cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Concussions in Sports
Creators: name: Hanrahan, Donna
Publisher: name: Voices in Bioethics
Year: 2013

description: Concussions have long been the dominant subject of concern in the sports world and are a serious concern in public health. This August, the National Football League (NFL) settled a lawsuit brought by more than 4,500 players and their families. The plaintiffs accused the League of concealing information about the dangers of repeated hits to the head, including minor traumatic brain injury (mTBI), concussions, and most significantly, chronic traumatic encephalopathy (CTE), a degenerative brain condition similar to Alzheimer’s disease. The $765 million settlement will be available to all retired players with neurological problems, not just the plaintiffs. This settlement marks an important shift in policy not only for the NFL, but also for other contact sports at all levels of play. As a part of the settlement, a $10 million research fund will be established. The League will continue to modify its medical protocols for concussions and change its rules to make the game safer in light of new scientific research. One of the most promising sectors of research is the use of advanced information technology to develop safer helmets and high-tech sensors to detect injury. However, it remains to be seen whether these advancements will significantly reduce incidence or severity of concussions on the field. Until relatively recently, the NFL has remained on the sidelines when it comes to brain injuries and their associated long-term neurodegenerative pathologies. In fact, the plaintiffs maintain that the NFL failed to properly warn players about how concussions could affect their brain functions after they retired until 2010. Further, they attest that the League did so despite available scientific evidence about the risks, thus failing to regulate the sport in a manner that would prevent brain injuries in accordance with this knowledge. The NFL denied knowingly misleading players about head injuries, maintaining that its concussion policies relied on the best science available at the time. With millions of children and adolescents playing football in the United States alone each year, now is the time to push new policies over the goal line to avoid further concussion-related brain injuries like CTE. Further ethical and legal analysis of the NFL concussion litigation is necessary to determine its effect on the development of policies to ensure safer conditions for players. Related Article: "N.F.L. Agrees to Settle Concussion Suit for $765 Million" by Ken Belson August 29, 2013. The New York Times http://www.nytimes.com/2013/08/30/sports/football/judge-announces-settlement-in-nfl-concussion-suit.html?smid=tw-share&_r=1&&pagewanted=all
description: Voices in Bioethics, Archives (2013)
In-flight calibration and verification of the Planck-LFI instrument
Creators: name: Gregorio, Anna
name: Cuttaia, Francesco
name: Mennella, Aniello
name: Bersanelli, Marco
name: Maris, Michele
name: Meinhold, Peter
name: Sandri, Maura
name: Terenzi, Luca
name: Tomasi, Maurizio
name: Villa, Fabrizio
name: Frailis, Marco
name: Morgante, Gianluca
name: Pearson, Dave
name: Zacchei, Andrea
name: Battaglia, Paola
name: Butler, Reginald Christophe
name: Davis, Richard
name: Franceschet, Cristian
name: Franceschi, Enrico
name: Galeotta, Samuele
name: Leonardi, Rodrigo
name: Lowe, Steve
name: Mandolesi, Nazzareno
name: Melot, Frederick
name: Mendes, Luis
name: Stassi, Patrick
name: Stringhetti, Luca
name: Tavagnacco, Daniele
name: Zonca, Andrea
name: Wilkinson, Althea
name: Wilson, Philip
name: Charra, Maryse
name: Maciaszek, Thierry
name: Foley, Steve
name: Watson, Christopher J.
name: Casale, Mauro
name: Laureijs, René
name: Tauber, Jan
name: Texier, Damien
name: Baker, Michelle
name: Cuevas, Leticia Perez
name: Krassenburg, Mike
name: Rihet, Patrick
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences
subject: B.4.4; B.8.0; J.2
subject: 85-05 (primary)

description: In this paper we discuss the Planck-LFI in-flight calibration campaign. After a brief overview of the ground test campaigns, we describe in detail the calibration and performance verification (CPV) phase, carried out in space during and just after the cool-down of LFI. We discuss in detail the functionality verification, the tuning of the front-end and warm electronics, the preliminary performance assessment and the thermal susceptibility tests. The logic, sequence, goals and results of the in-flight tests are discussed. All the calibration activities were successfully carried out and the instrument response was comparable to the one observed on ground. For some channels the in-flight tuning activity allowed us to improve significantly the noise performance.
description: Long technical paper on Planck LFI in flight calibration campaign: 109 pages in this (not final) version, 100 page in the final JINST version
What We Know About Community College Low-Income and Minority Student Outcomes: Descriptive Statistics from National Surveys
Creators: name: Bailey, Thomas R.
name: Jenkins, Paul Davis
name: Leinbach, D. Timothy
Publisher: name: Columbia University
Year: 2005
Subjects: Community college students--Education
Community colleges

description: This report summarizes the latest available national statistics on access and attainment by low income and minority community college students. The data come from the National Center for Education Statistics' (NCES) Integrated Postsecondary Education Data System (IPEDS) annual surveys of all postsecondary educational institutions, and the NCES Beginning Postsecondary Students Longitudinal Study 1996-2001 (BPS:96/01). The IPEDS data provide longitudinal trend statistics of actual enrollments and degrees awarded by institution type and student characteristics between 1992 and 2002. From this we learn about the overall enrollment rates of minorities, the total number of types of credentials earned by race/ethnicity, and we compare the rates across institution types to assess the relative achievement of students at community colleges. We also estimate the rate of degree attainment relative to the rate of enrollment by race/ethnicity at different types of institutions. For national data on patterns of enrollment by student income and program type, we need to look at survey datasets such as BPS:96/01. The authors use data from BPS:96/01 to describe enrollment patterns and completion rates by minority and low-income student characteristics. In contrast to IPEDS, BPS:96/01 provides us with achievement rates (degree and certificate attainment and transfer to baccalaureate institutions) for different types of students after six years, since beginning their postsecondary enrollment and across all institutions in which they enrolled during that time period.
Strengthening Transitions by Encouraging Career Pathways: A Look at State Policies and Practices
Creators: name: Hughes, Katherine Lee
name: Karp, Melinda Jane Mechur
Publisher: name: Columbia University
Year: 2006
Subjects: Community college students--Education
Community colleges

description: This report identifies ways in which state policies can support students’ academic and labor market success by creating coherent systems of preparation for students entering technical fields. In particular, the report focuses on state policies that support the implementation of career pathways, such as those encouraged by the U.S. Department of Education’s College and Career Transitions Initiative, which span secondary and postsecondary education and culminate in rewarding careers.
Constraints on muon-specific dark forces
Creators: name: Karshenboim, Savely G.
name: McKeen, David
name: Pospelov, Maxim
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The recent measurement of the Lamb shift in muonic hydrogen allows for the most precise extraction of the charge radius of the proton which is currently in conflict with other determinations based on $e-p$ scattering and hydrogen spectroscopy. This discrepancy could be the result of some new muon-specific force with O(1-100) MeV force carrier---in this paper we concentrate on vector mediators. Such an explanation faces challenges from the constraints imposed by the $g-2$ of the muon and electron as well as precision spectroscopy of muonic atoms. In this work we complement the family of constraints by calculating the contribution of hypothetical forces to the muonium hyperfine structure. We also compute the two-loop contribution to the electron parity violating amplitude due to a muon loop, which is sensitive to the muon axial-vector coupling. Overall, we find that the combination of low-energy constraints favors the mass of the mediator to be below 10 MeV, and that a certain degree of tuning is required between vector and axial-vector couplings of new vector particles to muons in order to satisfy constraints from muon $g-2$. However, we also observe that in the absence of a consistent standard model embedding, high energy weak-charged processes accompanied by the emission of new vector particles are strongly enhanced by $(E/m_V)^2$, with $E$ a characteristic energy scale and $m_V$ the mass of the mediator. In particular, leptonic $W$ decays impose the strongest constraints on such models completely disfavoring the remainder of the parameter space.
description: 10 pages, 7 figures
BECOMING GLOBAL CITIZENS: A NARRATIVE INQUIRY INTO SOUTH ASIAN INTERNATIONAL STUDENTS’ FORMS OF ACTIVISM FROM A SOKA PERSPECTIVE
Creators: name: Chhikara, Alankrita
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: classificationCode: 390102
subject: Curriculum and pedagogy theory and development
classificationCode: 399999
subject: Other education not elsewhere classified

description: Global citizenship is conceptualized within a neoliberal agenda and oppressive geopolitics of knowledge that furthers social inequities and unsustainability. Despite critiques and attempts to reframe global citizenship to achieve social justice and human rights aims, it is still masked in neoliberal and mono-epistemological terms as global competence. It is vital to explore possibilities of global citizenship becoming that can challenge neoliberal hegemony and the growing ethnocentric and ultra-nationalist thinking. This inquiry was conceptualized, within the three-dimensional narrative inquiry space, to explore the being and becoming of six South Asian female international students engaged in activism and the bearing it has on global citizenship. My co-researchers negotiated their dynamic identities and were influenced by multiple discourses as they shuttled between various places and spaces. In this inquiry, I examine autobiographical roots that illuminate my research puzzles and phenomena of interest and engage with South Asian female international students as they negotiate their personal, educational, and activist experiences. I analyze their lived experiences based on Ikeda’s perspective on global citizenship, informed by ideas of sōka or “value-creating” education and Buddhist-humanism. The research texts based on the livings and tellings of my participants are represented dialogically in culturally relevant ways, such as chai pe charcha or “conversations over tea.” From a narrative global citizenship perspective, these stories are examples of ‘creative coexistence’ and ‘value creation’ and offer a means to reimagine global citizenship from the standpoint of interconnectedness and interdependence.
Modeling the non-recycled Fermi gamma-ray pulsar population
Creators: name: Perera, B. B. P.
name: McLaughlin, M. A.
name: Cordes, J. M.
name: Kerr, M.
name: Burnett, T. H.
name: Harding, A. K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We use Fermi Gamma-ray Space Telescope detections and upper limits on non-recycled pulsars obtained from the Large Area Telescope (LAT) to constrain how the gamma-ray luminosity L depends on the period P and the period derivative \dot{P}. We use a Bayesian analysis to calculate a best-fit luminosity law, or dependence of L on P and \dot{P}, including different methods for modeling the beaming factor. An outer gap (OG) magnetosphere geometry provides the best-fit model, which is L \propto P^{-a} \dot{P}^{b} where a=1.36\pm0.03 and b=0.44\pm0.02, similar to but not identical to the commonly assumed L \propto \sqrt{\dot{E}} \propto P^{-1.5} \dot{P}^{0.5}. Given upper limits on gamma-ray fluxes of currently known radio pulsars and using the OG model, we find that about 92% of the radio-detected pulsars have gamma-ray beams that intersect our line of sight. By modeling the misalignment of radio and gamma-ray beams of these pulsars, we find an average gamma-ray beaming solid angle of about 3.7π for the OG model, assuming a uniform beam. Using LAT-measured diffuse fluxes, we place a 2σ upper limit on the average braking index and a 2σ lower limit on the average surface magnetic field strength of the pulsar population of 3.8 and 3.2 X 10^{10} G, respectively. We then predict the number of non-recycled pulsars detectable by the LAT based on our population model. Using the two-year sensitivity, we find that the LAT is capable of detecting emission from about 380 non-recycled pulsars, including 150 currently identified radio pulsars. Using the expected five-year sensitivity, about 620 non-recycled pulsars are detectable, including about 220 currently identified radio pulsars. We note that these predictions significantly depend on our model assumptions.
description: 26 pages, 10 figures, Accepted by ApJ on 8 September 2013
D3.2 Deployment of the VITIGEOSS  cloud-based application portal
Creators: name: VitiGEOSS Partners
Publisher: name: Zenodo
Year: 2023

description: This document addresses the developments and deployment phase of the VitiGEOSS cloud- based application portal and informs on deliverable 3.2, which is a demonstrator. Section 1 presents the solution and architecture describing the functionality of each of the components for the visualisation and exchange of the information among partners in VitiGEOSS. Section 2 presents a set of mock-ups describing both the Application and API Service Store. They serve as guideline to describe the features co-designed with the end-users and intelligent service providers to present the different services and functionality for authenticating the APIs. A preliminary set of standards are defined to facilitate the exchange of information, which will be addressed and further elaborated when configurating the intelligent services into the VitiGEOSS application. Section 3 presents a functional demonstrator, based on FieldLook, to access and visualise the information for one of the end-users. Also, the functionality of API Service store is demonstrated with APIs provided by the intelligent service providers. Section 4 summarises the actions to be developed with the project partners including the implementation of the VitiGEOSS layout and configuration of the intelligent services and functional tests. These actions will be coordinated and reported accordingly as part of the project in other deliverables.
description: The VitiGEOSS project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No. 869565
Achieving the Dream in Ohio: State Policies Affecting Access to, and Success In, Community Colleges for Students of Color and Low-Income Students
Creators: name: Dougherty, Kevin J.
name: Marshall, James
name: Soonachan, Andrea
Publisher: name: Columbia University
Year: 2006
Subjects: Community college students--Education
Community colleges

description: Ohio is one of two states in the second round of the Achieving the Dream initiative. In joining the initiative along with Connecticut, it brings in a northern Midwestern state that is quite different from the five southern and southwestern states that comprised the first round of the Achieving the Dream initiative. This report provides an audit of state policies in Ohio affecting access to, and success in, community colleges for students of color and low-income students. It is the product of intensive interviews that were conducted in Ohio and an analysis of documents produced both by state agencies and external organizations such as the Education Commission of the States.
Rise of the Planet Apes
Creators: name: Eshikena, Marilyn
Publisher: name: Voices in Bioethics
Year: 2013

description: Have you ever stared at your sad dog one evening and thought, “if only you could talk…”? Well, apparently, ALZ-112 will do the trick! If you don’t believe me, then you need to watch Rise of the Planet of the Apes. The scientific fiction movie, while showing the potential acting talent of apes, touches on ethical issues in the biopharmaceutical industry. Will Rodman, a research scientist for a biopharmaceutical company, Genesis, spent five years of his life working passionately on a cure for Alzheimer’s. His work birthed ALZ-112, which was tested on an ape captured in a dramatic manner. His experiment with this single subject yielded positive results and so began his eagerness for human trials. Eventually, Rodman’s ape, Caesar, yells out “NO!” The first ethical issue the movie raises is the protection of animals used in science research. The star ape that had shown a favorable response to the drug, went rogue. Thus, all other apes involved in the experiment to be killed. This mirrors our real-world concern over the dispensability of animals to humans in research work. Is it ethically justifiable to eradicate an entire herd of research animals without investigation just because one of them has become potentially dangerous? Shouldn’t there be other ways to ease an aggressive animal that doesn’t involve a gun and bullets? The second ethical issue the movie raises is autonomy and informed consent in clinical trials. Rodman, in his desperation to save his father from Alzheimer’s, injected him with ALZ-112 while he was asleep. At this moment, his father had unknowingly entered into a one-man clinical trial for a drug that had not even gone through phase 1 safety testing. Tied closely to this is the issue of surrogacy for subjects with diminished or no autonomy. In this case, Rodman’s father had diminished autonomy because of his memory loss and vulnerable condition. Normally, a caretaker or family member is expected to make this decision for such a patient and thus, will be responsible for protecting the patient from exploitation. What happens when a research subject is related to the researcher? Who is then responsible for ensuring that there is no breach of autonomy? The third ethical issue the movie raises is conflict of interest (COI). While the movie highlights a pharmaceutical company’s primary concern for increased profit margins, questionable financial ties are not the only COIs that affect research validity. Ethical breaches like data manipulation may exist when a researcher is desperate to prove the validity of his work, especially if a loved one will benefit from its result. Certainly, Rise of the Planet of the Apes, does a good job of drawing awareness to modern bioethical questions. I recommend it to anyone interested in not only bioethical topics related to the pharmaceutical industry but also realistic science fiction.
description: Voices in Bioethics, Archives (2013)
Using Census Date to Classify Community College Students By Socioeconomic Status and Community Characteristics
Creators: name: Jenkins, Paul Davis
name: Leinbach, D. Timothy
name: Crosta, Peter Michael
name: Prince, David
name: Whittaker, Doug
Publisher: name: Columbia University
Year: 2008
Subjects: Community college students--Education
Community colleges

description: Colleges and state higher education agencies too often lack accurate information about the socioeconomic status (SES) of their students. Information on family income, education levels, and other demographics is available for students who fill out a Free Application for Federal Financial Aid (FAFSA), but at most colleges only a portion of students do so. This presents a problem for efforts to better understand patterns and determinants of student success, since research shows that SES is a key factor in college access and attainment (Adelman, 1999; Cabrera, Burkum, and La Nasa, 2005; Long, 2004; Pascarella and Terenzini, 2005; Rouse, 1995). The paper is organized as follows: Following this introduction, the second section describes how we linked students with block groups to estimate their SES, defined in terms of household income, education, and occupation. We did this analysis using data from both the 1990 and 2000 Censuses. In the third section, we used cluster analysis to combine Census block groups into 15 demographically distinctive “community clusters,” and then matched each student with a cluster. Doing this enabled us to classify students according to a richer set of information than just income, education, and occupation. These community clusters will be useful to the WSBCTC and its member colleges in gauging their “market penetration” in various demographic sectors of the state, and in identifying particular communities where students may face barriers to college access. Given the interest of the state in ensuring access to college by students from low-income families, the fourth section shows how the community clusters break out by SES. We conclude with some suggestions for ways that state agencies and colleges in other states can use this methodology.
Single molecule capturer by doped monatomic carbon chain
Creators: name: Lin, Zheng-Zhe
name: Chen, Xi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The B-doped monatomic carbon chain has fine molecular capture ability to H2O and especially to NO2, better than other doped monatomic carbon chains.At 300 K and 1 atm, the capture probability of the B-doped monatomic carbon chain is appreciable even in a NO2 concentration of 1 p.p.m., and the adsorbates' influence on the quantum transport is notable for the detection. In contrast, the pure monatomic carbon chain shows its invulnerability to N2, O2, H2O, NO2, CO and CO2, and it is incapable for molecule capturing due to too low adsorption ability and weak response on the quantum conductance. In the investigation of these issues, a statistic mechanical model [EPL 94, 40002 (2011); Chin. Phys. Lett. 29, 2012 (080501)] was extended to predict the adsorption and desorption rates of molecules on nanodevices. The theoretical foundation of this model was further discussed and its accuracy was verified by molecular dynamics simulations.
AIDS in New York
Creators: name: Holmquist, Stephanie
Publisher: name: Voices in Bioethics
Year: 2013

description: It’s just a snapshot of a group of men, at a glance one can see it’s from 30 or so years ago. You might guess it’s a group of gay men, something about the mustaches, the clothes, the shirtless man in the foreground. None of them is yet fully middle aged. If you didn’t know otherwise, the smiles and camaraderie signal an evening ahead of dinner, wine, talk—an ordinary happy occasion. But then there are the name tags. The photo, from a conference of activists in Denver in 1983, marks a turning point in the modern patient empowerment movement. This small group of men gave us the Denver Principles—the landmark response from the gay community to the crisis in medicine and medical ethics of the early 1980’s. They called themselves “people with AIDS,” neither victims nor patients, but whole persons who expected to be treated as such. National Association of People with AIDS (NAPWA), the organizational home of the Denver Principles, dissolved this year. The ethos of the Denver Principles lives on for PWA and HIV and also in the general expectation of patient empowerment and dignity for all kinds of “people with…” and others facing medical challenges.
description: Voices in Bioethics, Archives (2013)
Liquid-gas phase transition at and below the critical point
Creators: name: Yukhnovskii, I. R.
name: Kolomiets, V. O.
name: Idzyk, I. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: This article is a continuation of our previous works (see Yukhnovskii I.R. et al., J. Stat. Phys, 1995, 80, 405 and references therein), where we have described the behavior of a simple system of interacting particles in the region of temperatures at and about the critical point, T \geqslant T_{c}. Now we present a description of the behavior of the system at the critical point (T_{c}, η_{c}) and in the region below the critical point. The calculation is carried out from the first principles. The expression for the grand canonical partition function is brought to the functional integrals defined on the set of collective variables. The Ising-like form is singled out. Below T_{c}, when a gas-liquid system undergoes a phase transition of the first order, i.e., boiling, a "jump" occurs from the "extreme" high probability gas state to the "extreme" high probability liquid state, releasing or absorbing the latent heat of the transition. The phase equilibria conditions are also derived.
description: 23 pages, 9 figures
Symmetric Toeplitz-Structured Compressed Sensing Matrices
Creators: name: Huang, Tao
name: Fan, Yi-Zheng
name: Zhu, Ming
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences
subject: H.1.1

description: How to construct a suitable measurement matrix is still an open question in compressed sensing. A significant part of the recent work is that the measurement matrices are not completely random on the entries but exhibit considerable structure. In this paper, we proved that the symmetric Toeplitz matrix and its transforms can be used as measurement matrix and recovery signal with high probability. Compared with random matrices (e.g. Gaussian and Bernullio matrices) and some structured matrices (e.g. Toeplitz and circulant matrices), we need to generate fewer independent entries to obtain the measurement matrix while the effectiveness of recovery does not get worse. Furthermore, the signal can be recovered more efficiently by the algorithm.
Light-cone Sum Rule Analysis of Semileptonic Decays $Λ_b^0 \to Λ_c^+ \ell^- \overlineν_\ell$
Creators: name: Duan, Hui-Hui
name: Liu, Yong-Lu
name: Huang, Ming-Qiu
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In this work, we analyze the semileptonic decay processes of $Λ_b \to Λ_c$ in the light-cone sum rule approach. In order to calculate the form factors of the $Λ_b$ baryon transition matrix element, we use the light-cone distribution amplitudes of $Λ_b$ obtained from the QCD sum rule in the heavy quark effective field theory framework. With the calculation of the six form factors of the $Λ_b \to Λ_c$ transition matrix element, the differential decay widths of $Λ_b^0 \to Λ_c^+ \ell^- \overlineν_\ell (\ell = e, ~μ, ~τ)$ and their absolute branching fractions are obtained. Additionally, the ratio of $R(Λ_c^+) \equiv \mathcal{B}r(Λ_b^0 \to Λ_c^+ τ^- \overlineν_τ)/\mathcal{B}r(Λ_b^0 \to Λ_c^+ μ^- \overlineν_μ)$ is also obtained in this work. Our results are in accord with the newest experimental result and other theoretical calculations and predictions.
description: 15 pages, 2 figures, 6 tables
Memory transfer optimization for a lattice Boltzmann solver on Kepler architecture nVidia GPUs
Creators: name: Mawson, Mark
name: Revell, Alistair
Publisher: name: arXiv
Year: 2013
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: The Lattice Boltzmann method (LBM) for solving fluid flow is naturally well suited to an efficient implementation for massively parallel computing, due to the prevalence of local operations in the algorithm. This paper presents and analyses the performance of a 3D lattice Boltzmann solver, optimized for third generation nVidia GPU hardware, also known as `Kepler'. We provide a review of previous optimisation strategies and analyse data read/write times for different memory types. In LBM, the time propagation step (known as streaming), involves shifting data to adjacent locations and is central to parallel performance; here we examine three approaches which make use of different hardware options. Two of which make use of `performance enhancing' features of the GPU; shared memory and the new shuffle instruction found in Kepler based GPUs. These are compared to a standard transfer of data which relies instead on optimised storage to increase coalesced access. It is shown that the more simple approach is most efficient; since the need for large numbers of registers per thread in LBM limits the block size and thus the efficiency of these special features is reduced. Detailed results are obtained for a D3Q19 LBM solver, which is benchmarked on nVidia K5000M and K20C GPUs. In the latter case the use of a read-only data cache is explored, and peak performance of over 1036 Million Lattice Updates Per Second (MLUPS) is achieved. The appearance of a periodic bottleneck in the solver performance is also reported, believed to be hardware related; spikes in iteration-time occur with a frequency of around 11Hz for both GPUs, independent of the size of the problem.
description: 12 pages
Channel Acquisition for HF Skywave Massive MIMO-OFDM Communications
Creators: name: Shi, Ding
name: Song, Linfeng
name: Zhou, Wenqi
name: Gao, Xiqi
name: Wang, Cheng-Xiang
name: Li, Geoffrey Ye
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, we investigate channel acquisition for high frequency (HF) skywave massive multiple-input multiple-output (MIMO) communications with orthogonal frequency division multiplexing (OFDM) modulation. We first introduce the concept of triple beams (TBs) in the space-frequency-time (SFT) domain and establish a TB based channel model using sampled triple steering vectors. With the established channel model, we then investigate the optimal channel estimation and pilot design for pilot segments. Specifically, we find the conditions that allow pilot reuse among multiple user terminals (UTs), which significantly reduces pilot overhead and increases the number of UTs that can be served. Moreover, we propose a channel prediction method for data segments based on the estimated TB domain channel. To reduce the complexity, we formulate the channel estimation as a statistical inference problem and then obtain the channel by the proposed constrained Bethe free energy minimization (CBFEM) based channel estimation algorithm, which can be implemented with low complexity by exploiting the structure of the TB matrix together with the chirp z-transform (CZT). Simulation results demonstrate the superior performance of the proposed channel acquisition approach.
description: 15 pages, 6 figures, accepted for publication in IEEE Transactions on Wireless Communications
Educating immigrants and Native Minorities in CUNY Community Colleges
Creators: name: Bailey, Thomas R.
name: Weininger, Elliot
Publisher: name: Columbia University
Year: 2002
Subjects: Community college students--Education
Community colleges

description: This CCRC Brief focuses on immigrant enrollment in community colleges and two-year associate degree programs in the senior colleges. Community colleges are designed to facilitate access to higher education for all groups, including individuals with weak academic skills, low incomes, and other characteristics that create barriers to further education. One of the goals of the study on which this Brief is based was to determine whether the two-year programs play this type of role in CUNY.
Coding based Data Broadcasting for Time Critical Applications with Rate Adaptation
Creators: name: Wang, Xiumin
name: Yuen, Chau
name: Xu, Yinlong
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, we dynamically select the transmission rate and design wireless network coding to improve the quality of services such as delay for time critical applications. In a network coded system, with low transmission rate and hence longer transmission range, more packets may be encoded, which increases the coding opportunity. However, low transmission rate may incur extra transmission delay, which is intolerable for time critical applications. We design a novel joint rate selection and wireless network coding (RSNC) scheme with delay constraint, so as to maximize the total benefit (where we can define the benefit based on the priority or importance of a packet for example) of the packets that are successfully received at the destinations without missing their deadlines. We prove that the proposed problem is NP-hard, and propose a novel graph model to mathematically formulate the problem. For the general case, we propose a transmission metric and design an efficient algorithm to determine the transmission rate and coding strategy for each transmission. For a special case when all delay constraints are the same, we study the pairwise coding and present a polynomial time pairwise coding algorithm that achieves an approximation ratio of 1 - 1/e to the optimal pairwise coding solution, where e is the base of the natural logarithm. Finally, simulation results demonstrate the superiority of the proposed RSNC scheme.
description: IEEE Transactions on Vehicular Technology
Spotlight on Fiction
Creators: name: Holmquist, Stephanie
Publisher: name: Voices in Bioethics
Year: 2013

description: In his most recent collection of short stories, The Tenth of December, George Saunders parodies the nullity of consumer culture and the bottomless anxieties of ordinary Joes and Joesephines caught living through the collapse of the middle class. His style is dark, twistedly funny and microscopically observed. In the story “Escape from Spiderhead,” we get a Saunderian glimpse into a near future of life style enhancement by cognitive pharmaceutical tweaks. We don’t see the new consumers of these wonder drugs. Saunders instead imagines for us hapless human subjects undergoing trials of new compounds like Verbaluce—a pharmaceutical enhancer of lucidity and verbal expression. Our protagonist tests out a new drug that intensifies the appreciation of nature. Under its influence, the garden looks “nice” and then: “He added some Verbaluce™ to the drip, and soon I was saying the same things, but saying them better… It was as if I could suddenly discern, in a contemporary vignette, the ancient corollary through which Plato and his ancient contemporaries might have strolled, to wit, I was sensing the eternal in the ephemeral.” Turn off the Verbaluce drip and the garden is again “nice”, not a Greek pastoral brought to life. Turn off the love drug and your new soul mate is once again “nothing special.” All is not enhancement in this brave new lab. “Darkenfloxx” is your blackest depression raised to the tenth power. A little “Docilryde” will make human subjects obey every order—but frustratingly requires special authorization from senior management. It’s just the trick when your subject is refusing to “Darkenfloxx” another subject for yet more data collection. “Escape from Spiderhead” represents a world of criminals trading out prison time to serve as research subjects in a dystopian Pharma-Industrial complex. Saunders gives us a rat’s-eye of view their servitude. They are means used to an end— the design of synthetic emotions and a chemical push against limits of free will.
description: Voices in Bioethics, Archives (2013)
Ethical Obligations to Psychopaths are Not Dependent on Development or Abuse
Creators: name: Yarmolinsky, Rachel
Publisher: name: Voices in Bioethics
Year: 2013

description: In their target article, What We Owe the Psychopath: A Neuroethical Analysis, Gillet and Huang make the case that psychopathy is caused by complex interactions which include genetic and environmental factors. However, their argument for the ethical treatment of psychopaths rests on psychopaths’ status as victims of abuse, and therefore that society has a moral obligation to psychopaths because of the presumably socially caused harm that underlies their illness. This argument is flawed. Communities do have a moral obligation to psychopaths, simply because they are human beings, and in particular human beings with a defective brain (for whatever reason). We don’t need to cast aside the deficit model in order to find an ethical reason to treat psychopaths as human beings. Neuroimaging is showing that indeed psychopaths do have different brains from non-psychopaths.[i] [ii] [iii] Here, I critique the target article in light of current knowledge about the development of psychopaths. There are psychopaths who have not suffered abuse during development.[iv] Are they somehow less worthy of understanding and treatment? The authors say that the psychopath seems ‘beyond empathy.’ The psychopath may not feel empathy, and we may have some difficulties feeling empathetic towards a psychopath because of their own lack. But as non-psychopaths we are capable of empathizing with a psychopath and capable of recognizing that we owe psychopaths no less than any other human beings are due. For a copy of the full article, please email ry2134@columbia.edu. http://www.tandfonline.com/doi/full/10.1080/21507740.2013.782920#.UkUbCIZvNCp [i] Kiehl, KA, et al (2001): Limbic abnormalities in affective processing by criminal psychopaths as revealed by functional magnetic resonance imaging. Biological Psychiatry 50:677–684 P [ii] Kiehl, KA (2006): A cognitive neuroscience perspective on psychopathy: Evidence for paralimbic system dysfunction. Psychiatry Research 142:107–128 [iii] Glenn, AL, et al (2010): Increased volume of the striatum in psychopathic individuals. Biological Psychiatry 67:52–58 [iv] Hare, Robert (1993): Without Conscience. The Guildford Press, New York, NY
description: Voices in Bioethics, Archives (2013)
The Potential of Community Colleges as Bridges to Opportunity for the Disadvantaged: Can it be Achieved on a Large Scale?
Creators: name: Jenkins, Paul Davis
Publisher: name: Columbia University
Year: 2003
Subjects: Community college students--Education
Community colleges

description: Community colleges are receiving increased attention from policy groups and funders concerned with alleviating poverty because of their potential for expanding access by disadvantaged individuals to post-secondary education and careers. To many in community college world, this attention may seem curious, since most community colleges have long served disadvantaged students. In fact, many if not most of the millions of students community colleges serve each year face at least some barriers to success in education and employment. It is precisely because community colleges serve such large numbers of disadvantaged students that they are receiving so much attention. This interest is piqued in part by frustration among many in the anti-poverty field of the relatively small scale of efforts successful in enabling working poor individuals to advance to jobs that pay family-supporting wages. The central argument is that most community colleges fail to fully realize their bridging potential for two main reasons. First, many find it difficult to make the connections – between remedial and college-credit programs, between academic and occupational degree programs and between degree programs and jobs – that are necessary for creating pathways of advancement for disadvantaged students. Second, it is obviously expensive to serve disadvantaged students and yet community colleges tend to be poorly funded. In the hierarchy of community college programs, those that serve disadvantaged students are the least well funded. As a result, many community colleges opt to focus their limited resources on serving more advantaged students in programs popular with employers and policy makers, rather than to risk serving students whose success is by no means assured.
Aging effects in Schelling Segregation model
Creators: name: Abella, David
name: Miguel, Maxi San
name: Ramasco, José J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The Schelling model has become a paradigm in social sciences to explain the emerge of residential spatial segregation even in the presence of high tolerance to mixed neighborhoods by the side of citizens. In particular, we consider a noisy constrained version of the Schelling model, in which agents maximize its satisfaction, related to the composition of the local neighborhood, by infinite-range movements towards satisfying vacancies. We add to it an aging effect by making the probability of agents to move inversely proportional to the time they have been satisfied in their present location. This mechanism simulates the development of an emotional attachment to a location where an agent has been satisfied for a while. The introduction of aging has several major impacts on the model statics and dynamics: the phase transition between a segregated and a mixed phase of the original model disappears, and we observe segregated states with high level of agent satisfaction even for high values of the tolerance. In addition, the new segregated phase is dynamically characterized by a slow power-law coarsening process and by a glassy-like dynamics in which the asymptotic time translational invariance is broken.
description: 10 pages, 5 Figures
Only Don’t Know
Creators: name: Anekwe, Obiora
Publisher: name: Voices in Bioethics
Year: 2013

description: Alix Ankele began her professional career as a psychiatric social worker in New York City. But when she and her husband moved to Kenya, where he worked in media, her exposure to batik art shifted her life. “Art set my soul. It was a way of connecting through my heart”, recalls Ankele. Union Theological Seminary’s James Memorial Chapel will be the location of an exhibition of artist Alix Ankele’s monumental work on display from September 9-November 1, 2013. Although Ankele has been creating art for some time now, she began to make abstract art because it presented an intuitive process to painting rather than creating artwork from a structured conceptual mindset. Her pieces are mostly large in scale, abstractly structured, and vividly colored in expression. The title of her recent art exhibition, “Only Don’t Know”, refers to a Korean Zen master who promoted open-mindedness without a sense of coming to our own prejudged conclusions. This sense of being is most pertinent to Bioethics, which is based on a multidisciplinary approach that is based on seeing ethical realities as such rather than viewing them as we think they should be. Ankele’s work stresses the interconnectedness of who we are and our inseparableness to our universe. One striking piece entitled, “cross of the moment” speaks to the words of one of the 20th century’s most morally conscious poets, W.H. Auden: “We would rather be ruined than changed. We would rather die in our dread than climb the cross of the moment and let our illusions die.” Auden’s nuances reflect how terminal illness can affect a patient’s innermost thoughts that are never mentioned. In her work, “easter morning”, we are called to ponder upon and keep open to a sense of a new beginning or fresh start. But Ankele also challenges us to reflect upon collective and unconscious memory as observed in neuroscience and psychiatric medicine. Freedom and emancipation is transparently interpreted in Ankele’s 2013 piece, “todatsu”, reverberating one of bioethics most pertinent ethical principles-autonomy. After walking away from Alix Ankele’s multi-layered and highly global exhibition reflecting life, death, and new beginnings-all significant to human existence- I felt spontaneously uplifted, vividly transformed, and rightfully moved.
description: Voices in Bioethics, Archives (2013)
The Effects of Institutional Factors on the Success of Community College Students
Creators: name: Bailey, Thomas R.
name: Calcagno, Juan Carlos
name: Jenkins, Paul Davis
name: Kienzl, Gregory S.
name: Leinbach, D. Timothy
Publisher: name: Columbia University
Year: 2005
Subjects: Community college students--Education
Community colleges

description: The goal of this study is to determine the institutional characteristics that affect the success of community college students as measured by the individual student probability of completing a certificate or degree or transferring to a baccalaureate institution. While there is extensive research on the institutional determinants of educational outcomes for K-12 education and a growing literature on this topic for baccalaureate institutions, few researchers have attempted to address the issue for community colleges. Using individual level data from the National Education Longitudinal Study of 1988 (NELS:88) and institutional level data from the Integrated Postsecondary Education Data System (IPEDS), the authors address two methodological challenges associated with research on community college students: unobserved institutional effects and attendance at multiple institutions. The most consistent results across specifications are the negative relationship between individual success and larger institutional size, and the proportion of part-time faculty and minority students.
Electronic chemical potentials of porous metal-organic frameworks
Creators: name: Butler, Keith T.
name: Hendon, Christopher H.
name: Walsh, Aron
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The binding energy of an electron in a material is a fundamental characteristic, which determines a wealth of important chemical and physical properties. For metal-organic frameworks this quantity is hitherto unknown. We present a general approach for determining the vacuum level of porous metal-organic frameworks and apply it to obtain the first ionisation energy for six prototype materials including zeolitic, covalent and ionic frameworks. This approach for valence band alignment can explain observations relating to the electrochemical, optical and electrical properties of porous frameworks.
Composite and elementary nature of a resonance in the sigma model
Creators: name: Nagahiro, Hideko
name: Hosaka, Atsushi
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We analyze the mixing nature of the low-lying scalar resonance consisting of the pipi composite and the elementary particle within the sigma model. A method to disentangle the mixing is formulated in the scattering theory with the concept of the two-level problem. We investigate the composite and elementary components of the sigma meson by changing a mixing parameter. We also study the dependence of the results on model parameters such as the cut-off value and the mass of the elementary sigma meson.
description: 13 pages, 11 figures, 2 tables
Formative Evaluation of the Student Achievement Initiative “Learning Year”
Creators: name: Jenkins, Paul Davis
name: Ellwein, Todd
name: Boswell, Katherine
Publisher: name: Columbia University
Year: 2008
Subjects: Community college students--Education
Community colleges

description: In 2007, the Washington State Board for Community and Technical Colleges launched the Student Achievement Initiative (SAI), a system-wide policy to reward colleges for improvements in student achievement. This report lays out results of CCRC’s qualitative review of SAI during its first year (2007-08). The purpose of the evaluation was to assess the extent of awareness and understanding of the initiative among college personnel and examine the initial responses to it by the colleges.