Miracle-dz/UniFAR-FTUs huggingface dataset:
MIMO CHANNEL CAPACITY : ELECTROMAGNETIC WAVE PERSPECTIVE

Radio propagation channel has a profound impact on the MIMO channel capacity. Under favourable conditions (i.e., uncorrelated high-rank channel or rich scattering), the MIMO capacity scales roughly linearly as the number of Tx/Rx antennas. However, the channel correlation decreases the capacity and, at some point, it is the dominant effect. This effect received considerable attention in recent years. Two main approaches have been adopted to study it and to predict the system performance in realistic scenarios: the eigenvalue (or SVD) decomposition approach [1, 2] and the correlation matrix approach [3-8]. Some practical design guidelines have been developed as well. In this paper, we consider the effect of correlation from a completely different perspective. Specifically, we consider the constrains imposed by the laws of electromagnetism on achievable MIMO capacity in its most general form. To accomplish this, we define the spatial capacity as the maximum of the conventional MIMO capacity (per unit bandwidth, i.e. bits/s/Hz) over possible propagation channels, subject to some constrains. We show that, at least in some scenarios, this maximum exists and it provides new insight into the notion of channel capacity when electromagnetic waves are used as the carrier of information.
Analysis of Factors Inﬂuencing Students’ Access to Mathematics Education in the Form of MOOC

: Restricting the movement of students because of COVID-19 requires expanding the o ﬀ er of online education. Online education should reﬂect the principles of pedagogical constructivism to ensure the development of students’ cognitive and social competencies. The paper describes the preparatory course of mathematics, realized in the form of MOOC. This course was created and implemented based on the principles of pedagogical constructivism. The analysis of the respondents’ approach to MOOC revealed a di ﬀ erence between bachelor and master students in the use of MOOC. Bachelors found a strong correlation between their approach to MOOCs and the way they are educated in secondary schools. The results of the research point to the need of more emphasis should be placed on advancing the learner’s skills in navigating and analysing information. The questionnaire ﬁlled in by the participants also monitored the students’ access to learning. The results of the experiment conﬁrmed the connection between the preferred approach to learning and students’ activities within the MOOC.
Revisiting the Heavy Rainfall Event over Northern Taiwan on 3 June 1984

In this study, the mechanisms for the development of a localized heavy rainfall event during the evening of 2 June to the early morning of 3 June 1984 over northern Taiwan are investigated. This event occurred under favorable large-scale conditions including: upper-level divergence; low-level high equivalent potential temperature; low levels of free convection; and subsynoptic-scale ascending motion over the northern Taiwan Strait and northern Taiwan associated with a baroclinic front. In the late night of 2 June, pre-existing rainfall is simulated to the southeast of a trough axis over the southeastern China coast as well as in the frontal zone north of Taiwan. The pre-existing rainfall is enhanced as it moves over the northeastern Taiwan Strait where the prevailing southwesterly winds within the Taiwan Strait converge with the orographically deflected flow with a southerly wind component off the western/northwestern Taiwan coast. As the pre-existing convective rainfall continues to move toward northern Taiwan, it is further enhanced in a localized low-level convergence zone over the northwestern coast where a barrier jet along the coast converges with the northwesterly winds behind the surface front. Furthermore, on the morning of 3 June, focusing of rainfall is simulated where the barrier jet encounters the leading edge of the cold pool caused by rain evaporative cooling. As the convective rainfall areas drift inland, the orographic lifting of the pre-frontal southwesterly flow over the slopes south of the Taipei Basin also plays a role in the simulated enhanced heavy rainfall there.
A decoupled kinematic model for active normal faults: Insights from the 1980, MS = 6.9 Irpinia earthquake, southern Italy

A significant uncertainty exists in the definition of both surface pattern and subsurface continuity (i.e., coupling vs. decoupling) of active normal faults in the Apennines. In this study, we investigated the epicentral area of the M S = 6.9, 1980 Irpinia earthquake—one of the most destructive historical earthquakes in Italy—based on detailed topography analyses, morphostratigraphic and structural data, and new age constraints from Quaternary deposits. The active tectonic behavior of the study area is controlled by a series of subparallel, mainly WNW-ESE– to NW-SE–trending, dominantly extensional faults spanning over the southern Apennines axial belt. A large part of the active fault strands is characterized by a subdued topographic expression, as a result of the young age of extensional faulting initiation, and of relatively low mean slip rates. In addition, as already known from long historical seismicity records elsewhere, long-lasting quiescence might alternate with clusters of closely spaced, strong earthquakes. The long-term morphostratigraphic record confirms that long-lasting quiescence may punctuate fault activity, with major implications for seismic hazard assessment. The relatively small-sized cumulative fault throws estimated by surface evidence contrast with subsurface information provided by crustal-scale cross sections and seismological evidence, which both suggest the occurrence at depth of large-displacement, mature fault zones capable of nucleating large earthquakes. Furthermore, although the surface distribution of active fault strands overlaps the belt affected by present-day low-magnitude seismicity and by large historical earthquakes, a mismatch in the attitude and kinematics of shallow versus deep faults is unraveled by a comparison of surface geological versus seismological data sets. This feature suggests a decoupling between surface and deep fault zones, and that outcropping fault planes cannot always be straightforwardly traced down to hypocentral depths, particularly in fold-and-thrust belts characterized by strong rheological contrasts. On the other hand, stress inversion from outcropping active faults and from earthquake focal mechanisms indicates a general consistency of the stress field, thus suggesting that a homogeneous late Quaternary extensional regime produces complex reactivation of the inherited, articulated fault network affecting different structural levels of the southern Apennines.
A dynamic modelling of the key quality management factors affecting students' satisfaction in the Egyptian public higher education

The study aims at developing a system dynamics model for investigating the critical success factors of total quality management affecting students 'satisfaction within the new Engineering programs in the Egyptian public higher education. Different simulation scenarios were made to determine the success factors which improve the students 'satisfaction within the new Engineering programs. The research sampling was designed based on the cluster sampling. Accordingly, the faculties of Engineering in Alexandria University and Helwan University were selected by the technique of cluster random sampling. So, ten New Academic Programs of the engineering sector in both Alexandria University and Helwan University were randomly selected to measure the impact of critical success factors of Total Quality Management on students 'satisfaction. The dynamic hypothesis and simulation model were formulated based on the literature and Group Model Building as primary data. Further, the sources of secondary data collection included internal sources from the records and database in the new Engineering programs and external sources from the records and databases in several governmental bodies in Egypt such as the management of public universities, the projects management unit, and the Ministry of Higher Education. The validation of the dynamic model was confirmed by using the real data in the last two years. The tests series of the system dynamics model were made by using the latest release of Powersim Studio 10 software. The results of the study identified several success factors of quality management significantly affecting students' satisfaction within the engineering public higher education through using one of the system dynamics tests, such as a what-if scenarios test, on the model. These factors included the percentage of Ph.D. holders, facilities cost per student, quality of teaching, and quality of student learning. General recommendations were made to the Egyptian Ministry of Higher Education concerning the improvement of students 'satisfaction.
Title Time-varying Risk Aversion : an Application to Energy Hedging Time Varying Risk Aversion: an Application to Energy Hedging*

*The authors would like to thank participants at a University College Dublin seminar for their comments on an earlier draft. Part of this study was carried out while Cotter was visiting the UCLA Anderson School of Management and is thankful for their hospitality. Cotter's contribution to the study has been supported by a University College Dublin School of Business research grant. The authors thank two anonymous referees for very helpful comments but the usual caveat applies. Abstract Risk aversion is a key element of utility maximizing hedge strategies; however, it has typically been assigned an arbitrary value in the literature. This paper instead applies a GARCH-in-Mean (GARCH-M) model to estimate a time-varying measure of risk aversion that is based on the observed risk preferences of energy hedging market participants. The resulting estimates are applied to derive explicit risk aversion based optimal hedge strategies for both short and long hedgers. Out-of-sample results are also presented based on a unique approach that allows us to forecast risk aversion, thereby estimating hedge strategies that address the potential future needs of energy hedgers. We find that the risk aversion based hedges differ significantly from simpler OLS hedges. When implemented in-sample, risk aversion hedges for short hedgers outperform the OLS hedge ratio in a utility based comparison.
: Professional opacity, duality, and ambiguity—A response to Noordegraaf

In this comment to Noordegraaf’s ‘Protective or connective professionalism? How connected professionals can (still) act as autonomous and authoritative experts’, we argue that Noordegraaf has contributed signiﬁcant insights into the development of contemporary professionalism. However, we argue for a less binary and more complex view of forms of professionalism, and for ﬁnding ways of understanding professionalism grounded in a relational view of everyday professional work. The ﬁrst section (by Johan Alvehus) suggests that Noordegraaf’s ‘connective professionalism’ is primarily about new ways of strengthening professionalism’s protective shields by maintaining functional ambiguity and transparent opacity around professional jurisdictions. The second section (by Amalya Oliver and Netta Avnoon) argues for viewing professionalism on a range of protection–connection and offers an approach for understanding how connective and protective models co-occur. Both commentaries thus take a relational, dynamic, and somewhat skeptical view on the reproduction and maintenance of professionalism.
and high-resolution X-ray CT reveals five new cryptic species and multiple hybrid zones among Australian earless dragons

Cryptic lineages, comprising species complexes with deep genetic structuring across the landscape but without distinct morphological differences, impose substantial difficulties for systematists and taxonomists in determining true species diversity. Here, we present an integrative approach that combines data from phylogeography and geometric morphometric analyses of three-dimensional cranial models to revisit the uncertain taxonomy of earless dragons from southern and central
Psychological interventions for coronary heart disease.

BACKGROUND Psychological symptoms are strongly associated with coronary heart disease (CHD), and many psychological treatments are offered following cardiac events or procedures. OBJECTIVES Update the existing Cochrane review to (1) determine the independent effects of psychological interventions in patients with CHD (principal outcome measures included total or cardiac-related mortality, cardiac morbidity, depression, and anxiety) and (2) explore study-level predictors of the impact of these interventions. SEARCH STRATEGY The original review searched Cochrane Controleed Trials Register (CCTR, Issue 4, 2001), MEDLINE, EMBASE, PsycINFO, and CINAHL to December 2001. This was updated by searching the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE and EMBASE, PsycINFO and CINAHL from 2001 to January 2009. In addition, we searched reference lists of papers, and expert advice was sought for the original and update review. SELECTION CRITERIA Randomised controlled trials of psychological interventions compared to usual care, administered by trained staff. Only studies estimating the independent effect of the psychological component with a minimum follow-up of six months. Adults with specific diagnosis of CHD. DATA COLLECTION AND ANALYSIS Titles and abstracts of all references screened for eligibility by two reviewers independently; data extracted by the lead author and checked by a second reviewer. Authors contacted where possible to obtain missing information. MAIN RESULTS There was no strong evidence that psychological intervention reduced total deaths, risk of revascularisation, or non-fatal infarction. Amongst a smaller group of studies reporting cardiac mortality there was a modest positive effect of psychological intervention (relative risk: 0.80 (95% CI 0.64 to 1.00)). Furthermore, psychological intervention did result in small/moderate improvements in depression, standardised mean difference (SMD): -0.21 (95% CI -0.35, -0.08) and anxiety, SMD: -0.25 (95% CI -0.48 to -0.03). Results for mortality indicated some evidence of small-study bias, though results for other outcomes did not. Meta regression analyses revealed four significant predictors of intervention effects on depression were found: (1) an aim to treat type-A behaviours (ß = -0.32, p = 0.03) were more effective than other interventions. In contrast, interventions which (2) aimed to educate patients about cardiac risk factors (ß = 0.23, p = 0.03), (3) included client-led discussion and emotional support as core therapeutic components (ß = 0.31, p < 0.01), or (4) included family members in the treatment process (ß = 0.26, p < 0.01) were significantly less effective. AUTHORS' CONCLUSIONS Psychological treatments appear effective in treating psychological symptoms of CHD patients. Uncertainly remains regarding the subgroups of patients who would benefit most from treatment and the characteristics of successful interventions.
Facilitating effective mathematical teaching practices in Facilitating effective mathematical teaching practices in preschool preschool

Initial seeds for mathematics literacy are planted during early childhood. Children benefit when they are exposed to and provided with opportunities for math experiences that emphasize their holistic development and not just mathematics proficiency in isolation. This way of viewing and presenting mathematics to young children requires teachers who are equipped with strong mathematics teaching skills. This study examined a 21-hour professional development series for public school preschool teachers on early numeracy, geometry, mathematical reasoning, and teaching pedagogies. This professional development series aimed to help preschool teachers incorporate effective mathematical practices and increase their comfort level in teaching mathematics. Participants noted this professional development series impacted their ability to foster children’s early numeracy development, engage in math talk pose questions that helped children process early numeracy, and contextualize early numeracy through stories and/or word problems. The study demonstrates change takes time, and the impact of this professional development series is dependent on preschool teachers’ readiness and their perception of their teaching context needs.
DETERMINATION OF SYSTEMIC INFLAMMATORY BIOMARKERS IN MULTIPLE SCLEROSIS

Background: Multiple sclerosis (MS) is one of the most common demyelinating diseases of the central nervous sys-tem. We aimed to investigate serum and cerebrospinal fluid levels of different laboratory inflammatory biomarkers in patients with MS. Methods: A total of 120 subjects participated in the study, 60 of whom were diagnosed with MS, 30 with the final diagnosis of non-inflammatory diseases of the central nervous system (CNS)
Orthognathic Surgery Does a learning curve exist for accuracy in three-dimensional planning for maxillary positioning in bimaxillary orthognathic surgery?

The purpose of this study was to investigate the inﬂuence of time, and experience, on the accuracy of maxillary repositioning in bimaxillary orthognathic surgery performed using virtual surgical planning (VSP). Patients who had undergone bimaxillary orthognathic surgery were reviewed. Maxillary position on pre-and postoperative computed tomography scans was compared. The patients were divided into groups according to the year in which VSP was performed and surgery completed. Linear distances between upper jaw reference landmarks were measured in all three planes of space to determine accuracy between the preoperative VSP and the surgical outcome at various time points. One hundred subjects met the eligibility criteria for assessment and were allocated to groups: 2013 ( n = 10), 2014 ( n = 17), 2015 ( n = 39), 2016 ( n = 20)
An Investigation of Random Access Window Slot Adjustment Techniques in IEEE 802.11ah Protocol

—The Restricted Access Window (RAW) component of IEEE 802.11ah is deployed to drastically reduce channel contention in dense and heterogeneous sensor network environment. It divides sensor nodes or stations into groups and slots, allowing channel access only to one RAW slot at a time. Several algorithms and channel access optimization techniques have been proposed to optimize the RAW parameters, to ensure a contention free network or at least, minimally reduce it . These techniques often rely on previous traffic demands, collision rates and send/receive matrices to accurately predict the future of stations in an IoT environment by systematically adjusting its operations to reduce contention among the stations and the Access Point(AP), and ensuring a flexible transmission even in a dense network environment. This paper critically investigated and analyzed some of these RAW size adjustment schemes and also compared their performances through simulation results of the following metrics - throughput, data transmission, network delay, successful transmission probability and registration. Identifying their deficiencies and performance indices are the concerns so as to proffer better solutions and reduce any slot contention overhead in the network.
Using Discontinuous Eligibility Rules to Identify the Effects of the Federal Medicaid Expansions

This paper exploits the discrete nature of the eligibility criteria for two major federal expansions of Medicaid to discern the effects of the expansions on Medicaid coverage, overall health insurance coverage, and coverage by private and other non-Medicaid sources. Using data from the Survey of Income and Program Participation, we examine the "133 percent" program, which covered children under the age of six in families with incomes up to 133 percent of the poverty line, and the "100 percent" program, which covered children in poor families born after September 30, 1983. Graphical and conventional difference-in-differences methods suggest that the 100 percent program led to a 10-15 percentage point rise in Medicaid coverage among the targeted group, with a small decline in non-Medicaid coverage and a rise in the incidence of dual coverage. The newly covered group includes children in families further from the AFDC income cutoffs and closer to the poverty line than the traditional Medicaid caseload, and includes more children in dual-headed families. By comparison, we are unable to find much evidence that the 133 percent program had any effect on Medicaid coverage of children in families with incomes from 100 to 133 percent of the poverty line. This negative finding is confirmed in data from the March Current Population Survey.
Validity of the Mexican version of the combined Foot Care Confidence / Foot-Care Behavior scale for diabetes.

OBJECTIVE To 1) translate / transculturally adapt the original (English-language) combined Foot Care Confidence Scale / Foot-Care Behavior instrument (FCCS-FCB) to produce a Mexican-Spanish version and 2) determine its validity and reliability in a population with diabetes in Tijuana, Mexico. METHODS The original FCCS-FCB was translated (and back-translated), the content validated (by a group of health professional experts), and the instrument applied to 304 patients 23-78 years old in diabetes support groups in Tijuana, Mexico. Internal consistency for the study constructs ("self-efficacy," and risk / preventive foot self-care behaviors) was measured using Cronbach's alpha. The constructs were validated using principal component factor analysis. RESULTS The Cronbach's alpha values for internal consistency were 0.782 for self-efficacy and 0.505 for behaviors. Based on the analysis, two factors explained 49.1% of the total variance for self-efficacy, and six factors explained 57.7% of the total variance for behaviors. The results were consistent with those for the original (English) version of the FCCS-FCB. CONCLUSIONS The Mexican version of the FCCS-FCB is a reliable and valid instrument recommended for use with Mexican-Spanish-speaking patients with diabetes.
Kinematics and Dynamics of Multiphase Outflows in Simulations of the Star-Forming Galactic ISM

Galactic outflows produced by stellar feedback are known to be multiphase in nature. Both observations and simulations indicate that the material within several kpc of galactic disk midplanes consists of warm clouds embedded within a hot wind. A theoretical understanding of the outflow phenomenon, including both winds and fountain flows, requires study of the interactions among thermal phases. We develop a method to quantify these interactions via measurements of mass, momentum, and energy flux exchanges using temporally and spatially averaged quantities and conservation laws. We apply this method to a star-forming ISM MHD simulation based on the TIGRESS framework, for Solar neighborhood conditions. To evaluate the extent of interactions among the phases, we first examine the validity of the “ballistic model,” which predicts trajectories of the warm phase (5050 K < T < 2× 10 K) treated as non-interacting clouds. This model is successful at intermediate vertical velocities (50 km s−1 . |vz| . 100 km s−1), but at higher velocities we observe an excess in simulated warm outflow compared to the ballistic model. This discrepancy cannot be fully accounted for by cooling of high-velocity intermediate-temperature (2 × 10 K < T < 5 × 10 K) gas. By examining the fluxes of mass, momentum and energy, we conclude that warm phase gains mass via cooling of the intermediate phase, while momentum transfer occurs from the hot (T > 5× 10 K) to the warm phase. The large energy flux from the hot outflow that is transferred to the warm and intermediate phases is quickly radiated away. A simple interaction model implies an effective warm cloud size in the fountain flow of a few 100 pc, showing that warm-hot flux exchange mainly involves a few large clouds rather than many small ones.