bluuebunny/crossref_metadata_2025 huggingface dataset:
Spiritual Fitness: A New Dimension in Alzheimer’s Disease Prevention
Authors: Khalsa Dharma Singh , Newberg Andrew B.
Published: February 2021

Background: Religious and spiritual interventions may have an effect on Alzheimer’s disease prevention. Kirtan Kriya meditation has been shown to mitigate the deleterious effects of chronic stress on cognition, reverse memory loss, and create psychological and spiritual wellbeing, which may reduce multiple drivers of Alzheimer’s disease risk. Objective: To detail a new concept in medicine called Spiritual Fitness, a merging of stress reduction, basic wellbeing, and psycho/spiritual wellbeing to prevent Alzheimer’s disease. Methods: The literature on the topics mentioned above is described, including an in-depth discussion on why and how each are critical to advancing the future of Alzheimer’s disease prevention. The many negative effects of chronic stress, and the benefits of Kirtan Kriya, are reviewed. The four pillars of basic wellbeing, six practical aspects of psychological wellbeing, and the four new non-sectarian features of spiritual fitness are then disclosed. Moreover, instructions on practicing Kirtan Kriya are offered in the Supplementary Material. Conclusion: Religious and spiritual practices, including Kirtan Kriya, are crucial components in the development of enhanced cognition and well-being, which may help prevent and, in some cases, reverse cognitive decline. The key point of this review is that making a commitment to live a brain longevity lifestyle including spiritual fitness is a critically important way for aging Alzheimer’s disease free. We hope that this article will inspire scientists, clinicians, and patients to embrace this new concept of spiritual fitness and make it a part of every multidomain program for the prevention of cognitive disability.
The Contribution of Ocular Biomarkers in the Differential Diagnosis of Alzheimer’s Disease versus Other Types of Dementia and Future Prospects
Authors: Chalkias Efthymios , Topouzis Fotis , Tegos Thomas , Tsolaki Magda
Published: February 2021

With dementia becoming increasingly prevalent, there is a pressing need to become better equipped with accurate diagnostic tools that will favorably influence its course via prompt and specific intervention. The overlap in clinical manifestation, imaging, and even pathological findings between different dementia syndromes is one of the most prominent challenges today even for expert physicians. Since cerebral microvasculature and the retina share common characteristics, the idea of identifying potential ocular biomarkers to facilitate diagnosis is not a novel one. Initial efforts included studying less quantifiable parameters such as aspects of visual function, extraocular movements, and funduscopic findings. However, the really exciting prospect of a non-invasive, safe, fast, reproducible, and quantifiable method of pinpointing novel biomarkers has emerged with the advent of optical coherence tomography (OCT) and, more recently, OCT angiography (OCTA). The possibility of analyzing multiple parameters of retinal as well as retinal microvasculature variables in vivo represents a promising opportunity to investigate whether specific findings can be linked to certain subtypes of dementia and aid in their earlier diagnosis. The existing literature on the contribution of the eye in characterizing dementia, with a special interest in OCT and OCTA parameters will be reviewed and compared, and we will explicitly focus our effort in advancing our understanding and knowledge of relevant biomarkers to facilitate future research in the differential diagnosis between Alzheimer’s disease and common forms of cognitive impairment, including vascular dementia, frontotemporal dementia, and dementia with Lewy bodies.
Impact of DaTscan Imaging on Clinical Decision Making in Clinically Uncertain Parkinson’s Disease
Authors: Isaacson Jonathan R. , Brillman Salima , Chhabria Nisha , Isaacson Stuart H.
Published: February 2021

Background: The diagnosis of Parkinson’s disease (PD) is primarily clinical, but in cases of diagnostic uncertainty, evaluation of nigrostriatal dopaminergic degeneration (NSDD) by imaging of the dopamine transporter using DaTscan with single-photon emission computed tomography (SPECT) brain imaging may be helpful. Objective/Methods: In the current paper, we describe clinical scenarios for which DaTscan imaging was used in a prospective case series of 201 consecutive patients in whom a movement disorder specialist ordered DaTscan imaging to clarify NSDD. We describe the impact of DaTscan results on changing or confirming pre-DaTscan clinical diagnosis and on post-DaTscan treatment changes. Results/Conclusion: DaTscan imaging can be useful in several clinical scenarios to determine if NSDD is present. These include in patients with early subtle symptoms, suboptimal response to levodopa, prominent action tremor, drug-induced parkinsonism, and in patients with lower extremity or other less common parkinsonism clinical presentations. We also found DaTscan imaging to be useful to determine underlying NSDD in patients with PD diagnosis for 3-5 years but without apparent clinical progression or development of motor fluctuations. Overall, in 201 consecutive patients with clinically questionable NSDD, DaTscan was abnormal in 58.7% of patients, normal in 37.8%, and inconclusive in 3.5%. DaTscan imaging changed clinical diagnosis in 39.8% of patients and led to medication therapy changes in 70.1% of patients.
The experiences of active duty military spouses with advanced degrees in maintaining and advancing their careers
Authors: DaLomba Elaina , Greer Mary Jan , Cruz Erika , Harris Abigail , King Caitlyn , Laurel Liberty , McCuaig Tatiana , Wilder Remy
Published: February 2021

BACKGROUND: Individuals married to active duty military members experience a significantly higher rate of un/underemployment than their civilian counterparts; those with advanced degrees are most impacted. Occupation is central to individual identity and adaptation; therefore, individual occupational struggles can impact family systems. Evidence shows military spouse career concerns impact service member retention, making spouse employment related to national security; however there is limited research on active duty spouses, particularly those with advanced degrees. OBJECTIVE: This phenomenological study explored the experiences of activity duty military spouses with advanced degrees focusing on maintaining and advancing their careers. METHODS: Semi-structured face-to-face interviews were used to explore experiences of military spouses with advanced degrees actively seeking to work in their profession. Inductive content analysis was used to derive overarching themes to respond to the research questions. RESULTS: Four major themes emerged: uniqueness of military life impacts; professional adaptation: flexibility, creativity and reinvention of the professional self; enhanced sense of duty/professional integrity; and need for enhanced forms of career support. CONCLUSIONS: Military spouses with advanced degrees value and have a right to occupation, including work. Military life presents unique barriers to this. Results have implications for healthcare providers and policy-makers.
Preventive action with a population of excavator drivers exposed to whole-body vibration
Authors: Bossi P. , Meert P.
Published: February 2021

BACKGROUND: Whole-body vibration is a major cause of lower back pain among employees, and the medical and preventive care teams of occupational health departments are often confronted with lower back pain problems among machine operators. OBJECTIVES: The objectives of this research are to determine the number of excavator drivers exposed to whole-body vibration levels above 0.5m/s2, identify other exposure factors that may contribute to back pain, and propose corrective measures. METHODS: Vibration measurements were carried out on individual excavator drivers while they were observed carrying out working tasks, after which prevention advice is given. Factors which determine vibration levels are logged on to a database. RESULTS: The multivariate analysis of several determining factors shows vibration exposure levels vary depending on the varied work tasks being carried out. CONCLUSION: This study identifies exposed employees among excavator operators. For each workstation, the determining factors that could explain the high exposures to vibrations are identified. This work shows the important role of tasks on exposure levels. A better adaptation of the tools used to carry out work tasks would allow a decrease in the vibration level of this type of machine.
Impact of respiratory motion artifact on coronary image quality of one beat coronary CT angiography
Authors: Shen Wenting , Chen Yang , Qian Wen , Liu Wangyan , Zhu Yinsu , Xu Yi , Zhu Xiaomei
Published: February 2021

BACKGROUND: Accuracy of CT-derived fractional flow reserve depends on good image quality. Thus, improving image quality during coronary CT angiography (CCTA) is important. OBJECTIVE: To investigate impact of respiratory motion artifact on coronary image quality focusing on vessel diameter and territory during one beat CCTA by a 256-row detector. METHODS: We retrospectively reviewed patients who underwent CCTA under free-breathing (n = 100) and breath-holding (n = 100), respectively. Coronary image quality is defined as 4-1 from excellent to poor (non-diagnostic) and respiratory motion artifact severity is also scored on a 4-point scale from no artifact to severe artifact. Coronary image quality and respiratory motion artifact severity of all images were evaluated by two radiologists independently. RESULTS: Compared with free-breathing group, the image qualities are significantly higher in per-segment, per-vessel and per-patient levels (P < 0.001) and proportion of segments with excellent image quality also improves significantly (73.6% vs 60.1%, P < 0.001) in breath-holding group. The image quality improvement occurs in medium-sized coronary arterial segments. Coronary image quality improves with respiratory motion artifacts decreasing in both groups, respectively. CONCLUSION: During one heartbeat CCTA, breath-holding is still recommended to improve coronary image quality due to improvement of the image quality in the medium-sized coronary arteries.
Risk factors for gastroesophageal reflux disease symptoms related to lifestyle and diet
Authors: Taraszewska Anna
Published: February 2021

Gastroesophageal reflux disease (GERD) is one of the most common diseases of the upper gastrointestinal tract. The most characteristic symptom of the disease is heartburn, which occurs at least once a week. The prevalence of the disease varies and, depending on the region of the world, it may affect from a few to over 30% of an adult population. It is estimated that in Poland this disease may affect up to 35.5% of adults reporting abdominal ailments. If untreated, the disease can lead to serious complications including precancerous conditions and esophageal adenocarcinoma. Pharmacotherapy is considered as the first-line treatment in GERD patients but lifestyle modifications, including diet changes, are an important element supporting the treatment of the disease. Many factors may contribute to the development of the disease. Among them, there are non-modifiable factors such as age, sex or genetic factors and modifiable factors, e.g. lifestyle, diet, excessive body weight. This review focuses on GERD risk factors related to lifestyle and nutrition that include both dietary components and nutritional behaviour. Lifestyle risk factors that may contribute to GERD symptoms include excessive body weight, particularly obesity, moderate/high alcohol consumption, smoking, postprandial and vigorous physical activity, as well as lack of regular physical activity. Many studies indicate fatty, fried, sour, spicy food/products, orange and grapefruit juice, tomatoes and tomato preserves, chocolate, coffee/tea, carbonated beverages, alcohol as triggers for GERD symptoms.
Eating habits such as irregular meal pattern, large volume of meals, eating meals just before bedtime may correlate with the symptoms of GERD. The role of lifestyle, diet and eating habits as risk factors for GERD is not clearly understood, and the results of the available studies are often contradictory. Determination of modifiable risk factors for this disease and its symptoms is important for effective dietary prevention and diet therapy of GERD.
Postharvest responses of Carnation cut flowers to Prunus cerasoides mediated silver nanoparticles
Authors: Le Tu Thi Anh
Published: February 2021

Introduction: The procedure to synthesize silver nanoparticles (SNPs) from Prunus cerasoides leaf extract and their effect on vase life and flower quality of cut carnation were investigated.

Methods: SNPs were bio-synthesized from Prunus cerasoides leaf extract and characterized by using UV-Vis technique, TEM, and SEM images. The postharvest responses of carnation cut flowers to the biosynthesis SNPs were evaluated through vase life, relative fresh weight, vase solution uptake, flower diameter of cut carnation.

Results: SNPs were synthesized under optimum conditions, including using the extract of leaf heating at 60 oC in 30 min, 4 mM of silver nitrate, pH of 11, and 180 min of reaction time. SNPs exhibited antimicrobial activity and then alleviated the bacterial development in the preservative solution. All treatments with SNPs had improved the vase life and quality of cut carnation compared to the control. A vase solution containing 2% sucrose enhanced the carnation cut flowers.

Conclusions: The preservative solution containing 25 ppm SNPs and 2% sucrose showed the best effect. SNPs could be used as a promising antibacterial agent applied in the preservative solution for cut carnation flowers.
Density functional theory insights into the bonding of CH3OH and CH3O with Ir(111) surface
Authors: Pham Thong Le Minh , Phung Khoa Thanh , Ho Thang Viet , Le Thi Anh , Nguyen An Thai Thi
Published: February 2021

Introduction: Understanding the adsorption characteristics of CH3OH and CH3O on the noble metal surfaces is essential for designing better catalysts for the on-board production of hydrogen from CH3OH. This study aims to provide insights into the adsorption behavior of these molecules on Ir(111) surface.
Methods: The adsorption structure, the adsorption energy, and the bonding mechanism of CH3OH and CH3O with Ir(111) surface were investigated by means of the density functional theory (DFT) calculations and the Bader charge analysis.
Results: The DFT results show that the adsorption of CH3OH and CH3O is driven by the formation of Ir–O bond at the top site of the surface by the overlap of O-2p and Ir-5d orbitals. The overlap of these orbitals is greater in the absorption of CH3O, resulting in stronger adsorption energy of CH3O (2.23 eV vs. 0.32 eV). In agreement with the adsorption strength, the charge transfer from CH3O to the surface is significantly larger than from CH3OH (0.386 e vs. 0.073 e).
Conclusion: Although driven by the same adsorption bond, the difference in the molecular characteristics leads to a marked difference in the absorption strength of CH3OH and CH3O on Ir(111) surface.
Development of digestive organs in goslings raised for meat, depending on lithium level in mixed feeds
Authors: Morklyak M. I. , Grybanova A. A. , Sobolev O. I.
Published: February 2021

Recently, the vital necessity of lithium for living organisms has been experimentally proven and also it was previously considered as a conditionally essential trace element. Numerous experimental research conducted on various animals and poultry types have revealed quite wide and diverse properties of lithium, in particular, antimicrobial, antiviral, antitumor, anti-stress and antioxidant. The discovery of biological properties and the disclosure of biochemical mechanisms of lithium action became the basis for its use in veterinary and zootechnical practice. Lithium preparations are successfully used to treat various animal diseases, prevent and correct “technological” stresses in poultry, increase its productive qualities and improve the quality of meat products. Despite the biochemical complexity and practical significance of this trace element, lithium is still insufficiently used during feeding poultry due to the lack of optimal standards for introducing it into mixed feed. During developing optimal standards for lithium introduction into mixed feed, it is necessary to evaluate not only the indicators of poultry productivity and product quality, but also the physiological indicators of its development. The effect of additives of different lithium doses in compound feeds on the development of digestive organs in goslings raised for meat was studied in a scientific-economic experiment. The research was conducted on the breed of goslings “Danish Legart”. The duration of experiment was 70 days. The lithium introduction into compound feeds for goslings, in doses of 0.15 mg/kg, 0.20 and 0.25 mg/kg, had a positive effect on the development of their digestive organs, as evidenced by the tendency to increase the intestine mass (by 2.2–4.8 %) and its total length (by 0.5–1.1 %), as well as an increase in the liver mass (by 2.0–7.0 %) and muscle stomach (by 3.4–7.3 %). Goslings had the best macromorphological indicators of digestive development, whose mixed feed were enriched with lithium at the rate of 0.15 mg/kg during the entire growing period. A comparison of goslings live weight of the experimental groups with indicators of the development of intestines, liver and muscular stomach allows to claim that their digestive organs were better developed and functioned more actively during the growing period.
The Passive Family in Baltic
Authors: Nau Nicole , Spraunienė Birutė , Žeimantienė Vaiva
Published: February 2021

Predicative constructions with passive participles in Latvian and Lithuanian exhibit great variation in form, meaning and function, ranging from pure passive to various temporal, aspectual and modal meanings. This paper uses a set of formal and functional parameters to distinguish and profile several types and subtypes of such constructions. These types are mutually related by family resemblance and constitute a ‘Passive Family’. They include dynamic and stative passives, three types of resultatives, several types of subjectless (impersonal) passives, modal constructions expressing possibility or necessity, and evidential constructions. Based on a thorough study of corpus data, the paper not only adds new insights about constructions that were already known, but also presents construction types that have not been discussed in the literature on the Baltic passive before: the Lithuanian cumulative-retrospective construction and theLatvian cumulative-experiential subtype.
Water aspects of innovative development of transit economy and cross-border cooperation
Authors:   Market Economy Institute of RAS, Zoidov Kobilzhon Kh. , Medkov Alexey A. ,   Market Economy Institute of RAS
Published: February 2021

В статье содержится постановка проблемы водного взаимодействия государства и хозяйствующих субъектов разных стран в процессе инновационного развития их транзитных экономик, проанализированы глобальные водные отношения. Цель. Разработка, внедрение и распространение эффективных корпоративных организационно-институциональных механизмов решения водохозяйственных проблем на новых принципах. Задачи. Доказать, что водные аспекты развития транзитной экономики в России, странах Центральной Азии (ЦА) и Западной Азии (ЗА) имеют колоссальное и всё возрастающее значение и в скором времени превратятся в определяющий фактор геополитического и геоэкономического мироустройства. Показать, что традиционные международные правовые механизмы регулирования трансграничных взаимодействий не отвечают насущным потребностям государств в данной сфере, не отражают всего многообразия взаимодействий по линии «вода – электроэнергия – сельское хозяйство – транспортно-транзитная система». Методология. В исследовании использованы методы миросистемного анализа, теории технико-экономических укладов системного анализа, производственно-технологической сбалансированности экономики, эволюционно-институциональной теории. Результаты. Выявлены факторы, усугубляющие дефицит воды, показано несовершенство международного правового механизма регулирования использования пресной воды и трансграничных водотоков. Выработаны предложения по совершенствованию международных институтов и механизмов регулирования трансграничных водотоков. Определена роль развития водного сектора транзитной экономики при создании и инновационном развитии глобальной Евразии. Выявлены, описаны и систематизированы функции Евразийской транспортно-транзитной компании (ЕТТК) по повышению эффективности и инновационному развитию водно-энергетических ТТС на пространстве глобальной Евразии. Выводы. Требуется корпоративизация водотранспортного хозяйства, развитие такой формы взаимодействия государств и бизнесов, как межгосударственно-корпоративное партнёрство (МКП) – организационно-институциональной формы эволюционного развития транзитной экономики. Евразийская транспортно-транзитная компания должна управлять водно-энергетическими объектами, задействованными в транзитных перетоках электроэнергии и воды, выполнять функции гидродипломатии. Евразийская транспортно-транзитная компания – институционально-организационный механизм наднационального глобального водного партнёрства, ликвидации разрушительного соперничества между государственным и частным сектором в области управления и использования водных ресурсов.
Reliability Based Design Optimization of Reinforced Concrete Frames Using Genetic Algorithm
Authors: Seify Asghshahr Mohammadreza
Published: February 2021

This paper introduces a new framework for reliability based design optimization (RBDO) of the reinforced concrete (RC) frames. This framework is constructed based on the genetic algorithm (GA) and finite element reliability analysis (FERA) to optimize the frame weight by selecting appropriate sections for structural elements under deterministic and probabilistic constraints. Modulus of elasticity of the concrete and steel bar, dead load, live load, and earthquake equivalent load are considered as random variables. Deterministic constraints include the code design requirements that must be satisfied for all the frame elements according to the nominal values of the aforementioned random variables. On the other hand, this framework provides the minimum required reliability index as the probabilistic constraint. The first-order reliability method (FORM) using the Newton-type recursive relationship will be used to compute the reliability index. The maximum inter-story drift is considered as an engineering demand parameter to define the limit-state function in FORM analysis. To implement the proposed framework, a mid-rise five-story RC frame is selected as an example. Based on the analysis results, increasing the minimum reliability index from 6 to 7 causes an 11 % increase in the weight of the selected RC frame as an objective function. So, we can obtain a trade-off between the optimized frame weight and the required reliability index utilizing the developed framework. Furthermore, the high values of the reliability index for the frame demonstrate the conservative nature of code requirements for interstory drift limitations based on the linear static analysis method.
Simulation research on dynamic performance of the new type high-pressure solenoid valve
Authors: YU Qihui , WANG Qiancheng , ZHANG Kaifei , ZHENG Weiwei
Published: February 2021

To improve energy density, the transportation, storage, and operations of hydrogen, methane, and compressed air vehicles currently require high-pressure compression. High-pressure solenoid valve becomes the vital element to above system. In order to reduce leakage and aerodynamic force influence, a new type high-pressure solenoid valve was proposed. The simulation model which included electromagnetic model, aerodynamic force model was established by means of the nonlinear mathematic models. Using the software MATLAB/Simulink for simulation, the dynamic response characteristics of high-pressure pneumatic solenoid valve were obtained under different pulse width modulation (PWM) input control signals. Results show that, first of all, the new type of high-pressure solenoid valve can meet the switch requirement. Secondly, the opening movement and closing movement of the spool lags the PWM rising signal, and the coil current fluctuates significantly during the movement of the spool. Lastly, on/off status of high-pressure valve cannot be represented by the duty cycle. This research can be referred in the design of the high-pressure solenoid valve..
Gestión del turismo comunitario en el sector indígena de la provincia de Chimborazo caso: La Moya
Authors: Ordóñez Bravo Elsa Flor , Fernández Sánchez Lineth del Rocío , Auquilla Belema Luis Armijo , Silva Viteri Xavier Alejandro
Published: February 2021

El turismo comunitario en Ecuador no ha tenido el éxito esperado por diversos factores culturales y coyunturales, por ello se realizó un análisis de la gestión del turismo comunitario La Moya en un sector indígena de la provincia de Chimborazo, tomado como estudio de caso al emprendimiento de la comunidad La Moya, cuyo objetivo fue analizar la situación actual a través de un mapa situacional, luego se realizó un análisis cualitativo que permitió determinar los puntos críticos en los procesos, mediante la matriz DAFO. En la metodología se escogió 35 personas hombres y mujeres mayores de 15 años que trabajan en el emprendimiento de turismo comunitario, de quienes se obtuvo información utilizando herramientas como el análisis situacional con la matriz DAFO. Los resultados permitieron evidenciar que los limitantes de la gestión del turismo comunitario en la Moya son de carácter operativo y administrativo, lo que conlleva a tomar acciones correctivas estableciendo funciones por puestos de trabajo para evitar él desvió de recursos materiales.
Influencia de las tendencias del comportamiento del consumidor turístico en el desarrollo responsable del destino Holguín
Authors: Pérez Ricardo Elizabeth del Carmen , Medina Labrada Justa Ramona , Fernández Cueria Noel
Published: February 2021

Las nuevas tendencias del comportamiento del consumidor turístico han modificado la forma de operar de los negocios a nivel internacional. Actualmente, los clientes son fieles a las marcas que se preocupan por la preservación del planeta, las comunidades locales y la sociedad en general. De esta manera, las empresas buscan responder a las crecientes demandas de los consumidores, asumiendo políticas de responsabilidad social, entendidas como una nueva cultura empresarial basada en la gestión ética, que puede servir como cauce para mejorar la competitividad y la reputación de sus negocios. En este contexto emerge el turismo responsable, que trata de ofrecer una experiencia enriquecedora al cliente, al mismo tiempo que se corresponde con las nuevas tendencias en el comportamiento de los consumidores. Esta modalidad de turismo no sólo permite a las organizaciones diferenciarse en el mercado, sino mostrar una imagen más humana y obtener una reputación de empresa turística socialmente responsable, lo cual puede constituir una importante ventaja competitiva. El destino Holguín, de gran relevancia para la industria turística en el Oriente del país, ha apostado por el turismo responsable como estrategia de desarrollo, por lo cual la presente investigación tiene como objetivo evaluar la influencia de las tendencias internacionales del comportamiento del consumidor turístico en el desarrollo del turismo responsable en el destino. Para identificar las principales tendencias del comportamiento del consumidor turístico a partir de las literaturas consultadas fue realizado un análisis de correlación y además se empleó el criterio de expertos para determinar el grado de influencia de estas tendencias en el desarrollo del turismo responsable. Como resultado se identificaron aquellas tendencias del comportamiento del consumidor que influyen en las buenas prácticas del turismo responsable en el destino Holguín y se analizaron los indicadores que poseen resultados positivos en el destino y los indicadores en que se debe trabajar para alcanzar una práctica total de turismo responsable.
Indicadores para la medición de los costos ambientales en entidades de alojamiento turístico: Una necesidad ante la sostenibilidad del uso de los recursos.
Authors: Perera Conde Lidie , Nogueiras Valdés Anel , Alcober Álvarez Rafael Reinier
Published: February 2021

La pertinencia del uso de la contabilidad de gestión ambiental en la toma de decisiones está dirigida a la sostenibilidad de los recursos, sin embargo, las empresas cubanas no consideran en su contabilidad los costos ambientales que   generan, ya   que   aún   es   limitada   la   cultura   contable   asociada   al medioambiente y es escasa la base normativa en este sentido. Mayor relevancia ganan las empresas turísticas, que demandan gran consumo de recursos, impactan el medio y a su vez dependen de ellos como atractivos turísticos. La presente investigación tuvo como objetivo general proponer indicadores que permitan medir los costos ambientales derivados de la gestión empresarial del Hotel Roc Presidente. Se aplicaron las técnicas investigativas de análisis documental y de contenido, además de la entrevista, y los datos fueron recolectados de fuentes de información primaria y secundaria. Los resultados obtenidos conllevaron a identificar y describir los aspectos fundamentales de la gestión ambiental del hotel y proponer indicadores afines a dicha gestión que le permitirán a la entidad medir los costos ambientales anuales y tomar decisiones encaminadas a lograr una Gestión Ambiental más eficiente.
Propuesta de acciones estratégicas para la implementación del modelo de negocio online en las agencias de la OSDE Viajes Cuba
Authors: Roche Góngora Alfonso Lázaro
Published: February 2021

El comercio electrónico es una de las tendencias con mayor auge en la industria de viajes y turismo. En Cuba, las agencias de viajes gubernamentales agrupadas en la OSDE Viajes Cuba se han planteado incorporar el comercio electrónico a su modelo de negocio. Sin embargo, todavía existen muchas limitaciones en los sitios web de estas agencias y no se han activado pasarelas de pagos en la mayoría de estos sitios. Asimismo, cada agencia por separado lleva a cabo su propia estrategia de implementación del modelo de negocios online. El presente trabajo propone un grupo de acciones estratégicas para implementar y perfeccionar el modelo de negocios online en las agencias de viajes de la OSDE Viajes Cuba. Para ello se tuvo en cuenta las buenas prácticas de las agencias de viajes online líderes en el sector, las principales tendencias relativas al comercio electrónico en las agencias de viajes y la experiencia acumulada por las agencias de la OSDE Viajes Cuba. Entre las principales propuestas se encuentran: pautas a seguir para el diseño de los sitios web y la selección de pasarelas de pagos, creación de un departamento de comercio electrónico dentro de las agencias, desarrollo de campañas de gestión de la reputación online y de redes sociales, establecimiento de una estrategia de precios competitiva, activación de programas de fidelización, implementación de una estrategia de colaboración entre las agencias de viajes cubanas con respecto al comercio electrónico, entre otras.
Pautas metodológicas según las bases de planes de estudio “E”. Gestión de agencias de viajes.
Authors: Olivera Elosegui Rebeca , Rodríguez González Maité
Published: February 2021

La carrera de Licenciatura en Turismo se encuentra inmersa en el proceso de asimilación del plan de estudio “E”, lo que ha propiciado que los diferentes colectivos que integran las disciplinas se enfoquen a adaptar sus asignaturas, y contenidos de las mismas, a las nuevas tendencias y particularidades del nuevo plan de estudio. Tal es el caso de la Gestión de agencias de viajes, la cual es parte del currículo base de la carrera y contribuye a comprender los productos “viajes”, temática imprescindible para adquirir una percepción del fenómeno turístico. Es por ello que se define como objetivo general de la presente investigación la aplicación de las pautas metodológicas según las bases conceptuales de diseño del Plan “E” en el proceso de enseñanza aprendizaje de la asignatura Gestión de Agencia de Viajes de la Licenciatura en Turismo.  Se aplicaron como principales métodos el análisis bibliográfico, el análisis documental, las entrevistas abiertas a profesores y estudiantes y 2 cuestionarios a estudiantes de la carrera de Licenciatura en Turismo, obteniéndose como resultados primordiales la definición de las pautas metodológicas pertinentes para la asignatura y sus impactos en el proceso de enseñanza aprendizaje.
Investigation of variable viscosity and thermal conductivity on MHD mass transfer flow problem over a moving non-isothermal vertical plate
Authors: Ahmed Sahin , Hazarika G. C. , Gogoi Geeti
Published: February 2021

In this paper we investigate numerically the influence of variable viscosity and thermal conductivity on MHD convective flow of heat and mass transfer problem over a moving non-isothermal vertical plate. The viscosity of the fluid and thermal conductivity are presumed to be the inverse linear functions of temperature. With the help of similarity substitution, the flow governing equations and boundary conditions are transformed into non-dimensional ordinary differential equations. The boundary value problem so obtained is then solved using MATLAB bvp4c solver. The effects of various parameters viz. magnetic parameter, viscosity parameter, thermal conductivity parameter, stratification parameter and Schmidt number on velocity, temperature and concentration are obtained numerically and presented trough graphs.  Also the coefficient of skin-friction, Nusselt number and Sherwood number are computed and displayed in tabular form. The effects of the viscosity parameter and thermal conductivity parameter in particular are prominent. This study has applications in a number of technological processes such as metal and polymer extrusion.
Influence of the transom immersion to ship resistance components at low and medium speeds
Authors: Kamal I. Z. Mustaffa , Ismail A. Imran , Abdullah M. Naim , Ahmed Y. Adnan
Published: February 2021

The transom stern offered some advantages over the traditional rounded cruiser stern reducing the resistance of a ship. This can only be achieved if the transom stern is carefully designed with suitable transom immersion ratio. In this study, the influence of different transom area immersion ratios on the resistance components was investigated for a semi-displacement hull and a full displacement hull.  The base hull was based on NPL hull form and KCS hull form for a semi-displacement and full-displacement hull respectively. The transom immersion ratios for the NPL hull were varied at a ratio of 0.5, 0.7, 0.8 and 1.0.  The resistance of each of the NPL hull form was simulated at Froude number 0.3 up to 0.6. The transom immersion ratios for the KCS hull were varied at a ratio of 0.05, 0.1, 0.15 and 0.3. The resistance of each of the KCS hull form was simulated at Froude number 0.195, 0.23, 0.26 and 0.28.  The transoms of both hulls were modified or varied systematically to study the influence of the transom shape or immersion on the total and wave resistance components. The investigation was carried out using a CFD software named SHIPFLOW 6.3 based on RANSE solver. These results on the NPL hull shows that the larger the transom immersion, the higher the resistance will be for a semi-displacement vessel. The increased resistance is contributed by additional frictional and wave resistance components. The results for the KCS hull seems to contradict with the results obtained from the NPL hull. The larger and deeper transom for the case of KCS hull form sometimes can be beneficial at higher Froude number.
PENDETEKSIAN KERUSAKAN SEPEDA MOTOR DENGAN SISTEM PAKAR MENGGUNAKAN METODE CERTAINTY FACTOR
Authors: Azhar Zulfi
Published: February 2021

Peran sistem pakar sangat diperlukan oleh banyak kalangan untuk mampu menjawab dari beberapa permasalahan dan memberikan solusi yang terbaik melalaui sistem yang sudah diprogramkan dari seorang yang ahli dalam bidangnya.  Bengkel Budiman di Asahan yang merupakan salah satu jenis usaha yang bergerak dalam bidang otomotif, service serta perbaikan sepeda motor, sudah memiliki banyak pelanggan, namun masih bersifat manual pada proses  solusi   perbaikan. Maka dibutuhkan suatu aplikasi sistem pakar, dalam menganalisa gangguan sistem pada sepeda motor untuk mempermudah proses diagnosa kerusakan dan solusi permasalahannya sehingga akan memepermudah penanganan kerusakan  secara cepat dan efisien. Metode yang dilakukan pada aplikasi sistem pakar ini yaitu dengan menggunakan metode Certainty Factor (CF). Dimana Metode Certainty Factor (CF) adalah suatu metode untuk membuktikan apakah suatu fakta itu pasti ataukah tidak pasti yang berbentuk metric yang biasanya digunakan dalam sistem pakar dalam mendiagnosa kerusakan pada sepeda motor.Kata Kunci : bengkel Budiman, gangguan sistem, metode certainty factor, sepeda motor, sistem pakar,
PREDIKSI MINAT KONSUMEN TERHADAP PRODUK PERUSAHAAN DIRECET SELLING TIANSHI MENGGUNAKAN ARTIFICIAL NEURAL NETWORK (ANN)
Authors: Samosir Khairunnisa
Published: February 2021

Abstract: Tiansi is a company that markets health products. This company has difficulty predicting people's interest in products that are in high demand. By knowing precisely the consumer interest in the product, it will increase sales. The research aims to predict consumer interest in Tiansi products appropriately. The method used is one of the Artificial Neural Network (ANN) techniques, namely Backpropagation with Momentum. The sales data tested were sourced from Stockist 319 Padang. The results of this research that can precisely determine consumer interest are architecture 5-2-1 and 5-3-1. So that this research is very helpful in the procurement of goods to increase the value of sales. Keywords: Artificial neural network, backpropagation, consumer  interest rates, predictions.  Abstrak: Tiansi merupakan sebuah perusahaan yang memasarkan produk-produk kesehatan. Perusahaan ini mengalami kesulitan dalam memprediksi minat masyarakat terhadap produk yang sangat diminati. Dengan mengetahui dengan tepat minat konsumen terhadap produknya, maka akan dapat meningkatkan penjualan. Penelitian ini bertujuan untuk memprediksi minat konsumen terhadap produk Tiansi dengan tepat. Metode yang digunakan salah satu teknik Artificial Neural Network (ANN), yaitu Backpropagation dengan Momentum. Data penjualan yang diuji bersumber dari Stokist 319 Padang. Hasil dari penelitian ini yang dapat dengan tepat menentukan minat konsumen adalah arsitektur 5-2-1 dan 5-3-1. Sehingga penelitian ini sangat membantu sekali dalam pengadaan barang untuk meningkatkan nilai penjualan. Kata kunci: Jaringan Syaraf Tiruan, Backpropagation, prediksi, minat konsumen, penjualan.
INTEGRASI METODE NEIVE BAYES DAN SOFTWARE RAPIDMINER DALAM ANALISIS HASIL USAHA PERUSAHAAN DAGANG
Authors: Nofitri Rika , Irawati Novica
Published: February 2021

Keuntungan menjadi target utama di sebuah perusahaan. Setiap perusahaan menginginkan keuntungan yang dicapai sesuai dengan target yang diinginkan. Akan tetapi perusahaan beranggapan target yang dicapai tersebut didapat karena hasil penjualan yang besar. Perusahaan tidak melihat faktor lainnya yang mempengaruhi hasil keuntungan seperti biaya, stok, pembelian dan faktor-faktor lain dalam menyusun laporan akhir perusahaan. Selain itu, pengelolaan data yang dilakukan selama ini pun tidak menyeluruh, dikarenakan banyak nya data yang harus dianalisis sehingga memerlukan alat bantu dalam pengelolaannya. Penelitian ini bermaksud untuk menganalisa faktor yang mempengaruhi hasil keuntungan berdasarkan data hasil keuntungan. Dengan melakukan integrasi menggunakan metode naive bayes dan alat bantu software rapidminer, teknik ini akan menghasilkan informasi berupa pola hubungan atau keterkaitan antar factor satu dengan lainnya dalam mempengaruhi tercapainya laba. Sedangkan software rapidminer untuk mempermudah dalam menganalisis data hasil keuntungan.Hasil dari penelitian ini diharapkan menjadi landasan untuk memprediksi hasil keuntungan perusahaan dagang.
ANALISIS PENGGUNAAN DRIVER MINI VICTOR L298N TERHADAP MOBIL ROBOT DENGAN DUA PERINTAH ANDROID DAN ARDUINO NANO
Authors: Amin Muhammad , Ananda Ricki , Eska Juna
Published: February 2021

Abstact: A robot is a set of mechanical devices or shaped vehicles that can perform physical tasks, both with human supervision and control, in the form of programs that have been defined in advance. Robot cars designed by researchers, use two commands to perform physical tasks. First use the command from Google Voice, which is the command with voice, and the second uses the command using the Android button, so that access to the robot can be done by anyone and anywhere. The work system of the robot car design is designed, when the robot car commands, the command will be juxtaposed or compared, and when the data is compared according to the data being controlled, the system will run according to the data or command earlier. For each module, it uses a voltage of 5V, while for a DC motor, it uses an external voltage of 7.4 VDC. Keyword: Robot car, Arduino controller, Google voice. Abstrak: Robot merupakan seperangkat alat mekanik atau berbentuk kendaraan yang bisa melakukan tugas fisik, baik dengan pengawasan dan kontrol manusia, berupa program yang telah didefisinikan terlebih dahulu. Mobil robot yang dirancang peneliti, menggunakan dua perintah untuk melakukan tugas fisik. Pertama menggunakan perintah dari google voice, yaitu perintah dengan suara, dan yang kedua menggunakan perintah menggunakan tombol button android, sehingga akses untuk memerinta robot dapat dilakukan oleh siapa saja dan dimana saja. Sistem kerja dari rancangan mobil robot yang dirancang, ketika mobil robot memberi perintah, maka perintah tersebut akan disandingkan atau dibandingkan, dan ketika data yang dibandingkan sesuai dengan data yang dicontroller, maka sistem akan berjalan sesuai dengan data atau perintah tadi. Untuk setiap modul, menggunakan tegangan 5V, sedangkan untuk motor DC, menggunakan tegangan eksternal sebesar 7.4 VDC. Kata Kunci: Mobil robot, controller arduino, google voice.
PENGEMBANGAN PROGRAM KOMPUTASI RUMUS EKSPLISIT METODE BEDA HINGGA PADA TURUNAN KEDUA MENGGUNAKAN MATLAB
Authors: Syafwan Havid , Syafwan Mahdhivan , Ramdhan William , Andri Yusda Riki
Published: February 2021

Abstract: In this paper we discuss the development of computational application program in MATLAB to calculate the second derivative of a function by using finite difference method for various types (forward, backward, or central) and any order of accuracy. The MATLAB program extends the similar one which has been developed for the first derivative. The program is designed as an implementation of the explicit formulas of finite difference formulated by Khan and Ohba. Through this program, one can easily calculate the second derivative of a function numerically with any order of accuracy and visualize it in a graphical form. Error of numerical derivatives in each order of accuracy confirm the validity of the obtained results.

Keywords: finite difference method, explicit formula, second derivative, MATLAB programming Abstrak: Dalam makalah ini dibahas pengembangan program aplikasi komputasi pada MATLAB untuk menghitung turunan kedua suatu fungsi dengan menggunakan metode beda hingga pada berbagai tipe (maju, mundur, atau pusat) dan sebarang orde ketelitian. Program MATLAB ini melanjutkan program serupa yang telah dibuat untuk turunan pertama. Program ini dirancang sebagai implementasi dari rumus eksplisit beda hingga yang diformulasi oleh Khan dan Ohba. Melalui program ini, seseorang dengan mudah dapat menghitung turunan kedua suatu fungsi secara numerik dengan sebarang orde ketelitian dan memvisualisasinya dalam bentuk grafik. Galat dari turunan numerik di setiap orde ketelitian mengkonfirmasi kevalidan hasil yang diperoleh. Kata kunci: metode beda hingga, rumus eksplisit, turunan kedua, pemrograman MATLAB
Peranan Nilai Perusahaan dalam Memoderator Pengaruh Fundamental terhadap Kinerja Keuangan pada Perusahaan Sektor Aneka Industri
Authors: Susanti Elly , Azwar Khairul , Nainggolan Christine Dewi
Published: February 2021

IHSG fluctuated from 2015 to 2019 due to the trade war between the U.S. and China resulting in the performance of various industrial sector indices declining. In addition, the factors that cause the decline also come from the company's fundamentals (CR, DAR and TATO) The purpose of this study is to review and analyze the role of the company's value in moderating the fundamental influence of the company on financial performance in multi-industry sector companies recorded in the IDX period 2015 - 2019. The type of research used in this research is quantitative research. The population of 50 issuers uses purposive sampling techniques so that the sample used as many as 19 issuers. Data analysis techniques used are descriptive statistical analysis, classical assumption test, hypothesis test and residual test. The results obtained are known simultaneously the fundamentals of the company (CR, DAR and TATO) have a significant effect. Partially CR and TATO have a positive and significant effect on ROA while DAR has a negative and significant impact on ROA which means that by indicating that the company is able to manage the company's working capital by utilizing the company's assets for operational activities it can improve the company's performance but on the contrary with a high level of debt it will decrease financial performance. While the company's value (PBV) has no role in the influence between the company's fundamentals on financial performance
Estudo de revisão sistemática de Literatura na Educação: Paul Ricoeur em foco
Authors: Radaelli Mara Regina Rosa , Rigue Fernanda Monteiro
Published: February 2021

O presente estudo trata-se de uma Revisão Sistemática de Literatura, no Manancial - Repositório Digital da Universidade Federal de Santa Maria. Possui como propósito identificar as pesquisas em nível de Mestrado e Doutorado que tem como foco as produções e o pensamento do filósofo Paul Ricoeur. Os achados da investigação foram submetidos a tratamento de dados e análise, permitindo identificar suas especificidades no contexto de investigação. Os dados apontam para a pluralidade de possibilidades que o Repositório possui, bem como uma série de publicações que estão vinculadas à ênfase conceitual e de abordagem decorrentes da compreensão de Ricoeur, principalmente no Programa de Pós-graduação em Filosofia, apontando para seu potencial de exploração em demais áreas, como no caso a área da educação.
Relato de experiência sobre a percepção da influência da agroecologia no bem-estar de horticultores rurais através de projeto sistematizador
Authors: Pereira Fernanda da Silva
Published: February 2021

A agroecologia surge como um fulgor à vida de agricultores rurais, a sua base em produção sustentável pode garantir uma maior qualidade de vida a população rural. Este relato de experiência procura expor percepções obtidas através de um trabalho desenvolvido com um grupo de agricultores agroecológicos, moradores em uma comunidade da zona rural do município de Cacoal-RO. O objetivo é relatar uma experiência cujos dados foram coletados através da vivência e observação sobre a influência que as práticas agroecológicas apresentaram na melhoria do bem-estar dos agricultores e assim contribuir com futuras pesquisas que acresça a capilaridade das ações agroecológicas. O grupo de agricultores é composto por 10 famílias que trabalham diretamente com agroecologia e participam das atividades ativamente. O trabalho de acompanhamento do grupo foi de aproximadamente 12 meses. As percepções analisada neste relato se deram simultaneamente ao processo de sistematização de práticas agroecológicas do grupo Bem Viver, atividades que faziam parte da execução de um projeto de mestrado. Conclui-se que o trabalho da horta exerceu forte influência na melhoria da autonomia e bem-estar dos integrantes do grupo.