bluuebunny/crossref_metadata_2025 huggingface dataset:
Estudos do Lazer e Geopolítica do Conhecimento
Authors: Gomes Christianne Luce
Published: August 2020

Este artigo objetiva analisar a temática do lazer na perspectiva da geopolítica do conhecimento. Considerando que o espaço físico é um espaço político e social repleto de dimensões simbólicas, na dinâmica global os estudiosos latino- americanos ocupam, geralmente, a posição de receptores/consumidores dos conhecimentos produzidos em outras partes do mundo, principalmente na Europa e nos Estados Unidos, disseminando-os como se as teorias e conceitos fossem universais. O conhecimento produzido em diferentes países pode ser útil e necessário para pensar o lazer em nosso contexto, mas, os saberes não devem ser tratados como neutros e universais, nem serem assumidos e incorporados de forma descontextualizada e destituída de um posicionamento crítico quanto a sua validade e pertinência.
ETNOMETODOLOGI PRICE SETTING PADA WARUNG MAKAN MBA CITRA
Authors: Ismail Juniaty
Published: August 2020

Tujuan studi ini adalah untuk menyelidiki bagaimana cara menentukan harga penjualan pada warung makan Mba Citra yang  sebagai pemilik sekaligus pegelolanya, Mba Citra dan Suaminya Mas Djarwo yang menerapkan kearifan budayanya sebagai orang Jawa dalam kehidupan sehari-harinya terutama dalam kegiatan usaha warung makannya yang didirikan sejak tahun 90-an. Studi ini menggunakan pendekatan etnomethodology. Studi menunjukkan bahwa dalam penetapan harga atau price setting pada warung makan ini, tidak seperti warung makan lainnya yang menginginkan keutungan yang sebesar-besarnya, tetapi pengelolanya lebih mengutamakan niat untuk menolong memenuhi kebutuhan pokok pelanggannya  yang didominasi oleh anak-anak kos.Kata kunci: Kultur Jawa, Price Setting, Warung Makan, Etnometodology
LIGHT SCATTERING SENSOR FOR RAPID DETECTION OF BACILLUS CEREUS IN CHICKEN MEATS
Authors: Abdalhaseib Maha , Bhunia Arun
Published: August 2020

Bacillus cereus is an opportunistic pathogen causing food poisoning, manifested by diarrhea or emetic illnesses. BARDOT (BActerial Rapid Detection using Optical scattering Technology) directly capturing phenotypic CHARacteristics of colonies following standard agar plating, providing non-destructive, high-throughput analysis and real-time detection of colonies on agar plate without any labeling reagents or probes. This study implement light scattering sensor in detection and identification of B. cereus on genus level in mixed cultures and in artificially inoculated chicken samples using PRM (phenol red mannitol) agar. Software analysis and PCR confirmation showed that BARDOT successfully detect 100% of B. cereus in mixed culture and >90% of artificially inoculated chicken samples. This results demonstrates that BARDOT could be used as a screening tool to identify Bacillus cereus from other pathogens and background flora on PRM agar
ALTERATIONS IN SOME BIOCHEMICAL PARAMETERS IN CATTLE AFFECTED WITH FOOT AND MOUTH DISEASE IN DAKAHLIA GOVERNORATE, EGYPT
Authors: Kamal Eman , Salama MOhamed , Elgamal Ahmed , Heakal Nabil
Published: August 2020

This study was carried out to evaluate the changes in serum biochemical parameters during foot and mouth disease (FMD) viral infection, so blood samples were collected from different farms in Dakahlia Governorate during the outbreak of the disease in 2016. Blood samples were collected after complete clinical and physical examination of twenty five cattle; their ages were ranging from 1-2 years and divided into two groups as follows: 15 cattle were showing the clinical signs of the disease and 10 cattle were clinically healthy (control group). The obtained results showed a significant increase in glucose level (P<0.01), non-esterified fatty acids (NEFA) (P<0.001), beta hydroxyl butyric acid (BHBA) (P<0.001) and lipase enzyme (P<0.01) in infected cattle compared to control group. On the other hand, serum insulin concentration and amylase were significantly lower in blood of infected cattle than control group (P<0.001) and (p<0.01) respectively. from the obtained results it could be concluded that FMD infection in cattle is associated with hyperglycemia, hypoinsulinemia and ketosis
ГЕНДЕРНА ОСВІТА У ПІДГОТОВЦІ СОЦІАЛЬНИХ ПРАЦІВНИКІВ
Authors: Карагодіна Олена , Семигіна Тетяна
Published: August 2020

Гендерна освіта відіграє важливу роль у формуванні професійних компетентностей соціальних працівників. У статті окреслено контекстуальні чинники, що впливають на вибір підходів до конструювання гендерно чутливої професійної підготовки з соціальної роботи, а також визначено складові гендерноорієнтованого навчання соціальних працівників у закладах вищої освіти. Визначено екзогенні (зовнішні по відношенню до закладів вищої освіти, тобто фактори широкого контексту) та ендогенні (притаманні закладам вищої освіти, які формують внутрішнє освітнє середовище) чинники. З’ясовано, що ключовою складовою гендерної підготовки соціальних працівників є формування гендерної компетентності, що може відбуватися як шляхом впровадження наскрізних гендерно чутливих підходів, так і через викладання тематичних курсів.
PSYCHOLOGICAL IMPACT OF COVID-19 LOCKDOWN (PHASE 2) AMONG INDIAN GENERAL POPULATION: A CROSS-SECTIONAL SURVEY
Authors: Kaurani Pragati , Batra Kavita , Hooja Himangini Rathore
Published: August 2020

COVID-19 has caused unprecedented disruption of all spheres of life, including health, financial, and socio behavioral. Given the rampant nature of the pandemic, several nations, including India has instituted stringent public health measures, with one being nationwide lockdown, to mitigate COVID-19 transmission. Previous studies reported increased stress and anxiety levels among general population during phase 1 (complete) lockdown, however, the effect of extended lockdown (phase 2) on mental health outcomes remains the subject of investigation till today. Therefore, this cross-sectional study endeavors to assess the psychological outcomes among general population during phase 2 lockdown. The online questionnaire surveyed 627 individuals from the general population using a non-probability snowball sampling technique. Descriptive statistics, including the frequency distribution, mean and standard deviations were generated. Mean differences across groups were analyzed through independent-samples- t and analysis of variance tests. Consistent with previous studies, our results indicated a higher mean score of anxiety and stress among females compared to males. Young adults aged between 21-39 years had the highest mean stress and anxiety scores compared to other categories. The mean anxiety score increased from retired (M=3.96, SD=4.76, to students (M=7.04, SD=7.11), to unemployed (M=9.0, SD=6.53) occupation groups. The findings of this study highlight the need for designing psychosocial regulatory frameworks and suitable interventions to address the needs of those being mentally traumatized by the pandemic and associated lockdowns. The study also advocates for establishing psychological health monitoring and telepsychiatry systems for identifying and treating mental health problems.
ROLE OF DECOMPRESSIVE CRANIECTOMY IN PATIENTS WITH TRAUMATIC INTRACRANIAL HEMATOMAS.
Authors: Nath Amar
Published: August 2020

Aim – The study done to evaluate the role of decompressive craniectomy in patients with traumatic intracranial hematomas.
Introduction - Although decompressive craniectomy for traumatic brain injury is very effective procedure in patients with raised intracranial pressure refractory to medical measures, its effect on clinical outcome is still unclear because of both positive as well as negative impact of procedure. As after decompressive craniectomy, clinical outcome becomes mainly dependent on primary head injury as secondary injury is prevented by decompressive craniectomy and beneficial effect of decompressive craniectomy is partially neutralized by complications associated with it to a small but significant extent.
Patients and method - we retrospectively analysed 72 patients operated in last five years for traumatic intracranial hematomas by decompressive craniotomy. We followed practice of large craniotomy and evacuation of hematomas in last five years in properly selected patients and reserving craniectomy as second procedure in patients in whom patient did not improve radiologically/clinically after craniotomy.
Results - In 61 out of 72 patients operated by decompressive craniotomy, there has been significant improvement in GCS of patients and none of patients needed decompressive craniectomy.
EFFECTS OF CASUALTY EVACUATION ON PATIENTS OF HEAD INJURY – A RETROSPECTIVE OBSERVATIONAL STUDY
Authors: Carvalho Ajay Sebastian
Published: August 2020

Background: - A lot of patients of head injury are transferred to tertiary care centres for management by neurosurgeons. They are evacuated either by road or air. Many a time these patients arrive in a clinicoradilogical deteriorated state.
Methods: - All patients of moderate and severe head injury that were transferred in from peripheral hospitals for management by Neurosurgeon between Jan 2017 to Dec 2017 were analyzed for their clinical status at the time of evacuation to their clinical status on arrival.
Results:- 20 patients deteriorated, 19 required intervention, one was already intubated and his CT showed only increased edema, of the 19, 11 required surgery, 03 re-surgery, 5 required intubation and no surgery.
Conclusion: - Neurosurgeons are not available at all hospitals thereby leading to the early evacuation of the patients. The frequent movements and travelling either by road or air can have fluctuations in the ICP and hypoxia/hypotension/hyper-hyothermia during travelling can aggravate secondary insult to brain. Although what effect these ICP fluctuations have on the brain is not confirmed but these are better avoided.
Electronic Properties of Hydrogenated Hexagonal Boron Nitride (h-BN): DFT Study
Authors: Chettri B. , Patra P. K. , Srivastava Sunita , Lalhriatzuala  , Zadeng Lalthakimi , Rai D. P.
Published: August 2020

In this work, we have constructed the hydrogenated hexagonal boron nitride (h-BN) by placing hydrogen atom at different surface sites. The possibility of hydrogen adsorption on the BN surface has been estimated by calculating the adsorption energy. The electronic properties were calculated for different hydrogenated BNs. The theoretical calculation was based on the Density Functional Theory (DFT). The electron-exchange energy was treated within the most conventional functional called generalized gradient approximation. The calculated band gap of pure BN is 3.80 eV. The adsorption of two H-atoms at two symmetrical sites of B and N sites reduces the band gap value to 3.5 eV. However, in all other combination the systems show dispersed band at the Fermi level exhibiting conducting behavior. Moreover, from the analysis of band structure and Density Of States we can conclude that, the hydrogenation tunes the band gap of hexagonal boron nitride.
Optimization of Quality of Experience for Video Traffic
Authors: qadir qahhar muhammad , Kist Alexander A. , ZHANG ZHONGWEI
Published: August 2020

The rapid shift toward video on-demand and real time information systems has affected mobile as well as wired networks. The research community has placed a strong focus on optimizing the Quality of Experience (QoE) of video traffic, mainly because video is popular among Internet users. Techniques have been proposed in different directions towards improvement of the perception of video users. This paper investigates the performance of a novel cross-layer architecture for optimizing the QoE of video traffic. The proposed architecture is compared to two other architectures; non-adaptive and adaptive. For the former, video traffic is sent without adaptation, whereas for the later video sources adapt their transmission rate. Both are compared in terms of the mean opinion score of video sessions, number of sessions, delay, packet drop ratio, jitter and utilization. The results from extensive simulations show that the proposed architecture outperforms the non-adaptive and adaptive architectures for video traffic.
Refi ning of nickel alloys using foam ceramic fi lters
Authors: Demchenko A.I. , Shevyakov V.F. , Korovin V.A. , Belyaev S.V. , Gushchin V.N. , Leushin I.O.
Published: August 2020

It is shown that fi ltration of nickel alloy by ceramic foam fi lters is effective way to reduce the number
of non-metallic inclusions. Features of fi ltration refi ning of KhN45MVTYuBR alloy are studied. The effect of fi ltration
refi ning on the microstructure and the chemical composition of the alloy is studied. The prospects for application
of ceramic foam fi lters to improve the microstructure of the alloy KhN45MVTYuBR are shown.
Reframing New Zealand’s Biosecurity Conversation Post-Covid-19: An Argument for Integrating Interspecies Concerns
Authors: McDonald Deidre Ann
Published: August 2020

This article began in March 2020, during New Zealand’s Alert Level 4 lockdown, and the writing process has spanned more than five months of the SARS-CoV-2 (COVID-19) pandemic. As at August 2020, COVID-19 continues to rage across the globe, while New Zealanders enjoy a relative freedom of movement. Due to a collective commitment to biosecurity practices such as isolation, quarantine and movement restrictions, along with the government’s strong public health messaging, the ‘team of five million’ had, at the time of writing, eliminated COVID-19 from our communities. This article discusses New Zealand’s biosecurity messaging in light of COVID-19, and argues that biosecurity discussions that link animal management practices with risks to human health are essential for pandemic preparedness. As a global leader in biosecurity, New Zealand is well placed to make the conceptual shift towards treating public health and biosecurity as a shared concern.
EFEKTIVITAS PEMBELAJARAN PKN TERHADAP PENGEMBANGAN SIKAP NASIONALISME SISWA DI KABUPATEN MANGGARAI
Authors: Wendelinus Dasor Yohanes
Published: August 2020

The purpose of this study was to determine the extent of the effectiveness of PKN learning towards the development of student nationalism in Manggarai Regency. By knowing the effectiveness of PKN learning, the government and educational institutions should specifically pay attention to the whole process of organizing learning. This type of research used in this research is descriptive qualitative conducted in schools from elementary school to high school in Manggarai Regency, East Nusa Tenggara. Data collection techniques in this study were observation and questionnaire. Data analysis techniques include the analysis of student responses and activities. Based on the results of research students in Manggarai Regency have an attitude of nationalism known thanks to the learning PKN obtained during their education. The spirit of student nationalism is reflected in the attitude of creating harmony in religious life, upholding the law, being active in national development and feeling proud as an Indonesian citizen.
REFORESTASI BANGKA POA OLEH ANAK WASO COMMUNITY (AWAS.COM) DI WILAYAH ADAT GENDANG WASO, MANGGARAI (Sebuah Riset Sosial)
Authors: Tapung Marianus , Max Regus  , Inosensius Sutam  , Marsel R. Payong  , Marianus S. Jelahut
Published: August 2020

The effort to maintain the balance of the natural environment is the responsibility of all humans on earth. The Waso Community (Anak Waso Community, AWAS.com) and the Waso indigenous community have been trying to carry out their responsibilities by carrying out reforestation activities for three years. To see the extent of these efforts carried out and get its impact, it is necessary to do social research. The main objective of this social research is to observe and evaluate comprehensively the steps of the Waso children's community in carrying out reforestation activities for three years in the Bangka Poa region, as well as the impact of the activities carried out. To describe the efforts of the Awas.Com community in protecting the environment, researchers conducted social research carried out using the Planning, Organizing, Acting, Impact (POAI) method. The research results illustrate that this reforestation activity has shown a positive impact in the form of the recovery of the natural conditions of the Bangka Poa region and the stable water debit in several springs. The research study also looks at and evaluates that reforestation activities for three years in a row have had a direct or indirect impact on the growth and development of ecological, sociological, economic and religious awareness and responsibilities in the community and Waso young generation.
Multifunctional biodegradable polymer/clay nanocomposites with antibacterial properties in drug delivery systems
Authors: Rapacz-Kmita Alicja , Szaraniec Barbara , Mikołajczyk Maciej , Stodolak-Zych Ewa , Dzierzkowska Ewa , Gajek Marcin , Dudek Piotr
Published: August 2020

Purpose: The aim of this study was to investigate the possibility of intercalation of gentamicin and neomycin in montmorillonite (MMT) nanofillers, as well as to study the in vitro antimicrobial properties of nanocomposite films containing a small amount of thus obtained nanofillers. Methods: The polylactide matrix (PLA) nanocomposite films with drug-intercalated montmorillonite fillers were obtained by casting after intercalation of drugs in aqueous solutions. The efficiency of intercalation has been confirmed by X-ray diffraction (XRD) and Zeta potential measurements. The materials were studied for surface wettability, roughness and mechanical properties during 6 weeks of incubation in phosphate buffer saline, and their bactericidal activity was tested against Escherichia coli bacteria before and after 6 weeks of incubation in distilled water at 37 °C. The presence of antibiotics during the incubation was monitored by conductivity and pH measurements. Results: The results indicate that nanocomposite polylactide films with montmorillonite filler intercalated with gentamicin and neomycin tend to degrade faster that their counterparts with non-intercalated fillers, which affects their mechanical properties. However, drug intercalation provided an antibacterial activity, which was confirmed by the presence of zones inhibiting the growth of Gram-negative bacteria for both antibiotics. It was also confirmed that the interaction of antibiotics with clay and polimer matrix did not adversely affect this bactericidal effect. Conclusions: Montmorillonite can be successfully intercalated with both gentamicin and neomycin, and then used as active filler for polylactide films having very good antibacterial properties, therefore their use in biomedical applications can be significantly expanded.
Finite element head model for the crew injury assessment in a light armoured vehicle
Authors: Burkacki Michał , Wolański Wojciech , Suchoń Sławomir , Joszko Kamil , Gzik-Zroska Bożena , Sybilski Kamil , Gzik Marek
Published: August 2020

Purpose: The aim of this paper was the development of a finite element model of the soldier’s head to assess injuries suffered by soldiers during blast under a light armoured vehicle. Methods: The application of a multibody wheeled armoured vehicle model, including the crew and their equipment, aenabled the researchers to analyse the most dangerous scenarios of the head injury. These scenarios have been selected for a detailed analysis using the finite element head model which allowed for the examination of dynamic effects on individual head structures. In this paper, the authors described stages of the development of the anatomical finite element head model. Results: The results of the simulations made it possible to assess parameters determining the head injury of the soldier during the IED explosion. The developed model allows the determination of the parameters of stress, strain and pressure acting on the structures of the human head. Conclusion: In future studies, the model will be used to carry out simulations which will improve the construction of the headgear in order to minimize the possibility of the head injury.
A two-stage model of an arteriovenous fistula maturation process
Authors: Jodko Daniel M. , Obidowski Damian S. , Reorowicz Piotr , Jóźwik Krzysztof
Published: August 2020

Purpose: An arteriovenous fistula has been a widely accepted vascular access for hemodialysis, however, a fistula maturation proces is still not fully understood. In the short period of time, right after vein and artery shunting, the physical and biological changes take place mainly in the venous wall. A two-stage modeling method of arteriovenous fistula maturation process was proposed and presented. Methods: The first stage of the maturation was modeled with two-way coupled fluid structure interaction computer simulations. Whereas for the second, biological stage, a model was based on the change in the elasticity of the venous wall due to wall shear stress (WSS) modifications. Results: The relation between stress and radial and circumferential strain, based on Lame’s theory, makes possible to introduce a mathematical model defining modulus of elasticity, averaged WSS, and venous diameter as time functions. The presented model enables one to predict changes in the monitored parameters in the arteriovenous fistula taking place in the time longer than 90 days. Conclusions: We found that probably the majority of fistulas can be assessed to be mature too early, when the adequate blood flow rate is achieved but mean WSS still remains at the non-physiological level (>10 Pa).
THE CORRELATION BETWEEN PSYCHOSOCIAL RISK FACTORS AND WORK PERFORMANCE IN MANUFACTURING INDUSTRY
Authors: Nuruzzakiyah MI  , Ezrin Hani S  , Hanida AA
Published: August 2020

Nature of psychosocial risk as to the unseen hazards in the working population, potentially exposing the workers towards the adverse effect of mental health. Compromising the well- being of mental health could lead to deterioration of work performance. The objective of this study is to analyze the constructed measure of psychosocial risk factors and work performance of manufacturing workers using statistical analysis. Then,  the constructed measure is used to find the correlations between the two factors. A set of the questionnaire is administered to 258 manufacturing workers. The questionnaires were adapted and adopted from Copenhagen Psychosocial Questionnaire (COPSOQ III), NIOSH Generic Job Stress Questionnaire, and Individual Work Performance Questionnaire (IWPQ 1.0) and the instrument were found to be reliable (Cronbach Alpha value  = 0.7 ). After conducting Exploratory Factor Analysis by using Principal Component Analysis, the construct validity to conduct data collection in the manufacturing industry is tested. Using eight factors understudy that already extracted using factor analysis, it is found that there are significant psychosocial risk factors present in the manufacturing industry. As for the association between psychosocial and work performance, it is found that there is a significant association between psychosocial risk factors and work performance. This study is essential to explore the presence of psychosocial risk factors that underlies in the manufacturing industry, which might affect worker performance and well-being. For future research, it is recommended so that this study can be replicated to other manufacturing industry or different types of industries to see the robustness of the developed instruments. At the same time, the issue of psychosocial risk factors and workers' performance also can be identified, and the mitigation can be planned.
HOW WORKPLACE CONDITION AFFECTS HEALTHCARE WORKERS: ASSESSMENT AT TERTIARY HOSPITALS
Authors: Shaik Farid AW  , Ahmad Rasdan lsmail  , Rohayu O
Published: August 2020

Complaint of pain due to work related musculoskeletal disorder at workplace is nothing new.  Nevertheless, in Malaysia, the data leading to this is near to none, when healthcare industry is concerned.  The purpose of this article is to evaluate the current physical condition at red zone of accident and emergency department at selected hospitals and has the current condition contribute to the work-related musculoskeletal disorder among healthcare personnel. The study is conducted at five red zones of accident and emergency department of Malaysia tertiary hospitals. Before conducting the study, ethical approval has been obtained from ethical committee of Kementerian Kesihatan Malaysia.  Method used in this study is workplace assessment, which allows first-hand experienced to determine and evaluate the real condition of red zone at selected hospitals. Duration of twelve months is required to complete the assessment.  During the workplace assessment, the lighting at red zone (focusing on bed area), the bed space, arrangement of equipment and height of monitors are observed, measured and recorded.  Result show, every red zone is unique with its own layout and design.  There is no standardization among all the red zones involved. Existing guideline for physical condition of red zone of accident and emergency does not exist. Thus, relationship between physical condition of existing red zone and whether it causes work related musculoskeletal disorder must be discussed in length.
NON-INTRUSIVE, VISUAL-LESS WEARABLE HAPTIC STIMULI NAVIGATIONAL ASSISTANCE FOR ELDERLY WITH DEMENTIA
Authors: Rosalam CM  , Faisul AA  , Ruhaizin S  , Khairul MK  , Hassan A  , Indastri S
Published: August 2020

Age is typically affiliated with the decline of cognitive function and the probability to be diagnosed with neurodegenerative disease, namely dementia. Of all dementia-related deficits, the paper highlights on the decline of wayfinding ability, since it is interrelated with mobility, autonomy, caregiving burden and eventually institutionalization. The sense of directions in elderly is also affected by the sensory changes, while the most obvious sensory declines are both vision and hearing. Hence navigation systems that support mainly on visual and auditory may not be the best option for them. A concept of wearable navigational assistance that is non-intrusive and uses haptic stimuli instead of visual and/or audio signals is presented in this paper. A Usability Test (UT) was performed towards the elderly with dementia at a selected nursing home to investigate how they perceive haptic-feedback as a modality of navigation. The assessments involved three phases: (1) orientation or training, (2) navigation test and (3) further navigation test. Results indicate the potential efficacy of haptic modality as a navigation signal. Improvement on subjects’ navigational performance was shown especially during the further navigation test, signifying the familiarization of the intervention. Employing the haptic modality could be a beneficial substitute for navigational purpose when vision and audio are less appropriate. Nevertheless, as much as the encouraging outcomes from the results and analysis of the assessments are valuable, the constructive reviews attained are indeed important for the future development of the device system.
The Influence of Mechanical Treatment Type on the Tribological Properties of Flame Sprayed Ni-5% Al-15% Al2O3 Composite Coatings
Authors: Starosta Robert
Published: August 2020

During operation of marine pumps, one of the most common disability is tribological wear of shaftneck cooperating with the gland. In the practice, worn shafts are exchanged for new or are regenerated bychromium plating, padding or thermally sprayed of ceramic coatings, mainly Al2O3. In this article, the use offlame sprayed Ni-5%Al-15%Al2O3 composite coatings were proposed. The surfaces of coatings by turning,grinding are burnishing treatments were formed. Tribological properties of composite materials are dependent onthe proportion and size of the reinforcing phase particles contained in a metal matrix. A reinforcement compositewith very small dimensions and the amounts may result in increased wear and increase the coefficient of friction.It is therefore important to check whether the advisable of phase composition will not adversely affect the wearof the composite and the cooperating the part. The presence of a 15% volume fraction of the alumina particles onthe selected tribological properties of the Ni-5%Al matrix composite coatings were evaluated. In order to assessthe effect of the applied tapes of finishing on wear of composite coatings, the tribological tests were performedon the "T05" tribometer with head roll- piece type. It has been found that the burnishing favors a lower wear ofcomposite coating and the cooperating element compared to the coatings after turning treatments. At the sametime observed more than ten times less wear intensity of composite coatings in the initial time of friction, whichmay indicate a shorter time needed to running-in of cooperating elements.
Karakter Agronomis dan Fisiologis Tanaman Kopi Robusta (Coffea canephora) pada Dataran Tinggi di Kecamatan Pejawaran Kab. Banjarnegara
Authors: Rizki Duando , Wijonarko Bambang Rudianto , Purwanto Purwanto
Published: August 2020

The agronomic characteristics of Robusta coffee plants are influenced by several factors, one of which is altitude. Robusta coffee can grow optimally at an altitude of 400-1,000 meters above sea level with a temperature of 21-24 °C. Pejawaran sub-district is known as a mountainous area with a height of 900-1600 m above sea level. This research was conducted in July to September 2019 in the coffee garden of Sarwodadi Village, Pejawaran District, Banjarnegara Regency. The selection of research sites was carried out by conducting a survey where 3 altitudes were selected that had a greater number of coffee plants. The research sites include 1,100 m asl, 1,200 m asl and 1,350 m asl, plant samples taken are 10% of the total plant population. Variables observed included chlorophyll a, chlorophyll b, stomata opening, stomata density, plant height, stem diameter, number of productive branches, number of bunches per plant and yield per plant. The results showed that the altitude of 1,100 m asl has chlorophyll content, the number of bunches per plant and yield per plant is better than the other heights of 20.95 mg / g, 8.64 mg / g, 113 and 6.64 kg. The chlorophyll content of a and b is positively related to the number of bunches. Stomatal openings are significantly positive for the number of productive branches. Plant height was negatively related to productive branches and number of bunches. Stem diameter is positively related to the number of bunches. The number of productive branches is positively related to the results.
Role of redox-active axial ligands of metal porphyrins adsorbed at solid–liquid interfaces in a liquid-STM setup
Authors: Habets Thomas , Speller Sylvia , Elemans Johannes A A W
Published: August 2020

In a liquid-STM setup environment, the redox behavior of manganese porphyrins was studied at various solid–liquid interfaces. In the presence of a solution of Mn(III)Cl porphyrins in 1-phenyloctane, which was placed at a conductive surface, large and constant additional currents relative to a set tunneling current were observed, which varied with the magnitude of the applied bias voltage. These currents occurred regardless of the type of surface (HOPG or Au(111)) or tip material (PtIr, Au or W). The additional currents were ascribed to the occurrence of redox reactions in which chloride is oxidized to chlorine and the Mn(III) center of the porphyrin moiety is reduced to Mn(II). The resulting Mn(II) porphyrin products were identified by UV–vis analysis of the liquid phase. For solutions of Mn(III) porphyrins with non-redox active acetate instead of chloride axial ligands, the currents remained absent.
Reactions of 3-aryl-1-(trifluoromethyl)prop-2-yn-1-iminium salts with 1,3-dienes and styrenes
Authors: Schneider Thomas , Keim Michael , Seitz Bianca , Maas Gerhard
Published: August 2020

3-Aryl-1-(trifluoromethyl)prop-2-yn-1-iminium triflate salts represent a novel, highly reactive class of acetylenic iminium salts. Herein we present several reactions which are based on the electron-poor acetylenic bond and on the high electrophilicity of the CF3-substituted iminium group. These salts were found to be highly reactive dienophiles in Diels–Alder reactions with cyclopentadiene, 2,3-dimethylbutadiene and even anthracene. At higher temperature, the cycloadducts undergo an intramolecular SE(Ar) reaction leading to condensed carbocycles incorporating a 1-(trifluoromethyl)-1-(dimethylamine)indene ring system. With styrenes and some substituted styrenes, cascade reactions take place, which likely include cyclobutene and several cationic intermediates and mainly yield 2-(1-phenylvinyl)indenes. In a similar reaction cascade, a fulvene derivative was obtained with 1,4-diphenylbutadiene as the substrate.
LA CONFUSION REINANTE
Authors: Grillo Rosa María
Published: August 2020

Sin información.
SWOC analysis of e-learning educational services at Rawalpindi Medical University in the midst of COVID-19
Authors: Noreen Khola , Umar Muhammad , Sabir Syed Arshad , Farooq Ammara
Published: August 2020

Introduction: The SWOC (strengths, weaknesses, opportunities, and challenges) analysis of e-learning at Rawalpindi Medical University during the period of the COVID-19 pandemic was conducted.

Methods: This cross-sectional survey-based study using a mixed quantitative and qualitative approach was conducted at Rawalpindi Medical University in June 2020 through an online survey. Data were collected electronically from 400 undergraduate medical students and faculty members using online Google forms. The study was carried out after obtaining ethical approval from the Institutional Review Board of Rawalpindi Medical University. Anonymity and confidentiality of data were maintained.

Results: The salient features of e-learning at RMU was the establishment of prospect for remote learning in unprecedented circumstances and promotion of learner-centered, self-directed lifelong learning while the unavailability of internet and professional isolation was reported as a potential weakness, an opportunity provided by this platform was the introduction of blended learning programs and digital competence while potential challenges reported were conduction of valid, reliable and feasible e-assessment and strategies for teaching, learning, and assessment strategies for psychomotor and soft skills.

Conclusion: In-depth analysis of e-learning during the midst of COVID-19 has made this evident that RMU is fully equipped and ready to cope up with any unforeseen event with regards to undergraduate medical education. There is startling need to develop infrastructure for long term sustainability and acceptability by availing opportunities, improving strength, and overcoming potential weaknesses and challenges.
Incidence of COVID-19 in random trauma patients at DHQ Teaching Hospital, Rawalpindi, measures to prevent its spread among patients and health care workers
Authors: Nawaz Tariq , Mehmood Bilal , Ayub Muhammad Waqas , Malik Irfan , Qaisar Umar
Published: August 2020

Background: The objective of the study was to see the incidence of COVID-19 positive, in random trauma patients received in the emergency of abdomen or chest may be penetrating or blunt.

Materials and Methods: This study was conducted in the Accident and Emergency department of District Head Quarter Hospital, Rawalpindi. All trauma patients of abdomen or chest either penetrating or blunt admitted from 1-3-20 to 10-6-20 were included, irrespective of age, gender, comorbidities, and COVID-19 status at the time of admission to hospital. Also to see steps of preventive measures taken in the emergency department, operation theatres, and inwards.

Results: Total number of trauma patients received in the emergency department of District Headquarter Hospital Rawalpindi during this period was 163. Total male patients: 116. Total female patients:47. Penetrating injuries (firearm or stab wounds): 93. Blunt injuries: 70. All the penetrating injuries were operated as an emergency. Among blunt injuries, 51 were operated 19 were treated conservatively. Preoperatively none of the patients’ COVID-19 test was performed because none of them showed any symptoms likely of COVID-19 such as chest infection, flue, malaise, or fever. After the second postoperative day, 12 of the patients developed respiratory distress and their COVID-19 test was sent. Out of 12 patients, 7 turned out to be COVID-19 positive. Other on the second or third postoperative day 7 patients had fever without chest symptoms and underwent COVID-19 testing. 3 turned out to be COVID-19 positive. So a total of 11 patients were found to be positive for COVID-19. The percentage became 6.7% which is quite high.

Conclusion: From this study, its clear in acute trauma patients where you can’t go for the COVID-19 test even then we have to operate may be positive. So every trauma patient should have suspected COVID-19 positive and preventive measures should be taken starting from the emergency department till operation theatres.
A Fronteira e seus Impactos na região de Uruguaiana
Authors: Fernandes Irani , Pêgo Bolívar
Published: August 2020

Palestra proferida por Irani Fernandes na oficina de trabalho Fronteiras do Brasil: uma avaliação do arco Sul realizada em Uruguaiana, no período de 20 a 24 de novembro de 2017.
Política de drogas divergentes e seus efeitos sobre a zona de fronteira Uruguai-Brasil
Authors: Cunha Alexandre dos Santos , Pêgo Bolívar
Published: August 2020

Apresentação sobre a política divergente de drogas e seus efeitos sobre a zona de fronteira entre o Uruguai e o Brasil na oficina de trabalho: Fronteiras do Brasil: uma avaliação do arco Sul, realizada entre os dias 20 e 24 de novembro de 2017, em Uruguaiana (Rio Grande do Sul).
Experiências no território sobre a formação de uma política do núcleo de fronteira de Santa Catarina : o caso do consórcio intermunicipal da fronteira
Authors: Berté Flávio , Pêgo Bolívar
Published: August 2020

Palestra apresentada na oficina de trabalho entre os dias 20 e 24 de novembro de 2017, em Uruguaiana (Rio Grande do Sul).
The Factors Affecting the Adoption of Online Banking Services by Civil Servants in Cameroon
Authors: Ambit Lith Enestine Tembon
Published: August 2020

Factors affecting the adoption of online banking services by civil servants in Cameroon was examined in this survey. Raw data were gotten through questionnaire which was distributed mostly among the civil servant in Douala of Cameroon. The analyses used in this survey were crosstabs test, descriptive analysis, factor analysis, correlation test, and regression test. The findings revealed that awareness factor has a positive and significant effect on online banking, security & trust assurance showed a negative and insignificant effect on online banking service, innovative factor displayed a negative and insignificant effect on online banking service, and customer service assurance revealed positive but has insignificant impact on online banking service. It was concluded that internet banking is difficult to understand and its time consuming among many of the users and internet fraud discourages the use of internet banking in Cameroon. Additionally, the dissemination of information through the internet is not mostly secure and efficient.
Rapidly Growing Cutaneous Squamous Cell Carcinoma of the Nose in Chronic Lymphocytic Leukaemia
Authors: Dhillon Seth
Published: August 2020

Poster presented at BAPIO National Conference, London Nov 2019
Peer reviewed by Subarna Chakravorty & Sunil Daga
A New Method to Constrain Neutron Star Structure from Quasi-periodic Oscillations
Authors: Maselli Andrea , Pappas George , Pani Paolo , Gualtieri Leonardo , Motta Sara , Ferrari Valeria , Stella Luigi
Published: August 2020

We develop a new method to measure neutron star (NS) parameters and derive constraints on the equation of state (EoS) of dense matter by fitting the frequencies of simultaneous quasi-periodic oscillation (QPO) modes observed in the X-ray flux of accreting NSs in low-mass X-ray binaries. To this aim, we calculate the fundamental frequencies of geodesic motion around rotating NSs based on an accurate general-relativistic approximation for their external spacetime. Once the fundamental frequencies are related to the observed frequencies through a QPO model, they can be fit to the data to obtain estimates of the three parameters describing the spacetime, namely the NS mass, angular momentum and quadrupole moment. From these parameters we derive information on the NS structure and EoS. We present a proof of principle of our method applied to pairs of kHz QPO frequencies observed from three systems (4U1608-52, 4U0614+09, and 4U1728-34). We identify the kHz QPOs with the azimuthal and the periastron precession frequencies of matter orbiting the NS, and via our Bayesian inference technique we derive constraints on the neutrons stars’ masses and radii. This method is applicable to other geodesic-frequency-based QPO models.
The Proper Motion of the Central Compact Object RX J0822–4300 in the Supernova Remnant Puppis A, Revisited
Authors: Mayer Martin , Becker Werner , Patnaude Daniel , Winkler P. Frank , Kraft Ralph
Published: August 2020

We present an improved proper-motion measurement of the central compact object RX J0822–4300, located in the supernova remnant Puppis A. By employing a new data set taken in 2019 February by the High Resolution Camera on board the Chandra X-ray Observatory, we approximately double the available temporal baseline for our analysis to slightly more than 19 yr (7000 days). We correct for the astrometric inaccuracy of Chandra using calibrator stars with known optical positions that are detected in all observations. Thereby, we obtain absolute positions of RX J0822–4300 accurate to around

and from these a new best estimate for its total proper motion of

. For a remnant distance of 2 kpc, this corresponds to a projected kick velocity of

at a position angle of

. The proper-motion measurement of RX J0822–4300 is used for discussing the kinematic age of Puppis A.
Optical Variability of the Dwarf AGN NGC 4395 from the Transiting Exoplanet Survey Satellite
Authors: Burke Colin J. , Shen Yue , Chen Yu-Ching , Scaringi Simone , Faucher-Giguere Claude-Andre , Liu Xin , Yang Qian
Published: August 2020

We present optical light curves from the Transiting Exoplanet Survey Satellite (TESS) for the archetypical dwarf active galactic nucleus (AGN) in the nearby galaxy NGC 4395 hosting a ∼105
M
⊙ supermassive black hole (SMBH). Significant variability is detected on timescales from weeks to hours before reaching the background noise level. The ∼month-long, 30 minute-cadence, high-precision TESS light curve can be well fit by a simple damped random walk (DRW) model, with the damping timescale τ
DRW constrained to be

days (1σ). NGC 4395 lies almost exactly on the extrapolation of the

relation measured for AGNs with BH masses that are more than three orders of magnitude larger. The optical variability periodogram can be well fit by a broken power law with the high-frequency slope (−1.88 ± 0.15) and the characteristic timescale (

days) consistent with the DRW model within 1σ. This work demonstrates the power of TESS light curves in identifying low-mass accreting SMBHs with optical variability, and a potential global

relation that can be used to estimate SMBH masses with optical variability measurements.
CO Depletion in Protoplanetary Disks: A Unified Picture Combining Physical Sequestration and Chemical Processing
Authors: Krijt Sebastiaan , Bosman Arthur D. , Zhang Ke , Schwarz Kamber R. , Ciesla Fred J. , Bergin Edwin A.
Published: August 2020

The gas-phase CO abundance (relative to hydrogen) in protoplanetary disks decreases by up to two orders of magnitude from its interstellar medium value of ∼10−4, even after accounting for freeze-out and photodissociation. Previous studies have shown that while local chemical processing of CO and the sequestration of CO ice on solids in the midplane can both contribute, neither of these processes appears capable of consistently reaching the observed depletion factors on the relevant timescale of 1–3 Myr. In this study, we model these processes simultaneously by including a compact chemical network (centered on carbon and oxygen) to 2D (r + z) simulations of the outer (r > 20 au) disk regions that include turbulent diffusion, pebble formation, and pebble dynamics. In general, we find that the CO/H2 abundance is a complex function of time and location. Focusing on CO in the warm molecular layer, we find that only the most complete model (with chemistry and pebble evolution included) can reach depletion factors consistent with observations. In the absence of pressure traps, highly efficient planetesimal formation, or high cosmic-ray ionization rates, this model also predicts a resurgence of CO vapor interior to the CO ice-line. We show the impact of physical and chemical processes on the elemental (C/O) and (C/H) ratios (in the gas and ice phases), discuss the use of CO as a disk mass tracer, and, finally, connect our predicted pebble ice compositions to those of pristine planetesimals as found in the Cold Classical Kuiper Belt and debris disks.
2003–2019 Monitoring of the Crab Emission through INTEGRAL SPI, or Vice Versa
Authors: Jourdain E. , Roques J. P.
Published: August 2020

The Crab Nebula is used by many instruments as a calibration source, in particular at high energy, where it is one of the brightest celestial objects. The spectrometer INTEGRAL SPI (20 keV–8 MeV), in operation since 2002 October, offers a large data set dedicated to this source, with regular campaigns planned twice per year. We have analyzed the available data to quantify the source behavior on a long-term scale and examine the stability level on timescales from hours to years. As a result, the source flux variability appears to be contained within less than ±5% around an ∼20 yr mean value for broad bands covering the 20–400 keV energy domain, above which statistics limits any firm conclusion. In terms of spectral shape, the Band model provides a good description of the observed emission between 20 keV and 2.2 MeV. The averaged spectrum best-fit parameters correspond to a low-energy slope of 1.99 ± 0.01, a high-energy slope of −2.32 ± 0.02, and a characteristic energy E

c
of 531 ± 50 keV to describe the curvature joining both power laws. The spectral parameters have then been determined on the revolution timescale (∼1–2 days), and their steadiness confirms the source emission stability. As a complementary result, this study demonstrates that the SPI instrument efficiency remains within 5% of its initial value after 17 yr of operation.