bluuebunny/crossref_metadata_2025 huggingface dataset:
Properties of Autoclaved Aerated Concrete in Different Curing Conditions: A Review
Authors: K Jayakrishnan , Raj Indu Susan , John Dr. Elson
Published: April 2023

Abstract: Autoclaved aerated concrete (AAC) has many benefits for structures, such as heat insulation, sound insulation, fire resistance, reduced dead weight, and many more. AAC products include blocks, wall panels, floor and roof panels, and lintels. Besides its insulating capability, one of AAC's advantage in construction is its quick and easy installation since the material can be routed, sanded, and cut to size on-site using standard carbon steel band saws, hand saws, and drills. Although AAC has been produced for many years, there are still some points that need to be clarified. One of these points is the effect of humidity intrusion on AAC members in areas with high relative humidity levels, like Mediterranean climates. Therefore, various tests associated with the mechanical and physical properties of AAC concrete should be carried out, particularly Compressive Strength test in order to assess the strength of AAC blocks. The current project intends to analyse the physical and mechanical properties of autoclaved aerated concrete blocks at three different curing conditions using an accelerated curing tank to compare the effects of curing on the properties of AAC
Ritzungen am Stechlin
Authors: Björn Kröger
Published: April 2023

Knapp fünfhundert Buchen rund um den Großen Stechlinsee im Norden Brandenburgs, Deutschland, sind mit Ritzungen versehen. Die ältesten von ihnen stammen aus den 1920er Jahren. Es gibt Ritzungen aus der Nazizeit und viele aus den 1950ern bis 1980ern. Ich wollte wissen, was uns diese Zeichen über die Geschichte des Sees und seine Besucher*innen erzählen.
Rodeo
Authors: Jorge Moreira
Published: April 2023

Rodeo é uma fonte condensada e não serifada, inspirada nos velhos filmes de western. Esta fonte variável apresenta-se em regular e slanted, combinando o seu tom divertido com a sua altura.

Realizado por Jorge Moreira
The role of housing-dominated attributes in housing booms: Evidence from China
Authors: Arestis Philip , Lai Mianshan
Published: April 2023

This paper investigates the dominant attribute of housing in China for the period 2000 to 2017 with national monthly data. By employing VAR methodology and Chow test, the empirical results suggest that there is a statistically significant structural breakpoint in February 2009, and that the housing boom before 2009 was driven by self-occupation consumption demand while the rise in house prices since 2009 is a monetary phenomenon. These are consistent with the institutional backgrounds, when the first period encountered the end of housing as a welfare and rapid urbanization and the second period experienced the expansionary monetary policy introduced at the end of 2008. This implies that housing is gradually evolving from a necessity to a financial item, and policymakers should adopt policies that address the dominant attributes of housing at different periods.
Multi-objective mathematical models to resolve parallel machine scheduling problems with multiple resources
Authors: Kanoun Salma , Jerbi Badreddine , Kamoun Hichem , Kallel Lobna
Published: April 2023

Mathematical programming, and above all, the multi-objective scheduling problems stand as remarkably versatile tools, highly useful for optimizing the health care services. In this context, the present work is designed to put forward two-fold multi-objective mixed integer linear programs, simultaneously integrating the objectives of minimizing the patients? total waiting and flow time, while minimizing the doctors' work-load variations. For this purpose, the three major health-care system intervening actors are simultaneously considered, namely, the patients, doctors and machines. To the best of our knowledge, such an issue does not seem to be actually addressed in the relevant literature. To this end, we opt for implementing an appropriate lexicographic method, whereby, effective solutions enabling to minimize the performance of two-objective functions could be used to solve randomly generated small cases. Mathematical models of our study have been resolved using the CPLEX software. Then, results have been comparatively assessed in terms of both objectives and CPU times. A real laser-treatment case study, involving a set of diabetic retinopathy patients in the ophthalmology department in Habib Bourguiba Hospital in Sfax, Tunisia, helps in illustrating the effective practicality of our advanced approach. To resolve the treated problem, we use three relevant heuristics which have been compared to the first-come first-served rule. We find that the program based on our second formulation with time-limit provided the best solution in terms of total flow time.
Intervju med Alexandra Brankova
Authors: Redaksjonen
Published: April 2023

Hvilke spennende problemstillinger knyttet til Øst-Europa og Eurasia belyses av forskere rundt om i Norden? Hvem er forskerne, hva er de opptatt av og hvorfor? I denne spalten kommer vi med jevne mellomrom til å publisere korte intervjuer med yngre talenter så vel som etablerte akademikere. Første kvinne ut er Alexandra Brankova.
Issues of Assessing the Organization of the Occupational Safety Management System in the Small Enterprises
Authors:   FGBU VNIIPO EMERCOM of Russia, Poroshin A.A. , Kondashov A.A. ,   FGBU VNIIPO EMERCOM of Russia, Bobrinev E.V. ,   FGBU VNIIPO EMERCOM of Russia, Udavtsova E.Yu. ,   FGBU VNIIPO EMERCOM of Russia
Published: April 2023

The mathematical model was developed for assessing the state of the occupational safety management system at the small enterprises. It is assessed depending on various indicators grouped into four groups. Group I included the indicators characterizing availability of the organizational documentation on occupational safety and observance of the labor rights of personnel. Group II indicators are related to the organization of training and briefings on occupational safety. Group III indicators characterize the organization of accounting for injuries, prevention of injury rate and deaths among the personnel. Group IV includes the indicators of personnel death and injury rate. The cases of group deaths and injury rate are considered, a gradation of injuries is carried out according to the severity of the damage caused. The model is based on the provisions of the theory of fuzzy sets. For each indicator that affects the state of the occupational safety system, a membership function is defined. It varies from 0 to 1 and demonstrates which values of the indicator correspond to one or another of its state in the enterprise. When evaluating the efficiency of the occupational safety system, the unequal contribution of each indicator to the final assessment is considered. To obtain it, a hierarchical construction system is used. First, generalized estimates are built for each group of indicators. Within the group, weight factors are determined that characterize the degree of influence of the corresponding indicator on the resulting assessment. The values of the weight factors are found by solving the optimization problem using the method of indefinite Lagrange multipliers. As an example, the calculation of the assessment of the state of the occupational safety management system for a small enterprise is considered. It is shown that in the presence of cases of injury or death of personnel, the assessment of its condition sharply decreases.
A Posteriori Assessment of the Statistical Indicators of Occupational Injuries and Occupational Morbidity of Employees in the Construction Industry
Authors:   Belgorod State Technological University named after V.G. Shukhov, Tomarovshchenko O.N. , Petrova V.A. ,   Belgorod State Technological University named after V.G. Shukhov
Published: April 2023

The current level of injuries and occupational morbidity in the construction industry of the Russian Federation is assessed based on the application of a statistical research method, the essence of which is to provide comparative characteristics of a posteriori quantitative indicators. The ranking of harmful factors of the working environment and the labor process was carried out for reducing the degree of prevalence at the workplaces in construction: severity — chemical factor — biological factor — non-ionizing radiation — vibration (general and local) and tension — aerosols of predominantly fibrogenic action — ionizing radiation — microclimate — noise, air ultrasound, infrasound — light medium. The regularity in distribution of accidents in the studied time interval was revealed, which consists in reducing the frequency coefficient, and the risk of occupational injuries in the construction industry with persistently high rates of fatal injury to employees relative to the largest sectors of economic activity. It is established that the risk of injury for one employee during one year in the construction industry varies from 3.03·10–3 to 1.33·10–3, which is higher than the acceptable risk of 1·10–6. Thus, it is required to develop additional measures to reduce industrial injuries and the severity of the consequences of employee injury. Change in the frequency rate of occupational diseases in the studied time interval is uneven, the maximum was recorded in 2015. A survey was conducted among the employees of construction organizations in the Belgorod region, the problem was identified related to concealing the information about injuries (microtraumas, minor accidents). The implementation of the corrective and preventive measures presented in the work will allow to reduce the likelihood of identified hazards, the level of industrial injuries and occupational morbidity.
Does Leader-Member Exchange and Organizational Commitment Affects Turnover Intention of Employees? A New Perspective in The Banking Sector
Authors: Neway Dereje Melaku , Singh Manjit
Published: April 2023

The success of an organization largely depends on how well the leadership process is executed. Now a days, relationship-based approaches of leadership are tapping the attentions of scholars. The study mainly focused on the effect of leader-member exchange and organizational commitment on employee turnover intention. Methodologically, the study was explanatory research in design. Besides, cross-sectional survey method was employed in an attempt to gather the relevant data at one point in time. A total of 399 respondents were participated in the survey. However, 371 respondents gave relevant information and their response score included in the final data analysis. Exploratory factor analysis via SPSS 23 and confirmatory factor analysis via AMOS 23 was conducted. Structural equation modeling using AMOS 23 was applied to examine the causal relationship between leader-member exchange, organizational commitment and turnover intention. The overall analysis result shows that, leader-member exchange has a positive and significant effect on employee organizational commitment level. In addition, organizational commitment significantly and negatively affects employee turnover intention. Moreover, organizational commitment fully mediates the causal link between leader-member exchange and turnover intention level of bank employees. The study result gives a clue that the level of relationship leaders and followers are reciprocating with each other significantly affects turnover intention of employees in the banking sector. The study result may broaden the understanding of leadership research in the context of the banking sector. Because of the study's use of a cross-sectional survey methodology, only less can be learned about causality. Future studies must be carried out in a manner that involves data collection using several approaches and longitudinal research designs.
The Great Power Politic-Capital-Social Information Synergy towards Successful Local Economic Development
Authors: Sarjiyanto
Published: April 2023

The development concept with Local Economic Development (LED) approach applied by developing countries is considered as a new resolution to reduce poverty, unemployment, and economic gaps while improving the quality of life amid globalization and world hegemony. LED is a socio-economic field of study with a relatively new policy formulation that the planning and implementation process is still developing with various alternative theories and approaches. Hence, this paper provides a conceptual and analytical framework for understanding the great power of 4.0 (Politic-Capital-Social-Information) in LEDs synergy in an applicable and comprehensive manner. This paper analyzes the theory and approach of LED with a focus on conceptualizing the synergy of the great power of 4.0 (Politic-Capital-Social-Information) coming from the governments, communities, businesses, and media that affect LED implementation success in the context of developing countries. LED conceptualization is essential in facilitating researchers, practitioners, and policymakers to elaborate political power, capital power, social power, and information influence in implementing LED programs in developing countries. Unlocking the potential of LEDs by synergizing the power of 4.0 (Politic-Capital-Social-Information) is expected to reduce socio-economic gaps and realize equal development for all people, given the condition that the LED strategy has been formulated and implemented effectively.
Mapping and Assessment of Cashew Plantation in Nassarawa State, Nigeria Using Geo Spatial Technology
Authors: Babamaaji Rakiya A. , Shaba Halilu A. , Idris Jega M. , Yusuf Momoh J. , Musa Shagari S. , Munsir Aminu , Jantiku Jagila , Eshiet Rejoice C. I. , Grace Mbaiorga S. , Olajumoke Akinola , Chiemeka Nsofor , Adedayo Oje , Stephen Modie C. , Ibrahim Hamzat , Abdulai Hawa , Maryam Haruna , Tali Damashi M.
Published: April 2023

The world demand for cashew and its by-products leads to increase expansion of the cultivation across West-African countries especially in Nigeria. It has generated wealth for many smallholders and contributed to cashew economy success. This study aimed at mapping existing cashew plantations for better management of rural farmland and assessing the soil suitability to future cashew expansion in the study area. GIS and multi-criteria analysis were used to analyze the natural vegetation and soil suitability for future cashew expansion in Nasarawa state. Data collection was done through structured questionnaire administered to cashew farmers in the study area, GPS coordinates and soil samples were collected for suitability test. Results showed that despite a very suitable soil for plantation cashew, its expansion is slow with implication in conservation and carbon emissions. This implies that there is need for a sustainable management of cashew agriculture practices to ensure optimum production for farmers and stakeholders in cashew value chain should address relevant factors affecting low yield via a holistic government intervention program.
Sustainable Livestock Production: A Systematic Review of Different Constraints Associated with Sustainable Livestock Production
Authors: Kennady Vijayalakshmy , Chakraborty Sharmistha , Biswal Jyotsnarani , Rahman Habibar
Published: April 2023

Agriculture in general and ranches contribute significantly to the sustainability of poor and marginalized farmers. To meet the future requirements of an increasing population, animal productivity must be significantly increased. Animal production is increasingly influenced by a variety of external factors. This includes increasing demand for animal products and an inadequate supply of feed ingredients due to competition in natural resources and trade barriers. At the same time, there is growing concern about livestock and its health consequences. Optimization of the productivity and effectiveness within such restrictions, as well as profit maximization for all stakeholders, are important goals. Several indicators show that animal production optimization is still potentially possible. New science and technologies seem to offer many opportunities for innovation in animal production. Animal productivity improvement has significant mitigation effects in both developed and developing countries. However, the extent of its impact also depends on factors such as the genetic potential of the animal and the introduction of management techniques. Acceptance by consumers and society is an important success factor. In summary, sustainable livestock is very important in livestock. This overview focuses on various issues and restrictions associated with sustainable livestock production.
Parental influence and achievement motivation
Authors:   University of Lagos, Nigeria. E-mail: sopekansarah@yahoo.co.uk, Sopekan Oludola Sarah , Folarin Modupe Ige ,   University of Lagos, Nigeria
Published: April 2023

"Parents are the close social agents of the children. The impact of parental influence and achievement motivation as determinants of upper primary school pupils’ achievement in Lagos metropolis. To achieve the objectives of this study, four research questions were formulated while the descriptive survey research design was adopted. The study was carried out in one primary school each of six Lagos State Education District. The population size comprised of all primary six pupils in public primary schools and the sample size was 300. The data were presented and analyzed using frequency, percentage, charts, tables and mean. The relationships between the study’s variables were tested using the Regression Analysis of Statistical Packages for Social Sciences (SPSS). The study revealed that pupils who are motivated and encouraged performed excellently in their academic and also developed high self-esteem towards learning. It was therefore recommended that parents as social agents to the pupils should create time to understand their children’s abilities towards learning and should not to ridicule them when they do not perform to their expectations. Also, the teachers should adopt the best teaching techniques as the pupils develop different habits. Keywords: Parents, Children, Influence, Motivation, Determinants, Achievement"
HORTUS CONCLUSUS. LA “SACRA FAMIGLIA” LAURETANA DI LORENZO LOTTO
Authors: ANGELUCCI Giulio
Published: April 2023

Hortus conclusus. The Holy Family of Loreto by Lorenzo Lotto. The contribution is an excerpt from Dalla parte di Lorenzo Lotto. Il ciclo lauretano (On the Side of Lorenzo Lotto: The Loreto Cycle), an essay to be completed soon on the pictorial cycle which Lorenzo Lotto (Venice, 1480-Loreto, 1556) ordered in 1555 in the chapter chapel of the church of Santa Maria di Loreto. This is the painter’s last work for a public destination; due to the difficulties in providing a unitary and coherent interpretation, the cycle risks being expunged from Lotto’s catalogue despite the indication made both by Giorgio Vasari in the 1568 edition of the Vite (Lives) and by Carlo Ridolfi in 1648 in Le Meraviglie dell’arte: ovvero Le vite degl’illustri pittori veneti (The Wonders of Art: The Lives of the Illustrious Venetian Painters). Of the seven works making up the cycle, the Holy Family is one of the five painted before 1550, some of which had to be adapted to harmonize their format. The painter intervened on the Holy Family in order to adapt the content of the painting, originally intended for domestic devotion, and make it suitable for the new destination.
REZUMAT. Hortus conclusus. Sfânta Familie din Loreto de Lorenzo Lotto. Contri­buția este un extras din lucrarea Dalla parte de Lorenzo Lotto. Ciclul din Loreto, este o lucrare în curs de definitivare asupra ciclului pictural pe care în anul 1555 Lorenzo Lotto (Venezia, 1480-Loreto, 1556) l-a comandat în capela capitulară a bisericii Sfânta Maria din Loreto. Este în fapt aceasta, ultima operă a pictorului destinată publicului; din cauza greutăților întâmpinate în a oferi o interpretare unitară, riscă să fie suprimată din catalogul lui Lotto în ciuda semnalării făcute atât de Giorgio Vasari în ediția din 1568 a Vieților, cât și de Carlo Ridolfi în 1648, în Minunile artei: sau viața ilustrilor pictori venețieni. Din cele șapte pânze care constituie ciclul, Sfânta Familie este una din cele cinci care sunt pictate înainte de 1550, una dintre acelea care au trebuit adaptate pentru a armoniza adapta noii destinații.
Cuvinte cheie: Lorenzo Lotto, Santa Maria din Loreto, Giorgio Vasari, Sfânta Familie
ADAPTIVE FACEBOOK COMMUNICATION OF ORTHODOX ENTITIES IN COVID-19 CONTEXT
Authors: BORZA Horațiu Vasile , CĂZAN Ionuț Călin , COSMA Smaranda Adina
Published: April 2023

A generalized migration of the consumers to digital channels was observed during the COVID-19 pandemic situation. In this context, the purpose of the research was to analyze the online options the consumer of religious services had and the way Church adapted its communication at the new circumstances. Questions regarding the intensity of communication, posts’ type or frequency, and reactions were investigated through a longitudinal retrospective study focused on Facebook platform. More than 6,150 posts and 1.6 million reactions were included. Distinctive profiles were observed: monasteries vs. urban parishes vs. rural ones. The study suggests that the pattern of consumers’ reactions was influenced by the type of the posts. The impact that online messages have, advocates for a professional approach or support in communication. The results may serve as informational input for a future unitary communication strategy of religious entities.
Article history: Received January 13, 2023; Reviewed January 31, 2023; Accepted February 10, 2023; Available online March 30, 2023; Available print April 30, 2023.
 JEL Classification: M31, Z12, O33
THE ROLE OF SELF-ESTEEM IN THE BUYING DECISION PROCESS. A THEORETICAL APPROACH
Authors: BEJAN Brîndușa Mariana
Published: April 2023

Within the consumer behaviour literature, there are few studies in the consumer behaviour literature dealing with the relationship between consumer self-esteem and its role in the buying decision process. This paper explores the influence of self-esteem throughout the five stages of the consumer buying decision process. The first aspect for consideration is getting a clear picture of the definition and dimensions of self-esteem. The second element of the study concerns the five stages of the decision-making process, with special focus on how the process takes place depending on the level of self-esteem. The results show that impulse purchasers have more often than not a low level of self-esteem and do not go through the stages of the decision-making process in the usual way. With respect to managerial implications, the study indicates that organizations have to pay more attention to customer self-esteem when making customer segmentation, as, at the moment, the focus is only on demographic differences (age, gender, background, education) which do not always provide sufficient information. The evidence shows that self-esteem plays an increasing role in explaining consumer behaviour and sheds light on how individuals make decisions which mould their existence.
 Article history: Received January 31, 2023; Reviewed February 27, 2023; Accepted March 10, 2023; Available online March 30, 2023; Available print April 30, 2023.
 JEL Classification: M30, M31
The Influence of Protein and Elastomer Waste Mixture on the NBR-Based Elastomer Compound
Authors: Niţuică Mihaela , Sönmez Maria , Stelescu Maria Daniela , Alexandrescu Laurenţia , Georgescu Mihai , Gurău Dana , Badea Elena , Rusu Bogdan Florin , Dumitru Andrei
Published: April 2023

The paper presents the influence of a mixture of elastomeric and protein waste from the footwear industry on the properties of elastomeric compounds based on NBR (butadiene-co-acrylonitrile) rubber, as well as their obtaining and characterization. The mixture of leather and rubber waste was cryogenically ground, in three grinding cycles, and the selected size was 0.35 mm, and the rotation speed of 14,000 rpm. After grinding, the leather and rubber waste mixture was functionalized with potassium oleate at a temperature of 60°C. The polymer compounds based on butadiene-co-acrylonitrile rubber (NBR) and the mixture of protein and elastomeric waste (in the ratio of 15, 20, 40, 50%) from the footwear industry were processed by mixing on an internal Brabender mixer, tested from a rheological, physical and mechanical point of view (hardness, elasticity and tensile strength) after conditioning for 24 h at room temperature according to the standards in force, but also by FT-IR spectroscopy performed with a double beam IR molecular absorption spectrometer, in the range 4000-400 cm-1, using the FT-IR Thermo Nicolet iS 50, equipped with ATR with diamond crystal. Following characterisation, it can be said that they present optimal values that fall within the standards for the footwear industry.
Urban Environmental Acupuncture for Improving the Sustainability of Dense City Areas – Polish Experiences from the SALUTE4CE Project
Authors: Stangel Michał
Published: April 2023

The idea of urban environmental acupuncture postulates, that in areas with no space available for green spaces, sustainability and climate resistance can be improved by small green spots in key locations. The project SALUTE4CE established pilot environmental acupuncture strategies in Central-European cities. The author was responsible for elaborating an Action Plan for the functional area of Chorzów, Ruda Śląska and Świętochłowice, Poland. The project aimed at finding spots with potential outcomes in terms of sustainability, reducing urban heat islands and improving comfort and quality of spaces, with nature based solutions: from planting climate resistant vegetation and restoring biodiversity, through improving local retention, to green roofs or vertical walls. The concept assumes, that acting in many small places can bring synergic effects and contribute to urban regeneration. Four pilot spots have been constructed so far, and other interventions shall be realized in the coming years. So far the project results have been disseminated in project documents and reports. This paper aims at a summary of project experiences and perspectives in regard to participating Polish cities.
Dynamic Replacement: The Influence of Pounder Diameter and Ground Conditions on Shape and Diameter of the Columns
Authors: Kwiecień Sławomir , Kowalska Magdalena
Published: April 2023

Dynamic replacement (DR) is a ground improvement technique that has been used now for almost 50 years. During the formation of a DR column a crater is created which is then filled with a coarse material and compacted again. The length, diameter and shape of such a column cannot be observed directly, which makes the design and execution more troublesome. In the article presented are the dimensions and shapes of 18 columns from eight different test fields. They were formed by means of pounders of various masses (9 or 11.5 Mg) and dimensions (1.00 or 1.05 m in diameter, 1.8 or 2.0 m in height). Based on the observations and measurements, it was concluded that the shape and diameter of a DR column is influenced by the parameters of the soft soil that is supposed to be improved (its thickness, physical state and location in the profile), as well as by the diameter of the pounder. It was revealed that, as the length of the columns increased, the column shapes changed from: a cylinder, through a truncated cone, a barrel to an asymmetric barrel. The diameters of all of the columns were 1.4–2.8 times larger than the diameters of the used pounders and the largest values were noted along the depth of the weakest layer. The presented results may be useful to the profession. When the thickness of the weak soil, its type and state are known and the technological parameters are similar to the ones presented in this paper, it is possible to predict the shape and diameter of the columns depending on the diameter of the pounder.
Verification of the Weather Research and Forecasting Model (WRF) for the Domain of Silesian Voivodeship and Upper Silesia Metropolitan Region
Authors: Bronder Joachim , Fudała Janina
Published: April 2023

The paper presents the analysis of the statistical errors of the meteorological parameters predicted by the WRF (Weather Research and Forecasting) model. The model is used for forecasting air pollution in the Silesian Voivodeship with an accuracy of about 70-80%. Thus, the main idea of the research was assessing to what extent the error in the forecast of meteorological parameters affects the error of the air quality forecast, which can be evaluated using the system InfoSMOG – MED for the inhabitants of the Silesian Voivodeship at www.slaskiesmogstop. It was also investigated how the reduction of the mesh size of the forecast of meteorological parameters affects the error of the forecast of these parameters, which was necessary for the next project SMART. The research was carried out for 3 computational domains: Poland, Silesian Voivodeship and Upper Silesia Metropolitan Region, each with a different grid resolution. The predicted temperature and wind speed data were compared with the measured data from the Polish synoptic stations and the stations of the METAR airports meteorological shield located in the respective domains. In addition, the error of the predicted parameters was investigated in the grid where the climatological station is located in the Śląskie Planetarium in Chorzów.
Numerical Analysis of the Impact of the Use of Personal Protective Equipment on the Face in the Process of Pollutants Spreading Emitted During Breathing
Authors: Bulińska Anna , Kocik Stanisław , Buliński Zbigniew
Published: April 2023

The study presents the results of a numerical analysis of the effectiveness of the use of personal protective equipment of various designs on the spread of pollutants marked with CO2 emitted during human breathing. In the study of 3D geometry the upper part of the human torso and head was developed. The simulated person was supplied with different personal protective equipment covering the human face (PPE). Two types of face shields worn at a different distance from the face and one fabric face mask was analysed. The reference geometry with no personal protective equipment was also analysed. Transient calculation with full breathing model including breath-in and breath-out and species transport were simulated. The results showed that different PPE generates different airflow patterns in the vicinity of the human face. The most efficient in reducing infection risk is by wearing a face mask or face shields at a small distance from the face, as they most effectively reduce CO2 concentration in the surrounding air. However, they also increase the re-inhalation risk of high CO2 concentration which affects human well-being.
Investigation of Sorghum (Sorghum bicolor L.) Variety Preferences of Farmers in the Potential Low Land Areas of North Shewa Zone, Amhara Region
Authors: Kassa Yehuala , Managido Demis , Legesse Abiy , Ayele Teklemariam
Published: April 2023

Sorghum is one of the major staple crops grown in the poorest and most food-insecure regions of Ethiopia. Sorghum production is predominantly based on local seeds with limited use of commercial fertilizer or other chemicals. This study is therefore aimed to demonstrate the improved sorghum variety with its improved management practices and to assess farmers’ and extension workers’ reactions. The newly released variety of Beletew was evaluated with the variety of Melkam. The experiments were implemented using a simple plot design with farmers’ fields as a replicate. The result revealed that in both locations, the studied varieties showed nonsignificant variation in grain yield. Besides, all the participant farmers were agreed that the variety Beletew had compacted panicle, a larger number of spikes per panicle, stayed green character and yellow seed color. Similarly, about 78.3% and 65.6% of the participant farmers from Efratana gidim and Ensaro Districts respectively agreed that the variety Beletew had a larger panicle size than the variety Melkam and expected higher grain yields from it. Therefore based on the grain yield performance of the result of farmers’ evaluation, the new variety of Beletew was recommended to be pre-scale on a wider scale to sorghum-growing lowland areas as an alternative shortmatured varieties.
Effects of Covid-19 Pandemic on Food Consumption Habits of Consumers (Example of the central district of Tokat province)
Authors: Kaplan Esra , Kaplan Kaan , Gözener Bilge
Published: April 2023

Taking long-term threats on food supply and safety, effects of Covid-19 pandemic on nutritional habits of consumers were investigated in this study. Consumers living in Yeşilyurt district of Tokat province in 2021 constituted the primary material of the present study. Simple random sampling method was used in selection of the sample size and 162 people participated into face-to-face interviews. Changes in food consumption habits of consumers before and after the pandemic were investigated. Present findings revealed an increase in monthly food expenditures of consumers during the pandemic period. About 45% of the participating consumers stated that their nutrition levels were affected during the pandemic period. The variables that had the highest positive correlation with the nutritional effects after Covid-19 pandemic were identified as consumption of dietary supplements (vitamins, etc.) and medicinal-aromatic plants after the pandemic. Path analysis was applied to survey findings and the variables with the greatest direct effects on nutritional level of the consumers after Covid-19 pandemic were identified as change in winter preparations (88.88%), monthly fruit consumption (84.59%) and monthly meat consumption (83.44%).
Study on the effect of rural seniors’ labor force participation on health and health investment
Authors:   The Korean Agricultural Economics Association, Kim Namhoon
Published: April 2023

The purpose of this study is to theoretically and empirically analyze the effect of labor force participation of rural seniors on their health and health investment. The study suggests the health investment model of old people based on the Grossman model and investigates the correlation between their labor force and health variables by using the Korean Longitudinal Study of Ageing (KLoSA) and panel data analysis model. The empirical results show that health improves when the elderly live in rural areas or participate in the labor force. However, if the seniors living in rural areas participate in the labor force, the health improvement effect was offset. Further, if the rural seniors work, they are more likely to use medical services, but less likely to attend health activity programs than those who do not work. The lack of leisure time for working rural seniors can reduce the size of health investment and worsen the health gap between rural and urban elderly. The policy authorities need to make an effort to ensure health investment opportunities for the elderly in rural areas.
Reflexiones sobre la masculinidad con los estudiantes de Trabajo Social: una apuesta ético política desde la intervención e investigación social en Manizales, Colombia
Authors: Saldarriaga-Tabares Juliana
Published: April 2023

Este artículo es producto del proceso de intervención e investigación social denominado “Resignificando los sentidos de ser hombre en Trabajo Social” realizado en el año 2021-II y 2022-I en el programa de Trabajo Social de la Universidad de Caldas, en el cual se hizo una apuesta por visibilizar las masculinidades en una carrera históricamente feminizada y reconocer sus luchas, sus malestares y sus privilegios en este escenario académico. El propósito es motivar la reflexión sobre lo que implica ser hombres en Trabajo Social desde sus propias narrativas y entender cómo construyen su masculinidad y cómo la resignifican a partir del cuestionamiento a las dinámicas que se presentan en las aulas de clase, la problematización de sus formas de socialización y de crianza, así como el reconocimiento de las emociones y el cuidado de sí como parte fundamental de su subjetividad. Será la posibilidad de construir nuevas formas de ser hombres desde el escenario educativo, unas masculinidades enmarcadas en el buen trato, el cuidado y el respeto consigo mismos y con las demás personas.
Development and In-Orbit Operation of Deep Learning Attitude Sensor
Authors: Kikuya Yuhei , Ohta Kei , Iwasaki Yohei , Ozawa Toshiki , Watanabe Kei , Yatsu Yoichi , Matunaga Saburo
Published: April 2023

This study presents in-orbit demonstrations of a deep learning attitude sensor (DLAS) aboard the Japan Aerospace Exploration Agency (JAXA) small-satellite, Rapid Innovative Payload Demonstration Satellite 1. The DLAS is a spaceborne component that consists of star trackers, Earth cameras, and onboard computers. We propose a novel attitude determination method that uses a small camera and image recognition algorithm on board the DLAS to achieve three-axis attitude determination with minimal weight and volume. The DLAS mission further includes a demonstration of a low-cost high-performance star tracker that integrates consumer products. The development of the DLAS began in 2016 when it was adopted as the theme of the JAXA Innovative Satellite Technology Demonstration program. It was launched into a sun-synchronous orbit at an altitude of 500 km in January 2019 for approximately one year. This paper describes the results obtained from the DLAS operation and its future applications. The DLAS demonstrated an Earth camera image identification accuracy of more than 70%. Moreover, the obtained attitude determination accuracy was approximately 2.8 deg for the Earth camera and approximately 14 arcs for the star trackers. The technologies developed in the DLAS have been implemented in a subsequent microsatellite (HIBARI) of the Tokyo Institute of Technology.
Designing Satellite Constellations to Observe Earth’s Time-Varying Gravity from Clock Frequency Comparisons
Authors: Lee Kwonhee A. , Gunter Brian C.
Published: April 2023

The nondominated sorting genetic algorithm III (NSGA-III) is used to design nonsymmetric satellite constellations to observe large-scale high-frequency gravity variations that would serve as complementary systems to other dedicated gravity field mapping missions such as the Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow-On missions. The functionality of the NSGA-III method is validated by reproducing optimal surface-coverage satellite constellations from the literature. Then, NSGA-III is used to generate nondominated constellations tuned to detect short-term long-wavelength gravity field variations. The constellations are used to generate subweekly gravity field solutions from clock frequency comparison measurements. The effectiveness of NSGA-III for optimizing nonsymmetric constellations was demonstrated because the constellations obtained from NSGA-III were consistently superior in performance than traditional symmetric constellations. Furthermore, the results showed that the time-varying signals of interest (that is, gravity coefficients through the spherical harmonic degree and order of seven at daily intervals) can be unambiguously resolved by assuming an optical clock with a [Formula: see text] fractional frequency uncertainty representative of current technology. The ability to monitor these short-term long-wavelength signals on a global scale would observe a spectrum of the gravity field inherently undetectable by GRACE-like missions, and it would provide new insight to the understanding of global mass redistribution processes.
Arcjet Evaluation of Thermocouple Performance in Flexible Thermal Protection System Materials
Authors: Miller Ruth A. , Kazemba Cole D. , Swanson Gregory T. , Williams Joseph D. , Hughes Stephen , Cheatwood Neil
Published: April 2023

The flexible thermal protection system (FTPS) on NASA’s low-Earth-orbit flight test of an inflatable decelerator vehicle was instrumented with thermocouples to measure the in-depth thermal response during entry into Earth’s atmosphere. Accurate flight temperature measurements are critical for verifying vehicle performance during the flight test and reducing uncertainties in the thermal models, but the deployable nature of inflatable decelerator technology presents challenges. The thermocouples need to be compactable, cannot damage the FTPS or the inflatable structure, and need to be able to withstand high temperatures and large thermal gradients. The present paper details the arcjet testing that was performed to examine the potential error sources associated with instrumenting NASA’s FTPS with different thermocouple Types (Type K versus Type N), wire gauges (30 versus 28 American wire gauge), insulations (glass versus ceramic), and barriers (mica versus no mica). Several error sources were identified, including 1) conductive deposits on the thermocouple insulation electrically shorting the thermocouple leads; 2) melting of the glass thermocouple insulation, allowing for electrical shorting of the thermocouple leads; 3) thermocouple leads melting, resulting in loss of signal; and 4) oxidation of the positive thermocouple lead (known as green rot), generating a drift in the measured output. A mica tape wrap around each individual thermocouple lead was successfully used to mitigate the first error source, and switching to ceramic insulation eliminated the second error source. The third and fourth error sources were examined by exploring the effect of the thermocouple type and wire gauge. Thermocouple solutions that minimize the potential error sources at each layer in the FTPS are presented. Finally, the arcjet test results are compared to the previously reported ground-based tube furnace test results, and their applicability to the flight environment is discussed.
Dynamic Response of Circulation Control for Step and Sinusoidal Inputs
Authors: Li Shaoze , Shires Andrew
Published: April 2023

A numerical study of the dynamic performance of a circulation controlled (CC) airfoil is performed to explore the feasibility of using circulation control as means of gust suppression. Steady and unsteady two-dimensional computational fluid dynamics (CFD) simulations were initially validated using published data. The dynamic performance of a CC airfoil was subsequently assessed. The response of the CC airfoil to step and sinusoidal inputs were obtained from unsteady CFD simulations. It was found that the actuation speed of circulation control is significantly faster than a conventional mechanical flap at the same flight condition. Additionally, the lift response to a step input was found to be very similar to the Küssner function.
Exploiting Active Subspaces for Geometric Optimization of Cavity-Stabilized Supersonic Flames
Authors: Wei Jieli , An Jian , Zhang Qi , Zhou Hua , Ren Zhuyin
Published: April 2023

With the increased demand for hydrogen for carbon-neutral propulsion technologies, understanding the coupling effect of the fuel injection and cavity on flow characteristics is essential and an open issue for cavity-based hydrogen supersonic flame stabilization and optimizations. In this paper, the active subspace (AS) method is exploited to quantitatively reveal the intrinsic connections between the flow and flame stabilization with various fuel injection and cavity geometric parameters. A flame stabilization metric [Formula: see text] connecting the flame stabilization mode with nonreacting flows is proposed for the AS analysis and multiobjective optimizations. The results show that there exist one-dimensional active subspaces for key performance metrics, for example, the total pressure loss [Formula: see text], residence time [Formula: see text], and [Formula: see text]. The fuel injection pressure, cavity length-to-depth ratio, and cavity depth are three leading factors that govern the total pressure loss while the cavity residence time is dominated by the cavity depth. The proposed [Formula: see text] reasonably maps the flame stabilization mode with nonreacting flows. Using the response lines obtained by the AS, the tradeoff between [Formula: see text] and [Formula: see text] is quantitatively formulated with a clear visualization of candidate sets in the input space, demonstrating the advantages of the AS method for the combustor designs involving multiple objectives.
Multifidelity Approach to Sensitivity Estimation in Large-Eddy Simulation
Authors: Arias-Ramírez Walter , Oberoi Nikhil , Larsson Johan
Published: April 2023

A novel approach to compute affordable approximate sensitivities in a large-eddy simulation (LES) is proposed and assessed. The approach is based on solving a Reynolds-averaged Navier–Stokes (RANS) problem that has been linearized around the mean LES solution, with closure modeling required for the linearized changes in turbulent Reynolds stresses. In the present study, the closure modeling is based on a linearized algebraic turbulence model. The method is assessed for the flow over a NACA0012 airfoil at a fixed angle of attack, with the Reynolds number as the variable parameter. The results show that, provided an accurate linearized closure model, the method predicts the correct sensitivity of the skin friction coefficient and the mean velocity field at the cost of a linearized RANS, which provides an important proof-of-concept for this approach. The linearized algebraic turbulence model with standard model coefficients produces a reasonably accurate sensitivity, but the results also suggest that accuracy could be gained from recalibrating the model coefficients for this new use of the model.
Relação entre COVID-19 e ansiedade e depressão no período gestacional
Authors: Carvalho Gabriela Duarte , Fiusa Isabella Luciana Silva , Carvalho Arlessandro Pinto de Souza , Oliveira Virgínia Junqueira
Published: April 2023

Objetivo: Compreender como a COVID-19 se relaciona com a depressão e ansiedade na gestação e como as experiências vivenciadas e presentes durante a pandemia impactam nessas doenças. Métodos: Revisão integrativa da literatura nas bases de dados Biblioteca Virtual em Saúde (BVS) e PubMed. Foram utilizados os descritores “ansiedade”, “depressão”, “gestação” e “COVID-19”. A partir dos critérios de inclusão e exclusão, foram incluídas 17 publicações para análise. Resultados: Emergiram quatro categorias relacionadas ao aumento da ansiedade e depressão na gestação durante a pandemia da COVID-19, sendo elas: I) Medo de contágio, preocupação com o bem-estar fetal e com o acesso aos serviços de saúde; II) Mudança na rotina e hábitos e suporte social, III) Repercussões financeiras e profissionais, e IV) Discurso das mídias sociais e meios de comunicação em massa. Considerações finais: Foi possível observar que a pandemia da COVID-19 apresentou relação significativa com os níveis de ansiedade e depressão e trouxe consequências negativas que impactaram na vida das gestantes.
Contribuição do enfermeiro no manejo da sepse na terapia intensiva
Authors: Santos Geysa Rayane Martins , Sousa Layane Cristine da Silva , Muniz Marcela Vilarim , Santos Rachel Iglesias Teodoro dos , Ribeiro Kaiomakx Renato Assunção , Silva Cristiane Barbosa da , Almeida Daniella Valença Daher de
Published: April 2023

Objetivo: Sintetizar o que diz a literatura sobre a atuação do enfermeiro no manejo da sepse no âmbito da terapia intensiva. Métodos: Trata-se de uma revisão integrativa, exploratória e com abordagem qualitativa, com artigos publicados de 2012 a 2022, nos idiomas português, inglês ou espanhol. A busca foi realizada em setembro de 2022, as bases de dados consultadas foram a Literatura Latino Americana em Ciências da Saúde (LILACS), Sistema Online de Busca e Análise de Literatura Médica (MEDLINE) e Banco de Dados em Enfermagem (BDENF). Foram utilizados os descritores em saúde: Sepse, Unidades de Terapia Intensiva, Enfermeiras e Enfermeiros, nos idiomas português, inglês e espanhol, combinando os operadores booleanos “AND” e “OR”. Resultados: 7 publicações foram incluídas no estudo. Foi possível averiguar o conhecimento dos enfermeiros a respeito da sepse, do protocolo clínico preconizado e a respeito dos sinais clínicos e condutas frente ao paciente séptico. Considerações finais: Considera-se que o conhecimento dos enfermeiros sobre a temática ainda é deficiente, havendo necessidade de maior investimento na capacitação teórico-prática destes profissionais e que abordagens direcionadas a sistematização da atuação do enfermeiro dentro do protocolo de sepse possam gerar maior sucesso na terapêutica proposta.