Miracle-dz/UniFAR-FTUs huggingface dataset:
On Optimality of Linear Interference Alignment for the Three-User MIMO Interference Channel with Constant Channel Coefficients

Author(s): Wang, Chenwei; Gou, Tiangao; Jafar, Syed Ali | Abstract: We investigate the optimality of linear interferencealignment (allowing symbol extensions) for Â 3-user$M_T\times M_R$ MIMO interference channel where $M_T$ and $M_R$denote the number of antennas at each transmitter and each receiver,respectively, and the \emph{channel coefficients are held constant}. Recently, Wang et al. have conjectured that interference alignment based on linear beamforming using only proper Gaussian codebooks and possibly with symbol extensions, is sufficient to achieve the information theoretic DoF outer bound for all $M_T, M_R$ values exceptif $|M_T-M_R|=1$, $\min(M_T,M_R)\geq 2$. A partial proof of the conjecture is provided by Wang et al. for arbitrary $M_T, M_R$ values subject to a final numerical evaluation step that needs to be performed for each $M_T, M_R$ setting to complete the proof. The numerical evaluation step is also carried out explicitly by Wang et al. to settle the conjecture for all Â $M_T, M_R$ values up to 10. For $|M_T-M_R|=1$, $\min(M_T,M_R)\geq 2$, Wang et al. show that interference alignment schemes based on linear beamforming with proper Gaussian signaling and symbol extensions are not sufficient to achieve the information-theoretic DoF outer bonds. In contrast, in this note we show, for all $M_T, M_R$ values up to 10, that interference alignment schemes based on linear beamforming over symbol extensions are enough to achieve the information theoretic DoF outer bounds for constant channels, if \emph{asymmetric complex signaling} is utilized. Based on this new insight, we conjecture that linear interference alignment is optimal for achieving the information theoretic DoF outer bounds for all $M_T, M_R$ values in the 3 user $M_T\times M_R$ MIMO interference channel with constant channel coefficients, except for the case $M_T=M_R=1$ where it is known that either time/frequency-varying channels or non-linear (e.g., rational alignment) schemes are required.
PreserFlo™ MicroShunt Versus Trabeculectomy in Patients With Moderate to Advanced Open-Angle Glaucoma: 12-Month Follow-Up of a Single-Center Prospective Study

Purpose: The study compares the efficacy and safety of PreserFlo™ MicroShunt (Santen, Osaka, Japan) and trabeculectomy in eyes with moderate to advanced open-angle glaucoma. Methods: In this prospective study, 300 patients (300 eyes) with moderate to advanced open-angle glaucoma were treated with either PreserFlo MicroShunt or trabeculectomy. The implantation of the PreserFlo MicroShunt was performed in 150 eyes (group A) and trabeculectomy was performed in 150 eyes (group B). The efficacy was evaluated by estimating the absolute and qualified success rates using the Kaplan-Meier survival analysis. Results: During the 12-month follow-up period, 81.33% of eyes in group A and 94% in group B reduced intraocular pressure (IOP) >20% without glaucoma eye drops. The average IOP 12 months after surgery was 12.89±3.4 mmHg in group A and 11.39±4.5 mmHg in group B, which was significantly lower than the baseline intraocular pressure (group A: 23.47±8.36 mmHg, p=0.00053; group B: 22.03±5.2 mmHg, p= 0.0006). The number of topical medications administered 12 months after ocular surgery was 0.4±0.8 in group A and 0 in group B, compared to 2.5±1.2 in group A and 2.7±0.9 in group B at baseline (group A: p= 0.00091; group B: p= 0.00072). Ten eyes (6.67%) in group A and four eyes (2.67%) in group B were referred for bleb revision due to bleb fibrosis and consequent acute postoperative rise in IOP. Four eyes of group A and two eyes of group B were treated with transscleral cyclophotocoagulation. Five eyes in group B received re-trabeculectomy because of dysfunction of the primary bleb. Conclusion: PreserFlo MicroShunt reduced the number of antiglaucoma agents compared to baseline, but was inferior to trabeculectomy at reducing IOP after 12 months. Additionally, trabeculectomy produced better absolute success rates after 12 months than PreserFlo MicroShunt in the treatment of moderate to advanced open-angle glaucoma.
Wound healing activity of Dillenia ochreata leaves ethanol extract in Wistar rats

Context: Dillenia ochreata is a medicinal plant used traditionally for scabies treatment. D. ochreata leaves contain secondary metabolites of triterpenoids, phenolics, and steroids that have the potential to accelerate the wound healing process. Aims: To determine the effect of the ethanolic extract of D. ochreata leaves on the speed of healing of burns and incisions. Methods: The test animals were divided into six groups: a positive control group (1% silver sulfadiazine ointment for burns and 10% povidone-iodine ointment for wound incision), a negative control group, and four treatment groups with an ointment concentration of 2.5, 5, 7.5, and 10%. Burns were made using a heated iron plate, and incision wounds were made using a sterile scalpel blade with a length of 3 cm. Parameters observed included burn area, incision length, percent recovery, and histopathology. Results: It was observed that the 10% concentration of D. ochreata leaf ethanol extract showed the best results in healing burns and incision wounds, with 100% healing within 12 days for burns and five days for incisions. The treatment group had a significantly different wound healing activity (p<0.05) compared with the negative control and was not significantly different (p>0.05) from the positive control. Conclusions: D. ochreata leaf ethanol extract (10%) could accelerate the healing of burns and incisions.
Dual-Band Shared-Aperture Multiple Antenna System With Beam Steering for 5G Applications

This brief presents a high-efficiency shared-aperture multiple antenna system. Unlike general shared-aperture antennas, the proposed antenna system with the size of $0.384 {\times } 0.384 {\times } 0.171 {\mathrm {\lambda }} ^{3}$ makes high reuse the aperture in the two respective frequency bands, and the antenna structures of the two bands can each generate positive mutual enhancement for their radiating characteristics in the two bands. The flat Luneburg lens can realize beam steering capability for mm-wave antenna from 25.5 to 29.5 GHz with the gain of 19.3 dBi and improve the wide-angle scanning matching impedance for the Sub-6 GHz antenna from 3.2 to 3.45 GHz with the gain of 6.2 dBi. Meanwhile, as the radiating patch of the Sub-6 GHz antenna, the meta-surface can reduce the focal distance of the lens and maintain the high gain of the mm-wave antenna. Hence, a compact antenna system can achieve beam steering capabilities (up to 112°) in the Sub-6 GHz band and (up to 56°) mm-wave band with high gain, respectively. And the port isolation of the proposed antenna system between two frequency bands is generally better than 25 dB and even up to 40 dB at the Sub-6 GHz band. As reported in the simulated and measured results in a linear array, the antenna system shows good radiating performance with a dual-polarization state. Hence, the proposed multiple antenna system is a good candidate for 5G applications because of the high-efficiency, beam steering with high gain and full 5G band.
Karyotypic Analysis of Synchronous Breast Cancer and Thyroid Diseases: A Pilot Study at a Tertiary Care Centre

Introduction: The coincidence of thyroid disease and breast cancer is in controversy since long time. Current scientific evidence supports a strong association between the hormone oestrogen and breast cancer and also with thyroid diseases. Aim: To study the karyotypic association between breast cancer and thyroid diseases. Materials and Methods: This cross-sectional pilot study was conducted from October 2018 to August 2020 in Department of Surgery, Hamidia hospital, Bhopal, Madhya Pradesh India. A total of 50 patients were included in the study with a division into two respective arms of patients with Carcinoma breast (Ca breast) and thyroid diseases. Each arm included 25 patients. All patients were subjected to detailed history and complete physical examination. Karyotyping of all patients was carried out by using fasting blood samples and standard staining techniques were applied to detect any chromosomal aberration. Statistical analysis done on the collected data, by chi-square test and t-test by Statistical Analysis of the Social Sciences (SPSS) v23 (IBM Corp.). Results: In a total of 50 patients with breast cancer (25) and thyroid disorders (25),most of these patients 24 (48%) were in the age group of 40-49 years. Amongst the 25 patients with breast cancer, thyroid diseases were present in 10 (40%), while no case of carcinoma breast was seen in patients with thyroid disorders. In seven patients, we observed karyotype abnormality was observed in the form of co-existing deletions and micro deletions, and all of them had synchronous carcinoma breast and thyroid diseases, which is significant (p-value=0.0085), showing some definite association at the genetic level. Conclusion: To summarise, the present study study clearly shows that patients with breast cancer tend to have co-existing thyroid diseases, which can either be benign or malignant thus these individuals should be appropriately investigated to exclude the possibility of an underlying undiagnosed thyroid disease, which would also help in early diagnosis and treatment.
A new self-adaptive inertial algorithm with $ W $-mapping for solving split feasibility problem in Banach spaces

In this paper, the split feasibility problem is studied in real Banach spaces. Through the $ W $-mapping, a new iterative algorithm with the inertial technique for solving the split feasibility problem is proposed, which the step size is self-adaptive and no prior estimation of operator norm is required. We prove that the proposed algorithm converges weakly to a solution of the split feasibility problem under some mild conditions. Finally, the effectiveness of the proposed algorithm is indicated by numerical experiments. Our results are innovative and can enrich recently announced related results in the literature.
Performance Enhancement of Grid Integrated Photovoltaic System Using Luo Converter

The main aim of this article is to implement a novel active power decoupling-based Luo converter for the weak grid system interfacing photovoltaic (PV) system. The modified Perturb and Observe (P&O) algorithm has been used for maximum power extraction from the PV source. The proposed system is capable of operating in the standalone mode and the grid-connected mode. The Luo converter is promising with the viewpoint of low inrush current, high voltage gain, small ripples along with high power density, high efficiency, and simple structure. Hence, the Luo converter has been used for maximum power extraction from the PV source, which is appropriate for both grid-tied and islanding modes of operation. The modified P&O algorithm has been used for maximum power extraction. The proposed MPPT technique reduces the drift problem, which occurs in the conventional MPPT methods by including the data of change in current ( $\Delta I$ ) in addition to the data used in the conventional P&O algorithm. This extraction has achieved by using a novel decoupling method, which, in turn, reduces the size of the filter. The converter along with the decoupling method also ensures reduced harmonics at the grid output. The operational principle and the stability analysis of the proposed converter have been analyzed in different modes of operation, such as grid-connected mode and standalone. The simulation has been carried out in MATLAB/Simulink environment. The implementation of the converter is carried out using a microcontroller-based prototype model to validate the performance. The efficiency of the proposed converter has been calculated to be 87.53% when operating under the grid-connected mode, whereas the efficiency is 92.46% when operating under the standalone mode.
Hyperhomocysteinemia Promotes Cardiac Hypertrophy in Hypertension

Hyperhomocysteinemia (HHcy) is positively linked with several cardiovascular diseases; however, its role and underlying mechanisms in pathological cardiac hypertrophy are still unclear. Here, we focused on the effects and underlying mechanisms of HHcy in hypertensive cardiac hypertrophy, one of the most common and typical types of pathological cardiac hypertrophy. By a retrospective analysis of the association between HHcy and cardiac hypertrophy in a hypertensive cohort, we found that the prevalence of HHcy was higher in patients with hypertrophy and significantly associated with the presence of cardiac hypertrophy after adjusting for other conventional risk factors. In mice, HHcy induced by a methionine (2% wt/wt) diet feeding significantly promoted cardiac hypertrophy as well as cardiac inflammation and fibrosis induced by 3-week angiotensin ІІ (AngІІ) infusion (1000 ng/kg/min), while folic acid (0.006% wt/wt) supplement corrected HHcy and attenuated AngII-stimulated cardiac phenotypes. Mechanistic studies further showed that homocysteine (Hcy) exacerbated AngII-stimulated expression of Calcineurin and nuclear factor of activated T cells (NFAT), which could be attenuated by folic acid both in mice and in neonatal rat cardiomyocytes. Moreover, treatment with cyclosporin A, an inhibitor of Calcineurin, blocked Hcy-stimulated Calcineurin-NFAT signaling and hypertrophy in neonatal rat cardiomyocytes. In conclusion, our study indicates that HHcy promotes cardiac hypertrophy in hypertension, and Calcineurin-NFAT pathway might be involved in the pro-hypertrophic effect of Hcy.
Job Satisfaction Factors among College Teachers : An Empirical Investigation

Human resources are one of the most vital resources of a country, as it exploits the natural environments for the entire population. The importance and significance of various aspects of development scientific and technological, economic, and social, to name a few can be evaluated on a criterion of their utility and service for the welfare of human being. All the aspects of development in the ultimate analysis are or should be aids to human development. The development is not just about factories dams and roads. Development is basically about people. The goal is people’s material, cultural and spiritual fulfilment. Job satisfaction is solitary of the largely extensively discussed issue in organizational performance and human resource management. In the present study, an effort has been made to identify the major factors affecting the job satisfaction among the collegeteachers. The researchers identified 25 job satisfaction items through extensive literature review. The perceptions of the respondents were collected through structured questionnaire based on 5-point Likert scale. Exploratory factor analysis was done to explore the factors. The Cronbach’s alpha (0.870) confirms the internal consistency of the instrument. The KMO Measure of Sampling Adequacy is 0.798, indicating the present data is suitable for factor analysis. Similarly, Bartlett’s Test of Sphericity is significant (p<0.001) indicating significant correlation exists between the variables to proceed with the factor analysis. Thestudy explored 7 factors having eigen value of more than 1 and explaining 77.078% of the total variance. Further, independent sample t-test is applied to find whether there exists any difference in overall satisfaction with respect to various demographic variables of the respondents. It was found that significant difference exists only with Sector and Education of the respondents. Moreover, age, gender and income bear no impact on job satisfaction.
Dynamic changes in the levels of sCD62L and SPARC in chronic myeloid leukaemia patients during imatinib treatment

Chronic myeloid leukaemia (CML) microenvironment is responsible for resistance of leukaemic cells to tyrosine kinase inhibitor, altered adhesion, increased proliferation and leukaemic cells growth and survival through the secretion of many soluble molecules. We aimed at monitoring soluble L‐selectin (sCD62L) and secreted protein acidic and rich in cysteine (SPARC) levels in chronic phase chronic myeloid leukaemia (CP‐CML) patients and assessing the impact of imatinib on these parameters.
Green Synthesis of Gold Nanoparticles Using Zingiber Officinale Rhizomes Aqueous Extract and its Gastroprotective Activity Against Ethanol-Produced Stomach Ulcer in Rodents

Synthesis of gold nanoparticles exhibition wide range of bioactivities and was conventionally used for the remedy of numerous disorders. Our study aims to measure the gastroprotective effect of synthesized gold nanoparticles on absolute ethanol-induced stomach ulceration in rats. The rats were noticeably administered with two doses of gold nanoparticles (175 ppm and 350 ppm) with absolute alcohol and showed a significant improvement in the adverse effect of ethanol-produced stomach damage as confirmed by decreasing ulcer index and raising % of ulcer prevention. Increased mucus pH of stomach content reduced ulcerated portion, condensed or nonappearance of edema, and white blood cells permeation subcutaneous layer. In gastric tissue homogenate, synthesized gold nanoparticles presented a substantial increase in superoxide dismutase (SOD), catalase (CAT) actions, and a substantial lessening of malondialdehyde (MDA) amount. Besides, gold nanoparticle increases the intensity of periodic acid Schiff stained (PAS) of the gastric epithelium of the stomach. Gold nanoparticles confirmed gastro-protective effects which might be qualified to its antioxidant, increase mucus secretion, increase endogenous enzymes (SOD and CAT), and reduce MDA quantity.
“Selective Friendship at the Fund”: United States Allies, Labor Conditions, and the International Monetary Fund’s Legitimacy

This article discusses the International Monetary Fund’s recent effort to garner legitimacy by incorporating the reduction of economic inequality in its lending programs. It argues that the impact of the US as a major shareholder on conditionality and geopolitical considerations beyond objective and measurable economic necessities detract from these efforts to expand legitimacy. Using a panel data analysis of International Monetary Fund programs between 1980 and 2013, the article shows that US-allied left-wing governments receive a larger number of labor conditions in their programs compared to non-allied and right-wing governments. The article argues that this is part of left-wing governments’ strategy of maintaining their alliance with the US and demonstrating ideological proximity. In exchange, the US uses its influence to secure fewer conditions in total for its allied governments. This not only shifts the burden of adjustment on labor groups but also harms the Fund’s procedural legitimacy, as conditions are not objectively determined. It also has adverse implications for outcome legitimacy by distorting economic policies and outcomes and increasing income inequality.
Toxic megacolon after irrational antibiotic treatment of pregnat patient with Covid 19: Case report

Introduction: Optimal management of toxic megacolon as a consequence of Cl. difficile colitis is still matter of controversy, as well as timing of available therapeutic modalities. In this article we report a case of severe C. difficile colitis associated with toxic megacolon in a pregnant patient with Covid 19, who was successfully treated conservatively. Case Report: A 33-years old pregnant woman contracted SARS-CoV-2 in the 32nd week of pregnancy. She was admitted to regional hospital and treated extensively by wide-spectrum antibiotics. After the delivery she developed severe form of Cl. difficile colitis with toxic megacolon. In spite of severe clinical picture, the patient was treated conservatively, with high initial oral doses of vancomycin, with subsequent tapering. The outcome of the treatment was complete recovery and colonic functions were regained completely. Conclusion: In conclusion, our case shows that in younger patients, who were fit before occurrence of Cl. difficile colitis and toxic megacolon, conservative therapy should be tried as long as possible before turning to colectomy, since chances for cure without surgery are considerable.
The differences between VDN and COMA algorithms in PyMARL and implications for their win rate in different SMAC scenarios

In the current SMAC paper, almost no one has analyzed the reason of the difference of success rate% between PyMARL algorithms used in SMAC. The purpose of this article is to study the code differences and the idea differences between VDN algorithm and COMA algorithm in PyMARL framework used in SMAC environment, and the influence of these two algorithms on the result of SMAC experiment. The conclusion of this paper is that VDN algorithm is superior to COMA algorithm in SMAC. Because in almost all scenarios of SMAC, the algorithm based on value function (VDN) can solve simple cases very quickly and effectively, while the algorithm based on strategy gradient (COMA) converges to local minimum easily, and it is extremely difficult for COMA to come up with a perfect strategy.
Appraising Users’ Satisfaction in Public Housing: A Case study of Crospil Housing Estate, Akpabuyo, Cross River State, Nigeria

The paper appraised users’ satisfaction with housing units by occupants of the CROSPIL housing estate, Akpabuyo, Cross River State, Nigeria with the aim of improving the housing sector in the State by examining the level of satisfaction with the architectural design of the housing units and neighbourhood facilities in the estate. Methodology of the study was through questionnaire administration, physical observation, measurement of spaces, interviews and review of the literature. The study revealed that apart from road infrastructure, the estate lack neighbourhood facilities such as water, shopping centres, health centres, schools and recreation centres (green areas). Residents were generally satisfied with the design of living rooms, bedrooms and kitchens in all housing unit types but dissatisfied with other spaces like toilet/bath, store and dining which were non-existing in some of the housing units. The study concluded that irrespective of the income level of users, the basic functional spaces required in any housing unit should be provided for all. Also, neighbourhood facilities that make living comfortable should be provided as a matter of urgency.
Finite Domain Constraint Programming in Oz. A Tutorial

This document introduces constraint programming in Oz. We r estrict our attention to combinatorial problems that can be stated with variables rangi ng over finite sets of nonnegative integers. Problems in this class range from puzzles to real w orld applications as diverse as scheduling, ware house allocation, configuration and place ment.