Miracle-dz/UniFAR-FTUs huggingface dataset:
Performance Analysis of Mutual Funds Based on Market Timing Ability and Stock Selection Skill during COVID-19 Pandemic in Indonesia

This research aims to analyze the effect of market timing ability and stock selection skills on the performance of stock mutual funds during the Covid-19 pandemic in Indonesia. Trenor Mazuy Unconditional Model and Trenor Mazuy Conditional Model are used to calculate market timing ability and stock selection skill, considering the account macroeconomic variables named inflation and the rupiah exchange rate. The type of this research is a quantitative descriptive study with a sample of 55 stock mutual funds with assets above IDR 500 billion. The data analysis technique used is multiple linear regressions using STATA 16 analysis tool. The result shows that market timing ability and stock selection skill unconditional model have a significant effect on the performance of stock mutual funds. The calculation of the unconditional model produces a positive value. Investment managers of equity mutual funds in Indonesia do not yet have good market timing skills, while the ability to choose stocks is better. The conditional model shows insignificant results on the performance of equity mutual funds. The market timing conditional model produces a positive number, while the ability to choose the stock produces a negative number. This shows that when considering the economic conditions of a country, the performance ability of investment managers in market timing will increase, while the ability of stock selection will reduce the performance of a stock mutual fund. The level of volatility during the pandemic creates uncertainty so that macroeconomic variables as control variables need to be considered in making investment decisions. Keyword: Mutual fund performance, market timing ability, stock selection skill, Trenor Mazuy Unconditional Model, Trenor Mazuy Conditional Model. Copyright © 2021 The Author(s): This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International License (CC BY-NC 4.0) which permits unrestricted use, distribution, and reproduction in any medium for non-commercial use provided the original author and source are credited.
Rotational Waves in the Plume of an Externally-Mounted Hall Thruster Cathode

T HE hollow cathode is the electron source most commonly employed for Hall effect thrusters (HETs). The electrons emitted by these devices serve the dual roles of impact ionizing the HET propellant and neutralizing it once it has been accelerated (Fig. 1). The electrical coupling from the cathode to the HET discharge is thus a critical driver for their efficient operation. In light of this fact, there have been a number of efforts to characterize the local processes governing the cathode-to-main discharge environment. These studies have revealed that this region is nonclassical and characterized by a wide range of instabilities that can influence the electrical coupling [1–7]. In particular, for thrusters with centrally mounted cathodes (i.e., concentric with the main discharge), there is a large-amplitude “antidrift” azimuthal mode in the cathode plume [1] that may dominate the local electrical coupling [8]. With that said, all HETs that have been flown to date employ externally mounted cathodes, i.e., configurations where the electron source is mounted outside the main discharge (Fig. 1). It has yet to be seen if the antidrift instability persists for this more common thruster type. This is a pressing question given the potentially dominant impact the wave may have on the near-field dynamics. With this in mind, this Note presents the first experimental attempt to identify if the same type of rotational wave that has been observed for HETs with centrally mounted cathodes persists for a thruster with an external cathode. We describe in the following the experimental procedure used to search for these waves (Sec. II), the results of this analysis with discussion of the findings (Secs. III and IV), and the major conclusions (Sec. V).
SELECTION OF EFFECTIVE SOFTWARE FOR THE ANALYSIS OF THE FRACTIONAL COMPOSITION OF THE CHAOTIC SEED LAYER USING THE EXAMPLE OF OILSEED RADISH

This article generalises the peculiarities and efficiency of the use of three software packages, Digimizer image analysis software (v. 4.2), ImageJ2 version 2.0. 0-rc-64 and WipFrag 3.3. 14.0. These packages were used in studying the fractional composition of oilseed radish seeds for scanning in the mode of single-layer inseparable placement. The generalisation of the main caveats and features of the effective use of each of the software packages is made on the basis of detailed analysis of the features of each of package in the use to the features of the scan and the obtained scanned image The above-mentioned aspects are illustrated in detail and reservations about the options for the effective use of each package are represented. The efficiency and expediency of using the program, ImageJ2 version 2.0. 0-rc-64, with a level of identity to the standard method of determination of 75.9% and the program, WipFrag 3.3. 14.0, with a similar efficiency index at 89.3% for laboratory determination of seed fractional composition were also established.
Assessing domestic factors determining water consumption in a semi-arid area (Sedrata City) using artificial neural networks and principal component analysis

The growing demand for fresh water and its scarcity are the major problems encountered in semi-arid cities. Two different techniques have been used to assess the main determinants of domestic water in the Sedrata City, North-East Algeria: principal component analysis (PCA) and artificial neural networks (ANNs). To create the ANNs models based on the PCA, twelve explanatory variables are initially investigated, of which nine are socio-economic parameters and three physical characteristics of building units. Two optimum ANNs models have been selected where correlation coefficients equal to 0.99 in training, testing and validation phases. In addition, results demonstrate that the combination of socio-economic parameters with physical characteristics of building units enhances the assessment of household water consumption.
Machine Learning for Databases

Machine learning techniques have been proposed to optimize the databases. For example, traditional empirical database optimization techniques (e.g., cost estimation, join order selection, knob tuning) cannot meet the high-performance requirement for large-scale database instances, various applications and diversified users, especially on the cloud. Fortunately, machine learning based techniques can alleviate this problem by judiciously learning the optimization strategy from historical data or explorations. In this tutorial, we categorize database tasks into three typical problems that can be optimized by different machine learning models, including (i) NP-hard problems (e.g., knob space exploration, index/view selection, partition-key recommendation for offline optimization; query rewrite, join order selection for online optimization), (ii) regression problems (e.g., cost/cardinality estimation, index/view benefit estimation, query latency prediction), and (iii) prediction problems (e.g., transaction scheduling, trend prediction). We review existing machine learning based techniques to address these problems and provide research challenges.
Effect of Bisphenol-A on the Bioconversion of Tea Waste into Vermicompost by Eudrilus Eugeniae (Kinberg, 1867) at Different Intervals

Abstract: Vermicompost has been appropriate alternative for the best hygienic and cost effective disposal of wastes. Since the vermitechnology is considered as one of the best methods, the largely available tea waste was taken to the present work to study the efficiency the Eudrilus eugeniae in the management of such waste by converting it into vermicompost. The efficiency of the conversion of Tea waste into compost in the form minerals N, P, K and Fe, Mn, Zn, Cu by Eudrilus eugeniae has been analyzed on 15 th and 30 th days. Physical characteristic were also analyzed simultaneously to understand the efficiency of earthworm in maintaining the physical status of the soil. Macro and micro nutrients were increased significantly on 15 th and 30 th days. FTIR spectrum was recorded for the control and experimental compost. The variation of spectrum was noted. The Spectrum of experimental consisted of nitrogen rich peak. The control system has no N-H stretching peak whereas tea waste spectra has N-H stretching peak. The peak at Bisphenol-A leads to large number of hydrogen group i.e., the mixture has more moisture than the control system. The tea waste has flavonoids which also exhibit the OH group at the same system. To understand the anatomy, histology of the different parts of the earthworm was studied. Histology of the tested anterior region of Earthworm reveals that the cuticle is not much damaged. The dorsal and ventral blood vessel ruined largely. The control animal of clitellar region showed intact structure of internal organs. The coelom and Blood vessels are well marked. In the experimental animal, the clitellar region showed slight modification of the anatomy. The pigment cells are prominent in the waste treatment with Bisphenol-A. In some places, the circular muscles are disorganized. In middle region, the cuticle and the epidermis are intact. The study reveals the impact of the Bisphenol on the conversion of tea waste into compost.
Acta Gymnica, vol. 44, no. 2, 2014

Background: The application of the philosophical mode of investigation called “phenomenology” in the context of sport. Objective: The goal is to show how and why the phenomenological method is very often misused in the sportrelated research. Methods: Interpretation of the key texts, explanation of their meaning. Results: The confrontation of concrete sport-related texts with the original meaning of the key phenomenological notions shows mainly three types of misuse – the confusion of phenomenology with immediacy, with an epistemologically subjectivist stance (phenomenalism), and with empirical research oriented towards objects in the world. Conclusions: Many of the discussed authors try to take over the epistemological validity of phenomenology for their research, which itself is not phenomenological, and it seems that this is because they lack such a methodological foundation. The authors believe that an authentically phenomenological analysis of sport is possible, but it must respect the fundamental distinctions that differentiate phenomenology from other styles of thinking.
Development and Validation of a Checklist for Urban Health Service Centers in Terms of Health, Safety and Environmental Management

Background: Comprehensive urban health service centers have an important role in disease prevention. However, there is no sufficient information about how these centers protect their assets and manage health, safety and environment (HSE) in their workplaces. On the other hand, there is no suitable tool to assess the HSE status in these centers. This study aimed to design and evaluate the face and content validity of the HSE checklist of urban health service centers. Methods: All available related literature were reviewed to extract the initial items. A panel of experts was used to assess the content and face validity of the checklist through quantitative and qualitative methods. Results: The final checklist consists of 11 components and 86 items. The CVR and the impact score of the remaining items ranged from 0.8 to 1 and 1.9 to 5, respectively. The CVI of the instrument was 0.86. Conclusion: The designed checklist in this study is a suitable valid tool (face and content validity) based on the opinions of the expert panel and the target group. Therefore, it can be used to examine the HSE management situations in urban health service centers.
Sofosbuvir for Hepatitis C Genotype 2 or 3 in Patients without Treatment Options

Background: Patients chronically infected with hepatitis C virus (HCV) genotype 2 or 3 for whom treatment with peginterferon is not an option, or who have not had a response to prior interferon treatment, currently have no approved treatment options. In phase 2 trials, regimens including the oral nucleotide polymerase inhibitor sofosbuvir have shown efficacy in patients with HCV genotype 2 or 3 infection. Methods: We conducted two randomized, phase 3 studies involving patients with chronic HCV genotype 2 or 3 infection. In one trial, patients for whom treatment with peginterferon was not an option received oral sofosbuvir and ribavirin (207 patients) or matching placebo (71) for 12 weeks. In a second trial, patients who had not had a response to prior interferon therapy received sofosbuvir and ribavirin for 12 weeks (103 patients) or 16 weeks (98). The primary end point was a sustained virologic response at 12 weeks after therapy. Results: Among patients for whom treatment with peginterferon was not an option, the rate of a sustained virologic response was 78% (95% confidence interval [CI], 72 to 83) with sofosbuvir and ribavirin, as compared with 0% with placebo (P<0.001). Among previously treated patients, the rate of response was 50% with 12 weeks of treatment, as compared with 73% with 16 weeks of treatment (difference, -23 percentage points; 95% CI, -35 to -11; P<0.001). In both studies, response rates were lower among patients with genotype 3 infection than among those with genotype 2 infection and, among patients with genotype 3 infection, lower among those with cirrhosis than among those without cirrhosis. The most common adverse events were headache, fatigue, nausea, and insomnia; the overall rate of discontinuation of sofosbuvir was low (1 to 2%). Conclusions: In patients with HCV genotype 2 or 3 infection for whom treatment with peginterferon and ribavirin was not an option, 12 or 16 weeks of treatment with sofosbuvir and ribavirin was effective. Efficacy was increased among patients with HCV genotype 2 infection and those without cirrhosis. In previously treated patients with genotype 3 infection, 16 weeks of therapy was significantly more effective than 12 weeks. (Funded by Gilead Sciences; POSITRON and FUSION ClinicalTrials.gov numbers, NCT01542788 and NCT01604850, respectively.)
The Effects of Adaptive Feedback on Student’s Learning Gains

There is an increase in the implementation of adaptive feedback models, which focus on the relationship between adaptive feedback and learning gains. These literatures suggest that the complex relationship between feedback, task complexity, pedagogical principles and student’s characteristics affect the significance of feedback effects. However, current studies have shown insufficient research on the effect of adaptive feedback characteristics on student’s learning gains. Thus, there is a need to investigate the effect of multiple adaptive feedback characteristics on student’s learning gains. The adaptive feedback model proposed supports the retrieval of appropriate feedback for students based on established weights between related concepts. In comparing three experimental groups, students who were provided with adaptive feedback showed learning gains and normalized learning gains of 0.87 and 0.05 over the normal feedback group, with 0.97 and 0.07 over the non-feedback group. This research yielded better outcomes than previous similar studies. Keywords—Authoring tools and methods; evaluation of CAL systems; intelligent tutoring systems; teaching/learning strategies; pedagogical issues
High Salinity Induces Differential Oxidative Stress Responses in Cowpea Genotypes at Early Seedling Stage

1 Department of Plant Biotechnology, College of Agricultural Biotechnology, Vidyaprathishthan, Baramati, MPKV, Rahuri, MS, India 2 Department of Plant Biotechnology, College of Agricultural Biotechnology, Madadgaon, MPKV, Rahuri, MS, India 3 Department of Plant Biotechnology, College of Agricultural Biotechnology, Wadala, MPKV, Rahuri, MS, India 4 Department of Botany, Govt. College Lamta, Balaghat, MP, India 5 ICAR Research Complex for Eastern Region, Patna, Bihar, India 6 Department of Biotechnology and Crop Improvement, College of Horticulture, UHS Campus, GKVK post, Bengaluru, Karnataka, India 7 All India Network Research Project on Arid Legumes, Indian Institute of Pulses Research, Kanpur, Uttar Pradesh, India
Effects of Corrosion on Mechanical Properties of Reinforcing Steel Residual Flexural Strength

The study examined the use of exudates/resins from extracts of natural origin for environmentally friendly materials derived from tree trunks. Gummy exudates/resin was applied directly to the steel reinforcement by the coating of different thicknesses. The purpose of this study is to determine the role of exudates/resin against adverse attack on reinforcement embedded in concrete, exposed to the severe environment due to its waterproofing and resistance to surface modification of steel reinforcement and coating application. In the flexural strength test, the maximum value was 28.36% compared to the corroded and coated sample values of -20.02% and 28.37%, respectively. Mean differential and percentile range controlled (0.96kN and 3.07%), corroded (0.82kN and 2.08%), coated (1.13kN and 3.33%). The results of midspan deflection mean value and percentage difference were controlled (0.27kN and 1.66%), corroded (0.57kN and 4.61%), and coated (0.27kN and 1.68%). The results showed a lower elongation load in the controlled and coated samples with reduction values over the corroded samples with higher elongation loads and higher values compared to the reference range (controlled). The cross-sectional area of reinforcing steel recorded the mean differential values and calculated percentile values, corroded (0.06 mm and 5.21%) and coated values (0.05 mm and 7.12%). The results obtained showed the effect of corrosion on the mechanical properties of reinforcing steel with a decrease in the diameter of the reinforcement in the corroded sample, while the coated sample showed an increase due to the thickness of the exudates paste layer. The differential computed average and percentile value of the yield strength and ultimate tensile strength are controlled (5.31MPa and 1.16%) and (2.53MPa and 0.02%), the corroded values are (3.18MPa and 1.05%) and (2.53MPa and 0.02%), the coated values are (5.3MPa and 1.16%) and (2.53MPa and 0.02%). The percentages of maximum weight loss/gain for corroded and coated samples were -28.54% and 43.9%, respectively. The calculated data showed a decrease in the value of the corroded sample as a result of the corrosion attack, which led to a decrease in the registered weight, whereas the coated sample showed an increase in weight compared to the reference value of the controlled sample due to the different coating thickness.
The Utilisation of Textbook in Teaching and Learning Mathematics among Primary School Mathematics Teachers

Mathematics textbook is commonly used in Malaysia education system as one of the free learning resources provided by the Ministry of Education of Malaysia over decades. However, not many researchers had investigated the utility of textbook among Malaysian primary school teachers in teaching mathematics. Hence, this paper aimed to investigate to what extend do Malaysian primary Mathematics teachers use textbooks in preparing their lesson plans and implement textbooks approach in teaching Mathematics. 50 mathematics teachers from nine states all over Malaysia participated in this survey via web-based questionnaire designed with Google Form. The findings of the study were analysed descriptively. The result shown that mathematics teachers had high reliability on textbook in preparing their lesson plan. Besides that, they also implemented textbook approach actively in the process of teaching Mathematics In general, most of the teachers had fully utilised mathematics textbook throughout teaching and learning of mathematics. Except for one, most teachers were found to skip certain topics in mathematics textbooks. This is an interesting issue that could be investigated by future researchers. This study is hoped to contribute to the development of textbooks utility in mathematics education.
Full Encryption: An end to end encryption mechanism in GaussDB

In this paper, we present a novel mechanism called Full Encryption (FE) in GaussDB. FE-in-GaussDB provides column-level encryption for sensitive data, and secures the asset from any malicious cloud administrator or information leakage attack. It ensures not only the security of operations on ciphertext data, but also the efficiency of query execution, by combining the advantages of cryptography algorithms (i.e
Productive performance and carcass characteristics of New Zealand white and California rabbits and their crosses

Objective: Evaluate the growth performance and carcass characteristics as well as the individual and maternal heterosis effects of New Zealand White (NZB), California (CA) rabbits and their crosses.Design/methodology/approach: 450 offspring rabbits, from 48 females mated to 6 stud rabbits, were evaluated, recording the weight (PNC) and litter size at birth (TCN) and at weaning (TCD), as well as, and weight (PMS), weight gain (GMD), consumption (CMS), and feed conversion (CONV) for during 8 weeks post-weaning. The carcass live weight at slaughter, warm carcass weight with head, carcass yield, and carcass parts of the carcass were evaluated.Results: Showed differences (p <0.05) in TCN and TCD with values of 10.47 and 9.03 kits, respectively. When NZB was used as the paternal breed, obtaining an individual heterosis of 5.91% for litter size and 12.44% for weaning weight. In the productive performance and carcass characteristics, the superiority of the California breed as a paternal breed was evidenced, with average values of 36.05 g in GMD and 2.95 kg in CONV. The averageindividual weight at the end of the fattening, at 70 days of age, was 2.09 kg and the weight of the carcass 1.16 kg. Post-weaning heterosis for the characteristics evaluated during fattening was were positive and moderate.Limitations on study/implications: It is necessary to carry out genetic improvement studies, with different crossing systems and to evaluate results based on the productive and reproductive behavior.Findings/conclusions: in reproductive characteristics, when using NZB as apaternal breed, the offspring are superior to those obtained from CA; while inthe productive variables, the offspring from CA show superior results.
A Study on Age and Gender Difference in Mental Health of Young Adults

The transition to adulthood is a continuous process of rapid developmental change that starts accelerating at age 16, and for most, is completed by age 30. It is an important and exciting time for all young people. During this period, most individuals take steps to live more independently and to depend less on family support. These steps, which involve completing school and training, launching work lives, and developing relationships with others, can greatly influence much of their future adult life. However, for youth and young adults with serious mental health conditions the changes during this stage of life are challenging and complex. During the transition to adulthood individuals are neither children nor mature adults; their development, functioning, and service needs are different from those who are older or younger (Transitions RTC, 2011). International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 10 Number 02 (2021) Journal homepage: http://www.ijcmas. com