bluuebunny/crossref_metadata_2025 huggingface dataset:
Knowledge, perception and utilization of biofortified cassava and orange-fleshed sweet potato (OFSP) in selected rural areas in Nigeria
Authors:   Michael Okpara University of Agriculture Umudike (MOUAU), Abia State, Nigeria, Adaugo Uzokwe Chinwe , Iheme GO ,   Michael Okpara University of Agriculture Umudike (MOUAU), Abia State, Nigeria, Oteh OU ,   Michael Okpara University of Agriculture Umudike (MOUAU), Abia State, Nigeria, Ewude MC ,   Michael Okpara University of Agriculture Umudike (MOUAU), Abia State, Nigeria, Uruakpa Q ,   Michael Okpara University of Agriculture Umudike (MOUAU), Abia State, Nigeria
Published: July 2021

Vitamin A deficiency is a major public health problem in Nigeria. Staple crops are targeted by biofortification efforts because they possess low micronutrient density and are consumed in large quantities by a large proportion of poor households. This study was designed to assess the knowledge, perception and utilization of biofortified cassava and orange-fleshed sweet potato in selected Local government Areas in Abia and Imo States. The study was descriptive and cross-sectional in design. A total of 710 respondents were selected using a multi-stage sampling technique. A structured interviewer-administered questionnaire was used to elicit the required information. Statistical analysis was performed using descriptive statistics(frequency, percentage, mean and standard deviation)and inferential(correlation)analysis. Socio-demographic data revealed a preponderance of females, married, well-educated and working-class respondents. Monthly income above ₦29,000(US$ 70.54) and household size of 4-6 members were reported in 53.5% and 48.6% of the respondents. Study results further revealed that some (34.9%)of the respondents had good knowledge, while 46.1% and 19.0% had an average and poor knowledge of biofortified staples, respectively. Orange fleshed sweet potatoes and biofortified cassava were purchased at least once monthly by 73.7% of the respondents, however 16.5% and 27.5% of the respondents consumed these biofortified staples on a daily and weekly basis. Low positive perception towards the consumption (27.5%), benefits (39.6%) and barriers (16.9%) of utilizing studied biofortified staples was reported. A positive correlation was observed between respondents’ knowledge of biofortified staples and their benefits perception (p = 0.003), purchase (p =0.001) and consumption (p= 0.001) frequency.Therefore, while a good number of the respondents were fairly knowledgeable about the studied biofortified staples, it significantly influenced the perception and utilization of these staples, despite being reportedly low. Therefore, increased sensitization, price subsidy and availability of these biofortified staples will help improvetheir acceptance and utilization among rural households.
A New Approach to Mathematical Simulation of Sheduling at an Industrial Plant
Authors: Savenkova N.P. , Laponin V.S. , Mokin A.Yu. , Artemieva L.A. , Dryazhenkov A.A.
Published: July 2021

The purpose of this work was to build a model of industrial plant management and develop a schedule plan based on it. The paper considers a controlled model of product flows at an industrial enterprise. The model describes the interaction between various objects at the enterprise: production plants, manifolds, overpasses, piers, transport. In addition, the model specifies the composition and proportions of the components of raw materials and additives for each type of manufactured product, as well as physical constraints on the objects involvedin the production process. This brings us to the model of both the quality functional and equality and inequality constraints in the mathematical formulation. After building the model, the original control problem was reduced to two problems: direct and inverse. The numerical solution of both is provided in a close relationship between them. The study uses the findings from the theory of mathematical modeling, linear algebra and optimization theory, and leads to the development of the technique of building models of scheduling at an enterprise and numerical methods for solving the corresponding management problems. The research results are of great practical importance and can be used for effective management of the production process in many industries
Leontev Input-Output Balance Model as a Dynamic System Control Problem
Authors: Masaev S.N.
Published: July 2021

The purpose of the study was to determine the problem of control of a dynamic system of higher dimension. Relying on Leontev input-output balance, we formalized the dynamic system and synthesized its control. Within the research, we developed a mathematical model that combines different working objects that consume and release various resources. The value of the penalty for all nodes and objects is introduced into the matrix representation of the problem, taking into account various options for their interaction, i.e., the observation problem. A matrix representation of the planning task at each working object is formed. For the formed system, a control loop is created; the influencing parameters of the external environment are indicated. We calculated the system operational mode, taking into account the interaction of the nodes of objects with each other when the parameters of the external environment influence them. Findings of research show that in achieving a complex result, the system is inefficient without optimal planning and accounting for the matrix of penalties for the interaction of nodes and objects of the dynamic system with each other. In a specific example, for a dynamic system with a dimension of 4.8 million parameters, we estimated the control taking into account the penalty matrix, which made it possible to increase the inflow of additional resources from the outside by 2.4 times from 130 billion conv. units up to 310 conv. units in 5 years. Taking into account the maximum optimization of control in the nodes, an increase of 3.66 times in the inflow of additional resources was ensured --- from 200.46 to 726.62 billion rubles
Strain of Pseudomonas syringae causes bacterial leaf spot in marigold plants (Tagetes erecta) in Mexico
Authors: Maldonado-Bonilla Luis David , Hernández-Guzmán Gustavo , Martínez-Gallardo Norma Angélica , Hernández-Flores José Luis , Délano-Frier John Paul , Valenzuela-Soto José Humberto
Published: July 2021

El cempasúchil (Tagetes erecta) es una planta asterácea comúnmente utilizada como flor ornamental y ceremonial durante la temporada de otoño en México. Las plantas de cempasúchil cultivadas en el campo presentaron síntomas de la enfermedad de la mancha foliar bacteriana. Se aisló una cepa bacteriana que potencialmente causa la enfermedad de las manchas. El objetivo principal de esta investigación fue clasificar esta bacteria y evaluar su patogenicidad en cempasúchil y otras especies vegetales. El perfil bioquímico identificó esta cepa como Pseudomonas syringae LF2012. El análisis filogenético del gen ARNr 16S reveló una estrecha relación con genomoespecies de Pseudomonas. El perfil de macrorestricción I-CeuI del cromosoma confirmó su alto grado de similitud con distintos patovares de P. syringae. P. syringae LF2012 causa la enfermedad de las manchas cuando se inocula por aspersión en hojas de cempasúchil. Los ensayos de infección de plantas de otras familias (Asteraceae, Brassicaceae, Amaranthaceae, Poaceae y Solanaceae) sugirieron que la enfermedad podría limitarse al cempasúchil. Además, esta cepa provoca respuestas de tipo hipersensible en hojas de Nicotiana tabacum.
Caracterización del sistema de producción de arroz criollo en La Mojana, en Colombia
Authors: Cadena Torres Jorge , Cuello Pérez Diana Maria , Romero Ferrer Jorge Luis , Pérez Cantero Shirley Patricia
Published: July 2021

La Mojana, es una subregión con paisajes dominados por grandes cuerpos de agua, interconectados por una red de caños y ciénagas. Uno de los sistemas productivos de mayor importancia social es el arroz criollo, al cual se dedican pequeños productores de economía campesina. Dado a que se desconocen aspectos socioeconómicos y técnicos de este sistema, se realizó una caracterización del sistema mediante el método de encuestas estructuradas que captaron aspectos sociales, técnicos y económicos. El método de muestreo usado fue el no probabilístico y los datos se analizaron mediante estadística descriptiva, con medidas de tendencia central y dispersión. Los resultados mostraron que los agricultores de arroz criollo llevan más de 40 años dedicados a esta actividad productiva, en pequeñas áreas de terreno de la finca. Parte de la producción es comercializada en los mercados locales y otra parte es usada para la alimentación del núcleo familiar, por lo que tiene gran importancia en la seguridad alimentaria. A pesar de existir oferta de variedades mejoradas, de mayor rendimiento, buena parte de los agricultores prefieren para su alimentación este tipo de arroz debido a que le atribuyen una mejor calidad culinaria y nutricional. Se identificaron al menos 46 variedades utilizadas para la siembra, la cual se realiza de forma manual con muy baja entrada de insumos de origen químico. Se identificaron las principales limitantes tecnológicas del sistema y se determinaron los costos y rendimientos, lo cual permitió calcular un costo unitario de US$0,40 kg-1. El principal riesgo que enfrenta este sistema productivo es la pérdida de semillas ancestrales, por lo que se propone la conservación, purificación y escalamiento de las variedades criollas, para devolverlas a la comunidad y así contribuir a la seguridad alimentaria de la población de pequeños productores vinculados a este sistema.
Caracterización de sistema de bioseguridad en granjas avícolas, en el municipio de Chinácota, Norte de Santander.
Authors: Solano Rojas Rito Arnulfo
Published: July 2021

El presente estudio tiene como objetivo, cuantificar los aspectos de bioseguridad que deben cumplir las granjas avícolas presentes en el municipio de Chinácota. Inicialmente en la investigación, se identificaron las granjas avícolas en el municipio de Chinácota, dando un total de 128 granjas, clasificadas en 41 registradas ante el Instituto Colombiano Agropecuario (ICA) y 87 no registradas, de estas, se seleccionó una muestra representativa del 30% de cada grupo equivalente a 38 granjas avícolas distribuidas en 12 registradas y 26 no registradas ante el ICA. Se utilizaron dos instrumentos para la recolección de información, la técnica de lista de cotejo, el método de análisis con el paquete estadístico Spss21 y, análisis de los resultados mediante el uso de gráfica o tabla; para determinar la confiabilidad interna de la lista de chequeo se le aplicó el Kuder Richarson; por último, se hizo la triangulación de actores. Los resultados obtenidos por el instrumento 1 (lista de chequeo) arrojaron que el 50% (19 granjas) de la muestra cumple con los requisitos establecidos; en los ítems específicos, se tiene un 40% de cumplimiento en promedio. En cuanto al instrumento 2 (Evaluación de los factores socio – económicos), se puede resaltar la falta de conocimiento, capacitación, acompañamiento a los productores y como principal limitante el factor económico para la implementación de sistemas de bioseguridad. Por último, se analizó e interpretó la información, considerando medidas pertinentes que mejoren la adopción del sistema de bioseguridad a nivel de las granjas, generando un producto con calidad e inocuidad.
Towards optimizing acorn use as animal feed in Tunisia: evaluation and impact on natural regeneration
Authors: STITI Boutheina , KHALFAOUI Mariem , BAHRI Salima , KHALDI Abdelhamid
Published: July 2021

In Mediterranean forests, besides the conflict between forest managers and local populations who are often poor and dependent on livestock for survival, the cost of raw materials used in animal feed is increasingly a burden for farmers. There is growing recognition that wise use of acorns can reduce feed costs and enhance sustainable participatory governance of these woodlands. This paper aimed to carry out a quantitative, qualitative and economic evaluation of acorn potential in a cork oak forest in north-western Tunisia and to investigate the impact of their post-dispersal on natural regeneration. Quantities were estimated in November and February, respectively for acorns collected directly from trees and from the ground. Time-dependent monitoring of acorn quality and numbers of new seedlings was also conducted from autumn 2014 to spring 2015. The results show a significant decrease in acorn quantity from 5.28 ± 4.61 t/ha in November to 0.684 ± 0.1 t/ha in February. However, this loss did not put the early stages of natural cork oak regeneration at risk since the percentage of acorns not able to germinate was estimated at only 37% in late February. Furthermore, the average number of new seedlings was estimated in April at 40,000 seedlings/ha. A model was fitted to predict tree acorn production and to establish the best agroforestry system to optimize acorn use. Based on acorn quantity and quality data, earlier acorns should be directed to nursery and livestock production and the later acorns to wildlife and natural regeneration.
When parents wish to reduce their work hours: Does sorting into occupations and work organizations explain gender differences in working-time adjustments?
Authors: Lükemann Laura
Published: July 2021

Objective: This study investigates whether sorting into occupations and work organizations contributes to gender differences in parents’ likelihood to reduce their working hours.

Background: While mothers reduce their work hours to reconcile their work and personal lives, fathers increasingly wish to reduce their hours but face obstacles to doing so. Mismatches between parents' desired and actual work hours prompt the question of whether fathers' realization of working-time reductions is constrained due to their sorting into more time-intensive occupations and/or work organizations.

Method: Cross-classified multilevel models were applied to German linked employer-employee data analyzing gender differences in parents' likelihood of reducing work hours. Including sorting indicators, the question of whether differences in full-time employed mothers' and fathers' working-time reductions were driven by sorting into different work contexts (occupations/work organizations) was explored.

Results: The results confirmed that full-time employed mothers are more likely to reduce their work hours than full-time employed fathers. While occupations play almost no role in determining working-time adjustments, work context does at least partly contribute to parents’ variation in working-time reductions. However, neither gendered sorting into occupations nor gendered sorting into work organizations explained gender differences in parents’ likelihood of scaling back their work hours.

Conclusion: It is concluded that gender differences in German parents' reduction of working hours rather respond to traditional gender norms than being influenced by the different occupations or work organizations mothers and fathers sort themselves into.
Gestos de interpretação e função-autor no blog Nodanakaroda
Authors: Ferreira Lucimar Luisa
Published: July 2021

Neste trabalho, discutimos o funcionamento de gestos de interpretação e autoria no processo de textualização em um blog pessoal de um autor indígena Baniwa. Na tentativa de entender o que é ser autor a partir das novas condições de produção em suporte digital, utilizamos como fundamento teórico noções da Análise de Discurso. Com esse aporte teórico, o objetivo do trabalho é compreender os gestos de interpretação do sujeito indígena ao assumir a função-autor no blog. O corpus é formado por posts recortados do blog pessoal Nodanakaroda. Através da análise, apresentamos a possibilidade de autoria em blogs pessoais e o que essa autoria pode significar para os índios Baniwa na produção e circulação de seus gestos de interpretação na rede mundial de computadores.
Epidemias e as cidades como síntese do progresso e das desigualdades
Authors: Toledo Rodrigo Alberto , Dias Rafael de Brito , Gonçalves Junior Oswaldo
Published: July 2021

O artigo propõe elaborar uma análise da história do enfrentamento técnico-científico de epidemias do final do século XIX até as duas primeiras décadas do XX. O espaço urbano, território de expansão do capitalismo, de investimentos dos detentores de excedentes de capital, apresenta assimetrias socioeconômicas que potencializam epidemias e escancaravam desigualdades sociais. A partir da sistematização de fontes documentais e bibliográficas apresentaremos o cenário urbano em que se deram as principais epidemias de febre amarela, varíola e, atualmente, o Covid-19. A morfologia urbana, o desenho da cidade e as desigualdades sociais e de acesso à terra urbanizada são as pedras angulares de nossas análises no presente artigo.
The Effect of Pre-Hospital Stroke Life Support Education on Family Knowledge and Self-Efficacy with Stroke Risk Patients
Authors: Kholidiyah Dinda Dhia Aldin , Bakar Abu , Wahyuni Erna Dwi
Published: July 2021

Introduction: Knowledge and self-efficacy are some of the factors in providing pre-hospital stroke life support so that it is expected to reduce mortality and morbidity due to stroke in Indonesia. The purpose of this study was to determine the effect of pre-hospital stroke life support education on the knowledge and self-efficacy of families with stroke risk patients.Methods:The study design used a pre-experiment (one-group pre-posttest design). The sample comes from families who have stroke risk patients in the working area of Puskesmas Pacar Keling Surabaya. The sampling technique used purposive sampling with inclusion criteria of having family members at risk of stroke (diagnosis of hypertension, diabetes, cholesterol, heart disease, smoking, alcoholics, obesity, and the elderly), so a sample of 32 people was obtained. The independent variable is health education pre-hospital stroke life support, while the dependent variable is knowledge and self-efficacy. The research instrument used a questionnaire. The research was conducted online via WhatsApp and google form, then analyzed by using the Wilcoxon Signed-Rank Test using SPSS with significance α ≤ 0.05.Results:The results of statistical tests showed that there was an effect of pre-hospital education stroke life support on family knowledge (p = 0.002) and self-efficacy (p = 0.000).Conclusion:There is an effect of pre-hospital stroke life support education on knowledge and self-efficacy of families with stroke risk patients in the working area of Puskesmas Pacar Keling Surabaya.
Nonlinear Analysis of a Quasi-Zero Stiffness Air Suspension Based on the Cell-Mapping Method
Authors: Chen Long , Wang Jun , Xu Xing , Jiang Xinwei , Wang Feng
Published: July 2021

The quasi-zero stiffness system has the characteristics of low dynamic stiffness and high static stiffness, which can bring a better driving experience and lower road dynamic load at high speed on irregular roads. This paper studies a type of interconnected quasi-zero stiffness air suspension system, which has two states, namely, the non-interconnected quasi-zero stiffness air suspension and the interconnected quasi-zero stiffness air suspension, to meet the performance requirements under different loads and vehicle speed. First, the mathematical model of the nonlinear system is established based on the basic principles of fluid mechanics and thermodynamics. Then, the stability of the equilibrium point is analyzed using the Lyapunov first method, where the quantitative analysis of the attractive region of the system is conducted through the bifurcation diagram and phase diagram. By using the Taylor series expansion, cell-mapping theory and domain map of attraction, the attractive region of the system is quantitatively analyzed to obtain the parametric feasible domain under stable conditions. Finally, the performance of the quasi-zero stiffness suspension system with the selected parameters under the stability constraint is verified by simulation analysis and experiment. The results show that the system represented in this paper provides higher suspension comfort and stability.
Budapest, Bratislava and Vienna conference facilities, comparative analysis
Authors: Bartfai Endre Gyorgy
Published: July 2021

The aim of this study is to give an overview of conference facilities in three capital cities in the Central European area, along the Danube, analyse and compare their possibilities and venues. The utilized data within the study was collected from different sources, like websites of the Hungarian, Slovakian and Austrian Convention Bureaus, books dealing with convention and event management and statistics, ICCA publications. Budapest is highly ranked between cities transacting conferences for years. There are 146 different conference facilities with a total capacity for 114.000 participants. The 7 conference centres and all four- and five-star hotels suit all requirements of the different professional organizations. Budapest hosted many megaconferences; out of these the ASTA yearly session and the vein-surgery conference can be excelled. From the conference capacity of Budapest only one conference facility is missing which could host more than 5.000 participants. After analysing the conference capacities of the three Danube-band capitals – Budapest, Vienna, Bratislava, – it can be seen what kind of similarities and differences are characterizing the cities. At the end of this study the writer makes recommendations for the place of the mega-conference centre, the development of a modern and up-to-date conference database, as well as for the cooperation of the three capitals in connection with managing mega-conferences.
Some Results for a Time Interval Approach to Field Theory and Gravitation
Authors: Hollestelle Harmen Henricus
Published: July 2021

This paper consists of two parts. In part I some new relations for a field theory with time intervals are derived. One concept of field theory evaluated is complementarity, another is operators however both defined within a time interval description. Part II includes specific results and commentary. Discussed are time interval dependent wave propagation surfaces for star source emission waves and derived is a metric surface area requirement for propagation surfaces. The results allow to consider one field that like gravitation within General Relativity applies to both non zero and zero mass. The associated field energy is space time dependent for non zero mass, and is related to a space time dependent metric tensor for zero mass wave particles. Defined is internal energy transfer where wave particle numbers increase linearly and mass and momentum diminish, decrease inversely with the distance from the wave emission source. The commentary are applications related to cosmological overall volume and temperature dependence.
Stanene the New Gas Sensing Wonder Material: Current Status and Future Prospects
Authors: Ramanathan Amall Ahmed , Aqra Maha W
Published: July 2021

In the search for new 2D materials beyond graphene with similar exemplary properties Stanene the new graphene relative was successfully synthesized and characterized in 2016 [14]. This new material which consists of atomically thin tin (Sn) atoms arranged in a hexagonal lattice has shown great promise in gas sensing applications in its pristine, doped and functionalized forms as evidenced by the recent research outputs following its discovery. Researchers have discovered that with its exotic properties it is highly efficient in the detection of the environmentally harmful gases like SO2, NO2, CO2, NH3 and can serve as a multifunctional gas sensor. In this focused and up-to-date review we aim to group the literature on first principles studies of stanene regards to its application for gas sensing and critically examine the success/failures of its multifunctional gas sensing properties as compared to graphene. We systematically present and discusses how structural deformations, defects and doping effect the gas sensing performance. Despite the impressive progress in the field of gas sensing with stanene shown by first principles calculations, many challenges in large scale synthesis, device fabrication and commercialization need to be addressed. The current review can help understand the current status and drawbacks of stanene and identify future directions in this field.
Nucleic Acid Sensing in the Tumor Vasculature
Authors: Baris Adrian M. , Fraile-Bethencourt Eugenia , Anand Sudarshan
Published: July 2021

Endothelial cells form a powerful interface between tissues and immune cells. In fact, one of the underappreciated roles of endothelial cells is to orchestrate immune attention to specific sites. Tumor endothelial cells have a unique ability to dampen the immune responses and thereby maintain an immunosuppressive microenvironment. Recent approaches to trigger immune responses in cancers have focused on activating nucleic acid sensors such as cGAS/STING in combination with immunotherapies. In this review, we present a case for targeting nucleic acid sensing pathways within the tumor vasculature to invigorate tumor immune responses. We introduce two specific nucleic acid sensors, the DNA sensor TREX1 and the RNA sensor RIG-I and discuss their functional roles in the vasculature. Finally, we present perspectives on how these nucleic acid sensors in the tumor endothelium can be targeted in an antiangiogenic and immune activation context. We believe understanding the role of nucleic acid sensing in the tumor vasculature can enhance our ability to design more effective therapies targeting the tumor microenvironment.
Gender Dimensions in Disaster Risks Reduction Policy: Insights from Bangladesh
Authors: Roy Sajal , Mallick Bishawjit , Bhattarai Utsab
Published: July 2021

This paper aims to delve into how gender dimensions observed before, during and after a disaster, have been addressed in two internationally recognised frameworks developed for reducing risks of disasters: Hyogo Framework Action (2005-2015) and Sendai Framework for Disaster Risk Reduction (2015-2030). Building on a systematic review, we evaluate 33 scholarly peer-reviewed journal articles, including book chapters and websites in areas of gender, disaster risk reduction and vulnerability. This study documents a comparative picture of these two frameworks and shows the practical implications of the Sendai Framework for Disaster Risk Reduction (SFDRR) by addressing women’s empowerment in the light of their active participation in disaster risk reduction process. The findings of the study suggest that the frameworks have discussed the reduction of women’s socioeconomic vulnerabilities, as well as encouraged their empowerment. Comparing the two frameworks, it appears in the current study that there has been a significant gap in the existing literature that does not explicitly document comparing and contrasting features of a gender lens in the policy documents.
Cost-Benefit Analysis of Flood Management, a Case Study of Jammu and Kashmir
Authors: Jan Kowser Ali
Published: July 2021

A disaster wrecks those affected. It spares many in the affected areas, yet those spared may be indirectly impacted. Specific risks are often inherent within a social system or physical location, but they can also be created due to unavoidable natural or technological hazards. The consequences, however, can be similar in that they wreak havoc in communities and destroy economic systems. The analytical framework of deterrence and coping has ascertained beneficial in many circumstances, but a cost benefit calculation is a must to infer the feasibility of planning strategy and resource allocation. This study points to the Cost-Benefit Analysis (CBA) of flood management by District Disaster Management Kulgam. The assessment is established on secondary pooled data collected from administration offices, NGOs, published Journals, and local and national newspapers. It also characterised the strategy, the technique adopted, and the sources of flood damage cost information. The totalled benefits report for 78686.18 lakh of rupees, and that of total costs account for 2218.75lakh of rupees. The Benefit-Cost ratio greater than one (>1) indicates that Flood Management in District Kulgam was economically feasible and successfully governed. The State of Jammu and Kashmir put up with necessary prevention and administration measures to break the spell of devastation due to floods to significant status.
From Molecular Biology to Epithelial Carcinogenesis
Authors: Mendez Fernando
Published: July 2021

The theory of the origin of carcinomas suggests that neoplasias from epithelial tissues are the consequence of the reactivation of developmental programs. It proposes a model in which the epithelial cells undergo cellular transitions due to replicative senescence and inflammation towards a mesenchymal-undifferentiated phenotype with cancerous behavior. The conserved pattern of histological progression and the molecular biology of carcinomas is congruent with the view of cancer as a developmental disease. In support of the theory, the experimental literature regarding the molecular, cellular, and histopathological mechanisms associated with epithelial carcinogenesis were aligned according to the premises of the hypothesis. Thereby identified a generic process in the carcinogenesis of the breast, endometrium, prostate, colon, lung, pancreas, bladder, liver, and cervix. Then, is provided a methodology overview of modeling in systems biology derived from previous research testing the hypothesis. The results illustrate the value of the complex systems approach to recover behavior that cannot be inferred only by traditional methods. Specifically, the model suggests that the consistency in the cell types and the directionality of the observed cellular transitions during epithelial carcinogenesis arise from structural constraints in the molecular networks associated with the carcinomas. Overall, the results of the dynamical analysis agree with the premises of the hypothesis and provide an insightful perspective of the potential mechanisms underlying the cellular plasticity displayed during epithelial carcinogenesis. In an era of big data and yet few advances in the underlying causes of chronic diseases, the manuscript also aims to inspire molecular biologists to integrate existing empirical evidence with systems biology modeling in the pursuit of understanding.
Weak Deflection Angle of Kazakov-Solodukhin Black Hole in Plasma Medium
Authors: Javed Wajiha , Hussain Iqra , Övgün Ali
Published: July 2021

In this paper, we study light rays in a Kazakov-Solodukhin black hole. To this end, we use the optical geometry of the Kazakov-Solodukhin black hole within the Gauss-bonnet theorem. We first show the effect of the deformation parameter $a$ on the Gaussian optical curvature, and then we use the modern method popularized by Gibbons and Werner to calculate the weak deflection angle of light. Our calculations of deflection angle show how gravitational lensing is affected by the deformation parameter $a$. Moreover, we demonstrate the effect of a plasma medium on weak gravitational lensing by the Kazakov-Solodukhin black hole. We discuss that the increasing the deformation parameter $a$, will increase the weak deflection angle of the black hole. Our analysis also uncloak how one may find a observational evidence for a deformation parameter on the deflection angle.
Parametric Point Cloud Slicing for Facade Retrofitting
Authors: Gámez Bohórquez Oscar , Derigent William , Bril El Haouzi Hind
Published: July 2021

Current commitments by European governments seek to improve energy consumption as a means to reduce carbon emissions from building stock by 2050. Within such context, retrieving reliable three-dimensional contours from point clouds becomes an important step in developing facade retrofitting solutions since facade retrofitting projects often make use of as-built 3D models to help reduce inaccuracies by narrowing interpretation and measurement errors. This work aims to provide a method that uses topology-based parametric modelling for reconstructing building envelopes from point clouds. Through a semi-automated process that gives permanent visual feedback, the user adjusts parameters to custom standards of acceptability. A solution under the form of a Grasshopper definition delivers building envelope 3D contours in various file formats as a means for increasing interoperability. The main contributions of this work consist of a parametric reconstruction workflow capable of solving building topology for retrieving 3D contours, a strategy to bypass point cloud occlusion, and a strategy for converting those contours into an IFC model directly from the parametric modelling environment.
Frequency Estimation from Compressed Measurements of a Sinusoid in MA Colored Noise
Authors: Alwan Nuha A. S. , Hussain Zahir M.
Published: July 2021

Frequency estimation of a single sinusoid in colored noise has received a considerable amount of attention in the research community. Taking into account the recent emergence and advances in compressive covariance sensing (CCS), the aim of this work is to combine the two disciplines by studying the effects of compressed measurements of a single sinusoid in moving-average (MA) colored noise on its frequency estimation accuracy. CCS techniques can recover the second-order statistics of the original uncompressed signal from the compressed measurements, thereby enabling correlation-based frequency estimation of single tones in colored noise using higher-order lags. Acceptable accuracy is achieved for moderate compression ratios and for a sufficiently large number of available compressed signal samples. It is expected that the proposed method would be advantageous in applications involving resource-limited systems such as wireless sensor networks.
Investigation of June 2020 Giant Saharan Dust Storm Using Remote Sensing Observations and Model Reanalysis
Authors: Asutosh A. , Vinoj V. , Nuncio M.
Published: July 2021

This paper investigates the characteristics and impact of a major Saharan dust storm during June 14th -19th 2020 to atmospheric radiative and thermodynamics properties over the Atlantic Ocean. The event witnessed the highest ever aerosol optical depth (close to 2 during the peak of the storm) for June since 2002. The satellites and high-resolution model reanalysis products well captured the origin, spread and the effects of the dust storm. The Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) profiles, lower angstrom exponent values (~ 0.12) and higher aerosol index value (> 4) tracked the presence of elevated dust. It was found that the dust AOD was as much as 250-300% higher than their climatology resulting in an atmospheric radiative forcing ~200% larger. As a result, elevated warming ( 8-16 %) was observed, followed by a drop in relative humidity(2-4%) in the atmospheric column, as evidenced by both in-situ and satellite measurements. Quantifications such as these for extreme dust events provide significant insights that may help in understanding their climate effects, including improvements to dust simulations using chemistry-climate models
Metabolomics Response to Drought Stress in Morus alba L. variety Yu-711
Authors: Ackah Michael , Shi Yisu , Wu Mengmeng , Wang Lei , Peng Guo , Liangliang Guo , Xin Jin , Shaocong Li , Qiaonan Zhang , Qiu Changyu , Lin Qiang , Zhao Weiguo
Published: July 2021

Mulberry is an economically significant crop for the sericulture industry worldwide. Stresses such as drought exposure have a significant influence on plant survival. Metabolome directly reflects plant physiological status; thus, a way to assess this impact is to perform a global metabolomic analysis. This study investigated the effect of drought stress on mulberry Yu-711 metabolic balance using a liquid chromatography-mass spectrometry (LC-MS) based on an untargeted metabolomic approach. For this objective, Yu-711 leaves were subjected to two weeks of drought stress treatment and control without drought stress. Multivariate and univariate statistical analyses highlighted numerous differentially-accumulated metabolic elements as a function of time and treatment. Drought stress led to a more differentiated metabolites response than the control. We found that the levels of total lipids and galactolipids, and phospholipids (PC, PA, PE) were significantly altered, producing 48% of the total differentially expressed metabolites. Fatty acyls were the most abundant lipids expressed and decreased considerably by 73.6%. Prenol lipids class of lipids increased in drought leaves. Other classes of metabolites, including polyphenols( flavonoids and cinnamic acid), organic acid (amino acids), carbohydrates, benzenoids, and organoheterocyclic, all had a dynamic trend in response to the drought stress. However, their levels under drought stress generally decreased significantly compared to the control. These results provide an overview of the metabolic profile of the mulberry plant through differentially-accumulated compounds and provide a better understanding of global plant metabolic changes in defense mechanisms.
Characterization and Thermal Aging Tests of Cr Based Multilayer for Unconcentrated Solar Thermal Applications
Authors: Caldarelli Antonio , D'Alessandro Carmine , De Maio Davide , De Luca Daniela , Gaudino Eliana , Musto Marilena , Di Gennaro Emiliano , Russo Roberto
Published: July 2021

Optical characterization and thermal aging tests are performed on a sputter-deposited coating, consisting of SiO2/Cr2O3/Cr/Cr2O3 layers, designed and developed as a selective solar absorber to be used for unconcentrated solar thermal applications. Both measurements are performed by using a home-made apparatus, which mimics a flat plate collector under high vacuum. A Performance Criterion (PCη(T)), based on absorber efficiency is proposed, and a forecast of service lifetime is obtained. As a result of the thermal aging tests, the selective solar absorber under study appears to be highly efficient at mid temperatures (up to 573 K) and thermally stable at temperatures (up to 690 K).
Qishashun-Nabiyyīn Lil-Athfāl (2017) and Kalam-Qu: Stories in The Qur'an (2018) in Intertextual Relationships
Authors: Farhah Eva
Published: July 2021

Research on works that adopt the stories contained in the Al-Qur'an, needs to be examined to find out the originality of the story or the creativity of the authors that are contained in the works. Among the works that adopt the text of the Qur'an are the work entitled Qishashun-Nabiyyīn lil-Athfāl by Abi Al-Hasan Ali al-Hasan an-Nadwiy (2017) and the work Kalam-Qu: The stories in Al- The Qur'an by Jamal Qasim (2018). Both of these works are intended for children. This is the reason these two works are studied. The problem in this study is how the intertextual relationship between the two texts. Intertextual theory is used to study these problems. Thus, the aim of this study is to find and describe the intertextual relationship between the two works. The results of the research show that the transformation text follows the hypogram text. Apart from that, there are also differences between the stories contained in the two works. This happens because the author's or creator's purpose is to show his expertise in making works that are interesting and interesting to the readers.
The construction and testing of an acoustic energy harvester consisting of a Helmholtz resonator and a loudspeaker
Authors: Setiawan Ikhsan , Sifa Mulaiyinatus
Published: July 2021

Sound energy is all around but not properly utilized despite being a source of electricity. This research was conducted to construct and test an acoustic energy harvester consisting of a Helmholtz resonator and a loudspeaker. The resonator cavity was made of 10 mm-thick cube-shaped acrylic plates with an inner side length of 300 mm while its neck was made of PVC (polyvinyl chloride) pipes with an inner diameter of 55 mm and three length variations at 50 mm, 70 mm, and 90 mm. A 6-inch subwoofer loudspeaker was mounted on the resonator back wall facing the cavity with its terminals connected to a 100-ohm load resistor. The sound waves entering the resonator cavity through the neck were converted into the alternating electric current flowing through the resistor. The test was conducted experimentally by exposing the harvester to sound waves at a maximum sound pressure level (SPL) of 100 dB and frequency variations from 25 Hz to 200 Hz. The root-mean-square (rms) voltages across the resistor were measured to calculate the output rms values for electric power. The results showed seven spectrum peaks which appeared at frequencies of 31 Hz, 37 Hz, 41 Hz, 49 Hz, 58 Hz, 73 Hz, and 82 Hz. Moreover, a shorter neck was also observed to have produced higher output power as indicated by the highest value of 2.75 mW obtained by using a 50 mm-long resonator neck at 37 Hz frequency and 100 dB SPL. These findings showed the acoustic energy harvester used to be effective due to its ability to produce electricity even at low frequencies below 100 Hz.
Identification of surface-basement layer distribution of Wangi-Wangi Island based on HVSR method of microtremor data
Authors: Chahyani Rani , Manan Abdul , Puspitafury Cindy , Kasmawati Kasmawati
Published: July 2021

To find out the distribution of the surface-basement layer of Wangi-Wangi Island, it can be done by calculating the surface layer thickness of each measurement point using microtremor data. The surface layer thickness (h) also indicates the position of the basement to the surface. The microtremor recording data used in this study were 47 data. Furthermore, the data were processed using the HVSR method to obtained the soil predominant frequencies which together with the Vs30 values were used to calculated the h values. The results showed that the thickness of the surface layer or sediment layer of Wangi-Wangi Island was in the range of 5.7339 to 241.2557 meters. Based on its distribution, the areas with a thick surface layer are in the areas of Sombu, North Wandoka, Wandoka, South Wandoka, Pada Raya Makmur and Wanci. In the case of a disaster, these areas are thought to have the most potential to experience damage if an earthquake shakes.
Human Resource Planning Study in Hot Strip Mill 2 (HSM#2) factory at PT. Krakatau Steel, Tbk
Authors: Dibyantoro  , Pramono Abdul Chatim , Rahmatullah Asep , Pancasasti Ranthy
Published: July 2021

The purpose of this study was to analyze the human resource planning process at the Hot Strip Mill 2 (HSM#2) factory at PT. Krakatau Steel, Tbk from before it was established until the first commercial operation (first coil). The existence of human resource planning is very important forfactory new, so that human resources will be obtained in quantity and quality in accordance with the needs to support effectiveness and efficiency in order to achieve the vision and mission set by the company. HSM#2 factory isproduction work unitPT. Krakatau Steel, Tbk which started operating for the first time (first coil) on May 17, 2021. The research method is qualitative descriptive using a phenomenological approach that will reveal the experiences of leaders and the human resource planning department related to the HSM#2 factory. The number of informants is7 people consisting of2 persons the manager who makes the mapping of human resource needs, and5 staff person directly involved in human resource planning at the HSM#2 plant. Data were collected beforehand by using interview techniques, document studies, and field observations. Data were analyzed using SWOT matrix analysis by considering strengths, weaknesses, opportunities, and threats. The results of the study indicate that at the time of planning human resources, the procurement of employees is divided into two, namely those from internal for supervisory, superintendent, and manager positions and those frommix of internal and external for officer, foreman, and supervisor positions.
Design, characterisation, and digital linearisation of an ADC analogue front-end for gamma spectroscopy measurements
Authors: Kowalski Tomasz , Gibiino Gian Piero , Szewinski Jaroslaw , Barmuta Pawel , Bartoszek Piotr , Traverso Pier Andrea
Published: July 2021

This work presents the design, experimental characterisation, and digital post-distortion (i.e., digital linearisation) of a MHz-range ADC analogue front-end prototype for a gamma radiation spectrometry system under development at the National Center for Nuclear Research (NCBJ) in Poland. The design accounts for the electrical response of the gamma particle detector in providing signal conditioning and ADC protection against high-voltage spikes due to occasional high-energy cosmic radiation, as well as proper ADC clocking. As the front-end inevitably introduces nonlinear distortion and dynamic effects, a characterisation is performed to quantify the actual performance in terms of Total Harmonic Distortion (THD) and Effective Number of Bits (ENOB). Thus, a digital linearisation based on both static and memory polynomial models is successfully applied by means of post-distortion processing, guaranteeing a substantial improvement in THD and ENOB, and demonstrating the effectiveness of the hardware/software method for gamma radiation spectrometers.  
Power quality metrics for DC grids with pulsed power loads
Authors: Mariscotti Andrea
Published: July 2021

DC grids can effectively feed pulsed power loads (PPLs), integrating local energy storage to minimize the impact on other connected loads and implementing buffered sub-grids to isolate susceptible loads even more. The identification of regulatory limits for PPL integration and DC grid response and the assessment of PPL impact necessitate suitable Power Quality (PQ) metrics. Existing indexes and limits (e.g. ripple and distortion, voltage fluctuation) are compared to other metrics, derived from control methods and knowledge of the peculiar characteristics of PPL and interaction with DC grids in some examples. The objective is a unified approach for PQ metrics suitable for a wide range of DC grids and in particular to the behavior of PPLs.
Review of models and measurement methods for compliance of electromagnetic emissions of electric machines and drives
Authors: Mariscotti Andrea , Sandrolini Leonardo
Published: July 2021

Electric machines and power drives of various sizes and ratings are fundamental elements in many applications, such as electric appliances, electric propulsion, medical systems, all with specific limits of electromagnetic emissions, different from those of the original EMC product standards. As compliance should be assessed and guaranteed during design and procurement, this work compares the conducted and radiated emission limits and discusses the variability of results for the respective test setups and measurement methods, including the most relevant source of uncertainty.
Buck-based DMPPT emulator: a helpful experimental demonstration unit
Authors: Balato Marco , Liccardo Annalisa , Petrarca Carlo , Bonavolontà Francesco
Published: July 2021

Distributed control strategyrepresents the most promising solution to enhance the lackluster energetic performance of mismatched PhotoVoltaic (PV) systems. Moreover, many factors that contribute to such poor performance are still to be explored. To fully understand the advantages offered by the Distributed Maximum Power Point Tracking (DMPPT) approach, the implementation of a DMPPT emulator is necessary. Based on the above needs, this paper describes the realization and use of a Buck based DMPPT emulator and shows its high flexibility and potential. The realized device is capable to emulate the output current vs. voltage (I-V) characteristics of many commercial PV modules with a dedicated Buck DC/DC converter not only in controlled atmospheric conditions but also with different currents rating of the switching devices. The system implementation is based on a commercial power supply controlled by a low-cost Arduino board. Data acquisition is performed through a low-cost current and voltage sensor by using a multichannel board by National Instruments. Experimental results confirm the validity and potential of the proposed DMPPT emulator.