Miracle-dz/UniFAR-FTUs huggingface dataset:
Locally Lorentz-Covariant Theory of Gravity Founded on Inertial Frame of Center of Mass. (arXiv:gr-qc/0512088v6 UPDATED)

A Locally Lorentz-covariant theory of gravity which is equivalent to general relativity in weak gravitational field is present. The space-time standard in local gravitational field is modified in terms of equivalence principle to keep consistent with that of inertial frame. The static metric in our theory agrees with Schwarzschild metric at first order approximation. The gravitational vector potential produced by a moving body is obtained by applying local Lorentz transformations in gravitational field. On the other hand, we still regard inertial frame, i.e. center of mass of the system, as the preferred frame of reference. This is because Newton's laws of motion hold only for inertial frames. The apsidal motion of binary system and the expansion of the universe can be explained reasonably when observed from inertial frame. Black holes and singularities do not exist in our theory.
Compact-calving systems are better suited to dual-purpose than dairy cow breeds, particularly when nutrient supply is limited

This study aimed to explore adaptive trajectories of dairy and dual purpose breeds in contrasting grazing-based feeding systems (FS). About 500 lactations were recorded at the INRA farm of Le Pinau- Haras, equally distributed among breeds (Holstein: HO or Normande: NO) and FS (High or Low). It was possible to study the different steps of the reproductive process by combining milk progesterone information (three times a week) with intensive oestrous behaviour recording and pregnancy diagnosis (ultrasonography). Holstein produced more milk (+2294 kg in the High FS, +1280 kg in the Low FS) and lost more body condition than NO. Cows in the Low FS produced less and lost more body condition than in the High FS. NO resumed ovarian activity earlier (-5 d) and showed a higher proportion of normal cyclicity patterns (+22%) than HO. There was no difference in ovulation detection rates between breeds or FS. The NO had a higher re-calving rate than HO (+19%). Feeding system was not associated with cyclicity and re-calving rate. By limiting their milk yield, NO did not experience a severe negative energy balance, unlike HO. This resulted in better reproductive performance for NO, suggestive of greater suitability to a compact calving system.
Oscillating PDE in a rough domain with a curved interface: Homogenization of an Optimal Control Problem

Homogenization of an elliptic PDE with periodic oscillating coefficients and associated optimal control problems with energy type cost functional is considered. The domain is a 3-dimensional region (method applies to any n dimensional region) with oscillating boundary, where the base of the oscillation is curved and it is given by a Lipschitz function. Further, we consider general elliptic PDE with oscillating coefficients. We also include very general type functional of Dirichlet type given with oscillating coefficients which can be different from the coefficient matrix of the equation. We introduce appropriate unfolding operators and approximate unfolded domain to study the limiting analysis. The present article is new in this generality.
Properties of the enzyme acetolactate synthase in herbicide resistant canola

: Mutations in the gene that encodes the enzyme acetolactate synthase (ALS), conferring plant resistance to ALS inhibitor herbicides, can reduce or inhibit enzymatic function. The objective of this work was to determine the functionality and kinetic characteristics of the enzyme ALS and evaluate the action of the herbicides imazapic (imidazolinone) and metsulfuron-methyl (sulfonylurea) on the activity of the enzyme ALS in canola hybrid Hyola 571CL (imidazolinone resistant), compared to hybrids Hyola 555TT (triazine resistant) and Hyola 61 (conventional). The plants were grown in a greenhouse, and leaves were collected to perform ALS activity analysis. The concentration of pyruvate to provide initial velocity equal to half the maximum reaction rate (K m ) and the maximum
A simple COVID-19 model applied to American states to simulate mitigation and containment strategies

The objective of the current work was to develop a simple predictive model of the spread of the novel coronavirus (i.e., 2019-nCoV or SARS-CoV-2) in the United States. The intent was to develop a simple, fast running model that could be used to make predictions regarding the effectiveness of various public policy proposals to mitigate or contain the spread of the virus. In the US, various states have adopted a patchwork of different strategies to manage the novel coronavirus disease (COVID-19) outbreak. The model can be used to predict medical resource needs to support comparison of possible strategies and forecast consequences in terms of virus-caused casualties.
Atlantic‐Pacific Gradients Drive Last Millennium Hydroclimate Variability in Mesoamerica

The paleoclimatic record from Mexico and Central America, or Mesoamerica, documents dramatic swings in hydroclimate over the past few millennia. However, the dynamics underlying these past changes remain obscure. We use proxy indicators of hydroclimate to show that last millennium hydroclimate variability was dominated by opposite‐signed moisture anomalies in northern and southern Mesoamerica. This pattern results from changes in moisture convergence driven by Atlantic‐Pacific interbasin temperature gradients. While this pattern is reproduced by several models and multiple experiments with a single model, models appear to disagree about the underlying dynamics of this interbasin gradient. Moreover, disagreement about the interbasin gradient, and associated hydroclimate pattern, dominates spread in 21st century regional hydroclimate projections. These results emphasize the role of interbasin asymmetries in governing past and future regional climate change. They also demonstrate that paleoclimate studies can elucidate mechanisms directly relevant to projecting future hydroclimate in climate change hot spots like Mesoamerica.
A 30-Year Perspective on Property Derivatives: What Can Be Done to Tame Property Price Risk?

The housing sector is the largest spot market in the world without a developed derivative contract to serve the risk management needs of market participants. This paper describes the evolution within a wider economic context of property derivatives in the United States and worldwide. We review various economic arguments presented in the literature to highlight the advantages of these financial instruments to society. The paper also provides a critical perspective on the principal obstacles hindering the development of property derivatives based on real estate pricesâ€”especially housing pricesâ€”and what can be done to overcome these difficulties. The issues discussed can serve as a guide for designing property derivatives capable of hedging real estate risk that has resurfaced time and time again in financial crises.
Enhanced Scratch Performance of Plasma Sprayed Hydroxyapatite Composite Coatings Reinforced with BN Nanoplatelets

In recent years, research on hydroxyapatite (HA) coatings has been driven by the demands of clinical applications. However, the intrinsic brittleness of HA limits its potential in the use for the load-bearing implant. To improve mechanical properties of the HA coating itself, a HA composite coating reinforced with hexagonal boron nitride nanoplatelets (BNNP) was fabricated using plasma spray, and its scratch behavior was investigated in this research. Typical brittle fractures such as microcracks both in and beyond the residual groove and material chipping were observed in the HA coating, while stronger and tougher BNNP/HA coatings exhibited a dominant role in protecting them from scratch damage through resisting plastic deformation and brittle microfracturing. Moreover, easier grain sliding within a splat and splat sliding at the splat boundaries due to the presence of BNNPs, and the nature porosity at different length scales of the as-sprayed HA composite coatings would provide significant self-lubricating effects to reduce the lateral force during scratching and alleviate the contact damage. Therefore, the addition of BNNPs renders HA coating with low scratch friction and enhanced tolerance to surface damage, which is naturally beneficial for the long-term durability and reliability of the implants.
Monitoring environmental microbiological safety in a frozen fruit and vegetable plant

Recently, the trend of frozen foods has been increasing worldwide due to globalization and busy lifestyle. Also, the reason for the preference is that these products can be stored and used for a long time and preserving the nutritional value. Nowadays, the global frozen food market is one of the major sectors of the food industry, estimated to reach approximately $ 282.5 billion by 2023 (Sowmya & Samsai, 2019).
The role of teamwork on team performance in extreme military environments: an empirical study

The purpose of this study is to explore the extent to which teamwork (developed either during an initial training phase or during a subsequent deployment phase) is influenced by the nature of the team’s environment (extreme vs non-extreme) and the extent to which teamwork is one of the explaining mechanisms for team performance. ,Data was collected from 60 teams at 2 time-points: training phase in The Netherlands or Germany and deployment phase (in locations such as Afghanistan and Bosnia-Herzegovina). ,This study’s results indicate that when teams consider working in extreme environments, they develop higher levels of teamwork as compared to teams expecting to work in non-extreme environments. These differences remain stable also during the deployment phase, such that teams operating in extreme environments will continue to have higher levels of teamwork as compared to teams operating in non-extreme environments. ,With this study, the authors contribute to the teamwork quality research stream by empirically studying how teamwork quality develops in unique military contexts such as extreme environments. Studies in such contexts are relatively rare.
Foxp1 controls neural stem cell competence and bias towards deep layer cortical fates

SUMMARY The laminar architecture of the mammalian neocortex depends on the orderly generation of distinct neuronal subtypes by apical radial glia (aRG) during embryogenesis. We identify critical roles for Foxp1 in maintaining RG identity and gating the temporal competency for early neurogenesis. High levels of Foxp1 are associated with early aRG and are required to promote proliferation and influence cell division symmetry, favoring aRG expansion and production of early born neurons. The potent pro-progenitor functions of Foxp1 are revealed through its ability to preserve a population of cells with aRG identity throughout development and extend the early neurogenic period into postnatal life. Foxp1 further promotes the formation of cells resembling basal RG (bRG), a progenitor group implicated in the increased size and complexity of the human cortex. Consistent with this role, we show that FOXP1 is associated with the initial formation and expansion of bRG during human corticogenesis. HIGHLIGHTS Foxp1 is transiently expressed by aRG during the early phase of corticogenesis Foxp1 promotes self-renewing vertical cell divisions and aRG maintenance Foxp1 gates the time window of deep layer neurogenesis Ectopic Foxp1 expression can elicit bRG formation
CORRELATES OF NON-ADHERENCE TO HOME EXERCISE PROGRAMMES IN PATIENTS WITH LOW BACK PAIN

Background: Non-adherence to home exercise programmes may lead to delayed progress in recovery and diminished clinical outcomes in patients. Aims of Study: To determine the adherence rate and attributing factors to non-adherence to home exercise programmes in patients with low back pain (LBP). Method: A total of 250 patients with LBP receiving treatment in 5 different out-patient physiotherapy clinics in Lagos State South West, Nigeria participated in this survey. They were required to complete a 27- item questionnaire which collected information on characteristics of participants and home exercise programme, adherence with treatment programme and instructions for carrying out the exercises. Gamma correlation and Chi-square were used to detect the correlation and significant difference of selected variables respectively. The level of significance was set at p< 0.05 Result: Ninety-four (37.6%) respondents performed home exercise programme the recommended number of times daily. There was no significant relationship (p> 0.05) of participants’ characteristics, frequency and duration of exercise per session, total number and manner of recommending the home exercise programme and pain rating respectively with adherence to home exercise programme. Eighty-nine (35.6%) respondents complained of tiredness after the day’s work. Chi-square showed significant association (p<0.05) of the prescribed home exercises programme, the actual exercise carried out at home with their perception to home exercise programme Conclusion: Home exercise programmes may interfere with normal life and daily routine in patients with LBP. It is recommended that home exercise programme be patient centred I.e. fit into individual daily routine to overcome identified barriers.
Penerapan Augmented Reality Hewan Burung Berdasarkan Klasifikasi Jenis Makanan Menggunakan Marker Based Tracking

Pendidikan pada anak merupakan sangat penting, maka aspek yang harus diperhatikan adalah dengan menggunakan metode media pembelajaran. Salah satu nya dengan pemahaman mengenai pembelajaran klasifikasi hewan berdasarkan jenis makanannya, yang dimana pembelajaran tersebut merupakan sub tema dalam Ilmu Pengetahuan Alam. Dalam kegiatan belajar disekolah tentang pemahaman penggolongan hewan berdasarkan makananya hanya disampaikan dengan presentasi atau hanya membaca buku pelajaran. Dengan adanya media alternatif berbeda berupa Augmented Reality , dapat membantu dalam mendukung proses belajar dalam memahami ilmu klasifikasi hewan burung berdasarkan makanannya yang dapat dilakukan diluar kegiatan belajar. Teknologi Augmented Reality digunakan dalam penelitian ini sebagai upaya dalam pemberian materi belajar mengajar disekolah menjadi lebih inovatif dan visual kepada para murid dalam belajar. Penelitian ini menggunakan teknologi AR yang dimana memerlukan suatu penanda atau marker sebagai acuan sistem dalam memunculkan objek 3D. Penggunaan marker ini merupakan suatu metode yang beranama metode Marker Based Tracking. Hasil dari pengujian membuktikan bahwa jarak pendeteksian dipengaruhi resolusi dari pixel, warna dan pencahayaan marker yang dapat diterima oleh system.
A Review of the Power Converter Interfaces for Switched Reluctance Machines

The use of power electronic converters is essential for the operation of Switched Reluctance Machines (SRMs). Many topologies and structures have been developed over the last years considering several specific applications for this kind of machine, improving the control strategies, performance range, fault-tolerant operation, among other aspects. Thus, due to the great importance of power electronic converters in such applications, this paper is focused on a detailed review of main structures and topologies for SRM drives. The proposed study is not limited to the classic two-level power converters topologies dedicated to the SRMs; it also presents a review about recent approaches, such as multilevel topologies and based on impedance source network. Moreover, this review is also focused on a new class of topologies associated to these machines, namely the ones with fault-tolerant capability. This new category of topologies has been a topic of research in recent years, being currently considered an area of great interest for future research work. An analysis, taking into consideration the main features of each structure and topology, was addressed in this review. A classification and comparison of the several structures and topologies for each kind of converter, considering modularity, boost capability, number of necessary switches and phases, integration in the machine design, control complexity, available voltage levels and fault-tolerant capability to different failure modes, is also presented. In this way, this review also includes a description of the presented solutions taking into consideration the reliability of the SRM drive.
Augmented reality: capabilities and challenges in machining industry aligned with industry 4.0

ABSTRACT Augmented Reality (AR) currently plays an important role to undertake the challenges in integrating technologies to expedite the march towards Industrial Revolution 4.0 (IR 4.0). Therefore, the machining industry relies on new design concepts and methods of an innovative human–machine interaction application that overlays virtual components on a real-world environment. Nowadays, many potential applications being developed in different fields, from gaming activities to everyday life, education and industrial sectors. This paper reviews and investigates the capabilities of AR as new emerging technologies that will improvise machining operation to embrace Industry 4.0 (I4.0) for product precision, cost and maintenance. Due to the massive implementation, there are still several challenges that lie ahead include resources, facilities and etc. The I4.0 has been considered a new industrial stage in which several emerging technologies are converging to provide digital solutions. In future, AR will change the perception of people viewing the world and its objects and to help us see, hear and feel our environments in various fields. As a result, AR will support and enhance the psychomotor phase in human skills development as well as a tool of cybergogy concept for engaging learners online.
Mycotoxicosis – diagnosis, prevention and control: past practices and future perspectives

Abstract Mycotoxins pose severe health hazards in animals, humans, and poultry birds. More than 400 chemically different mycotoxins have been identified to date. Twenty-five percent of world’s crops are potentially contaminated with mycotoxins. Luckily, nature has provided the ruminants a unique property of inactivating and detoxifying most of the mycotoxins with the help of microflora and microfauna present within their ruminal fluid; however, unfortunately avian species lack such ability putting them at high risk to the deleterious effects of mycotoxins. This review elaborates different strategies for diagnosis, prevention and control of mycotoxins.
Elimination of polarization effect in DC measurement of resistivity of CNT-cement composites

Multi-walled carbon nanotubes (CNT) may serve as electrically conducting fillers for traditional cement-based materials. Introducing small amount of CNT in the matrix of concrete turns the latter into a smart piezoresistive material applicable for the structural health monitoring of reinforced concrete structures. CNT–cement composites are subject to polarization during direct current (DC) resistance measurement. This phenomenon results in increase of electrical resistance of composites hindering their practical application. Suggestions for dealing with polarization usually include using alternate current measurements or applying direct current until resistance readings stabilize. This paper presents simple two-probe resistance sensing technique with DC being applied to the specimens as single square waves. Suggested approach is experimentally validated on the samples of CNT–cement composites. No polarization was observed in tested specimens when the periods between measurements were larger than 3 min. Such frequency of measurements is quite acceptable for monitoring the stress state of structures under static loading.
Knowledge Mapping on Literature Research Progress of Human Thermal Comfort in buildings Based on Web of Science

This study focused on hot topics and front of thermal comfort in buildings by knowledge mapping of 577 research papers from 2009 to 2019 in the database of Web of Science as samples. CiteSpace software was used as the analyzing tool. The results showed the trend of the published researches on thermal comfort by analyzing high-frequency co-occurrence keywords and the keywords’ frequency variation. The results also showed that the researches on thermal comfort about health had increased rapidly in recent years. Moreover, the institutions and authors involved in healthy indoor thermal environment were mostly from economically developed countries or regions. However, the productive author collaboration network had not been formed yet. Improving environmental quality is the forefront of current researches. The research of indoor environmental quality based on health may be a hot topic in the future.
Infodemia y COVID-19. Evolución y viralización de informaciones falsas en España

Introducción: La verificación de la información supone un reto democrático especialmente en periodos de excepcionalidad y crisis. Objetivo: Analizar el tipo de bulos identificados durante la pandemia del COVID-19 según su temática, fecha de verificación, canales de distribución, intencionalidad, viralización en otros países e identificación de sus promotores. Metodología: Se han analizado 166 bulos reportados por la organización Maldita.es a la plataforma de verificación colaborativa LatamChequea desde el 14 de febrero al 15 abril de 2020. Resultados: Entre los principales resultados destaca la alta presencia de bulos en torno a contagios y medidas de prevención. Conclusiones: El aumento de la desinformación se desarrolla en paralelo a la evolución de la pandemia, destaca la viralización de los bulos mediante redes sociales y servicios de mensajería instantánea, además de su alcance internacional y la alta dificultad para identificar a sus promotores.
Magnetic surveys locate Late Bronze Age corrals

A new type of livestock enclosure from the Late Bronze Age has been discovered. Stone walls outline a pair of circular or oval areas that may be up to 50 m in diameter. The stone walls are invisible at the surface; they were discovered in north‐western Crimea and only with the aid of remote sensing and geophysical surveys. In the period 2007–2020, over two dozen of these structures were found; none has ever been noted before. The locations of these sites were first suggested in satellite imagery, often as areas with unusually green vegetation. Then, large‐area magnetic surveys delineated the buried stone enclosures, for there was a good contrast between the non‐magnetic limestone walls and the rather magnetic soil. The features can be identified by the unique pattern of the walls: An almost‐complete circular arc that is connected to a full circle or oval. The soil within the features has a high level of urease enzyme activity and a high concentration of thermophilic microorganisms. This suggests the composting of animal dung and plant residues; therefore, these were corrals and the raising of livestock was a part of the economy. Only one of the doubled enclosures is found at most settlements; the livestock were probably owned by all of the inhabitants. Each settlement had several dwellings, and these had earthen basins whose edges were lined with vertical stone slabs. Several small‐area excavations exposed corral walls. Magnetic measurements of the soil and rock were the basis for magnetic models; the calculated anomalies agree with the measurements of the magnetic maps.
On the Generation of Infinitely Many Conservation Laws of the Black-Scholes Equation

Construction of conservation laws of differential equations is an essential part of the mathematical study of differential equations. In this paper we derive, using two approaches, general formulas for finding conservation laws of the Black-Scholes equation. In one approach, we exploit nonlinear self-adjointness and Lie point symmetries of the equation, while in the other approach we use the multiplier method. We present illustrative examples and also show how every solution of the Black-Scholes equation leads to a conservation law of the same equation.