bluuebunny/crossref_metadata_2025 huggingface dataset:
Cocoa improves age-associated health and extends lifespan in C. elegans
Authors: Munasinghe Mihiri , Almotayri Abdullah , Thomas Jency , Heydarian Deniz , Weerasinghe Maneka , Jois Markandeya
Published: December 2020

BACKGROUND:

Cocoa, one of the richest dietary sources of polyphenols has been studied for its health promoting effects, but how long-term consumption of cocoa affects age-associated health and lifespan is not well defined.

OBJECTIVE:

The objective of this study was to determine the effects of long-term cocoa consumption on age-associated health and lifespan in C. elegans

METHODS:

The standard E. coli OP50 diet of wild type C. elegans was supplemented with cocoa powder starting from L1 stage until they die. Body length and area were measured as indicators of worm nutrition. Age associated health was determined at different stages of life as day 4, day 8 and day 12 using worm locomotion, thermotolerance, cognition and mitochondrial function. In addition, lifespan was evaluated.

RESULTS:

Cocoa improved age-associated decline in neuromuscular function. Both mean and median lifespan were extended by cocoa supplementation. However, maximum lifespan was not affected. Cocoa showed beneficial effects on thermotolerance at all ages (more prominent effects at young (day 4) and middle (day 8) age). Further, consumption of cocoa improved age-related learning deficits, short-term memory loss and mitochondrial dysfunction.

CONCLUSIONS:

Long-term cocoa consumption seemed to improve age-associated health and extends lifespan in C. elegans
Adaptive changes in muscle activity after cryotherapy treatment: Potential mechanism for improvement the functional state in patients with multiple sclerosis
Authors: Radecka Aleksandra , Knyszyńska Anna , Łuczak Joanna , Lubkowska Anna
Published: December 2020

BACKGROUND: The available literature lacks data about the influence of whole body cryotherapy (WBC) on muscle activity in patients with sclerosis multiplex (MS). OBJECTIVE: Assessment of the influence of the 20 WBC series on the surface electromyography (sEMG) signal and the relationship between it and the functional state in patients with MS. METHODS: The study group was 114 of MS patients (aged 45.24±11.88yr.,) which 74 of them received 20 of WBC. An assessment was made of: the hand grip (HGS), Timed 25-Foot Walk, Fatigue Severity Scale, sEMG signal from the dominant limb. RESULTS: After a series of 20 WBC: in the rest electromyograms, an increase of extensor carpi radialis (ECR) and a decrease of flexor carpi radialis (FCR) amplitude were demonstrated (non-normalized signal ECR p = 0.0001); significant differences in sEMG rest signals between ECR and FCR have decreased; for voluntary contraction in both assessed antagonistic muscle amplitude was significantly decreased (p = 0.0005; p = 0.0316, p = 0.0185); an increase of HGS (p < 0.001); gait improvement (p = 0.001); decrease fatigue (p = 0.024). No significant changes were observed in the control group. CONCLUSIONS: Series of 20 WBC improves the functional state and reduces fatigue in patients with MS, which may be due to adaptive changes in bioelectrical muscle activity.
Handedness switching as a presenting sign for pediatric low-grade gliomas: An insight into brain plasticity from a short case series
Authors: Ghazwani Yahya , Patay Zoltan , Sadighi Zsila S. , Sparrow Jessica , Upadhyaya Santhosh , Boop Frederick , Gajjar Amar , Qaddoumi Ibrahim
Published: December 2020

PURPOSE: To describe clinical data, rehabilitation services, and outcomes of children with handedness switching as their presenting symptom before low-grade glioma (LGG) diagnosis. METHODS: A retrospective chart review was performed for five patients (four female and four white) with LGG and confirmed handedness switching before LGG diagnosis. RESULTS: All children were less than 8 years at diagnosis, and two patients were less than 3 years. All children were initially right-handed and experienced loss of motor function, ranging from weakness to paresis, in their dominant hand. The median time from switching handedness to diagnosis was 1 month (range: 0.75–60 months). Rehabilitation was offered for three patients, and motor function deficits in the initial dominant hand were resolved in two of the total cohort. At long-term follow-up, hand dominance returned to the initial hand in three patients. CONCLUSIONS: Handedness switching should be acknowledged as a potential sign of LGG in children, and early long-term rehabilitation services should be offered for these children.
A real-time management system for the indoor environmental quality and energy efficiency in a hotel guestroom
Authors: Li Qingyun , Koo Choongwan , Lu Lin , Han Jie
Published: December 2020

With the concept of green hotel, the hotel industry has started to consider a sustainable design and operation to obtain more competitiveness. It is needed to implement a convenient way to recognize a real-time situation about the indoor environmental quality (e.g., temperature, relative humidity, CO2, TVOCs, PM2.5, etc.) and the relevant energy efficiency in a hotel guestroom. This study aimed to develop a scalable integrated platform for providing real-time monitoring, alert notification, and analytics so as to satisfy the level of the occupants’ comfort and satisfaction. Facility managers could gain insight from the real-time hierarchical and historical information and take actions at a point of time. The novel approach could create a comfortable and healthy environment for the occupants in a hotel guestroom while realizing the energy efficiency in real time. The proposed platform was validated with three guestrooms in a hotel, and the scalability of the system was fully confirmed. In the future studies, it is expected to deploy the proposed platform to a larger physical entity of the hotel, providing flexibility and expandability in accordance with the strategic facility planning of the hotel. Furthermore, it is planned to develop various kinds of occupant-centered services in a hotel guestroom level.
Z-score neurofeedback, heart rate variability biofeedback, and brain coaching for older adults with memory concerns
Authors: Meeuwsen Kyle D. , Groeneveld Kayleah M. , Walker Linda A. , Mennenga Anna M. , Tittle Rachel K. , White Elyse K.
Published: December 2020

Background:

The three-month, multi-domain Memory Boot Camp program incorporates z-score neurofeedback (NFB), heart rate variability (HRV) biofeedback, and one-on-one coaching to teach memory skills and encourage behavior change in diet, sleep, physical fitness, and stress reduction.

Objective:

This prospective trial evaluates the Memory Boot Camp program for adults ages 55 to 85 with symptoms of Mild Cognitive Impairment (MCI) and subjective memory complaints.

Methods:

Participants were evaluated via the Montreal Cognitive Assessment (MoCA), NeuroTrax Global Cognitive Score, measures of anxiety, depression, sleep, quality of life, quantitative electroencephalography (QEEG), and HRV parameters at four timepoints: baseline, pre-program, post-program, and follow-up. The trial included a three-month waiting period between baseline and pre-program, such that each participant acted as their own control, and follow-up took place six months after completion of the program.

Results:

Participants’ MoCA scores and self-reported measures of anxiety, depression, sleep quality, and quality of life improved after treatment, and these changes were maintained at follow-up. Physiological changes in HRV parameters after treatment were not significant, however, breathing rate and QEEG parameters were improved at post-program and maintained at follow-up. Finally, participants’ improvement in MoCA score over the treatment period was correlated with their improvement in two brain oscillation parameters targeted by the z-score NFB protocol: relative power of delta and relative power of theta.

Conclusions:

Trial results suggest that the Memory Boot Camp program is a promising treatment strategy for older adults with symptoms of MCI and subjective memory complaints.
On model-based nowcasting for highly disaggregated levels
Authors: Esteban María-Dolores , Morales Domingo , Pérez Agustin , Sperlich Stefan
Published: December 2020

Nowadays, national and international organizations experience an increasing demand for timely and disaggregated socio-economic indicators. More recently, this demand extends to the request for nowcasting indicators. Small Area Estimation has a long tradition in indicator prediction for high levels of disaggregation; but when speaking of ‘prediction’, this notation refers to the fact that the centre of interest is a random parameter. Prediction of future values, or similarly, nowcasting has hardly been studied so far. Yet, mixed models based Small Area Estimation is designed for imputing (missing) values, and these models can easily account for temporal correlation. Therefore, model assisted nowcasting would be a natural extension. This article reviews existing methods under this perspective to highlight the necessary ingredients, and then propose nowcasting procedures for highly disaggregated indicators that could already be used with the today’s available software.
Objective assessments of human motor ability of the upper limb: A systematic review
Authors: Duque Edwin , Trefftz Helmuth , Srivastava Sakti
Published: December 2020

BACKGROUND:

Most of the patients who survive stroke, spinal cord or others nervous system injuries, must face different challenges for a complete recovery of physical functional impairment. An accurate and recurrent assessment of the patient rehabilitation progress is very important. So far, wearable sensors (e.g. accelerometers, gyroscopes) and depth cameras have been used in medical rehabilitation for the automation of traditional motor assessments. Combined with machine learning techniques, these sensors are leading to novel metric systems for upper limb mobility assessment.

OBJECTIVE:

Review current research for objective and quantitative assessments of the upper limb movement, analyzing sensors used, health issues examined, and data processes applied such as: selected features, feature engineering approach, learning models and data processing techniques.

METHOD:

A systematic review conducted according to the PRISMA guidelines. EBSCOHOST discovery service was queried for relevant articles published from January 2014 to December 2018 with English language and scholarly peer reviewed journals limits.

RESULTS:

Of the 568 articles identified, 75 were assessed for eligibility and 43 were finally included and weighed for an in-depth analysis according to their ponderation. The reviewed studies show a wide use of sensors to capture raw data for subsequent motion analysis.

CONCLUSION:

As the volume of the data captured via these sensors increase, it makes sense to extract useful information about them such as prediction of performance scores, detection of movement impairments and measured progression of recovery.
Day surgery appointment scheduling with patient preferences and stochastic operation duration
Authors: Wu Qianyun , Xie Naiming , Shao Yuting
Published: December 2020

BACKGROUND: Due to its fast service and high utilization, day surgery is becoming more and more important in the medical system. As a result, an effective day surgery scheduling can reasonably release the supply and demand pressure. OBJECTIVE: This paper aims to investigate the day surgery scheduling problem with patient preferences and limited operation room for the sake of increasing operation efficiency and further decreasing surgery costs. METHODS: A multiple objective stochastic programming model is constructed to seek a satisfactory surgical scheduling for both patients and hospitals under different scenarios. Multi-objective genetic algorithm is designed to solve the model and different scales of scenarios are utilized to test the effectiveness of the algorithm and modeling process. RESULTS: Results show that the proposed model and algorithm can provide a feasible solution for maximizing individual preference of surgeons with surgery date and operation room utilization as well. CONCLUSIONS: Patient preference is proposed to be incorporated into day surgery scheduling, and the variability of surgery duration considered to seek a satisfactory surgery scheduling scheme for both patients and hospitals is more in line with the actual hospital situation.
Human-robot coupling dynamic modeling and analysis for upper limb rehabilitation robots
Authors: Xie Qiaolian , Meng Qiaoling , Dai Yue , Zeng Qingxin , Fan Yuanjie , Yu Hongliu
Published: December 2020

BACKGROUND: Upper limb rehabilitation robots have become an important piece of equipment in stroke rehabilitation. Human-robot coupling (HRC) dynamics play a key role in the control of rehabilitation robots to improve human-robot interaction. OBJECTIVE: This study aims to study the methods of modeling and analysis of HRC dynamics to realize more accurate dynamic control of upper limb rehabilitation robots. METHODS: By the analysis of force interaction between the human arm and the upper limb rehabilitation robot, the HRC torque is achieved by summing up the robot torque and the human arm torque. The HRC torque and robot torque of a 2-DOF upper limb rehabilitation robot (FLEXO-Arm) are solved by Lagrangian equation and step-by-step dynamic parameters identification method. RESULTS: The root mean square (RMS) is used to evaluate the accuracy of the HRC torque and the robot torque calculated by the parameter identification, and the error of both is about 10%. Moreover, the HRC torque and the robot torque are compared with the actual torque measured by torque sensors. The error of the robot torque is more than twice the HRC. Therefore, the HRC torque is more accurate than the actual torque. CONCLUSIONS: The proposed HRC dynamics effectively achieves more accurate dynamic control of upper limb rehabilitation robots.
COMPARATIVE ANALYSIS OF COMPLICATIONS IN PATIENTS AFTER INDIVIDUAL ONCOLOGICAL AND MODULAR ONCOLOGICAL ENDOPROSTHETICS OF THE KNEE JOINT WITH TUMOR LESIONS
Authors: Бур’янов Олександр , Біштаві Обада Муххамад , Проценко Володимир
Published: December 2020

The article contains analysis of complications after individual oncological knee joint endoprosthesis replacement in cases of tumor lesions. Complications were observed in 45 ,8% of cases after knee joint endoprosthesis replacement operations with tumor lesions. The main complications that were observed included infectious ones: 18,1%, aseptic instability of the endoprosthesis stem:  16,7%, bone fracture at the site of endoprosthesis stem implantation: 6,9%, destruction of the endoprosthesis structure: 4,2%. The factors that led to complications, as well as methods of their elimination are given. Dialysis and a long course of antibiotic therapy or the installation of a metal-cement spacer device followed by repeated endoprosthesis replacement is advised in case of an infectious complication. Repeated joint endoprosthesis replacement with replacement of only one (loose) component of the endoprosthesis, using a long intramedullary stem or replacement of the total endoprosthesis is advised in case of aseptic instability of the endoprosthesis stem. Metallic osteosynthesis of the  periprosthetic bone fracture is performed using bone plates  and cable grip in cases of bone fracture at the site of endoprosthesis stem implantation. Repeated joint endoprosthesis replacement is effected with replacement of the entire endoprosthesis structure in case of destruction of the endoprosthesis structure.
ACCOUNTABILITY COMO FERRAMENTA DE DESENVOLVIMENTO, CIDADANIA E CONTROLE SOCIAL
Authors: Stroparo Telma Regina , Stroparo Marina
Published: December 2020

A obrigatoriedade de transparência nos atos da administração pública relaciona-se ao conceito de accountability, palavra de origem inglesa e sem tradução para o português, mas que hodiernamente tem sido associada à obrigação dos administradores públicos, enquanto gestores da coisa pública, em prestarem contas de suas ações e de por elas se responsabilizarem, perante a sociedade. A relação entre accountability, transparência e desenvolvimento territorial é importante, pois permeia a responsabilidade dos agentes públicos na correta aplicação de recursos públicos em ações que se traduzam em efetividade e responsabilidade social. Por outro lado, tem-se uma sociedade mais atuante e crítica que observa, analisa e exige não só a aplicação efetiva dos recursos públicos, como também a transparência dos atos da administração pública. Desenvolvimento territorial passa, indubitavelmente, pelos dois enfoques: aplicação dos recursos públicos e transparência dos atos e consequente diminuição da pobreza, melhoria na qualidade da vida da população abrangida pelos programas/ações, acesso aos programas sociais, às políticas de trabalho e renda, dentre outros. Nesse sentido, a presente pesquisa classifica-se, metodologicamente, em exploratória e descritiva e, quanto aos objetivos, em bibliográfica e documental. Propõe o levantamento e análise do nível de transparência dos atos públicos, relacionados à área de promoção social, trabalho e renda, disponíveis nos Portais de Transparência dos municípios que compõe a Associação dos Municípios do Centro Sul do Paraná (AMCESPAR). A amostra é composta pelos dez municípios que compõe a AMCESPAR. Foram coletados dados relativos aos anos de 2014 a 2019. Os dados coletados apontam para o fato de que houve evolução significativa na transparência e divulgação dos atos públicos. No entanto, foram detectadas falhas e/ou falta de transparência nos portais analisados indicando que há um longo caminho a ser desenvolvido quando o assunto é accountability. As informações não são apresentadas de forma detalhada, a linguagem é técnica, a forma disponibilização é confusa e diferente em cada portal.
Informe especial de estabilidad financiera: indicadores internacionales - Segundo semestre de 2020
Authors:   Departamento de Estabilidad Financiera
Published: December 2020

En este informe se analizan los principales indicadores financieros de Centroamérica y República Dominicana, algunos países de América del Sur y México. Con el fin de evaluar la situación de los establecimientos de crédito de la región, se tienen en cuenta el comportamiento de la cartera, la gestión del riesgo, la rentabilidad y la eficiencia para el periodo comprendido entre junio de 2019 y el mismo mes de 2020.
Informe especial de estabilidad financiera: riesgo de mercado - Segundo semestre de 2020
Authors:   Departamento de Estabilidad Financiera
Published: December 2020

El propósito del presente informe es medir la transmisión de volatilidad que existe entre los mercados de deuda pública, deuda privada y acciones, de manera que se pueda identificar si un mercado, en determinado momento del tiempo, fue generador o receptor de volatilidad. Posteriormente, se estima el valor en riesgo (VeR) a un día del portafolio en posición propia de los tres mercados, así como los efectos de una posible materialización del riesgo de mercado sobre el balance de las entidades.
Improving the quality of lecturers at the University of Social Sciences and Humanities, VNU-HCM
Authors: Thi Truc Ngoc Le
Published: December 2020

The quality of education and training is determined by many factors including the quality of human resources, especially teaching staff. They do not only play the role of teachers, experts in the field of expertise, but also are advisors, lecturers who are also leaders in renovating the curriculum and teaching methodology to meet educational goals of the University and the society, etc. However, in addition to the achievements in human resource development, the quality of the teaching staff remains inadequate, failing to meet the needs of the University and the society in the context of globalization. Therefore, to overcome the limitations and improve the quality of education and training, it is urgent to need specific and comprehensive solutions to improve the quality of lecturers at higher education institutions in general and at USSH, VNU-HCM in particular. Therefore, in this article, the author presents: 1/ Some difficulties and limitations in improving the quality of teaching staff at the University of Social Sciences and Humanities, Vietnam National University Ho Chi Minh City; and 2/ Proposing some solutions to improve the quality of USSH lecturers to contribute to improving the quality of education and training to meet the needs of international integration in the current period.
The trend of technology application in tourist behavior
Authors: Thi Van Hanh Nguyen , Huu Binh Nguyen
Published: December 2020

In the context of the digital era, the role of technology in the field of tourism is vital and apparent. Technology has made traveling and tourism easier and more interesting; Internet and mobile devices have changed the way people plan and experience their trips. Tourist behavior is an underlying factor impacting the tourism services development. Understanding tourist behavior becomes prerequisite for tourism policy makers and practitioners, bringing practical values for stakeholders. Study on the impacts of technology on different stages of the travel cycle has been attracting scholars' attention. From the survey of 500 respondents living, studying or working in Ho Chi Minh City, this paper aims at mentioning the trend of applying technology in consume behavior in tourism, indicating level of technology use in different steps of the travel cycle ranging from information searching, booking, experiencing to sharing. The result showed that most of the respondents used technology at different levels in different stages of their travel cycle in which destination information searching and memories capturing were the most popular. Some implications and suggestions were also been indicated.
Formation of general education skills on molecular physics
Authors:   Kazakh national women’s teacher training university, Sandibaeva N. , Aidarbekova A. ,   Kazakh national women’s teacher training university
Published: December 2020

education has set a goal to develop personality traits that are needed for social and value activity of a person in society. It states that knowledge, ability, skills and competencies ensure the achievement of full development of all important qualities of the person. Including the demonstration of physical phenomena allows the teacher to direct the cognitive activity of students in the process of observation and study of phenomena in molecular physics. With the help of physical experiment solve different problems. Physics is an experimental science. With the help of physical experiments, various tasks and learning goals are solved, we will consider the experiments of molecular physics. A number of possible ways for students to learn the laws that take into account the general characteristics of a particular gas and the strength of intermolecular interactions are analyzed. In addition, students study the difference between the van der Waals equation and the Mendeleev-Clapeyron law and make sure that this equation correctly describes the state of real gases.Therefore, the study of gas equations forms students’ complex fundamental concepts, uses the distribution of interrelated levels of knowledge development, which are the most important conditions for their formation and assimilation. The ordering of the basic ideas of molecular physics is of general importance for their mental development, especially for the development of imagination and theoretical thinking. In this regard, mastering the basics of scientific knowledge will undoubtedly contribute to improving the effectiveness of the educational process.
The Role of Leadership and Leaders’ Behavioral Characteristic on Employees: A Study of Petronas Berhad
Authors: Bin Mohd Farid Muhammad Aiman , Kee Daisy Mui Hung , Bin Mohamad Muhammad Saifulhaq , Bin Hameem Muhammad Sharizul Ukasha , Bin Zulkafli Ahmad Zulfahmi
Published: December 2020

Petronas Chemical Group is one of the largest and most popular companies in Southern Asia primarily involved in marketing, manufacturing, and selling diversified ranges of chemical products. The main purpose of this research paper is to determine the role of leaderships and leaders’ behavioral characteristic on employees of Petronas Chemical Group. This study focuses on types of leadership its leaders assert in the working environment to sustain the development of their employees’ performance. This study may strengthen the understanding of the role of leadership or leadership style that will chip in employee job performance.
GASTROESOPHAGEAL REFLUX DISEASE DIAGNOSIS AND TREATMENT
Authors: Hassan Khaled
Published: December 2020

It remains a challenge to diagnose and treat gastro-esophageal reflux (GER) and GER disease (GERD) in infants and children. Together with Embase, MEDLINE, and the Cochrane Database, the published guidelines and position papers were reviewed and summarized in order to suggest a realistic GER and GERD strategy and management for healthcare providers and to standardize and enhance the quality of care for infants and children. Two algorithms were developed for this purpose, 1 for infants <12 months of age and the other for older children. None of the signs and symptoms of GER and GERD are unique and there is no screening test or tool for a gold standard. As a first-line approach, nutritional management is recommended in babies, while for early management, a clinical trial with antacid medication is recommended in children. The aim of the realistic recommendations of this review is to optimize GER management in infants and older children and to minimize the number of investigations and the improper use of medication.

Keywords: Gastro-esophageal reflux, Gastroesophageal reflux disease, Esophagitis, Endoscopy, Impedance, Proton pump inhibitors, pH.
SOCIO-DEMOGRAPHIC PROFILE IN PREECLAMPSIA
Authors: Amrita Kumari , Asha Verma , Monika Bajiya , Anil Gurjar , Poonam Muhal
Published: December 2020

Background: Pre-eclampsia is a complex multisystem condition. It affects 3-5% of all prenancies.It is defined as new onset hypertension after twenty weeks of pregnancy plus involvement of at least one organ system-renal, hepatic, neurological, hematological, pulmonary or cardiac system or as utero-placental dysfunction

Methods: This was a hospital based comparative analytical cross sectional study carried out over 2 years period from may 2019 in the Department of Obstetrics and Gynecology, SMS Medical College and attached hospitals, Jaipur.

Results:  The mean age of cases (27.36 ± 3.66 years) was higher than the controls (23.43 ± 3.23 years). There was not much difference in the distribution of subjects according to residence. In the study group 26 (57.78%) women belonged to urban areas and 19 (42.22%) belonged to rural areas whereas in the control group, 26 (62.22%) women belonged to rural areas and 17 (37.78%) belonged to urban areas. There were more primigravida in pre eclamptic group compared to the control group.

Conclusion: Identification of risk factor in the antenatal period helps in early detection of women who are at high risk of developing pre-eclampsia in order to reduce maternal morbidity and mortality.

Keywords: Preclampsia, Age, Gravida
Algorithmic Support of Adaptive Automatic Control Systems with Data Compression
Authors: Alekseev V. V. , Antonyuk E. M. , Varshavskiy I. E.
Published: December 2020

Introduction. The exponential growth of measurement information caused by ongoing complication of technical and production facilities necessitates the development of improved or brand new information and measurement systems, including those performing adaptive automatic control functions. Automatic criteria-based selection and reduction of measurement information continuously supplied by multi-parameter sources characterizing the objects under study require algorithms ensuring reconfiguration of automatic control systems during operation. In comparison with automatic control systems based on time-division channelling, the considered adaptive systems provide timely information on the pre-emergency and emergency operation of a facility.

Aim. To develop an algorithmic support for adaptive automatic control systems using asynchronous-cyclic and parallel-sequential operating algorithms, as well as to compare the proposed algorithms in terms of their, control reliability, compression ratio, operation speed and the error associated with multi-channelling.

Materials and methods. The algorithms proposed for supporting the operation of adaptive systems were developed on the basis of queuing theory and simulation modelling using the MatLab/Simulink programming languages, C++.

Results. The developed algorithmic support for automatic control systems based on asynchronous-cyclic analysis of deviations allows the amount of redundant information to be reduced by more than 4 times and the operation speed to be increased by 1.5 times. The developed algorithmic support for automatic control systems based on parallel-sequential analysis of deviations allows the error associated with multi-channelling to be reduced by 1.4 times, thereby bringing the control reliability of such systems closer to that of continuous-control systems. An analysis of the graphs of the error associated with multi-channelling showed that the automatic control systems based on parallel-sequential operational algorithms are invariant to the law of distribution of input quantities, compared to the systems based on asynchronous-cyclic operational algorithms.

Conclusions. The proposed algorithmic support can significantly decrease the redundancy of information and improve the metrological characteristics of automatic control systems. The use of the developed algorithms in automatic control systems based on time-division channelling render their control reliability comparable with that of continuous-control systems.
Application of Option Pricing Framework for Analyzing and Predicting Stock Prices in Energy Markets
Authors: Okhuese Victor Alexander , Aduda Jane Akinyi , Mung'atu Joseph
Published: December 2020

In this study, the evaluation of the pricing framework for predicting West Texas Intermediate crude oil stock was implemented where detailed analysis with varying changepoint shows that an arbitrage-free forward price can be derived from the buy-and hold strategy in the energy market thereby enabling investors in the market willing to be salvage from the market uncertainties as well as Arrow-Debreu situations to execute a spot or forward contracts depending on the time and place the market becomes favorable.
Dual Band Octagonal Microstrip Patch Antenna Loaded with Array of Split Ring Resonators
Authors: Selas A. Sureka , Ayyappan K.
Published: December 2020

This article presents a proposal about an octagonal microstrip patch antenna (MPA) loaded with Split Ring Resonators (SRR) the antenna’s ground part. The antenna size reduction using multiband radiators will suits for miniaturization of day-to-day handheld devices. The dual band behaviour of the antenna will integrate more communication standard in one system which saves the installation space in the device. In this context, an octagonal antenna structure is conceived for a dual operational frequency of 5.63 GHz and 5.97 GHz. Hereby, a Co-planar Waveguide (CPW) structure is adapted to the octagonal patch and the structure has been observed by simulation analysis under HFSS platform. The overall geometry of the antenna is 30 x 26 x 1.6 mm3. The antenna feed using a microstrip for earning a better impedance matching between the antenna and transmission line. The antenna design provides a wider bandwidth of 580MHz and average gain of 3.25 dBm. The attainment of dual band operational frequencies is due to the CPW and SRR structure in the antenna design.
Biochemical Methane Potential (BMP) of Market Wastes from Nairobi Inoculated with Dagoretti Slaughterhouse Waste
Authors: J. K Mbugua , D. N Mbui , J. M Mwaniki , F. B Mwaura
Published: December 2020

Background: Anaerobic degradation entails the conversion of substrate organic matter to biogas. A wide variety of substrate has been employed. The biochemical methane potential of twenty market wastes was investigated using rumen fluid inoculum.
 Experimental: The proximate properties like carbohydrates, crude proteins, crude lipids, fibre, and moisture levels were determined using standard procedures. The physio-chemical analysis was done to investigate the ash, total solids and volatile matter content. The substrates biogas production capacity based on elemental composition, COD, organic fraction composition was investigated. However, the BMP experiments were carried out at mesophillic conditions.
 Results: The total biogas production was in the range of 1000 to 3500ml, with a methane composition of 56 – 60%. The biodegradability of the substrates ranges from 71 to 94%, subject to the lignin levels.
 Conclusion: The BMP studies are vital in assessing the methane potential of the substrate without carrying out the experiments.
Single Phase AC to DC Isolated ZETA Power Factor Correction Converter fed LED drives
Authors: Siddharthan S. T. , Jones Andrew , Kathikeyan S.
Published: December 2020

This paper deals with PFC-isolated Zeta converter fed LED drive to overcome the power factor problems. The proposed circuit topology consists of diode bridge rectifier and isolated Zeta converter with high frequency transformer. A single –phase supply is used to feed a DBR followed by a filter to avoid any switching ripple in DBR and the supply system. An isolated Zeta converter is operated to work under DCM mode. This combination of DBR and PFC converter is used to feed a LED drive. This converter is simulated in MATLAB platform. This converter provides better results such as unity power factor and less current harmonic distortion.
Spor Bilimleri Fakültesi Öğrencilerinin Bilgisayar Kullanma Becerileri ve Teknolojiye Yönelik Tutumlarının İncelenmesi
Authors: ÜZÜM Hanifi , ASLAN Mehmet , YÜKSEL Ahmet Berat , YALDIZ Mustafa , ŞİMŞEK Merve , ORAK Muzaffer Emir
Published: December 2020

Bu çalışmanın amacı, spor bilimleri fakültesi öğrencilerinin bilgisayar kullanma becerileri ve teknolojiye yönelik tutumlarını incelemektir. Genel tarama modellerinden biri olan anlık tarama yaklaşımı ve ilişkisel tarama modeline göre dizayn edilen çalışmanın örneklem grubunu 2019/20 öğretim yılı güz döneminde Bolu Abant Baysal Üniversitesi Spor Bilimleri Fakültesi’nde okuyan 348 (145 Kadın, 203 Erkek) öğrenci oluşturmuştur. Araştırmada, veri toplama aracı olarak “Bilgisayar Kullanma Becerileri ve Bilgisayarlara Yönelik Tutum Ölçeği” kullanılmıştır. Verilerin analizinde parametrik testlerden ikili karşılaştırmalarda bağımsız örneklemler T-test, çoklu karşılaştırmalarda tek yönlü varyans analizi One Way Anova-test, ilişki karşılaştırmalarında ise Pearson korelasyon analizinden yararlanılmıştır. Çalışmanın sonuçları genel olarak değerlendirildiğinde, 1. Sınıf ile 3. Sınıf öğrencileri arasında 3. Sınıflar lehine bilgisayar kullanma becerileri arasında anlamlı fark bulunmuştur. Teknoloji kullanımında Antrenörlük bölümü öğrencileri ve Spor Yöneticiliği bölümü öğrencileri arasında Antrenörlük öğrencileri lehine anlamlı bir fark bulunmuştur. Elde edilen bu sonuçlara göre spor bilimleri fakültesi öğrencilerinin bilgisayar kullanma becerileri ve teknolojiye yönelik tutumlarının geliştirilmesi, fakültedeki mevcut olanakların iyileştirilerek, okullardaki kullanım düzeylerinin gerekli olan yeterlik düzeyinde geliştirilmesinin gerekli olduğu düşünülmektedir.
Cytoglobin expression in rat kidney during exposure to systemic chronic hypoxia
Authors: Daruningrum Ika Superti , Prijanti Ani Retno , Mudjihartini Ninik , Sadikin Mohamad , Jusman Sri Widia A
Published: December 2020

Background:  The kidneys in physiological conditions are always in a state of relative hypoxia. Cytoglobin (Cygb) is the newest globin protein found of the globin family. One of the functions of Cygb is in oxygen supply. Cygb expression is found to increase in hypoxic conditions, which are thought to be an adaptation response to hypoxia.  

Objective: This study aimed to analyze the expression of Cygb in rat kidneys which were exposed to chronic systemic hypoxia.

Methods: Twenty five male Sprague-Dawley rats, weighing 150-200 g were used in this experiment. Rats were divided into 5 groups: The control group was exposed to normoxia; the hypoxia groups (10% oxygen / 90% nitrogen) for 1 day; 3 days; 7 days and 14 days. After treatment, rats were sacrificed and their kidneys were taken. Cygb mRNA expression was measured by qRT-PCR, while Cygb protein expression was measured by the ELISA method.

Results: The expressions of Cygb mRNA and protein were found to be highest on day 3 of hypoxia and was correlated very strongly and significantly (r2 = 0.96; p <0.05).

Conclusion: The highest expression of Cygb on day 3 of chronic systemic hypoxia exposure is suggested as an attempt to restore oxygen supply to the kidneys.
Effect of Watering Frequency on The Growth and Yield of Oyster Mushrooms (Pleurotus ostreatus)
Authors: Saputera Agus , Sofyan Antar , Saputra Riza Adrianoor , Sari Noorkomala
Published: December 2020

Oyster mushrooms have the conditions of growing at low temperatures and high relative humidity, so when you want to cultivate it is needed an appropriate environment for the growth and development of oyster mushroom. Banjarbaru City tends to have high temperatures with a relative humidity that tends to below. This is quite different from the requirements for growing oyster mushrooms which require low temperatures with relatively high humidity. One of the easiest and cheapest methods to maintain temperature and relative humidity to remain ideal and appropriate is to water the surrounding oyster mushrooms growing media, so knowledge of the most appropriate and ideal watering frequency for growth and development of oyster mushrooms is needed. The environmental design used was a Completely Randomized Design (CRD), a single factor with 4 treatments, 5 replications, so that 20 experimental units were obtained. The treatments are p1 = once watering per day, p2 = twice watering per day, p3 = three times watering per day, p4 = four times watering per day. The result showed that the watering frequency showed significant difference to the growth time of oyster mushroom shoots and the wet weight of oyster mushrooms. The best treatment in accelerating the growth time of oyster mushroom shoots and increasing the wet weight of oyster mushrooms is four times watering frequency per day.
Potential Analysis of Agricultural Sector in East Java with Klassen Typology Approach Method and LQ (Location Quotient) Year 2014-2017
Authors: Anggraini Okta Risky
Published: December 2020

The agricultural sector is a sector that supports the lives of most Indonesians. Therefore, the agricultural sector in Indonesia needs to continue to be developed in line with population growth and technological advancements to increase agricultural production. The production of agricultural products plays an important role in development, especially to meet domestic food consumption and also increase export income in Indonesia. Also, the agricultural sector is strategic in the structure of national economic development. Therefore, this research discusses the analysis of typology class and LQ analysis which is used as a reference in the development of the agricultural sector in East Java so that it can play a maximum role in increasing the GRDP of East Java in particular and the National GDP in general
FORMATION OF AN OPEN INNOVATION MODEL IN THE CONDITIONS OF DIGITAL TRANSFORMATION OF SOCIETY
Authors: Bazetska H. , Yesina V. , Pushkar T.
Published: December 2020

The active development of globalization and the formation of the information society contribute to the transformation of approaches to innovative activities. The purpose of the article is to consider the formation of an open innovation model in the modern information space. The latest approaches to the openness of knowledge, the creation of platforms for the development of open science, the tendency to increase the openness of research processes are reflected in the concept of open innovation.
The model of open innovation provides a new cycle of creation and implementation of an innovative product. This model involves the active use of information about innovative products from the outside, increasing the availability of such information. The open innovation model determines not only the active use of external sources of innovation, but also provides for the increase in the openness of their own developments and the willingness of companies to the fact that at any stage innovation can go beyond the company and be implemented by other business structures. In the EU countries, the concept of open innovation is reflected in the principles defined in the European policy for knowledge transfer and open innovation. The new paradigm of innovations "Open Innovation 2.0" of the EU is the basis for the formation of their model in Ukraine. "Open Innovation 2.0" is based on the model of four spirals, where government, industry, academia and citizens work together to create the future together and carry out structural changes. Knowledge transfer, ecosystem approach, development of structures and mechanisms for exchange of information and experience are identified as the main tools for the development of open innovation.
It is defined in the article that the active participation of the country in the European Open Science Cloud and the European Cloud Initiative are important stages in the development of the open innovation model in Ukraine. The European Open Science Cloud is Europe's virtual environment for all researchers to store, manage, analyze and reuse data for research, innovative and educational tasks. The European Open Science Cloud and the European Cloud Initiative are elements of integration into the European Research Area as a basis for access to new knowledge and increasing their openness.
The development of the information society in Ukraine contributes to the formation of conditions for the implementation of the main components of the open innovation model defined by the European policy of knowledge transfer and open innovation. The transition to a new perception of innovation, the use of all opportunities to obtain new knowledge in the open scientific space, active participation in the system formation processes for open knowledge transfer in the EU can create a solid foundation for innovative changes in the national economy.
INDICATORS OF EVALUATION OF EFFICIENCY OF DEVELOPMENT OF HOTEL ENTERPRISES
Authors: Shemet M. , Kolontaievskyi O.
Published: December 2020

The purpose of the article is to determine the system of indicators for assessing the effectiveness of hotel enterprises. It is determined that the main criterion of the value of the investment project is the criterion of net discounted income. It is noted that the modified internal rate of return (MIRR) eliminates the lack of internal rate of return of the project, which occurs in the case of repeated outflows.
It is noted that today there is no single approach to assessing the effectiveness of investment in hotel enterprises in accordance with the forms of ownership and their size, which is due to the need to ensure compliance with performance evaluation criteria and a system of indicators.
Statistical and dynamic indicators of investment evaluation are considered
Indicators are analyzed: simple (accounting) rate of return on the project (ARR), payback period (PP)
Performance indicators taking into account the time factor are considered: discounted payback period (DPP), net discounted income (NPV), discounted profitability index (DPI), internal rate of return (IRR) and some others.
The disadvantage of the discounted payback period has been identified - it does not take into account subsequent cash inflows, and therefore may serve as an incorrect criterion for the attractiveness of the project.
The main advantages of static and dynamic indicators of investment project efficiency assessment are determined.
It is noted that one of the main criteria of investment advantage of a project is profit maximization.
Break-even analysis allows you to calculate the volume of sales at which the company's income equals costs.
It is proposed to use the indicator modified internal rate of return (MIRR)
It is determined that the most popular methods of assessing the effectiveness of the investment project today are the definition of such static indicators as simple rate of return, simple payback period and dynamic indicators, namely: discounted payback period, net present value, profitability index, internal rate of return and modified internal rate profitability. The most accurate results are given by dynamic indicators, as they take into account the value of money over time. Although dynamic methods are more accurate, all the considered methods of evaluating the effectiveness of the investment project have their pros and cons.
The Effect of Lactobacillus salivarius SGL03 on Clinical and Microbiological Parameters in Periodontal Patients
Authors: NĘDZI-GÓRA MAŁGORZATA , WRÓBLEWSKA MARTA , GÓRSKA RENATA
Published: December 2020

The destruction of periodontal tissues during periodontitis is the result of the immune-inflammatory reactions to the bacteria of dental biofilm. Probiotics may reduce dysbiosis by the modification of the dental microbiome, which can influence the immune-inflammatory mechanisms. The aim of this study was to estimate the clinical and microbiological parameters, before and after 30 days of application of the dietary supplement containing Lactobacillus salivarius SGL03 or placebo. The study was conducted in 51 patients with stage I or II periodontitis during the maintenance phase of treatment. The clinical parameters and the number of colony forming units (CFU) of bacteria in supragingival plaque were assessed before and after 30 days of the oral once daily administration of the dietary supplement in the form of suspension containing L. salivarius SGL03 or placebo. There were no changes in the PI scores between and within the groups. The value of BOP decreased in both groups. In the study group the significant reduction of the mean pocket depth was revealed (from 2.5 to 2.42, p = 0,027) but without the difference between the groups. There were no significant changes in the number of bacteria within the groups. In the control, but not the study group, positive correlations were observed between the clinical parameters (variables) and the number of bacteria. The use of the dietary supplement containing L. salivarius SGL03 may reduce pocket depth despite the lack of changes in other clinical parameters and the number of bacteria in supragingival plaque.