cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Wi-Fi Based Occupancy Estimation for Optimized Operation of HVAC systems
Creators: name: Shreekar
name: Mahbubul
name: Arham
name: Nahian, Al
name: Duminda
name: , Zoran
Publisher: name: Journal of Student-Scientists' Research
Year: 2022

description: Occupancy information of a building can be utilized to optimize the operation of HVAC systems and to allocate resources in case of emergency. The occupancy of a building can be estimated using dedicated occupancy detection sensors like CO2 sensors, cameras, and existing data from WiFi access points. The primary shortcoming of the sensor-based approach is that additional infrastructure would have to be built to support the sensors' power delivery and data connection. Alternatively, with Wifi AP detection, no additional infrastructure would be needed as the building would already have Wifi APs installed, therefore lowering the initial cost of these detection systems. Furthermore, most sensors do not have as wide a range of coverage as Wifi APs, and multiple sensors might be needed to cover the same region as one Wifi AP. Moreover, there has been a greater concern with privacy in recent years; therefore, analyzing occupancy using camera systems might cause concerns with some individuals. In this digital age, almost everyone carries a phone or computer on their person, and their presence can be detected by the Wifi APs without any user interaction. And because buildings are already outfitted with Wifi APs, extra equipment and setup aren't required to track occupancy, and analysis can be run with a lower initial cost. For these above reasons, integration of Wifi AP-based occupancy detection would be the most effective and seamless method. We use delayed Wifi logs from the APs, including device identifiers, signal strength, and various other pieces of data. From these logs, data is picked out to be used to analyze the occupancy of a given location in the building. Pre-trained machine learning models are fed data from these logs, and occupancy prediction decisions are made, which can be utilized in optimizing the operation of HVAC systems.
description: Journal of Student-Scientists' Research, Vol. 4 (2022)
On minors of maximal determinant matrices
Creators: name: Brent, Richard P.
name: Osborn, Judy-anne H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05B20 (Primary) 15B34, 62K05 (Secondary)

description: By an old result of Cohn (1965), a Hadamard matrix of order n has no proper Hadamard submatrices of order m > n/2. We generalise this result to maximal determinant submatrices of Hadamard matrices, and show that an interval of length asymptotically equal to n/2 is excluded from the allowable orders. We make a conjecture regarding a lower bound for sums of squares of minors of maximal determinant matrices, and give evidence in support of the conjecture. We give tables of the values taken by the minors of all maximal determinant matrices of orders up to and including 21 and make some observations on the data. Finally, we describe the algorithms that were used to compute the tables.
description: 35 pages, 43 tables, added reference to Cohn in v3
Distance of PSR B0458+46 indicated by FAST HI absorption observations
Creators: name: Jing, W. C.
name: Han, J. L.
name: Hong, Tao
name: Wang, Chen
name: Gao, X. Y.
name: Hou, L. G.
name: Zhou, D. J.
name: Xu, J.
name: Yang, Z. L.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The pulsar B0458+46 was previously believed to have a distance of about 1.3$~$kpc and to be associated with a nearby supernova remnant, SNR HB9 (G160.9+2.6). We observe the neutral hydrogen (HI) absorption spectrum of PSR B0458+46 by using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), and detect two absorption lines at radial velocities of $V_{\rm LSR} = {-7.7}~{\rm km~s}^{-1}$ and $-28.1~{\rm km~s^{-1}}$. Based on the Galactic rotation curve with a modification factor correcting for the systematic stream in the anticenter region, we derive the kinematic distance of the farther absorption cloud, which is found to be located $2.7^{+0.9}_{-0.8}$ kpc away, just beyond the Perseus Arm. We also obtain a direct distance estimation of the absorption clouds, being $2.3_{-0.7}^{+1.1}$ kpc, based on a comparison of their velocity with the HI emission in the Perseus and Outer Arms that was well-defined by recently measured parallax tracers. As a result, we conclude that PSR B0458+46 should be located beyond the Perseus Arm, with a lower limit distance of 2.7 kpc, and therefore not associated with SNR HB9. The doubled distance indicates a deficiency of thermal electrons in the immediate outer Galaxy, with much less density than current models predict. Additionally, we detect a new high-velocity HI cloud in the direction of this pulsar.
description: 8 pages, 7 figures. Accepted for publication in MNRAS
Symmetric excitation and de-excitation of a cavity QED system
Creators: name: Jonasson, Olafur
name: Tang, Chi-Shung
name: Goan, Hsi-Sheng
name: Manolescu, Andrei
name: Gudmundsson, Vidar
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We calculate the time evolution of a cavity-QED system subject to a time dependent sinusoidal drive. The drive is modulated by an envelope function with the shape of a pulse. The system consists of electrons embedded in a semiconductor nanostructure which is coupled to a single mode quantized electromagnetic field. The electron-electron as well as photon-electron interaction is treated exactly using "exact numerical diagonalization" and the time evolution is calculated by numerically solving the equation of motion for the system's density matrix. We find that the drive causes symmetric excitation and de-excitation where the system climbs up the Jaynes-Cummings ladder and descends back down symmetrically into its original state. This effect persists even in the ultra-strong coupling regime where the Jaynes-Cummings model is invalid. We investigate the robustness of this symmetric behavior with respect to the drive de-tuning and pulse duration.
Quantum microscopic approach to low-energy heavy ion collisions
Creators: name: Simenel, Cédric
name: Wakhle, A.
name: Avez, Benoît
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Time-dependent Hartree-Fock (TDHF) theory is applied to the study of heavy ion collisions at energies around the Coulomb barrier. The competition between fusion and nucleon transfer mechanisms is investigated. For intermediate mass systems such as 16O+208Pb, proton transfer favors fusion by reducing the Coulomb repulsion. A comparison with sub-barrier transfer experimental data shows that pairing correlations are playing an important role in enhancing proton pair transfer. For heavier and more symmetric systems, a fusion hindrance is observed due to the dominance of the quasi-fission process. Typical quasi-fission time of few zeptoseconds are obtained. Actinide collisions are also investigated both within the TDHF approach and with the Ballian-Vénéroni prescription for fluctuation and correlation of one-body observables. The possible formation of new heavy neutron-rich nuclei in actinide collisions is discussed.
description: Invited Plenary Talk given at NN2012
Radio Sources Segmentation and Classification with Deep Learning
Creators: name: Lao, Baoqiang
name: Jaiswal, Sumit
name: Zhao, Zhen
name: Lin, Leping
name: Wang, Junyi
name: Sun, Xiaohui
name: Qin, Shengli
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Modern large radio continuum surveys have high sensitivity and resolution, and can resolve previously undetected extended and diffuse emissions, which brings great challenges for the detection and morphological classification of extended sources. We present HeTu-v2, a deep learning-based source detector that uses the combined networks of Mask Region-based Convolutional Neural Networks (Mask R-CNN) and a Transformer block to achieve high-quality radio sources segmentation and classification. The sources are classified into 5 categories: Compact or point-like sources (CS), Fanaroff-Riley Type I (FRI), Fanaroff-Riley Type II (FRII), Head-Tail (HT), and Core-Jet (CJ) sources. HeTu-v2 has been trained and validated with the data from the Faint Images of the Radio Sky at Twenty-one centimeters (FIRST). We found that HeTu-v2 has a high accuracy with a mean average precision ($AP_{\rm @50:5:95}$) of 77.8%, which is 15.6 points and 11.3 points higher than that of HeTu-v1 and the original Mask R-CNN respectively. We produced a FIRST morphological catalog (FIRST-HeTu) using HeTu-v2, which contains 835,435 sources and achieves 98.6% of completeness and up to 98.5% of accuracy compared to the latest 2014 data release of the FIRST survey. HeTu-v2 could also be employed for other astronomical tasks like building sky models, associating radio components, and classifying radio galaxies.
description: 20 pages, 15 figures, Accepted by Astronomy and Computing
One-loop effects on MSSM parameter determination via chargino production at the LC
Creators: name: Bharucha, Aoife
name: Kalinowski, Jan
name: Moortgat-Pick, Gudrid
name: Rolbiecki, Krzysztof
name: Weiglein, Georg
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: At a future linear collider, very precise measurements, typically with errors of <1%, are expected to be achievable. Such an accuracy yields sensitivity to quantum corrections, which therefore must be incorporated into theoretical calculations in order to determine the underlying new physics parameters from linear collider measurements. In the context of the chargino--neutralino sector of the minimal supersymmetric standard model, this involves fitting one-loop predictions to prospective measurements of cross sections, forward-backward asymmetries and the accessible chargino and neutralino masses. Taking recent results from LHC SUSY and Higgs searches into account, we consider three phenomenological scenarios, each displaying characteristic features. Our analysis demonstrates how an accurate determination of the desired parameters is possible, and could additionally provide access to the stop masses and mixing angle.
description: 23 pages, 4 figures, v2: typos corrected, minor clarifications, version submitted to journal
PERTEMUAN 12_21 NOVEMBER 2023_ISUE BEHAVIORAL ACCOUNTING_MASCULINITY_MANAJEMEN INVESTASI PROTOFOLIO_UNIGRES
Creators: name: Dr. Rusdiyanto, SE,. M. Ak,. CH,. CHt
Publisher: name: Zenodo
Year: 2023

description: Capaian Pembelajaran Mata Kuliah (CPMK)
Mahasiswa mampu memahami Konsep maskulinitas CEO merujuk pada karakteristik atau sifat-sifat yang seringkali terkait dengan kepemimpinan dalam konteks bisnis dan organisasi. Perlu diingat bahwa pandangan ini dapat bervariasi dan tidak semua orang setuju atau mendukung stereotip tertentu tentang bagaimana seorang CEO seharusnya bersikap atau bertindak.
Beberapa ciri atau sifat yang sering dikaitkan dengan maskulinitas CEO tradisional melibatkan aspek kepemimpinan yang mungkin dianggap "maskulin" dalam budaya tertentu. Beberapa di antaranya mungkin melibatkan:
Ketegasan: Kemampuan untuk membuat keputusan yang sulit dan menegakkan otoritas.
Ambisi dan Dorongan Bersaing: Kemauan untuk meraih keberhasilan, mencapai tujuan, dan bersaing di pasar bisnis.
Kemampuan Beradaptasi: Kemampuan untuk beradaptasi dengan perubahan pasar dan situasi bisnis dengan cepat.
Kemampuan Komunikasi yang Kuat: Kemampuan untuk berkomunikasi dengan jelas dan meyakinkan, baik dalam pertemuan eksternal maupun internal.
Keberanian Mengambil Risiko: Kecenderungan untuk mengambil risiko yang terukur dalam pengambilan keputusan.
Kemampuan Memimpin Tim: Kemampuan untuk memimpin, menginspirasi, dan memotivasi tim.
Namun, penting untuk diingat bahwa ini adalah generalisasi dan stereotip, dan banyak CEO yang sukses memiliki gaya kepemimpinan yang beragam, tidak tergantung pada gender. Kepemimpinan yang efektif cenderung didasarkan pada keterampilan pribadi, kepintaran emosional, kemampuan berpikir strategis, dan kemampuan untuk bekerja sama dengan orang lain.
Perubahan dalam paradigma kepemimpinan juga telah memperkuat pemahaman bahwa baik pria maupun wanita memiliki potensi untuk menjadi pemimpin yang efektif, dan diversifikasi kepemimpinan dapat memberikan perspektif yang lebih kaya dan holistik dalam menghadapi tantangan bisnis.
Occupancy and Direction Estimation Based on Grid Search Approach
Creators: name: , Aditya
name: Meghna
name: , Rhea
name: , Bikram
name: Duminda
name: Kamalheet
Publisher: name: Journal of Student-Scientists' Research
Year: 2022

description: The goal of this research is to maximize the use of energy in buildings using sensor-based occupancy detection, a process in which the objective is to determine the number of occupants in a room. In this research, sensors are installed to identify the number of occupants and the route they map while moving across a room. Occupancy data was also collected manually (no. of persons in 10-minute increments) to revalidate the sensor data. To determine estimated direction and occupancy, a grid search approach is the most effective to implement. Grid Search is a machine learning tool used to search through sets of data and train the model to output certain combinations of results based on the needs and behaviors of an individual. To estimate occupancy and direction, first, sensor plot matrices were integrated into Python scripts. Then, Python dictionaries were created to distinguish the values of the sensors and sort out the data. Lastly, a Grid Search was conducted on all of the unsearched coordinates, generating needed coordinates which were, then added to an external output list. To determine different sensor paths (connected islands of activated sensors), an algorithm was developed in this research. The algorithm consists of a series of steps; validating only sensors that are part of a motion path, excluding sensors that are not, and calculating the start & end position of the path. Using this information, an animated motion trail can be produced in order to visually depict the movement and number of the occupants. Keywords - Occupancy Detection, Grid Search
description: Journal of Student-Scientists' Research, Vol. 4 (2022)
Occupancy and Direction Estimation Based on Thermal Sensor Data
Creators: name: , Rick
name: Sharat
name: , Abigail
name: , Bikram
name: Duminda
Publisher: name: Journal of Student-Scientists' Research
Year: 2022

description: Building operations are responsible for twenty-seven percent of global carbon dioxide emissions. Currently, building HVAC systems operate at full power at all times. Optimizing them based on the amount and location of people in a building using occupancy detection solutions will reduce the carbon emissions they produce. Building occupancy detection solutions must be low-cost, low-power, high-performance, and privacy-preserving. Our research proposes a non-contact scheme for occupancy estimation using PIR sensors to obtain human body temperatures from a noisy temperature. We collected the ground truth data in the lab by recording the number of occupants detected by numbered PIR sensors in minute intervals. We compared the live data with the heat maps produced by the PIR sensors to determine the accuracy of the heat map. The verified data was then incorporated into a grid search method to determine the direction of occupant movements. In the future, this work will be used to train a model which will be able to accurately determine the occupancy counts of a building.
description: Journal of Student-Scientists' Research, Vol. 4 (2022)
Oriented gap opening in the magnetically ordered state of Iron-pnicitides: an impact of intrinsic unit cell doubling on the $Fe$ square lattice by $As$ atoms
Creators: name: Hao, NingNing
name: Wang, Yupeng
name: Hu, Jiangping
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We show that the complicated band reconstruction near Fermi surfaces in the magnetically ordered state of iron-pnictides observed by angle-resolved photoemission spectroscopies (ARPES) can be understood in a meanfield level if the \emph{intrinsic unit cell doubling} due to As atoms is properly considered as shown in the recently constructed S$_{4}$ microscopic effective model. The (0,$π$) or ($π$,0) col-linear antiferromagnetic (C-AFM) order does not open gaps between two points at Fermi surfaces linked by the ordered wave vector but forces a band reconstruction involving four points in unfolded Brillouin zone (BZ) and gives rise to small pockets or hot spots. The S$_4$ symmetry naturally chooses a staggered orbital order over a ferro-orbital order to coexist with the C-AFM order. These results strongly suggest that the kinematics based on the S$_{4}$ symmetry captures the essential low energy physics of iron-based superconductors.
description: 5 figures, 5 pages
Topological duality between vortices and planar skyrmions in BPS theories with APD symmetries
Creators: name: Adam, C.
name: Sanchez-Guillen, J.
name: Wereszczynski, A.
name: Zakrzewski, W. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The BPS baby Skyrme models are submodels of baby Skyrme models, where the nonlinear sigma model term is suppressed. They have skyrmion solutions saturating a BPS bound, and the corresponding static energy functional is invariant under area-preserving diffeomorphisms (APDs). Here we show that the solitons in the BPS baby Skyrme model, which carry a nontrivial topological charge $Q_{b} \in π_2(S^2)$ (a winding number), are dual to vortices in a BPS vortex model with a topological charge $Q_{v}\in π_1(S^1)$ (a vortex number), in the sense that there is a map between the BPS solutions of the two models. The corresponding energy densities of the BPS solutions of the two models are identical. A further consequence of the duality is that the dual BPS vortex models inherit the BPS property and the infinitely many symmetries (APDs) of the BPS baby Skyrme models. Finally, we demonstrate that the same topological duality continues to hold for the U(1) gauged versions of the models.
description: Latex, 18 pages, references added, typos corrected
MPEC 2023-W82 : 2023 WA2
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 WA2

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Time periodicity and dynamical stability in two-boson systems
Creators: name: Reslen, Jose
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We calculate the period of recurrence of dynamical systems comprising two interacting bosons. A number of theoretical issues related to this problem are discussed, in particular, the conditions for small periodicity. The knowledge gathered in this way is then used to propose a notion of dynamical stability based on the stability of the period. Dynamical simulations show good agreement with the proposed scheme. We also apply the results to the phenomenon known as coherent population trapping and find stability conditions in this specific case.
description: 7+ pages, 5 figures
Integration of 5G Network Management with Node Clusters for the Support of NextG Security
Creators: name: , Dominic
name: Arham
name: Duminda
Publisher: name: Journal of Student-Scientists' Research
Year: 2022

description: Increased reliance on wireless technology across all aspects of life has created a need for fast, reliable, and most importantly, secure communication standards. Fifth-generation telecommunication infrastructure (5G) is seen as the paradigm technology upon which many future developments will rely. As such, ensuring the security of these networks is vital. 5G networks can be secured and managed through architecture revolving around Open Network Automation Platform (ONAP), which helps to automate network processes. Kubernetes node clustering is essential to the virtualization aspect of 5G, providing the ability to manipulate virtual network functions (VNFs) alongside Openstack network controllers. When combined, these systems make it possible for 5G to be integrated with ONAP and controlled at an individualized level, bolstering its security.
description: Journal of Student-Scientists' Research, Vol. 4 (2022)
AdS/Ricci-flat correspondence and the Gregory-Laflamme instability
Creators: name: Caldarelli, Marco M.
name: Camps, Joan
name: Goutéraux, Blaise
name: Skenderis, Kostas
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that for every asymptotically AdS solution compactified on a torus there is a corresponding Ricci-flat solution obtained by replacing the torus by a sphere, performing a Weyl rescaling of the metric and appropriately analytically continuing the dimension of the torus/sphere (as in generalized dimensional reduction). In particular, it maps Minkowski spacetime to AdS on a torus, the holographic stress energy tensor of AdS to the stress energy tensor due to a brane localized in the interior of spacetime and AdS black branes to (asymptotically flat) Schwarzschild black branes. Applying it to the known solutions describing the hydrodynamic regime in AdS/CFT, we derive the hydrodynamic stress-tensor of asymptotically flat black branes to second order, which is constrained by the parent conformal symmetry. We compute the dispersion relation of the Gregory-Laflamme unstable modes through cubic order in the wavenumber, finding remarkable agreement with numerical data. In the case of no transverse sphere, AdS black branes are mapped to Rindler spacetime and the second-order transport coefficients of the fluid dual to Rindler spacetime are recovered.
description: v3: Matches published version
J. Stinner und K.-H. Tekath (Hg.), Gelre - Geldern - Gelderland. Geschichte und Kultur des Herzogtums Geldern. Teil 1: Aufsätze; R. Plötz (Hg.), Das Goldene Zeitalter des Herzogtums Geldern. Geschichte und Kultur im 15. und 16. Jahrhundert; Teil 2: Katalo
Creators: name: Bijsterveld, Arnoud-Jan
Publisher: name: Francia
Year: 2019

description: Francia, Bd. 29 Nr. 1 (2002)
The emergence of global phase coherence from local pairing in underdoped cuprates
Creators: name: Ye, Shusen
name: Zou, Changwei
name: Yan, Hongtao
name: Ji, Yu
name: Xu, Miao
name: Dong, Zehao
name: Chen, Yiwen
name: Zhou, Xingjiang
name: Wang, Yayu
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In conventional metal superconductors such as aluminum, the large number of weakly bounded Cooper pairs become phase coherent as soon as they start to form. The cuprate high critical temperature ($T_c$) superconductors, in contrast, belong to a distinctively different category. To account for the high $T_c$, the attractive pairing interaction is expected to be strong and the coherence length is short. Being doped Mott insulators, the cuprates are known to have low superfluid density, thus are susceptible to phase fluctuations. It has been proposed that pairing and phase coherence may occur separately in cuprates, and $T_c$ corresponds to the phase coherence temperature controlled by the superfluid density. To elucidate the microscopic processes of pairing and phase ordering in cuprates, here we use scanning tunneling microscopy to image the evolution of electronic states in underdoped $\rm Bi_2La_xSr_{2-x}CuO_{6+δ}$. Even in the insulating sample, we observe a smooth crossover from the Mott insulator to superconductor-type spectra on small islands with chequerboard order and emerging quasiparticle interference patterns following the octet model. Each chequerboard plaquette contains approximately two holes, and exhibits a stripy internal structure that has strong influence on the superconducting features. Across the insulator to superconductor boundary, the local spectra remain qualitatively the same while the quasiparticle interferences become long-ranged. These results suggest that the chequerboard plaquette with internal stripes plays a crucial role on local pairing in cuprates, and the global phase coherence is established once its spatial occupation exceeds a threshold.
The Effects of Latent Heating on Mid-Latitude Cyclones
Creators: name: , Evelyn
name: , Mary
name: , David
name: , Erik
Publisher: name: Journal of Student-Scientists' Research
Year: 2022

description: While the heat that’s generated within storms from condensation is a well-known process, the impact of this heating on the development and evolution of the storms is yet to be fully understood. The main goal of this project has been to document details of cyclone-related heating derived from ERA-5 (Cyclone tracking algorithm - Dr. Swenson), which is the most modern dataset for global atmospheric circulation. To attain this goal, figures were coded in the coding language Python from pre-collected storm data in which we analyzed where in the storm the most heating occurred and the degree of heating based on location relative to the storm center. The figures produced include plots such as the mean heating per atmospheric layer in a storm and in which layer the heating occurred most often. From these plots, it’s been found that 1000-925 hPa (Layer 0) and 775-650 hPa (Layer 3) of the storms have the most instances of maximum heating per storm. It’s also been observed that there is more surface (Layer 0) heating towards the southwest of storms whereas, in the northeast, the most heating occurs in Layer 3. The results of this project give a good idea of what natural variability occurs, and what levels are important, in the latent heating of mid-latitude cyclones.
description: Journal of Student-Scientists' Research, Vol. 4 (2022)
Macroscopic diffusion from a Hamilton-like dynamics
Creators: name: Lefevere, Raphael
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We introduce and analyze a model for the transport of particles or energy in extended lattice systems. The dynamics of the model acts on a discrete phase space at discrete times but has nonetheless some of the characteristic properties of Hamiltonian dynamics in a confined phase space : it is deterministic, periodic, reversible and conservative. Randomness enters the model as a way to model ignorance about initial conditions and interactions between the components of the system. The orbits of the particles are non-intersecting random loops. We prove, by a weak law of large number, the validity of a diffusion equation for the macroscopic observables of interest for times that are arbitrary large, but small compared to the minimal recurrence time of the dynamics.
description: typos corrected, figure improved
Learnersourcing in the Age of AI: Student, Educator and Machine Partnerships for Content Creation
Creators: name: Khosravi, Hassan
name: Denny, Paul
name: Moore, Steven
name: Stamper, John
Publisher: name: arXiv
Year: 2023
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Engaging students in creating novel content, also referred to as learnersourcing, is increasingly recognised as an effective approach to promoting higher-order learning, deeply engaging students with course material and developing large repositories of content suitable for personalized learning. Despite these benefits, some common concerns and criticisms are associated with learnersourcing (e.g., the quality of resources created by students, challenges in incentivising engagement and lack of availability of reliable learnersourcing systems), which have limited its adoption. This paper presents a framework that considers the existing learnersourcing literature, the latest insights from the learning sciences and advances in AI to offer promising future directions for developing learnersourcing systems. The framework is designed around important questions and human-AI partnerships relating to four key aspects: (1) creating novel content, (2) evaluating the quality of the created content, (3) utilising learnersourced contributions of students and (4) enabling instructors to support students in the learnersourcing process. We then present two comprehensive case studies that illustrate the application of the proposed framework in relation to two existing popular learnersourcing systems.
Antibiotic Development Against Klebsiella pneumoniae
Creators: name: Kateri
name: Archi
name: , Robin
name: , Allyson
Publisher: name: Journal of Student-Scientists' Research
Year: 2022

description: Each year over 23000 people are infected with the opportunistic gram-negative bacteria known as Klebsiella pneumoniae. Approximately 1 in every 3 of these infections demonstrate resistance to all available antibiotics, including carbapenem, an antibiotic often touted as the last line of defense against bacterial infection. Thus, there is an urgent need to develop new antibiotics against this pathogen. Isoprenoids are a class of molecules needed for fundamental cell functions and are essential for life. While humans use the mevalonic acid biosynthetic pathway to make isoprenoids, many pathogenic bacteria, including K. pneumoniae, produce their essential isoprenoid molecules via the methylerythritol phosphate (MEP) pathway. Since the MEP pathway is absent in humans, MEP pathway enzymes are attractive targets for the development of new antibiotics.
description: Journal of Student-Scientists' Research, Vol. 4 (2022)
Large Thermoelectric Power Factor in P-type Si (110)/[110] Ultra-Thin-Layers Compared to Differently Oriented Channels
Creators: name: Neophytou, Neophytos
name: Kosina, Hans
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Using atomistic electronic structure calculations and Boltzmann semi-classical transport we compute the thermoelectric power factor of ultra-thin-body p-type Si layers of thicknesses from W=3nm up to 10nm. We show that the power factor for channels in [110] transport orientation and strong (110) surface confinement largely outperforms all differently oriented channels by more than 2X. Furthermore, the power factor in this channel increases by ~40% with layer thickness reduction. This increase, together with the large confinement effective mass of the (110) surface, make this particular channel less affected by the detrimental effects of enhanced surface roughness scattering and distortion at the nanoscale. Our results, therefore, point towards the optimal geometrical features regarding orientation and length scale for power factor improvement in 2D thin-layers of zincblende semiconductors.
description: 20 pages, 5 figures
Balaenopteridae Gray 1864
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Cetacea
Balaenopteridae

description: Family Balaenopteridae REVIEWED BY: J. G. Mead (JGM); M. Nishiwaki (MN); D. W. Rice (DWR); O. L. Rossolimo (OLR)(U.S. S.R.). PROTECTED STATUS: CITES - Appendix II as Order Cetacea. ISIS NUMBER: 5301411007000000000.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Cetacea, pp. 290-304 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 302, DOI: 10.5281/zenodo.7352983
Measurement of Volatile Organic Carbon (VOC) inside Masks: Are We Breathing Poor Quality Air?
Creators: name: Sudeep
name: Abul
Publisher: name: Journal of Student-Scientists' Research
Year: 2022

description: The COVID-19 pandemic has dramatically increased the number of face masks being worn in order to prevent the spread of the SARS-CoV-2 virus. While face masks are effective for protecting against harmful compounds in the environment from the outside, rebreathing the air inside the mask may potentially be harmful. To measure the quality of air accumulated during mask usage, we developed an instrument using an Arduino microcontroller connected to a Bosch BME680 sensor to measure volatile organic carbon (VOC), humidity, and temperature inside and outside of three different masks: Surgical, Arun KN95, and Honeywell NIOSH N95. During the experiment, all three parameters immediately increased to a constant value and did not decrease during breathing trails for 5, 10, and 15 minutes into the mask. During the breathing trails, the air quality was found to be moderate and never changed. The total VOC and humidity increased linearly (R squared > 0.997) with time for all three masks. Additionally, the sensor was calibrated at 37 C with acetone vapor to calculate the VOC (in micrograms/L or ppb) ketone-basis (kbVOC). The calibration shows a response factor of 1.08E-09 M/ohm or 0.063 micrograms/L and a detection limit of 132 ppb at a signal-to-noise ratio of 64.3. The kbVOC values were found by multiplying the response factor with the VOC values during breathing trials. When plotted, the kbVOC values fluctuated between 15 to 20 ppb, indicating poor air quality inside our masks. Further calculations of VOC and humidity permeability showed the face masks used are 80-90 percent permeable. This study raises questions about the quality of air that we breathe inside our face masks and the subsequent health risks associated with it. Although the present study was conducted by a healthy person (SO), it can be extended to people with various conditions, such as stress or diseases, where higher VOC concentrations are produced.
description: Journal of Student-Scientists' Research, Vol. 4 (2022)
Continuum-discretized coupled-channel calculations for $^{6}$Li fusion reactions with closed channels
Creators: name: Chen, Wendi
name: Pang, D. Y.
name: Guo, Hairui
name: Tao, Ye
name: Sun, Weili
name: Ying, Yangjun
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Fusion reactions induced by the weakly bound nucleus $^{6}$Li with targets $^{28}$Si, $^{64}$Ni, $^{144}$Sm and $^{209}$Bi at energies around the Coulomb barrier are investigated within a three-body model where $^{6}$Li is described with an $α+ d$ cluster model. The total fusion (TF) cross sections are calculated with the continuum-discretized coupled-channel (CDCC) method and the complete fusion (CF) cross sections are extracted through the sum-rule model. The calculations demonstrate that (i) for the TF cross section calculations, the continuum states up to 40 MeV are found to be necessary, which corresponds to the inclusion of closed channels for light and medium mass targets, such as $^{28}$Si, $^{59}$Co and $^{144}$Sm, (ii) the converged CDCC results for TF cross section at energies above the Coulomb barrier are almost the same as single channel results in which the continuum coupling effect is neglected, and (iii) the continuum coupling strongly influences partial wave fusion cross sections and the closed channels play a significant role in the improvement of the description of the CF cross sections at energies below the Coulomb barrier for the $^6$Li+$^{28}$Si, $^{59}$Co and $^{144}$Sm systems.
description: 15 pages; 23 figures
The velocity shear tensor: tracer of halo alignment
Creators: name: Libeskind, Noam I.
name: Hoffman, Yehuda
name: Forero-Romero, Jaime
name: Gottlöber, Stefan
name: Knebe, Alexander
name: Steinmetz, Matthias
name: Klypin, Anatoly
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The alignment of DM halos and the surrounding large scale structure (LSS) is examined in the context of the cosmic web. Halo spin, shape and the orbital angular momentum of subhaloes is investigated relative to the LSS using the eigenvectors of the velocity shear tensor evaluated on a grid with a scale of 1 Mpc/h, deep within the non-linear regime. Knots, filaments, sheets and voids are associated with regions that are collapsing along 3, 2, 1 or 0 principal directions simultaneously. Each halo is tagged with a web classification (i.e. knot halo, filament halo, etc) according to the nature of the collapse at the halo's position. The full distribution of shear eigenvalues is found to be substantially different from that tagged to haloes, indicating that the observed velocity shear is significantly biased. We find that larger mass haloes live in regions where the shear is more isotropic, namely the expansion or collapse is more spherical. A correlation is found between the halo's shape and the eigenvectors of the shear tensor, with the longest (shortest) axis of the halo's shape being aligned with the slowest (fastest) collapsing eigenvector. This correlation is web independent, suggesting that the velocity shear is a fundamental tracer of the halo alignment. A similar result is found for the alignment of halo spin with the cosmic web. It has been shown that high mass haloes exhibit a spin flip with respect to the LSS: we find the mass at which this spin flip occurs is web dependent and not universal as suggested previously. Although weaker than haloes, subhalo orbits too exhibit an alignment with the LSS, providing a possible insight into the highly correlated co-rotation of the Milky Way's satellite system. The present study suggests that the velocity shear tensor constitutes the natural framework for studying the directional properties of the non-linear LSS and of halos and galaxies.
description: 14 Pages, 10 Figures; accepted MNRAS 2012
The role of high-order anharmonicity and off-diagonal terms in thermal conductivity: a case study of multi-phase CsPbBr3
Creators: name: Wang, Xiaoying
name: Gao, Zhibin
name: Zhu, Guimei
name: Ren, Jie
name: Hu, Lei
name: Sun, Jun
name: Ding, Xiangdong
name: Xia, Yi
name: Li, Baowen
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We investigate the influence of three- and four-phonon scattering, perturbative anharmonic phonon renormalization, and off-diagonal terms of coherent phonons on the thermal conductivity of CsPbBr3 phase change perovskite, by using advanced implementations and first-principles simulations. Our study spans a wide temperature range covering the entire structural spectrum. Notably, we demonstrate that the interactions between acoustic and optical phonons result in contrasting trends of phonon frequency shifts for the high-lying optical phonons in orthorhombic and cubic CsPbBr3 as temperature varies. Our findings highlight the significance of wave-like tunneling of coherent phonons in ultralow and glass-like thermal conductivity in halide perovskites.
description: 9 pages, 4 figures
Inhalt
Creators: name: Redaktion, Die
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: -
description: Funde und Ausgrabungen im Bezirk Trier, Bd. 46 (2014): Funde und Ausgrabungen im Bezirk Trier : Aus der Arbeit des Rheinischen Landesmuseums Trier
Simultaneous remote transfer of accurate timing and optical frequency over a public fiber network
Creators: name: Lopez, Olivier
name: Kanj, Amale
name: Pottie, Paul-Eric
name: Rovera, Giovanni D.
name: Achkar, Joseph
name: Chardonnet, Christian
name: Amy-Klein, Anne
name: Santarelli, Giorgio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: Instrumentation and Detectors (physics.ins-det)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this work we demonstrate for the first time that it is possible to transfer simultaneously an ultra-stable optical frequency and a precise and accurate timing over 540 km using a public telecommunication optical fiber networks with Internet data. The optical phase is used to carry both the frequency information and the timestamps by modulating a very narrow optical carrier at 1.55 $μ$m with spread spectrum signals using two-way satellite time transfer modems. The results in term of absolute time accuracy (250 ps) and long-term timing stability (20 ps) well outperform the conventional Global Navigation Satellite System or geostationary transfer methods.
Truncated second main theorem for non-Archimedean meromorphic maps
Creators: name: Quang, Si Duc
Publisher: name: arXiv
Year: 2023
Subjects: subject: Algebraic Geometry (math.AG)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11S80, 11J97, 32H30

description: Let $\mathbb F$ be an algebraically closed field of characteristic $p\ge 0$, which is complete with respect to a non-Archimedean absolute value. Let $V$ be a projective subvariety of $\mathbb P^M(\mathbb F)$. In this paper, we will prove some second main theorems for non-Archimedean meromorphic maps of $\mathbb F^m$ into $V$ intersecting a family of hypersurfaces in $N-$subgeneral position with truncated counting functions.
description: This final version is publish in Journal of Mathematics and Mathematical Science https://science.thanglong.edu.vn/index.php/volc/article/view/93
Statistical Agent Based Modelization of the Phenomenon of Drug Abuse
Creators: name: Di Clemente, Riccardo
name: Pietronero, Luciano
Publisher: name: arXiv
Year: 2012
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Computers and Society (cs.CY)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We introduce a statistical agent based model to describe the phenomenon of drug abuse and its dynamical evolution at the individual and global level. The agents are heterogeneous with respect to their intrinsic inclination to drugs, to their budget attitude and social environment. The various levels of drug use were inspired by the professional description of the phenomenon and this permits a direct comparison with all available data. We show that certain elements have a great importance to start the use of drugs, for example the rare events in the personal experiences which permit to overcame the barrier of drug use occasionally. The analysis of how the system reacts to perturbations is very important to understand its key elements and it provides strategies for effective policy making. The present model represents the first step of a realistic description of this phenomenon and can be easily generalized in various directions.
description: 12 pages, 5 figures
A pose and shear-based tactile robotic system for object tracking, surface following and object pushing
Creators: name: Lloyd, John
name: Lepora, Nathan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Tactile perception is a crucial sensing modality in robotics, particularly in scenarios that require precise manipulation and safe interaction with other objects. Previous research in this area has focused extensively on tactile perception of contact poses as this is an important capability needed for tasks such as traversing an object's surface or edge, manipulating an object, or pushing an object along a predetermined path. Another important capability needed for tasks such as object tracking and manipulation is estimation of post-contact shear but this has received much less attention. Indeed, post-contact shear has often been considered a "nuisance variable" and is removed if possible because it can have an adverse effect on other types of tactile perception such as contact pose estimation. This paper proposes a tactile robotic system that can simultaneously estimate both the contact pose and post-contact shear, and use this information to control its interaction with other objects. Moreover, our new system is capable of interacting with other objects in a smooth and continuous manner, unlike the stepwise, position-controlled systems we have used in the past. We demonstrate the capabilities of our new system using several different controller configurations, on tasks including object tracking, surface following, single-arm object pushing, and dual-arm object pushing.
description: A video demonstrating the methods described in this paper is available at https://www.youtube.com/watch?v=xVs4hd34ek0
Hartwig Zürn, Hallstattzeitliche Grabfunde in Württemberg und Hohenzollern
Creators: name: Gleirscher, Paul
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Rezension zu: Hartwig Zürn, Hallstattzeitliche Grabfunde in Württemberg und Hohenzollern. Forschungen und Berichte zur Vor- und Frühgeschichte in Baden-Württemberg 25. Konrad Theiss Verlag, Stuttgart 1987. ISBN 3-8062-0779-8. Text- und Tafelband: 247 Seiten und 99 Abbildungen; 505 Tafeln.
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 67 Nr. 1 (1989)
MPEC 2023-W83 : 2023 WB2
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 WB2

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Markus Egg, Italische Helme
Creators: name: Teržan, Biba
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Rezension zu: Markus Egg, Italische Helme. Studien zu den ältereisenzeitlichen Helmen Italiens und der Alpen. Römisch-Germanisches Zentralmuseum, Monographien Band 11. Verlag des Römisch-Germanischen Zentralmuseums, in Kommission bei Dr. Rudolf Habelt GmbH, Mainz/Bonn 1986. ISBN 3-88467-015-8; ISSN 0171-1474. IX, 261 Seiten und 221 Abbildungen (Teil 1); 292 Tafeln (Teil 2)
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 67 Nr. 2 (1989)