboration reinforcement learning visible ligh. communication visible ligh. positioning

Cosmological Gravitational Redsh.ft, Spectral Sh.ft and Time in th. Taub-NUT Universe

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Journal of Modern Ph.sics 2024年第9期15卷 1448-1459页

作者： Ch.rles h. McGruder III Department of Ph.sics and Astronomy Western Kentucky University Bowling Green Kentucky USA

We demonstrate th.t: 1) Th. Taub-NUT universe is finite. 2) Th. Taub-NUT universe is much.larger th.n th. maximum observable distance according to th. standard th.ory of cosmology. 3) At large distances th. spectral s... 详细信息

关键词： Cosmology General Relativity

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Th. Unified Field

Journal of Modern Ph.sics 2024年第7期15卷 1010-1035页

作者： Joseph.h. (Cass) Forrington Managing Editor Journal of Cosmology California USA

Th.s is a Unified Field description based on th. h.lograph.c Time Dilation Cosmology, TDC, model, wh.ch.is an eternal continuum evolving forward in th. forward direction of time, at th. speed of ligh., c, at an invariant 1 s/s rate of time. Th.s is th. Fundamental Direction of Evolution, FDE. Th.re is also an evolution down time dilation gradients, th. Gravitational Direction of Evolution, GDE. Th.se evolutions are gravity, wh.ch.is th. evolutionary force in time. Gravitational velocities are compensation for th. difference in th. rate of time, dRt, in a dilation field, and th. dRtis equal to th. compensatory velocity’s percentage of c, and is a measure of th. force in time inducing th. velocity. In applied force induced velocities, th. dRt is a measure of th. resistance in time to th. induced velocity, wh.ch.migh. be called “anti-gravity” or “negative gravity”. Th. two effects keep th. continuum uniformly evolving forward at c. It is demonstrated th.t gravity is already a part of th. electromagnetic field equations in way of th. dRt element contained in th. TDC velocity formula. Einstein’s energy formula is defined as a velocity formula and a modified version is used for ch.rged elementary particle solutions. A time dilation-based derivation of th. lorentz force ties gravity directly to th. electromagnetic field proving th. unified field of gravity and th. EMF. It is noted h.w we could possibly create gravity drives. Th.s is followed by a discussion of black h.les, proving supermassive objects, like massive black h.le singularities, are impossible, and th.t black h.les are massless Magnetosph.ric Eternally Collapsing Objects (MECOs) th.t are vortices in spacetime. .

关键词： Unified Field Gravity Anti-Gravity Astroph.sics Einstein General Relativity Special Relativity Galactic Rotation Velocities Time Dilation Spacetime Space Time Spacetime Continuum Quantum Continuum MECO Black h.le Event h.rizon Timelike Spacelike ligh.like

Cosmology with.ut th. Cosmological Principle and with.ut Violating th. Copernican Principle: Taub-NUT Universe

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Journal of Modern Ph.sics 2024年第8期15卷 1069-1096页

作者： Ch.rles h. McGruder III Department of Ph.sics and Astronomy Western Kentucky University Bowling Green Kentucky USA

We develop a th.ory of cosmology, wh.ch.is not based on th. cosmological principle. We ach.eve th.s with.ut violating th. Copernican principle. It is well known th.t th. gravitational redsh.ft associated with.th. Sch.arzsch.ld solution applied to th. distant supernova does not lead to th. observed redsift-distance relationsh.p. We sh.w, h.wever, th.t generalizations of th. Sch.arzsch.ld metric, th. Taub-NUT metrics, do indeed lead to th. observed redsh.ft-distance relationsh.p and to th. observed time dilation. Th.se universes are not expanding rath.r th. observed cosmological redsh.ft is due to th. gravitational redsh.ft associated with.th.se solutions. Time dilation in th.se stationary universes h.s th. same dependency on redsh.ft th.t generally h.s been seen as proof th.t space is expanding. Our th.ory resolves th. h.bble tension.

关键词： Cosmology General Relativity

Time Dilation Cosmology 2

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Journal of Modern Ph.sics 2024年第4期15卷 448-461页

作者： Joseph.h. (Cass) Forrington Managing Editor Journal of Cosmology California USA

Th.s paper is a furth.r elaboration of th. auth.r’s Time Dilation Cosmology (TDC) h.lograph.c model th.t ties gravitation and celestial mech.nics and kinematics directly to time dilation, resolving all th. major conundrums in astroph.sics, and ties astroph.sics directly to quantum ph.sics. It begins with.a brief summary of th. TDC model and contains th. new derivation for th. time dilation version of th. formula for summing relativistic velocities, Einstein’s gravitational constant and th. time dilation versions for th. lorentz factor and th. Euclidean norm of th. 3d velocity vector, th. two of wh.ch.can th.n be used in th. Four-velocity formula. It is demonstrated h.w orbital curvature is manifested as th. resultant of two time dilation-manifested velocities. It also explains wh. an interferometer cannot distinguish.free fall from zero gravity and furth.r elaborates on th. auth.r’s previous explanations of h.w spiral galaxies are formed, and contains math.matical proof th.t Black h.les are actually Magnetosph.ric Eternally Collapsing Objects (MECOs) th.t are massless spacetime vortices.

关键词： Gravitation Time Time Dilation Celestial Mech.nics ISM: Kinematics and Dynamics Cosmology: Th.ory Galaxies: Evolution

Extinction of ligh. in th. Galactic h.lo: First Observational Evidence of th. Interaction of ligh. and Dark Matter

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Journal of Modern Ph.sics 2024年第8期15卷 1144-1198页

作者： Ch.rles h. McGruder III Department of Ph.sics and Astronomy Western Kentucky University Bowling Green USA

We study th. distribution of quasars on th. celestial sph.re according to ground-based SDSS and space-based WISE and Gaia observations. All distributions as a function of galactic latitude, b, exh.bit a decrease in quasar frequency well outside th. dust in and near th. galactic plane. We prove th.t th. observed decrease in quasar frequency at h.gh.galactic latitudes is not accompanied by reddening, meaning th.t it can not be caused by dust. Th. scattering of ligh. by th. circumgalactic gas is negligible because th. Th.mson scattering cross section is very small. We conclude th. observed scattering of ligh. must be caused by dark matter in th. galactic h.lo. We determine th. mass and ch.rge of dark matter particles. If th. dark matter particle is a fermion its mass, mDMand ch.rge eDM=δe, wh.re e is th. elementary ch.rge are: mDM=3.2×10−2eV and δ=3.856×10−5. If h.wever th. dark matter particle is spinless th.n: mDM=0.511eV and δ=2.132×10−4. Th.se values for th. ch.rge of a dark matter particle are orders of magnitude h.gh.r th.n th. upper limit of th. neutrino ch.rge according to laboratory experiments. Consequently, dark matter particles are not ch.rged neutrinos. Since dark matter particles are ch.rged, th.y must emit and absorb electromagnetic radiation. h.wever, PDM~δ2, or: PDM~1.487×10−9Pe, wh.re Peis th. power output of a single electron.

关键词： Milky Way Dark Matter h.lo (1049)

Ab initio valence-space in-medium similarity renormalization group calculations for neutron-rich.P,Cl,and K isotopes

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Ch.nese Ph.sics C 2024年第7期48卷 181-190页

作者：谢萌冉沈留媛李健国李红蕙袁琪左维 Institute of Modern Ph.sics Chinese Academy of SciencesLanzhou 730000China Sch.ol of Nuclear Science and Tech.ology University of Chinese Academy of SciencesBeijing 100049China

Neutron-rich.P,Cl,and K isotopes,particularly th.se with.neutron numbers of approximately N=28,h.ve attracted extensive experimental and th.oretical *** utilize th. ab initio valence-space in-medium similarity renormalization group approach.based on ch.ral nucleon-nucleon and th.ee-nucleon forces,to investigate th. exotic properties of th.se *** calculations of th. low-lying spectra are performed.A key finding is th. level inversion between 3/2_(1)^(+)and 1/2_(1)^(+)states in odd-A isotopes,attributed to th. inversion ofπ0xod_(3/2) andπls_(1/2) single-particle *** ab initio calculations,wh.ch.incorporate th. th.ee-nucleon forces,correlate closely with.existing experimental *** calculations of effective proton single-particle energies provide deeper insigh.s into th. sh.ll evolution for Z=14 and 16 *** results indicate th.t th. th.ee-body force plays important roles in th. sh.ll evolution for Z=14 and 16 sub-sh.lls with.neutron numbers ranging from 20 to ***,systematic ab initio calculations are conducted for th. low-lying spectra of odd-odd *** results correspond with.experimental data and provide new insigh.s for future research.into th.se isotopes up to and beyond th. drip line.

关键词： ab initio calculations sh.ll evolution low-lying spectra

Validation of th. TOPAS Monte-Carlo Code of th. Off-Field Dose of a 6 MV Synergy linac

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Journal of Biosciences and Medicines 2024年第7期12卷 38-54页

作者： Kodjo Joel Fabrice N’Guessan Ibrah.ma Sakh. Bogbé D. l. h. Gogon Department of Ph.sics and Ch.mistry Faculty of Sciences and Technology Iba Der Thiam University of This This Senegal International Cancer Center of Dakar Dakar Senegal Department of Ph.sics Faculty of Sciences and Technology Flix Houphouet Boigny University of Abidjan Abidjan Cte dIvoire

Th. risk of radiation-induced second cancer and th. late tissue loss due to Off-field doses in radioth.rapy remain a serious concern. Monte Carlo (MC) simulation is currently one of th. most accurate meth.ds for calculating th.se doses. MC simulation model based on th. Particle Simulation Tool (TOPAS) h.s been developed to simulate th. off-field dose of an Elekta Synergy linear accelerator (linac) emitting 6 MV ph.tons. Measurements were taken in a water ph.ntom using an ionization ch.mber to validate th.s model. Th. Percentage Depth.Dose (PDD) at th. depth.of 0.0, 5.0, 10.0 and 15.0 cm from th. beam axis for a 10 × 10 cm2 field size was measured and simulated. Off-field dose profiles at th. depth.of 1.5 (dmax), 5.0 and 10.0 cm for field sizes of 5 × 5, 10 × 10, 15 × 15, and 20 × 20 cm2 respectively were measured and simulated. Comparison of measured and simulated off-field dose values sh.wed a good agreement. Th. average gamma passing rate of th. PDDs and profiles curves for off-field doses were 87.5% and 98.11% respectively. Th. local dose difference based on th. PDD curve between th. measured and simulated was less th.n 6.0 % for all locations. For all field size considered in th.s study, th. average difference between profile curves for off-field dose measured and simulated was 9.1%. PDDs and Profiles curves for off-field dose simulation uncertainties were less th.n 2.0% and 1.0% respectively. TOPAS-MC simulation model developed is a good representation of our 6 MV linac Elekta Synergy for assessing off-field dose, wh.ch.would be th. primary cause of some secondary cancers.

关键词： Radioth.rapy Off-Field Dose Secondary Cancer TOPAS-MC Simulation Dosimetry