Miracle-dz/UniFAR-FTUs huggingface dataset:
Robust regularized ZF in decentralized Broadcast Channel with correlated CSI noise

We consider in this work the Distributed Channel State Information (DCSI) Broadcast Channel (BC) setting, in which the various Transmitters (TXs) compute elements of the precoder based on their individual estimates of the global multiuser channel matrix. Previous works relative to the DCSI setting assume the estimation errors at different TXs to be uncorrelated, while we consider in contrast in this work that the CSI noises can be correlated. This generalization bridges the gap between the fully distributed and the centralized setting, and offers an avenue to analyze partially centralized networks. In addition, we generalize the regularized Zero Forcing (ZF) precoding by letting each TX use a different regularization coefficient. Building upon random matrix theory tools, we obtain a deterministic equivalent for the rate achieved in the large system limit from which we can optimize the regularization coefficients at different TXs. This extended precoding scheme in which each TX applies the optimal regularization coefficient is denoted as “DCSI Regularized ZF” and we show by numerical simulations that it allows to significantly reduce the negative impact of the distributed CSI configuration and is robust to the distribution of CSI quality level across all TXs.
The NSB control for 3-dimensional flocking of multi-robot systems

This paper deals with the flocking problem of a multi-robot system, that is, making the robots of a team grouping together. The flocking behavior is achieved resorting to the null-space-based behavioral control by defining very simple behaviors for each robot and properly arranging them in priority. The algorithm, making the robots using only local information, successfully achieves the flocking mission with or without a rendezvous point and in eventual presence of obstacles. Extensive simulations, assuming 2 and 3-dimensional point-mass agents, prove the effectiveness of the proposed algorithm.
Spatial Learning Impairment, Enhanced CDK5/p35 Activity, and Downregulation of NMDA Receptor Expression in Transgenic Mice Expressing Tau-Tubulin Kinase 1

Tau-tubulin kinase-1 (TTBK1) is involved in phosphorylation of tau protein at specific Serine/Threonine residues found in paired helical filaments, suggesting its role in tauopathy pathogenesis. We found that TTBK1 levels were upregulated in brains of human Alzheimer' disease (AD) patients compared with age-matched non-AD controls. To understand the effects of TTBK1 activation in vivo, we developed transgenic mice harboring human full-length TTBK1 genomic DNA (TTBK1-Tg). Transgenic TTBK1 is highly expressed in subiculum and cortical pyramidal layers, and induces phosphorylated neurofilament aggregation. TTBK1-Tg mice show significant age-dependent memory impairment as determined by radial arm water maze test, which is associated with enhancement of tau and neurofilament phosphorylation, increased levels of p25 and p35, both activators of cyclin-dependent protein kinase 5 (CDK5), enhanced calpain I activity, and reduced levels of hippocampal NMDA receptor types 2B (NR2B) and D. Enhanced CDK5/p35 complex formation is strongly correlated with dissociation of F-actin from p35, suggesting the inhibitory mechanism of CDK5/p35 complex formation by F-actin. Expression of recombinant TTBK1 in primary mouse cortical neurons significantly downregulated NR2B in a CDK5- and calpain-dependent manner. These data suggest that TTBK1 in AD brain may be one of the underlying mechanisms inducing CDK5 and calpain activation, NR2B downregulation, and subsequent memory dysfunction.
Septum-Based Mammaplasty: A Surgical Technique Based on Würinger's Septum for Breast Reduction

Background: During the past 7 years, the senior author (M.H.) has been performing septum-based mammaplasty. The aim of this article is to report the safety and ease of breast shaping by using this technique. Methods: A series of 110 consecutive patients underwent septum-based breast reduction performed by a single surgeon. This technique uses a lateral or medial pedicle based on Würinger's horizontal septum, which carries the main nerve supply to the nipple in addition to intercostal perforators. Results: Mean nipple-to-sternal notch distance was 33 cm (range, 22 to 45 cm). Mean resection was 658 g (range, 160 to 1980 g). Nipple elevation was 9 cm on average (range, 3 to 17 cm). A retroareolar hematoma occurred in three breasts. Total areola necrosis occurred in one breast (0.5 percent) as a result of an infection in a diabetic patient. Limited wound dehiscence occurred in 15 breasts (7.7 percent). A secondary scar revision was needed in 10 patients (9 percent). One patient required a revision. Conclusions: Based on a well-vascularized and constant anatomical septum, a septum-based pedicle is safe, even in large breasts. This technique is safe and demonstrates ease of pedicle shaping and breast remodeling in patients undergoing reduction mammaplasty.
Botilbud til mennesker med demens

Bakgrunn: Demens er en samlebetegnelse pa en rekke sykdommer som varig nedsetter mental kapasitet, og er sannsynligvis den viktigste arsaken til funksjonshemning hos eldre. For a malrette og tilpasse det kommunale omsorgstjenestetilbudet bedre til personer med demens og sammensatte lidelser, har regjeringen i 2008 iverksatt et utred-ningsarbeid for a utvikle et sterkere kunnskapsgrunnlag knyttet til konkret utfor-ming av boog institusjonstilbud. Metode: Det ble utfort systematiske sok i folgende databaser t.o. m. 14.01. 2009: Cochrane Da-tabase of Systematic Reviews, Cochrane CENTRAL, DARE (Database of Abstracts of Reviews of Effects), HTA, MEDLINE, EMBASE, PsycINFO, SveMed, OT Seeker og SINTEF Byggforsk publikasjoner for a identifisere systematiske oversiktsartikler og primaerstudier. I tillegg ble det utfort manuelle sok i referanselistene i relevante rap-porter og ekskluderte oversiktsartikler. Resultat: Soket resulterte i 3388 unike titler. Etter gjennomlesning av tittel og sammendragene ble 161 titler identifisert som mulig relevante og innhentet i fulltekst. Ytterligere 53 artikler ble innhentet etter manuelle sok i referanselister. Botilbud til mennesker med demens
Revisiting hardware-assisted page walks for virtualized systems

Recent improvements in architectural supports for virtualization have extended traditional hardware page walkers to traverse nested page tables. However, current two-dimensional (2D) page walkers have been designed under the assumption that the usage patterns of guest and nested page tables are similar. In this paper, we revisit the architectural supports for nested page table walks to incorporate the unique characteristics of memory management by hypervisors. Unlike page tables in native systems, nested page table sizes do not impose significant overheads on the overall memory usage. Based on this observation, we propose to use flat nested page tables to reduce unnecessary memory references for nested walks. A competing mechanism to HW 2D page walkers is shadow paging, which duplicates guest page tables but provides direct translations from guest virtual to system physical addresses. However, shadow paging has been suffering from the overheads of synchronization between guest and shadow page tables. The second mechanism we propose is a speculative shadow paging mechanism, called speculative inverted shadow paging, which is backed by non-speculative flat nested page tables. The speculative mechanism provides a direct translation with a single memory reference for common cases, and eliminates the page table synchronization overheads. We evaluate the proposed schemes with the real Xen hypervisor running on a full system simulator. The flat page tables improve a state-of-the-art 2D page walker with a page walk cache and nested TLB by 7%. The speculative shadow paging improves the same 2D page walker by 14%.
Context-awareness on mobile devices - the hydrogen approach

Information about the user's environment offers new opportunities and exposes new challenges in terms of time-aware, location-aware, device-aware and personalized applications. Such applications constantly need to monitor the environment - called context - to allow the application to react accordingly to this context. Context-awareness is especially interesting in mobile scenarios where the context of the application is highly dynamic and allows the application to deal with the constraints of mobile devices in terms of presentation and interaction abilities and communication restrictions. Current context-aware applications often realize sensing of context information in an ad hoc manner. The application programmer needs to deal with the supply of the context information including the sensing of the environment, its interpretation and its disposal for further processing in addition to the primary purpose of the application. The close interweavement of device specific context handling with the application obstructs its reuse with other hardware configurations. Recently, architectures providing support for context-aware applications have been developed. Up to now such architectures are not trimmed to the special requirements of mobile devices regarding particularly the limitations of network connections, limited computing power and the characteristics of mobile users. This paper proposes an architecture and a software framework - the hydrogen context framework -which support context-awareness for considering these constraints. It is extensible to consider all kind of context information and comprises a layered architecture. To prove the feasibility the framework has been implemented to run on mobile devices. A context-aware postbox is realized to demonstrate the capabilities of the framework.
A Teacher Who Looks Like Me

Professors Goodman and Redfield focus on the significance of the look of the faculty for successful student outcomes and then discuss possible “makeovers” to that look, both short and long-term. Part I discusses diversity in terms of numbers and briefly summarizes the history and other research literature on the importance of faculty diversity in law schools. Part II moves beyond just numbers to inclusive excellence and engagement and analyzes the particular manifestations of inadequate faculty diversity, addressing not only the student perspective, but also perspectives of faculty, administrators, and the larger communities with which they interact. This Part also includes an exploration of the culture of integration in law schools and the psychological research on how greater diversity lessens biases and permits a critical reframing of conventional approaches to education. Part III addresses how to change a faculty look and offers an approach to surveying existing resources and redeploying them to maximize benefits of diversity. This Part also explains the impact of faculty diversity on the goal of inclusive excellence, focusing on the climate, environment, and pedagogical issues that revolve around diversity. Recognizing that the obvious answer is not the immediately practical one, Part III.B provides a step-by-step approach of identifying and publicizing diversity goals, surveying human and other resources and considering other assets, and otherwise implementing identified strategies to maximize the school's manifestation of diversity characteristics, and thereby augment existing diversity. When hiring opportunities are infrequent, or non-existent, these strategies can showcase the school's current level of diversity in a more positive light and bring about some real change (short of new hires). The long-term goal is to hire more so you can more easily be diverse and inclusive for the educational benefit of our communities.
Sweetening the deal? Sugar daddies, sugar mummies, sugar babies and HIV in contemporary South Africa

abstract In January 2012, the KwaZulu-Natal MEC for Health, Dr Sibongiseni Dhlomo, announced the launch of a comprehensive campaign on ‘Sugar daddies’ to stigmatise cross-generational sex, promote healthy living and encourage new and more ‘appropriate’ behaviours for community members. This Open Forum examines the phenomena of sugar daddies, sugar mamas and sugar babies, both in opposite and same-sex contexts. It raises critical issues such as what is the historical context of intergenerational intimacy in South Africa and how do contemporary manifestations reflect or diverge from the past? Has the HIV epidemic shone a light on this phenomenon in helpful ways or has it contributed to a ‘moral panic’ which has characterised so many HIV responses in South Africa? Are current attempts to address trans/cross generational sex likely to succeed and could stigmatising a fairly common practice have unintended consequences? These and other questions are discussed in ways which we believe could contribute to a more critical and reflective analysis of gender, power and context and sexuality.
Therapist Adherence and Competence as Predictors of Client Outcomes in Adolescent Substance Use Treatment

Central to the debate over the implementation of empirically supported treatments is whether or not therapist skill in delivering these therapies has a measurable, positive relationship with client outcome. The fidelity and skill with which therapists deliver these treatments have been studied under the constructs of therapist adherence and competence. There has been mixed evidence of the relationship between adherence and competence and client outcomes, that could be due to small sample sizes, potentially inadequate measures for rating therapists' skill, and limited statistical methods. The current study utilized a data set from the Adolescent and Family Treatment (AAFT) project in which 91 therapists provided services to 384 clients at regionally diverse sites. Substance abuse therapists trained to deliver the Adolescent Community Reinforcement Approach (A-CRA) submitted audiotaped therapy sessions to expert raters for review. Measures of adherence and competence derived from these ratings were examined in a Multi-Level Model, for associations with client substance use outcomes at 3, 6 and 12-month follow-up periods. This study found that therapist competence was significantly predictive of decreases in clients’ days of substance
Parallel evolution of angiosperm colour signals: common evolutionary pressures linked to hymenopteran vision

Flowering plants in Australia have been geographically isolated for more than 34 million years. In the Northern Hemisphere, previous work has revealed a close fit between the optimal discrimination capabilities of hymenopteran pollinators and the flower colours that have most frequently evolved. We collected spectral data from 111 Australian native flowers and tested signal appearance considering the colour discrimination capabilities of potentially important pollinators. The highest frequency of flower reflectance curves is consistent with data reported for the Northern Hemisphere. The subsequent mapping of Australian flower reflectances into a bee colour space reveals a very similar distribution of flower colour evolution to the Northern Hemisphere. Thus, flowering plants in Australia are likely to have independently evolved spectral signals that maximize colour discrimination by hymenoptera. Moreover, we found that the degree of variability in flower coloration for particular angiosperm species matched the range of reflectance colours that can only be discriminated by bees that have experienced differential conditioning. This observation suggests a requirement for plasticity in the nervous systems of pollinators to allow generalization of flowers of the same species while overcoming the possible presence of non-rewarding flower mimics.
Design Education in Architecture: A Psychosocial Analysis

Despite strong criticism of the design studio as a method of teaching and learning, little work has been conducted in evaluating its effectiveness and efficiency. In an attempt to instigate such investigation, this Paper highlights the need for the learning environment to be conceptualised holistically with attention paid to such influential variables as the nature of the content and task; the characteristics of the students and the teacher; and the psychosocial aspects of person-environment interaction. Particular attention is paid to the role of classroom climate studies in facilitating and assessing changes to the learning environment.
Application of a fractional advection‐dispersion equation

A transport equation that uses fractional‐order dispersion derivatives has fundamental solutions that are Lévy's α‐stable densities. These densities represent plumes that spread proportional to time 1/α, have heavy tails, and incorporate any degree of skewness. The equation is parsimonious since the dispersion parameter is not a function of time or distance. The scaling behavior of plumes that undergo Lévy motion is accounted for by the fractional derivative. A laboratory tracer test is described by a dispersion term of order 1.55, while the Cape Cod bromide plume is modeled by an equation of order 1.65 to 1.8.
Has demand outpaced supply for clinical trial participants?

6016 Background: Current estimates are less than 5% of adult cancer patients participate in clinical trials. Initiatives to address barriers to accrual (such as age, physician bias, etc) are ongoing. However, with more drugs in the pipeline and more clinical trials being conducted, demand for trial participants may be outpacing the current "supply". METHODS The ClinicalTrials.gov database, maintained by National Institutes of Health was selected for review on the basis that it is proposed to be the mandated repository for clinical trials information. Over a 2 month period, the database was mined for all active, US recruiting, phase I, I/II, II, and III trials in breast, lung, and prostate cancers. RESULTS There were 290 breast, 212 lung, and 177 prostate cancer trials with the prespecified criteria. The number of patients needed to complete these trials is 151,311 (breast), 33,498 (lung), and 53,181 (prostate). These represent 19.4% to 71.6% of the American Cancer Society incidence estimates of the studied tumors. NCI, industry, and academia sponsored, either solely or in collaborations, 42.1%, 26.5%, and 45.6% of trials, respectively. Majority of studies were phase II (51%), with 11.5% phase I, and 15.6% phase III. Remaining studies were either combined phase I/II studies or not specified. Significant percentage of trials involved pts with advanced/metastatic disease (54% breast, 51.4% lung, and 44.6% prostate). CONCLUSIONS Although many studies have anticipated enrollment period over several years, the number of trial participants needed to complete these studies is quite daunting. Our results are likely under-estimates as not all studies currently enrolling patients may be included in this registry, and not all studies in the database specified the recruitment goal. Although not all trial participants are drawn from the incidence numbers, it is clear that given the current trial participation rate, demand has outpaced the supply. The medical community has the ethical responsibility to ensure sufficient patient enrollment for clinical trials. In addition to addressing accrual barriers, the authors encourage the establishment of a task force including academia, government, and industry to systematically evaluate and prioritize the types of trials being conducted. No significant financial relationships to disclose.
Implementation of an IEEE 802 . 11 a synchronizer

This paper applies some of the work that has been conducted regarding timing synchronization and carrier frequency offset estimation and correction in OFDM to the IEEE802.11a standard for wireless LAN. The algorithms are implemented as a floating-point model in Matlab using Simulink and as a synthesizable fixed-point model (FPGA) using Xilinx System Generator.
Réseaux de co-citations et Open Access : pour un renouveau des méthodes d'évaluation

Depuis quelques annees, la methodologie en matiere d'evaluation des publications scientifiques fait l'objet d'une reflexion accrue, tant de la part des chercheurs que des professionnels de la documentation appeles a l'appliquer. Le modele classique, en usage dans la majorite des instances administratives, emanant de l'Institute for Scientific Information de Philadelphie (ISI) revele un certain nombre de limites notamment dues a l'absence de nuances et a des modes de calcul bruts qui semblent privilegier l'aspect comptable et quantitatif au detriment de la qualite. Les modeles alternatifs proposent l'application fine et nuancee de la methode mathematique de la " marche aleatoire " (random walk) avec l'execution iterative de l'algorithme de Lawrence Page (utilise par Google pour le tri et l'affichage des pages Web) algorithme pondere connu sous l'appellation Weighted PageRank. Associee a la detection des co-citations, cette methode permet de visualiser des colleges invisibles, des affinites entre titres de periodiques et surtout la tracabilite des citations. Celle-ci est determinante dans la definition qualitative de l'evaluation qui semble minoree dans le modele classique.
Preferred tempo reconsidered.

In the current literature preferred tempo is usually located around 100 bpm (600 ms) (Fraisse, 1982). We will give a review of more recent experimental evidence and present a series of experiments and analyses of existing data that show that preferred tempo is located at a significantly faster speed. It will be shown that it is located somewhere between 120 and 130 bpm, so 500 ms (120 bpm) is more realistic as characteristic period for preferred tempo. The existence of this optimum in tempo perception and production will be used to support the resonance theory of tempo perception (Van Noorden & Moelants, 1999), according to which tempo perception and production is closely related to natural movement, with humans functioning as a kind of resonating systems with a natural frequency.
The response of the human organism to ionospheric changes

The impact of the environment upon living organisms constitutes a crucial problem examined by today's science. Detailed examination of the overall influence of environmental factors upon humans is performed within, for example, a large number of medical disciplines. By extension, research institutes worldwide have analyzed diverse positive and negative factors affecting the biological system of the human body; one such factor consists in the influence of the surrounding electromagnetic field. This paper presents the results of an investigation focused on ionosphere parameter changes and their significance for the basic functioning of the nervous system. Let us note in this connection that the frequency of the alpha waves of an active brain [1] ranges between 6 and 8 Hz and that, interestingly, changes in the electromagnetic and chemical structure of the Earth's surface may cause variation of signals in the given frequency region. Within the present article and the related research [2, 5-7], the authors evaluate very low frequencies of the electromagnetic field, applying suitable theoretical and experimental procedures to define the effects that influence brain activity.