Miracle-dz/UniFAR-FTUs huggingface dataset:
Compressive Sampled CSI Feedback Method Based on Deep Learning for FDD Massive MIMO Systems

Accurate downlink channel state information (CSI) is required to be fed back to the base station (BS) in frequency division duplexing (FDD) massive multiple-input multiple-output (MIMO) systems in order to achieve maximum antenna diversity and multiplexing. However, downlink CSI feedback overhead scales with the number of transceiver antennas, a major hurdle for practical deployment of FDD massive MIMO systems. To solve this problem, we propose a compressive sampled CSI feedback method based on deep learning (SampleDL). In SampleDL, the massive MIMO channel matrix is sampled uniformly in time/frequency dimension before being fed into neural networks (NNs), which will reduce the computational resource/time at user equipment (UE) as well as enhance the CSI recovery accuracy at the BS. Both theoretical analysis and normalized mean square errors (NMSE) results confirm the advantages of the proposed method in terms of time complexity and recovery accuracy. Besides, a suitable CSI feedback period is explored by link level simulations, which aims to further reduce the overhead of CSI feedback without degrading the communication quality.
Identity narrative, group and individual narratives and their role in social stability: A multidisciplinary approach

Major social political changes over the past decades have stimulated an interest in both individual (i.e., personal) and group narratives as they relate to the decision-making process. In previous contributions, we have proposed the term Identity Narrative (IdN) to define a cognitive and emotional framework that serves as an implicit (unconscious) scaffold of human autobiography. IdN is a form of implicit memory, the acquisition of which begins with the first human nonverbal interactions. It serves as a framework for a person’s identity and creates relative stability and constancy for conscious, explicit, autobiographical memory. In this contribution we are presenting a multi-system exploration of the relationship between personal narratives as influenced by IdN and group narratives and their impact on social stability. We are presenting multi-disciplinary data from a variety of fields, including group psychoanalysis, memory research, the neuroscience of error prediction and free energy, and social science. We propose that in order to maintain social stability, the ratio between the entropy of personal narratives and group narratives in society also remains relatively stable. Based on the literature on group analysis, we are proposing a further investigation of the interchange between group narratives (group psychology, history, the humanities, culture in a society) and individual narratives (autobiography and IdN), and their impact at a societal level. By doing so, we are reiterating that the study of group analysis is of special socio-political significance in these historical times.
Language negotiation moments of ethnic Tibetan students in People’s Republic of China: an identity perspective

Abstract Drawing from Darvin and Norton’s (2015) investment model, this study investigates ethnic Tibetan students’ multilingual practice and its influence on these students’ ethnic identity construction at an interior university in People’s Republic of China (PRC). Based on multiple data sources, findings from this study indicate that Tibetan students used specific multilingual semiotic resources from Tibetan, Mandarin, and English languages in constructing their ethnic identities in the interior university. On one hand, Tibetan language is both passive in developing their membership as legitimate Mandarin speakers and critical in their English language learning. On the other hand, they experienced different language negotiation moments in multilingual and monolingual spaces, which further impact on their investment in language learning. Discussions and implications center on these students’ different investment in multilingual practices in both academic and non-academic settings and their negotiations of (re)becoming ethnic Tibetans. Implications are provided regarding alternative pedagogies that aim at recognizing the situatedness of Tibetan students’ multilingual resources in constructing their ethnic identity.
The effects of corporate disclosure on firm value and firm performance: evidence from Turkey

Purpose The purpose of this study is to investigate the effects of firms’ disclosure practices on firm value and firm performance. Design/methodology/approach Firms’ disclosure scores were calculated based on unique hand-collected data by using the S&P transparency and disclosure index (S&P TD index). Ordinary least squares with year/firm fixed effects and two-stage least square methods were used to test the hypothesis. Findings It is observed that firms’ disclosure scores have positive and statistically significant effects on firm value. However, firms’ disclosure scores do not have significant effects on firm performance. This result is mostly observed in sub-categories of the index. Practical implications Results show that disclosed information has an impact on firm value. Therefore, standardization and increasing the reliability of this information are necessary for both information users and firms. It is important to standardize the information published by the firms and to increase their reliability by implementing new regulations by regulatory bodies in Turkey. Social implications Firms bear the costs due to their disclosure practices. However, the benefits derived from this situation may be higher than the cost incurred. Hence, it is suggested that firms that are traded in Turkey consider this in the determination of their disclosure policy. Originality/value This is the first study that investigates the effects of firms’ disclosure scores on both firm value and firm performance by using the S&P TD index in the Turkish context.
Salinity dynamics of the Baltic Sea

Abstract. In the Baltic Sea, salinity and its large variability, both horizontal and vertical, are key physical factors in determining the overall stratification conditions. In addition to that, salinity and its changes also have large effects on various ecosystem processes. Several factors determine the observed two-layer vertical structure of salinity. Due to the excess of river runoff to the sea, there is a continuous outflow of water masses in the surface layer with a compensating inflow to the Baltic in the lower layer. Also, the net precipitation plays a role in the water balance and consequently in the salinity dynamics. The salinity conditions in the sea are also coupled with the changes in the meteorological conditions. The ecosystem is adapted to the current salinity level: a change in the salinity balance would lead to ecological stress of flora and fauna, and related negative effects on possibilities to carry on sustainable development of the ecosystem. The Baltic Sea salinity regime has been studied for more than 100 years. In spite of that, there are still gaps in our knowledge of the changes of salinity in space and time. An important part of our understanding of salinity are its long-term changes. However, the available scenarios for the future development of salinity are still inaccurate. We still need more studies on various factors related to salinity dynamics. Among others more knowledge is needed, e.g. from meteorological patterns in various space and time scales and mesoscale variability in precipitation. Also, updated information on river runoff and inflows of saline water is needed to close the water budget. We still do not understand accurately enough the water mass exchange between North Sea and Baltic Sea and within its sub-basins. Scientific investigations of the complicated vertical mixing processes are additionally required. This paper is a continuation and update of the BACC II book which was published in 2015, including information from articles issued until 2012. After that, there have been many new publications on the salinity dynamics, not least because of the Major Baltic Inflow which took place in December 2014. Several key topics have been investigated, including the coupling of long-term variations of climate with the observed salinity changes. Here the focus is on observing and indicating the role of climate change for salinity dynamics. New results of MBI-dynamics and related water mass interchange between the Baltic Sea and the North Sea have been published. Those studies also included results from the MBI-related meteorological conditions, variability in salinity and exchange of water masses between various scales. All these processes are in turn coupled with changes in the Baltic Sea circulation dynamics.
Devulcanization of Scrap Ground Tire Rubber and Successive Carbon Nanotube Growth by Microwave Irradiation

Short-term microwave irradiation was effectively used to devulcanize scrap ground tire rubber (GTR) particles. Microwave devulcanization was a short-time procedure, i.e. 1 min, 2 min and 4 min, during which, the GTR particles were exposed to continuous ir- radiation in order to cleave the cross-linked mono/di/poly sulfidic bonds (S-S, C-S) among their molecules to obtain the natural rubber- like ingredient. After that, polypyrrole (PPy) coated devulcanized GTR particles (PPy/dGTR) were used as substrates to grow carbon nanotubes (CNTs) on their surfaces through another rapid microwave treatment. Here, PPy coating had served as the effective microwave absorbing layer and the organic metallocene precursor (ferrocene) was used as the nucleation agent to promote the CNT growth. Eventu- ally, the as-obtained products from each step were characterized in details via TGA, DSC, FT-IR, SEM, TEM, and their corresponding results were reported in order to verify and prove the success of the above mentioned methodology.
Web-Based Animation Video for Student Environmental Education at Elementary Schools

This research and development aim at knowing the effectiveness of web-based animation videos application on environmental education of elementary school students in East Jakarta in Indonesia. Web-based animation videos for environmental education produced consisted of climate change, mangrove forest, waste recycling, biodiversity, and ozone depletion animation video pages. Student environmental education measured was related to satisfying student natural curiosity, enhancing environmental awareness, and strengthening student pro-conservation values. In the conclusion, it is highlighted that there is a positive effect of web-based animation videos application on student environmental education at elementary school students in Jakarta in Indonesia
Momentum investing: evidence from the US tourism and hospitality

PurposeThe present research aims to examine a range of momentum trading strategies for the tourism and hospitality sector.Design/methodology/approachThe paper followed the methodology of Jegadeesh and Titman (1993) to construct the portfolios. In this methodology, all portfolios were formed and evaluated by their cumulative stock returns over the past J periods and holding the position for the next K periods. In total, nine formation and holding periods were used, represented by 3, 6 and 12. For example, strategy 3–3 (that is, strategy with J = 3 and K = 3) refers to the strategy that stocks are ranked based on their previous three months and then held for the next three months.FindingsThe findings demonstrated that none of these momentum investing strategies was profitable. Most of the results, however, show positive, but insignificant momentum returns. This finding can be interpreted as price reversal over a horizon of three to twelve months in the US hospitality and tourism sector. These results are robust to size, different formation and holding combinations, beta and turnover.Research limitations/implicationsRegarding the research limitations, this paper only considers the US tourism and hospitality sector. Therefore, the extension of results to other developed and developing markets should be taken carefully. Also, this paper relies only on the methodology of Jegadeesh and Titman (1993). Other methodologies could be suitable avenues for future research.Practical implicationsInvestors and portfolio managers who seek for earning abnormal returns by investing in the US HT stocks can attain their hopes by constructing portfolios based on existing guidelines in the literature and adopting a short-term reversal trading strategy or by buying past losers and selling past winners of the US tourism and hospitality stocks.Originality/valueThis research contributes to the hospitality finance literature by offering the investors who are interested in the US hospitality and tourism sector an uncomplicated trading rule that uses real return data and is expected to generate actual returns. Moreover, the momentum strategy of Jegadeesh and Titman (1993) is never used in the hospitality finance literature.
Targeting thymidine phosphorylase as a potential therapy for bone loss associated with periprosthetic osteolysis

Abstract Macrophages are generally thought to play a key role in the pathogenesis of aseptic loosening through initiating periprosthetic inflammation and pathological bone resorption. The aim of this study was to identify macrophage‐derived factors that promote osteoclast differentiation and periprosthetic bone destruction. To achieve this, we examined the effects of 12 macrophage‐derived factors that were identified by RNA‐seq analysis of stimulated macrophages on osteoclast differentiation. Surprisingly, thymidine phosphorylase (TYMP) was found to trigger significant number of osteoclasts that exhibited resorbing activities on dentine slices. Functionally, TYMP knockdown reduced the number of osteoclasts in macrophages that had been stimulated with polyethylene debris. TYMP were detected in serum and synovial tissues of patients that had been diagnosed with aseptic loosening. Moreover, the administration of TYMP onto calvariae of mice induced pathological bone resorption that was accompanied by an excessive infiltration of inflammatory cells and osteoclasts. The RNA‐seq for TYMP‐induced‐osteoclasts was then performed in an effort to understand action mode of TYMP. TYMP stimulation appeared to activate the tyrosine kinase FYN signaling associated with osteoclast formation. Oral administration of saracatinib, a FYN kinase inhibitor, significantly suppressed formation of bone osteolytic lesions in a polyethylene debris‐induced osteolysis model. Our findings highlight a novel molecular target for therapeutic intervention in periprosthetic osteolysis.
Brd4 Inactivation Increases Adenoviral Delivery of BMP2 for Paracrine Stimulation of Osteogenic Differentiation as a Gene Therapeutic Concept to Enhance Bone Healing

Bromodomain (BRD) proteins are histone code interpreters that recognize acetylated lysines and link the dynamic state of chromatin with the transcriptional machinery. Here, we demonstrate that ablation of the Brd4 gene in primary mouse bone marrow–derived mesenchymal stem cells via a conditional Brd4fl/fl allele suppresses osteogenic lineage commitment. Remarkably, loss of Brd4 function also enhances expression of genes in engineered adenoviral vectors, including Cre recombinase and green fluorescent protein (GFP). Similarly, vector‐based expression of BMP2 mRNA and protein levels are enhanced upon Brd4 depletion in cells transduced with an adenoviral vector that expresses BMP2 (Ad‐BMP2). Importantly, Brd4 depletion in MC3T3‐E1 and human adipose‐derived mesenchymal stem cells (AMSCs) transduced with Ad‐BMP2 enhances osteogenic differentiation of naïve MC3T3‐E1 cells via paracrine mechanisms based on transwell and conditioned medium studies. Our studies indicate that Brd4 depletion enhances adenoviral transgene expression in mammalian cells, which can be leveraged as a therapeutic strategy to improve viral vector‐based gene therapies. © 2021 The Authors. JBMR Plus published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research.
Behavioral and neurochemical changes induced by post-weaning female rats isolation

Rodents post-weaning isolation could be considered a significant early-life model of chronic stress. The aim of our study was to investigate the effects of female rats post-weaning isolation on different behavioral tests and neurochemical parameters. On postnatal day 21, female pups were housed either isolated or socially in groups (4/cage) for 6 weeks. After the 6 week adult female rats were behaviorally examined using open field test, three chamber social interaction test, hole board test and condition avoidance test. In addition, hippocampal content of neurotransmitters, oxidative stress and inflammatory markers were measured. Isolated female rats exhibited behavioral changes, female rats shows a significant increase in anxiety and a significant decrease in locomotor activity in comparison to the control group using open field test. Moreover, female rats isolation promoted a significant decrease in sociality index as compared to control groups. Finally, female rats post-weaning isolation of invoked a significant impairment in long-term and short-term memory evaluated by both conditioned avoidance and hole board tests, in comparison to the control group. Furthermore, female rats postweaning isolation induced oxidative stress, inflammation, and neurotransmitter alterations. Collectively female rats post weaning isolation had significantly prompted both behavioral and neurochemical changes which could represent the essential important symptoms of schizophrenia.
Improving Academic Performance Through Blended Learning: The Case of Afghan Higher Education

The last two decades have witnessed a global revolution in educational information that has led to the development and promotion of e-learning. Blended Learning (BL) is an increasingly growing e-learning model with a background in pedagogical and psychological theory that combines both online and traditional activities. In recent years, it has been an emerging trend and has impacted the growth, revenue, learner retention, and academic accreditation in higher education. With current improvements, extensive research, and successful implementation of blended and fully online learning, little research has been done to report the success of transitioning from face-to-face to blended learning or evaluations of e-learning data regarding learners from developing nations, particularly Afghanistan. This study aims to investigate and analyze the effectiveness of educational types (blended vs. traditional) regarding learners’ academic performance, in-class engagement, and satisfaction from the data in six BL courses and four traditional learning (TL) courses. To measure the success, this study used descriptive statistics. Additionally, Welch’s t-test was used to compare BL with TL courses and assess the differences between success and failure levels for both courses. Likewise, the Pearson correlation coefficient, along with an ordinary least square regression, was used to indicate the relationship between the final score and the BL and TL activities, respectively. The study outcome will be used for reporting and feedback for educational parties to value the quality of teaching and learning, enhance learners’ performances, and for the institutionalization of BL in the country.
A NUMERICAL STUDY OF A HOMOGENEOUS BEAM WITH A TIP MASS

In this paper, we prove the existence and uniqueness of the weak solution of a flexible beam that is clamped at one end and free at the other; a mass is also attached to the free end of the beam. Also, we construct a finite element method, based on piecewise cubic Hermitian shape functions. Next, we derive error estimates for the semi-discrete Galerkin approximations. The results are derived from [2]. Finally, we implement the results of numerical schemes developed.
Open trial of an adaptation of cognitive processing therapy for message-based delivery.

Cognitive Processing Therapy (CPT) has been found to be effective in individual and in group therapy formats for Posttraumatic Stress Disorder (PTSD). However, many people in need of evidence-based PTSD treatment do not receive therapy due to distance from or availability of CPT-trained therapists, work and family obligations, and other barriers to in-person treatment. One way to expand the reach of CPT is through an asynchronous messaging format. To assess feasibility and preliminary effectiveness, CPT-Text was developed and pilot tested in an open trial (N = 28) and then compared to a matched comparison sample of people receiving messaging therapy as usual (TAU; n = 23) for PTSD through the same platform. The CPT-Text completion rate (63%) was comparable to face-to-face and telehealth-delivered CPT in previous studies. Word count and use of video meetings were comparable or lower than TAU, suggesting feasibility of delivery of a structured, trauma-focused intervention in a texting format. CPT-Text resulted in improvement in both PTSD and depression in fewer days than required for clinically significant change in the TAU sample. This effect for PTSD was greater than for TAU and the pre-post and between-conditions effect size for change was large. This first examination of a structured, trauma-focused intervention delivered through a messaging therapy platform suggests that with further testing and refinement, asynchronous CPT delivered via text may be a feasible, efficient, and effective PTSD intervention.
Causal Relationship between Fiscal Policy and Private Investment in Nigeria for the period 1986 -2019

This study investigated the causal relationship between fiscal policy and private investment in Nigeria (1986-2019) using secondary data from Statistical bulletin of Central Bank of Nigeria. The research work used the Granger Causality techniques to test the causal relationship between the independent variables (Tax revenue, Oil revenue, Total expenditure and Public debt) on the dependent variable (Private Investment) while VAR was used to test the short run relationship. The study found that fiscal policy instruments granger causes private investment in Nigeria within the period of the study. The study therefore advocates that Government should as necessity fully liberalized or privatized NNPC and the Power sector as these critical sectors will help the growth of the private sectors and reduce unemployment in the country. Nigerian Government ought to increase its spending on infrastructure, especially capital projects in the economy in order to bridge Original Research Article Chukwu et al.; ARJASS, 14(2): 33-46, 2021; Article no.ARJASS. 68785 34 infrastructure gap in the country. Provision of tax incentives to private sectors by the Government should be encouraged, as this will help the growth of private investment in the country. Also, restructuring of the economy by manufacturing what we need should be encouraged by government because exporting commodity (raw material) means exporting jobs.
The influence of internal audit and internal control toward fraud prevention

Purpose: This study aimed to determine whether there is an influence of internal audit and internal control on fraud prevention at PT Pos Indonesia (Persero) Bandung. Research methodology: This study used the verification method, the sampling technique used in this study was a combination of non-probability with a saturated sampling technique. The sample in this study were employees at PT Pos Indonesia (Persero) Bandung City, amounting to 91 people. The Program used in analyzing data was Statistical Package for Social Sciences (SPSS) Ver25.00. Results: The results showed that internal audit and internal control influence the prevention of fraud in PT Pos Indonesia (Persero) Bandung. In addition, the magnitude of the influence of internal audit and control in contributing to the prevention of fraud by 68.8%. Limitations: The study was only conducted at PT Pos Indonesia (Persero), Bandung City. Contribution: This research is expected to be able to provide input for PT Pos Indonesia (Persero) Bandung City which is aimed at improving improvements in minimizing and preventing fraud, and can be used as additional information for related parties.