bluuebunny/crossref_metadata_2025 huggingface dataset:
Political Instability Equals the Collapse of Tourism in Ukraine?
Authors: Tomczewska-Popowycz Natalia , Quirini-Popławski Łukasz
Published: April 2021

The purpose of this study was to determine how political instability influences inbound tourist flows in Ukrainian cities, performance of tourism-related businesses, and tourism-based profits in general. This study allows us to present the impact of various events on the tourism economy in Ukraine; however, the available secondary data with the unobserved component model procedure detection give only a general overview of the situation. Thus, interviews were conducted with experts, including managers of accommodation facilities, employees of municipal tourism development departments, and researchers investigating tourism. Interviews with experts revealed opportunities, threats, and future scenarios of tourism in Ukraine in the face of five years of political instability. The results support previous findings that political instability reduces tourist traffic over the short term. On the other hand, the interviews with experts representing major province cities have shown different results for the long-term perspective. Cities with developed tourism sectors in areas away from the place of conflict are beneficiaries of political instability. Disadvantaged are cities that had their tourist flows based on the citizens of the aggressor’s country—the Russian Federation. Cities that are underdeveloped in terms of tourism did not experience a significant impact of the political instability in eastern Ukraine.
Fragmentation of International Production and Business Cycle Synchronization: New Evidence pre and during Global Financial Crises
Authors: Khidil Norrana , Zaidi Mohd Azlan Shah , Abdul Karim Zulkefly
Published: April 2021

Understanding the link between the fragmentation of international production (FIP) and business cycle synchronization (BCS) is crucial because it affects the world economic stability and hence hampers the sustainability in world trade, world production, and the world supply chain. Following that, this paper investigates the effects of fragmentation in an international production (FIP) on business cycle synchronization (BCS) amongst 38 countries (29 OECD and nine non-OECD countries) for two different periods; pre-crisis (2003–2007) and during the crisis period (2008–2012). This study uses a dynamic panel system GMM estimation in analyzing the effect of FIP on BSC by controlling other explanatory variables, namely, trade linkages and financial openness. Unlike many previous results, the main findings reveal that FIP positively and significantly affects BCS during a crisis period. However, it shows an insignificant effect during the normal period. In other words, FIP would amplify the synchronization of output downfall during the crisis period. Trade linkages have a negative and significant relationship with BCS in both periods, whereas financial openness has a negative and significant relationship with BCS during the normal period. The study suggests that selective measures have to be undertaken in implementing FIP during the crisis period to reduce the negative impact of BCS. Increasing trade and financial activities, on the other hand, would be beneficial for the countries as they would reduce the negative effect of BCS during the crisis period.
Land Price Forecasting Research by Macro and Micro Factors and Real Estate Market Utilization Plan Research by Landscape Factors: Big Data Analysis Approach
Authors: Lee Sang-Hyang , Kim Jae-Hwan , Huh Jun-Ho
Published: April 2021

In real estate, there are various variables for the forecasting of future land prices, in addition to the macro and micro perspectives used in the current research. Examples of such variables are the economic growth rate, unemployment rate, regional development and important locations, and transportation. Therefore, in this paper, data on real estate and national price fluctuation rates were used to predict the ways in which future land prices will fluctuate, and macro and micro perspective variables were actively utilized in order to conduct land analysis based on Big Data analysis. We sought to understand what kinds of variables directly affect the fluctuation of the land, and to use this for future land price analysis. In addition to the two variables mentioned above, the factor of the landscape was also confirmed to be closely related to the real estate market. Therefore, in order to check the correlation between the landscape and the real estate market, we will examine the factors which change the land price in the landscape district, and then discuss how the landscape and real estate can interact. As a result, re-explaining the previous contents, the future land price is predicted by actively utilizing macro and micro variables in real estate land price prediction. Through this method, we want to increase the accuracy of the real estate market, which is difficult to predict, and we hope that it will be useful in the real estate market in the future.
An Enhanced Intrinsic Time-Scale Decomposition Method Based on Adaptive Lévy Noise and Its Application in Bearing Fault Diagnosis
Authors: Ma Jianpeng , Zhuo Shi , Li Chengwei , Zhan Liwei , Zhang Guangzhu
Published: April 2021

When early failures in rolling bearings occur, we need to be able to extract weak fault characteristic frequencies under the influence of strong noise and then perform fault diagnosis. Therefore, a new method is proposed: complete ensemble intrinsic time-scale decomposition with adaptive Lévy noise (CEITDALN). This method solves the problem of the traditional complete ensemble intrinsic time-scale decomposition with adaptive noise (CEITDAN) method not being able to filter nonwhite noise in measured vibration signal noise. Therefore, in the method proposed in this paper, a noise model in the form of parameter-adjusted noise is used to replace traditional white noise. We used an optimization algorithm to adaptively adjust the model parameters, reducing the impact of nonwhite noise on the feature frequency extraction. The experimental results for the simulation and vibration signals of rolling bearings showed that the CEITDALN method could extract weak fault features more effectively than traditional methods.
Ageritin from Pioppino Mushroom: The Prototype of Ribotoxin-Like Proteins, a Novel Family of Specific Ribonucleases in Edible Mushrooms
Authors: Ragucci Sara , Landi Nicola , Russo Rosita , Valletta Mariangela , Pedone Paolo Vincenzo , Chambery Angela , Di Maro Antimo
Published: April 2021

Ageritin is a specific ribonuclease, extracted from the edible mushroom Cyclocybe aegerita (synonym Agrocybe aegerita), which cleaves a single phosphodiester bond located within the universally conserved alpha-sarcin loop (SRL) of 23–28S rRNAs. This cleavage leads to the inhibition of protein biosynthesis, followed by cellular death through apoptosis. The structural and enzymatic properties show that Ageritin is the prototype of a novel specific ribonucleases family named ‘ribotoxin-like proteins’, recently found in fruiting bodies of other edible basidiomycetes mushrooms (e.g., Ostreatin from Pleurotus ostreatus, Edulitins from Boletus edulis, and Gambositin from Calocybe gambosa). Although the putative role of this toxin, present in high amount in fruiting body (>2.5 mg per 100 g) of C. aegerita, is unknown, its antifungal and insecticidal actions strongly support a role in defense mechanisms. Thus, in this review, we focus on structural, biological, antipathogenic, and enzymatic characteristics of this ribotoxin-like protein. We also highlight its biological relevance and potential biotechnological applications in agriculture as a bio-pesticide and in biomedicine as a therapeutic and diagnostic agent.
Measurement of the Casimir Force between 0.2 and 8 μm: Experimental Procedures and Comparison with Theory
Authors: Bimonte Giuseppe , Spreng Benjamin , Maia Neto Paulo A. , Ingold Gert-Ludwig , Klimchitskaya Galina L. , Mostepanenko Vladimir M. , Decca Ricardo S.
Published: April 2021

We present results on the determination of the differential Casimir force between an Au-coated sapphire sphere and the top and bottom of Au-coated deep silicon trenches performed by means of the micromechanical torsional oscillator in the range of separations from 0.2 to 8 μm. The random and systematic errors in the measured force signal are determined at the 95% confidence level and combined into the total experimental error. The role of surface roughness and edge effects is investigated and shown to be negligibly small. The distribution of patch potentials is characterized by Kelvin probe microscopy, yielding an estimate of the typical size of patches, the respective r.m.s. voltage and their impact on the measured force. A comparison between the experimental results and theory is performed with no fitting parameters. For this purpose, the Casimir force in the sphere-plate geometry is computed independently on the basis of first principles of quantum electrodynamics using the scattering theory and the gradient expansion. In doing so, the frequency-dependent dielectric permittivity of Au is found from the optical data extrapolated to zero frequency by means of the plasma and Drude models. It is shown that the measurement results exclude the Drude model extrapolation over the region of separations from 0.2 to 4.8 μm, whereas the alternative extrapolation by means of the plasma model is experimentally consistent over the entire measurement range. A discussion of the obtained results is provided.
Evaluation of Safety and Efficacy of an Inactivated Marker Vaccine against Bovine alphaherpesvirus 1 (BoHV-1) in Water Buffalo (Bubalus bubalis)
Authors: Petrini Stefano , Martucciello Alessandra , Grandoni Francesco , De Matteis Giovanna , Cappelli Giovanna , Giammarioli Monica , Scoccia Eleonora , Grassi Carlo , Righi Cecilia , Fusco Giovanna , Galiero Giorgio , Pela Michela , De Mia Gian , De Carlo Esterina
Published: April 2021

Recent studies have explored the seropositivity of Bovine alphaherpesvirus 1 (BoHV-1) in water buffaloes, suggesting the urgency for developing strategies to eradicate the virus involving both cattle and water buffaloes. However, in Europe, the glycoprotein E (gE) deleted marker vaccines against BoHV-1 are commercially available only for the cattle industry. This study, for the first time, evaluated the safety and efficacy of a commercial inactivated gE-deleted marker vaccine in water buffalo. Five animals devoid of BoHV-1-neutralizing antibodies were vaccinated via intramuscular route. Five additional animals served as an unvaccinated control group. Sixty days after the first immunization, all animals were experimentally infected with a virulent BoHV-1via intranasal route. A detectable BoHV-1-humoral immune response was observed in the vaccinated group on post-vaccination day 30, whereas the antibodies appeared on post-challenge day 10 in the control group. Moreover, the vaccinated animals neither show viral shedding nor clinical signs compared to the control upon challenge. However, post-challenge, the BoHV-1-specific humoral and cell-mediated immune responses were significantly more increased in vaccinated animals than the control animals. Overall, the present study provides evidence of both the safety and efficacy of an inactivated gE-deleted marker vaccine against BoHV-1 in water buffaloes.
Detection and Severity Evaluation of Combined Rail Defects Using Deep Learning
Authors: Sresakoolchai Jessada , Kaewunruen Sakdirat
Published: April 2021

Various techniques have been developed to detect railway defects. One of the popular techniques is machine learning. This unprecedented study applies deep learning, which is a branch of machine learning techniques, to detect and evaluate the severity of rail combined defects. The combined defects in the study are settlement and dipped joint. Features used to detect and evaluate the severity of combined defects are axle box accelerations simulated using a verified rolling stock dynamic behavior simulation called D-Track. A total of 1650 simulations are run to generate numerical data. Deep learning techniques used in the study are deep neural network (DNN), convolutional neural network (CNN), and recurrent neural network (RNN). Simulated data are used in two ways: simplified data and raw data. Simplified data are used to develop the DNN model, while raw data are used to develop the CNN and RNN model. For simplified data, features are extracted from raw data, which are the weight of rolling stock, the speed of rolling stock, and three peak and bottom accelerations from two wheels of rolling stock. In total, there are 14 features used as simplified data for developing the DNN model. For raw data, time-domain accelerations are used directly to develop the CNN and RNN models without processing and data extraction. Hyperparameter tuning is performed to ensure that the performance of each model is optimized. Grid search is used for performing hyperparameter tuning. To detect the combined defects, the study proposes two approaches. The first approach uses one model to detect settlement and dipped joint, and the second approach uses two models to detect settlement and dipped joint separately. The results show that the CNN models of both approaches provide the same accuracy of 99%, so one model is good enough to detect settlement and dipped joint. To evaluate the severity of the combined defects, the study applies classification and regression concepts. Classification is used to evaluate the severity by categorizing defects into light, medium, and severe classes, and regression is used to estimate the size of defects. From the study, the CNN model is suitable for evaluating dipped joint severity with an accuracy of 84% and mean absolute error (MAE) of 1.25 mm, and the RNN model is suitable for evaluating settlement severity with an accuracy of 99% and mean absolute error (MAE) of 1.58 mm.
Optimization Model of the Ecological Water Replenishment Scheme for Boluo Lake National Nature Reserve Based on Interval Two-Stage Stochastic Programming
Authors: Huang Jin , Zhao Lei , Sun Shijun
Published: April 2021

In the present paper, an optimization model of the ecological water replenishment quantity of Boluo Lake wetland was constructed for ecological water replenishment in the Boluo Lake National Nature Reserve based on the interval two-stage stochastic programming (ITSP) method, which scientifically allocates the ecological water resources and enhances the utilization of flood resources in order to meet the minimum ecological water replenishment quantity requirement to meet the local economic and social water demand, to restore the wetland function of the reserve, and to improve the ecological environment. In addition, it considers the ecological service value of the reserve in order to achieve a shared increase in the ecological and economic benefits. The optimization model of the ecological water replenishment of Boluo Lake wetland considered the minimum ecological water replenishment as the objective function, while the water diversion capacity, water supply capacity, water diversion sequence, functional area, and ecological service value of the Lake bubble were utilized as constraints in order to restore the ecosystem function of the Boluo Lake National Nature Reserve. The results from the model revealed that the amount of ecological water replenishment was significantly reduced after optimization simulation, with the maximum reduction range in the ecological water replenishment being −100.00% and −74.58%. In addition, the total amount of flood diversion was significantly increased, and the flood resources could be fully utilized. Moreover, the recovery effect on the lake and pond functional areas was significant and compared much better to that prior to the ecological water replenishment, which was up to 2300.00% and 1987.59%. The ecological service value also increased significantly, and the rate of this increase was as high as 23.90% and 21.58%. In the present study, an optimization model was constructed for the ecological water replenishment of the Boluo Lake wetland supplement project based on the interval two-stage stochastic programming method, which would achieve the entire scope of ecological and economic benefits of the ecological water replenishment project by realizing the ecological system reconstruction and providing a feasible and reliable plan to the decision-makers.
Hydrological Impact of Typhoon on Rivers
Authors: Huang Jr-Chuan , Lee Tsung-Yu
Published: April 2021

Rivers link terrestrial and marine ecosystems, not only transporting numerous substances downstream but also shaping landscapes and fostering aquatic ecosystems through physical interactions and biogeochemical processes with numerous agents. On the other hand, hydraulic facilities, such as reservoirs, hydropower plants, and banks are deployed to utilize water resources for sustaining human society. In the river network systems, rainstorms, as episodic/periodic strong triggers, can induce mass wasting from hillslopes, accelerating nutrient transport, which causes sequential effects. In recent decades, global warming has been accelerating water cycling via thermodynamics, and thus, the frequency and intensity of extreme rainstorms are increasing in intensity. In the West Pacific, typhoons (alias tropical cyclones in Asia) characterized by strong wind and torrential rainfall are evidenced to be getting stronger. The intensified typhoons inevitably stimulate the response of river systems through sediment and nutrient transport and threaten the safe operation of the hydraulic facilities and even coastal communities through storm surge flooding. These strong impacts on river systems should be comprehensively explored. This issue aims to improve the understanding of typhoon effects in river systems. Inter- and cross-disciplinary studies on different watershed scales, linking ecosystem services and watershed management, are particularly addressed.
LA DEFICIENCIA EN EL TRABAJO SOCIAL POST-ADOPCIÓN EN TABASCO
Authors: Cruz-Latournerie Eduardo
Published: April 2021

Los constantes cambios en el comportamiento social, que van desde la tendencia de las parejas a no contraer matrimonio, hasta la conducta errática de la personalidad humana, vemos que es cada vez menos posible que las personas opten por la adopción como método para tener hijos; y si a eso se le suma que nuestra legislación es un larga, por no decir difícil tramitología en su sistema para que una pareja alcance la adopción de una persona, menor o no, pues más difícil aún se hace el proceso para este fin. Desde luego que este arduo camino tiene un motivo justificado. El Estado en su afán de procurar en todo momento la conformación de la familia y crear un vínculo originado en el matrimonio, vela por los intereses de todos los miembros, y en el caso particular de la adopción, antepone el bien del menor ante las necesidades de los demás, en este caso, los adoptantes.
La protection constitutionnelle de l’environnement à Madagascar
Authors: Randrianandrasana Ianjatiana
Published: April 2021

Avec le « constitutionnalisme vert » , la plupart des Constitutions intègrent des préoccupations relatives à l’environnement. Aux premiers abords, la Constitution malgache paraît d’avant-garde en la matière. Dès sa version originaire, en 1959, elle a eu des dispositions relatives à la préservation des ressources naturelles et de l’environnement. Ces dispositions sont régulièrement reprises par les différentes versions de la Constitution, jusqu’à celle actuellement en vigueur. La question se pose de savoir si cette constance de ces dispositions se traduit par une effectivité de la protection. Pour ce faire, l’engagement des autorités sera étudié à l’aune des répartitions des compétences et de la portée normative des dispositions constitutionnelles.
An Electrical Stimulation Culture System for Daily Maintenance-Free Muscle Tissue Production
Authors: Akiyama Yoshitake , Nakayama Akemi , Nakano Shota , Amiya Ryuichiro , Hirose Jun
Published: April 2021

Low-labor production of tissue-engineered muscles (TEMs) is one of the key technologies to realize the practical use of muscle-actuated devices. This study developed and then demonstrated the daily maintenance-free culture system equipped with both electrical stimulation and medium replacement functions. To avoid ethical issues, immortal myoblast cells C2C12 were used. The system consisting of gel culture molds, a medium replacement unit, and an electrical stimulation unit could produce 12 TEMs at one time. The contractile forces of the TEMs were measured with a newly developed microforce measurement system. Even the TEMs cultured without electrical stimulation generated forces of almost 2 mN and were shortened by 10% in tetanic contractions. Regarding the contractile forces, electrical stimulation by a single pulse at 1 Hz was most effective, and the contractile forces in tetanus were over 2.5 mN. On the other hand, continuous pulses decreased the contractile forces of TEMs. HE-stained cross-sections showed that myoblast cells proliferated and fused into myotubes mainly in the peripheral regions, and fewer cells existed in the internal region. This must be due to insufficient supplies of oxygen and nutrients inside the TEMs. By increasing the supplies, one TEM might be able to generate a force up to around 10 mN. The tetanic forces of the TEMs produced by the system were strong enough to actuate microstructures like previously reported crawling robots. This daily maintenance-free culture system which could stably produce TEMs strong enough to be utilized for microrobots should contribute to the advancement of biohybrid devices.
Artificial Heart Neural Networks – An Idea
Authors: Gajawada Satish , Kumar Arun , Celestina Vanaja Dr. Maria , Sri Valikala Baby Supriya
Published: April 2021

Artificial Neural Networks Field (ANN Field) is an exciting field of research. ANN field took its inspiration from Human Brain. The heart and Brain are very important for the survival of Humans. Research Scientists published many articles by giving importance to Brain. But scientists have not yet explored much on the Heart which is another important part in addition to the Brain. The primary purpose of publishing this article is to show a path to ANN field Research Scientists by introducing the concept of “Heart” into Artificial Neural Networks. In this paper, we coined and defined “Artificial Heart Neuron,” which is the basic part of Artificial Heart Neural Networks Field (AHNN Field) in addition to Artificial Neuron. This work takes its inspiration from both Heart and Brain.
Development of a Portable IP-Based Remote Controlled System for Mobile Robot
Authors: O. A. Daramola , O. O. Obe , A. Oriolowo
Published: April 2021

The use of Mobile Robots to interact with objects in remote locations has proved to be useful in areas not easily accessible or too dangerous for humans. Various means have been used to remotely operate or control Mobile Robots. These range from wired connection to Wireless connection like radio frequency signal and more recently internet controlled Mobile Robot using the TCP/IP protocol stack. However, the problem of remote control dependence on the Mobile Robot Platform or configuration has made it difficult to switch controllers between Mobile Robots. In this work, a portable IP based remote control system has been designed and implemented to remove the constraint imposed by the Mobile Robot's platform in choosing the control interface. The system developed was built on three loosely coupled components working together to ensure a high degree of Control interface portability. The Mobile Robot Gateway component was used to receive and send data from the Mobile Robot.
Catering Students Perception on Working in Hospitality Jobs
Authors: Senthil Kumar S
Published: April 2021

Hotel Management Institutions are growing year after year in south Tamilnadu. More & more students are passing out every year. In recent years many of them are showing interest to join in the hotel management course because of various opportunities available in the course as well as the fastest career growth in the industry. When the students join this course, they have a very positive attitude towards this course, year by year, this positive attitude is decreasing when they are passing out/ final year of study they want to change their industry. Hence in this study, a structured questionnaire was prepared and circulate among the students to find the reason. The data scrutinize with the help of SPSS. Further, the t-test, Anova test to find out the significant differences and concluded with some suggestions to enhance the training experience of the students.
A Study on Consumer’s Opinion towards Packaged Instant Food Products in Madurai City
Authors: Duraichamy J , Karthik T T
Published: April 2021

In developing countries like India both men and women are working for survival; in this tight schedule, packaged instant foods make their cooking process easy and saves time. Packaged instant food products simplify the cooking process and speed ups the cooking. Nowadays, every supermarket shelf is filled with instant food products. As customers are willing to buy more, so it is important to analyze their opinion regarding packed instant food. In a study, an attempt ah been made to analyze the customer’s level of opinion towards packaged instant food. The objective of the study is to analyze the opinion of the customers towards packaged instant food products. A sample survey was conducted in Madurai city; the sample size is 45. The questionnaire has been used to collect primary data from the respondents. SPSS software is used to analyze the data statistics.
The Propaganda Model in the Digital Age: A Review of Literature on the Effects of Social Media on News Production
Authors: Demuyakor John
Published: April 2021

The 21st century is best described by many as the Digital Age. The digital revolution at the beginning of the century has witnessed the introduction of social media platforms. About two decades now, globally, the are several questions on the effects of social media on the new production. While a section of media and communication experts view that social media has positively promoted news production, other scholars strongly see the negative side of social media in news production, especially with the context of the propaganda model. The objective of this article is to offer insightful review literature on the effects of social media on news production, within the context of the propaganda model to improve the reader’s understanding of the role of social media news production. The review is divided into two sections; the first part gives us much insight into what the propaganda model is all about, and the second section critically looks at the net effects of social media in news making via the propaganda model.
A Study on Jainism History, Philosophy and Traditions in Tamilnadu
Authors: Rajeshwari M , Amirthavalli A
Published: April 2021

In Tamil Nadu Hinduism and Buddhism, Jainism is one of the three oldest Indian strict conventions still in presence and a necessary piece of South indian strict conviction and practice. While frequently utilizing ideas imparted to Hinduism and Buddhism, the consequence of a typical social and phonetic foundation, the Jain convention should be viewed as a free marvel as opposed to as a Hindu order or a Buddhist blasphemy, as some previous Western researchers accepted. In South India, Jainism is minimal in overflow of a name. Indeed, even genuine understudies of religion in India gave little consideration to it. In a populace of almost 60 crores of individuals, Jainas may establish almost nearly 3 million individuals. Jainism is the religion of the Jains who follow the way, lectured and rehearsed by the Jinas. It is a fully evolved and grounded religion and social framework that rose up out of 6 century BC .The trademark highlight of this religion is its case to all inclusiveness which it holds essentially contrary to Brahmanism. It very well may be said that throughout the previous 2500 years the Jains have contributed such a huge amount to each circle of life of Indian individuals both as a religion and a way of thinking. They contributed a lot to the regions of culture, language, exchange and agribusiness, or all in all the Jains opened up another period of human thoughts and musings. In Indian History, endeavors were made to contemplate Jainism as a religion and its commitments yet focus on the Jain movement into Tamil Nadu and its effects are restricted. An endeavor is made in this examination to investigate the recorded geology of the Jain focuses in Tamil Nadu.
The Role of Voluntary Military Training in Facilitating Officer - Like Qualities among the Youth: A Case Study on Bangladesh National Cadet Corps
Authors: Huda Kazi Nazmul
Published: April 2021

The prime objective of this study is to appraise the role of Voluntary Military Training in facilitating Officer-Like Qualities (OLQ) among the youths taking Bangladesh National Cadet Corps (BNCC) as a case. A qualitative research method, primarily an in-depth face to face interview, was conducted to obtain the opinions from former BNCC cadets who had experienced cadetship and were selected in armed forces, or civil services later as an officer. Unearthing the limitations of the program, the study tried to investigate how the OLQ factors are facilitated through VMT program of BNCC. The findings of the study project BNCC camping as a potential event of VMT which mostly covers all the factors of OLQ. Hence, the study also suggested Human Resource Development interventions to develop the instructional capacity among the BNCC officers and military instructors. BNCC is an apex government organization engaged in transforming the youth into a potential leader. Therefore this organization should be supported to transform it into a centre of excellence by facilitating OLQ among the youth generation of Bangladesh.
Uso de energía cinética para la obtención de energía eléctrica para señalamientos viales tipo leds y alumbrado publico aplicado en la Ciudad de la Venta, Tabasco
Authors: Martinez-Valera Elizabeth , Muñoz-Roque Micaela
Published: April 2021

This research deals with the generation of alternative energy, for the implementation of traffic lights, we all need the use and use of electric power as an instrument of transformation in the community of La Venta Tabasco. There is no awareness of the use of road signs, by the drivers of this City; that is why it is proposed to design and implement a technical infrastructure that allows to use and transform the kinetic energy of vehicular traffic in transit areas. The main objective is to obtain the greatest amount of energy from the use of a speed multiplier, the inertia of a disk and an electric generator. The potential energy of a vehicle due to its weight can be exploited through a mechanism that transforms it into kinetic energy and then into electrical energy and channel it for the use of supply for road signs type LEDS and for public lighting, Helping the social environment and to our planet so as not to contaminate it anymore.
Análisis experimental de la difusión salina durante la desalación por congelación
Authors: Castillo-Téllez Beatriz , Castillo-Téllez Margarita , López-Vidaña Erick César , Mejía-Pérez Gerardo Alberto
Published: April 2021

The consequences on health and low life quality caused by the problem of water scarcity, as well as the interrelation between energy and water supply, call attention to water desalination by Freezing Melting (F/M), which is a well-known technique but unfortunately, not used for this application, which is considered the most sustainable, in terms of its lower energy demand compared with commercial desalination techniques (about 70% less than thermal desalination). However, it presents some problems regarding the saline trapping in the ice, therefore, in this work, an experimental analysis is carried out to achieve a better understanding of the saline displacement, using an aqueous solution of sodium chloride, frozen at different temperatures, and configurations containers, with a F/M progressive desalination. It has been found that, at a freezing temperature of 8oC, it is possible to purify up to an average of 78.12% of the frozen salt solution, obtaining an easy-to-separate brine.
Construcción y pruebas preliminares de un prototipo experimental para evaluar la transferencia de calor en un tubo de sección transversal cuadrada en un intercambiador de calor
Authors: Valdiviezo-De los Santos Noel Esteban , Silva-Aguilar Oscar , Colorado-Garrido Dario , Alaffita-Hernández Alejandro
Published: April 2021

The contribution of this research is to determine the change in the heat flow by the axial torsion in a tube of square cross section. The tube studied is part of a prototype heat exchanger designed and built by the research group in "Engineering and simulation of energy processes" of the Universidad Veracruzana, Coatzacoalcos region, Veracruz. The experimental prototype was designed and constructed with PVC pipe and the test section with aluminum tubes. The heat transfer of equipment was from 5 to 60 kJ with volumetric flows from 3 to 20 l/min and water as a working fluid. The tube without axial torsion (0°) is compared with three other tubes with 180°, 360° and 540° torsion. The experimental results reported in this study show the preliminary experimental tests where four levels of water flow are configured, using flow and temperature measurement instruments. The preliminary experimental results reveal an increase in the heat transfer in the equipment as the degree of axial torsion in the square section tubes is increased.
Evaluación del funcionamiento de un prototipo de electrofloculación para el tratamiento de agua residual proveniente de procesos de biodigestión y biocompostaje
Authors: Alfonso-Alvarez Juan Antonio , Montaño-Soto Myriam Tatiana , Eaton-González Bernardino Ricardo , Véliz-Zamorano Ana Karina
Published: April 2021

Introduction. In recent years, the Government of Baja California has promoted not to discharge wastewater with high content of fats and oils. A company in the region dedicated to the collection of sludge, installed a horizontal centrifugation system for the extraction of oil, generating a sludge with 5% fat and oil. The result of this process is sent to a process of biodigestion and vermicompost for the generation of solid and liquid humus, which generates wastewater with high organic load that require a treatment before disposal. Objective. Develop an experimental prototype of electroflocculation to wastewater treatment with a high content of organic matter. Methodology was divided into 4 stages: 1) Physicochemical and biological characterization of the wastewater; 2) Assembly of the electroflocculation prototype; 3) Experimental assessment 4) Verification of system operation. Contribution. Through the elaboration of the prototype, the effectiveness of the electroflocculation process was confirmed for the wastewater treatment (WT) with a high content of organic matter (OM) and pathogenic bacteria, since a greater than 50% decrease of the biochemical oxygen demand (BOD5), chemical demand of oxygen (COD), fecal coliforms and Salmonella.
Control Robusto H∞ en forma Global para Robot Manipulador
Authors: Chávez-Guzmán Carlos , Esqueda-Elizondo José , Merida-Rubio Jovan , Colores-Vargas Juan Miguel
Published: April 2021

In this paper is proposed a solution to the tracking problem with robust H_∞ global control, applied to robot manipulator completely actuated with rotational joint in presence of external disturbances. The Hamilton-Jacobi-Isaacs inequality is verified by a strict function of Lyapunov and enough conditions will be found under which the equilibrium point of the closed-loop system is asymptotically stable globally while the disturbed system has a gain L_2 less than or equal to a predetermined constant. Currently, one of the disadvantages of the H_∞ control, with respect to other control techniques, is the linearization of the system around a point of equilibrium, which converts the Hamilton-Jacobi-Isaacs inequality into algebraic of Riccati equations, which facilitate the solution to the motion control problem H_∞, however, the controller becomes local. Now, through a strict function of Lyapunov it was possible to verify that the Hamilton-Jacobi-Isaacs inequality is satisfied globally. The theory is validated in a robot manipulator with l degree of freedom.
Modelado y simulación del péndulo de base móvil
Authors: López-Ortega Filemón , Cárdenas-Maciel Martha , Serrano-Zepeda Rogelio , Lara-Ceballos Miguel Ángel
Published: April 2021

This article describes the simulation and control of a mobile base pendulum (PBM), which consists of a mechanism with two wheels and a vertical cylindrical rod, which can rotate freely on its own axis, then the mobile must move to compensate for the angular displacement of the pendulum. The objective is to develop a mathematical model to simulate the dynamic behavior of the mechanism and thereby develop a Proportional, Integral and Derivative (PID) controller, optimal that manages to maintain this pendulum at a vertical degree in a time ts ≤ 1 second, with an entry angle of ± 10 degrees. The Newton-Euler (NE) methodology was used to determine the dynamic equations of motion, by analyzing the free body diagram and using the physical laws that allow defining the forces acting on the system to achieve the state of equilibrium. These simulations were carried out with the SolidWorks (SimMechanics Link) and Matlab (Simulink) tools, in addition a closed loop system was used to analyze the output signal Y (s) with respect to the input signal U (s). The contributions of this development consist of designing high-precision controllers with the purpose of improving industrial automation processes from the implementation of a control system, in areas such as robotics, marine vehicles, aerospace, to name a few examples.
Propiedades ópticas y estructurales de las películas de óxido de silicio rico en silicio obtenidas por la técnica HFCVD
Authors: Castillo-Tépox Nora , Luna-López José Alberto , Hernández-De la Luz José Álvaro David , Monfil-Leyva Karim
Published: April 2021

In this work we present the results of the analysis obtained from the deposit and characterization of thin films of silicon rich oxide (SRO). The films were obtained by hot filament chemical vapor deposition (HFCVD) technique, such films were deposited on silicon substrates p-type. The deposit of thin films was realized considering different distances from source to substrate (DFS) which were 3, 4, 5 and 6 mm. The quantity of precursors (SiO2) was controlled by the distance from the filament to the source, which was 6 mm for this work, the filament was held at 2000°C. A constant 3-minute deposit time was maintained, and the hydrogen flow level was 10 sccm. The films thickness was obtained by using the profilometry technique, the thickness range was from 200 to 600 nm. The vibrational molecular modes of the SRO films were obtained by Fourier Transform Infrared Spectroscopy (FTIR). The films of 3 mm DFS exhibit an optical transmittance of 90%. The optical energy band gap of the thin films varies from 2.2 to 3.3 eV. When an annealing process at 1000°C was carried out for one hour, the SRO films increase their photoluminescence by an order of magnitude approximately.
Alcohol Abuse
Authors: Gachoki John M.
Published: April 2021

The article sets out to examine the correlation between the drinking problem that has beset youth of Central Kenya and the oaths that were taken by residents in the region in the wake of the struggle for socio-political and economic independence (in 1950s). It is worthwhile to recall that the Mau Mau philosophy discouraged the abuse of drugs, and especially alcohol. It was the belief that the breach of oaths spelt calamity. The youth might disassociate themselves from beliefs of their fathers and forefathers. However, since most of them are Christians, nominal or practical, they should be awed because the bible has it that, ‘’. . . I, the Lord your God, am a jealous God, punishing the children for the sin of the fathers to the third and fourth generation . . .’’ (Deuteronomy 5:9). Characteristically, the communities in Central Kenya share many aspects of culture, especially beliefs and religious practices. For example, breach of oaths was a taboo. The article seeks to establish the connection between the high degree of alcohol abuse to the violation of oaths that the Mau Mau (freedom fighters) patriots took before and during the State of Emergency (1952-1960). Certainly, anything taboo was ominous. Mau Mau agitated for independence, and more importantly, the return of land, the bond that bound together the living, the dead and the unborn. Land was seen in our indigenous society as sacred and it was not to change hands in any way. Mau Mau took oaths to the effect that whoever breached it would attract catastrophe, including death. In view of this, the article would seek to establish if the drinking problem in the Mount Kenya (central) region is a consequence of breaching Mau Mau oaths.
Single Parenting and the Emotions of Adolescents in Secondary Schools
Authors: Tubei Martha j. , Kodero H.M.N , Kimani C
Published: April 2021

The article sets out to demonstrate the influence of single parenting on the emotions of adolescents in secondary schools in Eldoret Municipality. It sets on the premise that the family is the basic functional social unit in determining the healthy growth and development of children. That emotional wellbeing of the child is significantly tied to the parenting styles and skills. In its methodology, it employs the descriptive study design. Computer programmes, both descriptive and inferential statistics were used in data analyses. The descriptive statistics used in analysis includes means, frequencies and percentages, whereas inferential statistics were t-test for independent samples and Chi-square tests; with results of the analysis showed that there was non-significant difference. Students from single parent families and those from two parent families do not differ in their emotional level t(279) =-.49,P =.626. It is theoretically informed by Erik Erikson’s (1982) theory of psychosocial development. The central argument of Erikson’s theories emphasizes on the importance of early childhood experiences on later growth and development of the child. Erikson (1968) hypothesized that the personality of an individual forms as the ego progresses through a series of interrelated stages. Each of these ego stages has critical period of development. Personality develops in a series of turning points, which he described in terms of dichotomous of desirable qualities and dangers. The study findings provided a basis for equipping teachers, couples, single parents, policy makers and organization dealing with children on psychological well-being and adolescents from single families and those from intact families.
Trust, Religiousity, Income, Quality of Accounting Information, and Muzaki Decision to Pay Zakat
Authors:   Sekolah Tinggi Ekonomi Islam SEBI (STEI SEBI), Bahri Efri Syamsul , Suhaeti Ade ,   Sekolah Tinggi Ekonomi Islam SEBI (STEI SEBI), Nasution Nursanita ,   Sekolah Tinggi Ilmu Ekonomi
Published: April 2021

This study tests the factors that influence the decision of muzaki in channeling zakat, namely: trust, religiosity, income, and quality of accounting information. This study is a survey of 40 muzaki from Amil Zakat Institution (known as LAZ) Zakat Sukses in Depok. This study uses the purposive sampling method. Data analysis using SPSS 25 software with multiple linear regression analysis. The results of this study indicate that trust, religiosity, income, and the quality of accounting information simultaneously influence the decision of muzaki to distribute zakat through LAZ Zakat Sukses in Depok. Partially, trust, religiosity, and income positively affect the decision of muzaki to distribute zakat through LAZ Zakat Sukses. Meanwhile, the quality of accounting information has a negative impact on muzakki's decisions in distributing zakat through LAZ Zakat Sukses. This study's scope is on the muzaki at LAZ Zakat Sukses Depok. Therefore, the results may not represent nationally. Therefore, similar studies in collecting more large-scale data and broader areas will be useful. The implication is that LAZ Zakat Sukses need to show zakat management's performance to increase muzaki trust.
Hubungan dukungan sosial dengan kualitas hidup lansia
Authors: Nofalia Ifa
Published: April 2021

Penuaan merupakan fenomena global yang mempengaruhi negara maju dan berkembang. Faktor penentu kesehatan fisik dan mental pada populasi lansia tentunya berbeda. Jaringan sosial yang kuat dengan tingkat dukungan sosial yang tinggi umumnya merupakan faktor pelindung untuk menjaga kesehatan dan kualitas hidup yang baik di usia tua. Tujuan penelitian ini adalah untuk mengetahui hubungan dukungan sosial dengan kualitas hidup lansia.

Penelitian ini menggunakan desain crossectional. Populasi dalam penelitian ini adalah semua lansia yang ada di Dusun Boti Desa Turi Kecamatan Tambakrejo Kabupaten Bojonegoro sebanyak 112 orang dengan jumlah sampel sebanyak 40 responden dengan menggunakan teknik pengambilan sampel simple random sampling. Dukungan sosial merupakan variabel independen dan kualitas hidup lansia menjadi variabel dependen. Pengumpulan data menggunakan kuesioner. Pengolahan data dengan editing, koding, skoring, tabulating dan analisis menggunakan uji statistik Korelasi Spearman’s rho dengan alpha 0,05.

Hasil penelitian menunjukkan sebagian besar dukungan sosial kategori baik sebanyak 21 responden (52,5%) dan kualitas hidup lansia sebagian besar baik sebanyak 23 responden (57,5%). Hasil uji statistik Korelasi Spearman’s rho didapatkan nilai p = 0,007 lebih kecil dari alpha 0,05 sehingga H1 diterima.

Kesimpulan dalam penelitian ini adalah ada hubungan dukungan sosial dengan kualitas hidup lansia di Dusun Boti Desa Turi Kecamatan Tambakrejo Kabupaten Bojonegoro.
Persepsi keluarga dengan riwayat kanker payudara dalam upaya deteksi kanker payudara
Authors: Prasetyaningati Dwi
Published: April 2021

Keluarga merupakan bagian penting dalam proses perawatan anggota keluraga yang menderita sakit. Pengalaman kesakitan dan berbagai terapi yang dilalui oleh penderita kanker payudara memberikan dampak pengalaman kepada keluarga secara langsung untuk mempersepsikan bagaimana harus bertindak supaya tidak terjadi hal yang sama baik pada diri sendiri atau anggota keluarga lainya. Penelitian ini dilakukan untuk mendapatkan pengalaman langsung dari anggota keluarga yang merawat penderita kanker payudara dan bagaimana persepsinya dalam upaya deteksi dini kanker payudara  secara langsung.

Partisipan berjumlah empat orang dari  pasien penderita kanker payudara yang dipilih dengan teknik purposive. Wawancara dijalankan secara semi-terstruktur. Transkrip wawancara kemudian dianalisis dengan pendekatan Interpretative Phenomenological Analysis (IPA). Tema superordinat yang ditemukan mencakup (1) Persepsi keluarga terhadap kanker sebagai penyakit yang mengancam kehidupan, (2) Pengalaman keluarga merawat penderita kanker, (3) Masalah yang dihadapi Keluarga saat melakukan perawatan selama sakit, (4) Upaya mempertahankan kesehatan, (5) Persepsi deteksi dini kejadian Kanker Payudara.

Empat partisipan menunjukkan pemaknaan dan memiliki persepsi yang beragam di aspek kehidupannya tentang penyakit kanker payudara dan pemaknaan persepsi pentingnya melakukan deteksi dini kanker payudara.

Kesimpulan dalam penelitian adalah berbagai pengalaman dengan beban biopsikososiospiritual yang dialami, memunculkan persepsi tentang pentingnya deteksi dini dalam upaya pencegahan kanker payudara