bluuebunny/crossref_metadata_2025 huggingface dataset:
Relationships between geomagnetic Ар-indeх and parameters of the immunity in patients with neuroendocrine-immune complex dysfunction in former sportsmen
Authors: Tserkovniuk Ruslan , Yanchij Roman , Plyska Oleksandr , Kovbasnyuk Marta , Chendey Ivanna , Hagner-Derengowska Magdalena , Zukow Xawery , Kałużny Krystian , Muszkieta Radosław , Zukow Walery
Published: January 2022

Background. The effect of geomagnetism on human immunity has so far been studied through long-term observations. Recently, we have been detected the immediate immunotropic effects of the disturbances of the geomagnetic field (Ap-index) at multiple sclerosis patients. The aim of this study was to identify the immunotropic effects of geomagnetism on another contingent of people. Material and methods. The object of observation were 21 men (24-63 y) and 20 women (33-62 y) with neuroendocrine-immune complex dysfunction. Each patient was tested twice with an interval of 4 days. Observations were carried out on 09.06. and 13.06. 2015, 14.09 and 18.09. 2015, 27-28.03. and 04-05.04. 2018, 28.01. and 01.02. 2019. Retrospectively we recorded the geomagnetic Ap-Index on the day of testing and during the previous 7 days, using resource https://www.spaceweatherlive.com/. The content of subpopulations of lymphocytes expressing CD3, CD4, CD25, CD8, CD22 and CD56 receptors as well as the serum concentration of circulating immune complexes, immunoglobulins classes M, G, A, C-reactive protein and IL-1β was determined. The state of phagocytic function of neutrophils estimated by microbial count and phagocytic and killing indices against Staphylococcus aureus and Escherichia coli. Results. During the week, the average level of Ap-index ranged from 7 to 13 nT. Maximum coefficients of multiple correlation with immunity parameters were detected for Ap-index on the eve of blood sampling (R=0,768) and 5 days before it (R=0,758) while the minimum on 3 (R=0,541) and 2 (R=0,479) days before sampling. The canonical correlation between Ap-indices for 7 days before and on the day of testing, on the one hand, and the immunity parameters - on the other hand, was very strong: R=0,921; R2=0,849; χ2(200)=375; p<10-6. Conclusion. Disturbances of the geomagnetic field (Ap-index) has a significant immediate modulating effect on the immune parameters, mostly phagocytosis completeness, Igg A and M serum concentration, T-helper and B lymphocytes as well as eosinophils, rod-shaped neutrophils and monocytes blood level.
Shield-Net: Matching Supply with Demand for Face Shields During the COVID-19 Pandemic
Authors: Alcock Rebecca , Boutilier Justin J. , Siddiq Auyon
Published: January 2022

The initial months of the COVID-19 pandemic were marked by widespread shortages of personal protective equipment (PPE) because of surging demand and a fragile global supply chain. In response, many domestic suppliers pivoted to producing PPE, such as masks and face shields, made possible by low material costs and simple designs. A key challenge that remained was the lack of an established marketplace for nontraditional suppliers of PPE to connect with healthcare facilities in need. To address this inefficiency, we launched an online platform, Shield-Net, to match requests for face shields with new suppliers of PPE. Our platform was based on an optimization model that produced supplier-requester pairs and took into account request urgency, request size, production capacity, location, and product type. During the period of March to September 2020, Shield-Net produced 390 matches, resulting in the shipment of more than 50,000 face shields to 68 unique requesting organizations. Supplier-requester proximity was found to be the only statistically significant variable in the success of a match. In this paper, we discuss the development and impact of our matching platform, as well as lessons learned during its operation.

History: This paper was refereed. This article has been selected for inclusion in the Special Issue on Analytics Remedies to COVID-19.

Funding: This work was supported by the National Science Foundation [Grant CMMI-2029072].
Stepping into Ill-Fitting Shoes: Local Status Contrasts and Acquisitiveness of New CEOs
Authors: Krishnan Kozhikode Rajiv , Krishnan Rekha
Published: January 2022

This paper asks what motivates new chief executive officers (CEOs) to engage in an acquisition spree despite the considerable risk it entails to themselves and their firms. Building on status theory and performance feedback theory, we theorized that status distance between new CEOs and their predecessors explains the empire-building behavior of new CEOs early in their tenure. Because of the uncertainty surrounding a CEO’s quality early in the individual’s tenure, status serves as a signal of quality for the new CEO. Hence, CEOs had to rely on status signals to maintain or close the status gap between them and their predecessors. Drawing on performance feedback theory, we theorized that new CEOs’ status contrast relative to their predecessor influences their acquisitive behavior. Our examination of the acquisition behavior of 429 new CEOs of S&P 500 firms in the United States revealed that relatively low-status CEOs engaged in risk-taking to improve their status, but relatively high-status new CEOs engaged in risk-taking to maintain their lead. It also revealed that new CEOs changed their risk-taking behavior when direct evidence of their quality or that of their predecessors deviated from the underlying quality expectations indicated by their relative status position.
Haemophagocytic Lymphohistiocytosis as a Complication of Israeli Spotted Fever
Authors: Andrade Maria Margarida , Gorgulho Ana , Tinoco Magalhães Rita , Valadas Rita , Pereira Luís Miguel , Freire Sara , Cruz Diogo
Published: January 2022

Rickettsia spp. human infection is endemic in Portugal in the form of Mediterranean spotted fever caused by R. conorii subsp. conorii and Israeli spotted fever (ISF) caused by R. conorii subsp. israelensis. We describe a rare case of haemophagocytic lymphohistiocytosis (HLH) due to ISF, with atypical manifestations. We highlight the need for clinical suspicion for this diagnosis and the importance of timely intervention and support.
Enabling self-management of eczema in primary care
Authors: Van Onselen Julie
Published: January 2022

Practice nurses are ideally placed to manage chronic eczema, writes Julie Van Onselen
Evaluation of Warning Methods for Remotely Supervised Autonomous Agricultural Machines
Authors: Edet Uduak , Mann Danny D.
Published: January 2022

Highlights

Humans who supervise autonomous agricultural machines require some type of warning to perceive abnormal conditions in the machine or its environment.

Visual and tactile warnings were the most suitable warning methods for in-field and close-to-field remote supervision.

This study will help improve the performance of remote supervisors and minimize unexpected incidents or liabilities during operation of autonomous machines.

Abstract. As agricultural machinery moves toward full autonomy, human supervisors will need to monitor the autonomous machines during operation and minimize system failures or malfunctions. However, to intervene in an emergency, the supervisor must first recognize the emergency in a timely manner. Existing warning devices rely on the human visual, auditory, and tactile senses. However, these warning methods vary in their ability to attract attention. Hence, it is important to determine which warning method is best suited to draw the attention of a remote supervisor of an autonomous machine in an emergency. To achieve this objective, participants were recruited and asked to interact with a simulation of an autonomous sprayer. Seven warning methods (presented alone or in combinations of visual, auditory, and tactile sensory cues) and four remote supervision scenarios (in-field, close-to-field, farm office, outside the farmland) were considered in this study. The findings revealed that a combination of tactile and visual methods was most suitable for in-field and close-to-field remote supervision, in comparison to the other warning methods. However, there was insufficient evidence to recommend the best warning methods for supervisors at the farm office or outside the farmland. This study will help improve the performance of remote supervisors and minimize unexpected incidents during field operations with autonomous agricultural machines. Keywords: Agricultural machines, Remote supervision, User-centered design, Warning system.
Extraordinary broadband impedance matching in highly dispersive media - the white light cavity approach
Authors: Scheuer Jacob , Filonov Dmitry , Vosheva Tatyana , Ginzburg Pavel
Published: January 2022

Suppressing reflections from material boundaries has always been an objective, common to many disciplines, where wave phenomena play a role. While impedance difference between materials necessarily leads to a wave reflection, introducing matching elements can almost completely suppress this phenomenon. However, many impedance matching approaches are based on resonant conditions, which come at a price of narrow bandwidth operation. Although various impedance matching architectures have been developed in the past, many of them fail to produce a broadband and flat (ripple-free) transmission, particularly in the presence of strong chromatic dispersion. Here we propose and demonstrate an approach for designing an optimal matching stack capable of providing a flat broadband transmission even in the presence of significant group velocity dispersion. As an experimental example for the method verification, we used a strong modal dispersion in a rectangular waveguide, operating close to a mode cut-off. The waveguide core consists of alternating polymer sections with a variable filling factor, realized using additive manufacturing. As a result, a broadband matching in the range of 7-8GHz was demonstrated and proved to significantly outperform the standard binomial transformer solution. The proposed method can find use across different disciplines, including optics, acoustics and wireless communications, where undesired reflections can significantly degrade system’s performances.
Towards practical holographic coherent diffraction imaging via maximum likelihood estimation
Authors: Barmherzig David A. , Sun Ju
Published: January 2022

A new algorithmic framework is developed for holographic coherent diffraction imaging (HCDI) based on maximum likelihood estimation (MLE). This method provides superior image reconstruction results for various practical HCDI settings, such as when data is highly corrupted by Poisson shot noise and when low-frequency data is missing due to occlusion from a beamstop apparatus. This method is also highly robust in that it can be implemented using a variety of standard numerical optimization algorithms, and requires fewer constraints on the physical HCDI setup compared to current algorithms. The mathematical framework developed using MLE is also applicable beyond HCDI to any holographic imaging setup where data is corrupted by Poisson shot noise.
Analytical models of electron leakage currents in gallium nitride-based laser diodes and light-emitting diodes
Authors: Li Shukun , Yu Guo , Lang Rui , Lei Menglai , Chen Huanqing , Khan Muhammad Saddique Akbar , Meng Linghai , Zong Hua , Jiang Shengxiang , Wen Peijun , Yang Wei , Hu Xiaodong
Published: January 2022

The electrical-to-optical power conversion efficiencies of the light-emitting devices based on gallium nitride (GaN) are seriously limited by electron leakage currents due to the relatively low mobility and activation ratio of holes. However, there have been few theoretical models on the behavior of the leakage current with an increasing total current. We develop an Ohmic-law-like method to describe the transport behaviors of the systems with electron and hole currents simultaneously. Based on reasonable assumptions, the ratio of the leakage current to the total current is related to the differential resistances of the devices. Through the method, we develop analytical models of the leakage currents in GaN-based laser diodes (LDs) and light-emitting diodes (LEDs). The ratios of the leakage currents with total currents in LDs and LEDs are shown to increase, which explains the sublinear behaviors of the luminescence-current (LI) curves of the devices. The theory agrees well with the numerical simulation and experimental results in larger current ranges in comparison to the traditional ABC model. The above analytical model can be used to fast evaluate the leakage currents in GaN-based LDs and LEDs.
Spectrally pure photons generated in a quasi-phase matched xenon-filled hollow-core photonic crystal fiber
Authors: Larson Walker , Courtney Trevor L. , Keyser Christian
Published: January 2022

Spectrally pure photons heralded from unentangled photon pair sources are crucial for any quantum optical system reliant on the multiplexing of heralded photons from independent sources. Generation of unentangled photon pairs in gas-filled hollow-core photonic crystal fibers specifically remains an attractive architecture for integration into quantum-optical fiber networks. The dispersion design offered by selection of fiber microstructures and gas pressure allows considerable control over the group-velocity profile which dictates the wavelengths of photon pairs that can be generated without spectral entanglement. Here, we expand on this design flexibility, which has previously been implemented for four-wave mixing, by modeling the use of a static, periodically poled electric field to achieve an effective quasi-phase-matched three-wave mixing nonlinearity that creates spontaneous parametric downconversion. Electric-field-induced quasi-phase-matched spontaneous parametric downconversion enables control of phase matching conditions that is independent of the group velocity, allowing phase matching at arbitrary wavelengths without affecting the entanglement of photons at those wavelengths. This decoupling of entanglement engineering and phase matching facilitates spectrally pure photon pair generation with efficiency and wavelength-tunability that is otherwise unprecedented.
Realization of broadband truly rainbow trapping in gradient-index metamaterials
Authors: Xu Jie , Xiao Sanshui , He Panpan , Wang Yazhou , Shen Yun , Hong Lujun , Luo Yamei , He Bing
Published: January 2022

Unidirectionally propagating wave (UPW) such as surface magnetoplasmon (SMP) has been a research hotspot in the last decades. In the study of the UPW, metals are usually treated as perfect electric conductors (PECs). However, it was reported that the transverse resonance condition induced by the PEC wall(s) may significantly narrow up the complete one-way propagation (COWP) band. In this paper, ultra-broadband one-way waveguides are built by utilizing the epsilon-negative (ENG) metamaterial (MM) and/or the perfect magnetic conductor (PMC) boundary. In both cases, the total bandwidth of the COWP bands are efficiently enlarged by more than three times than the one in the original metal-dielectric-semiconductor-metal structure. Moreover, the one-way waveguides consisting of gradient-index metamaterial are proposed to achieve broadband truly rainbow trapping (TRT). In the full-wave simulations, clear broadband TRT without back reflection is observed in terahertz regime. Besides, giant electric field enhancement is achieved in a PMC-based one-way structure, and the amplitude of the electric field is enormously enhanced by five orders of magnitude. Our findings are beneficial for researches on broadband terahertz communication, energy harvesting and strong-field devices.
Unlocking synchrotron sources for THz spectroscopy at sub-MHz resolution
Authors: Hearne T. S. , Mammez M.-H. , Mammez D. , Martin-Drumel M.-A. , Roy P. , Pirali O. , Eliet S. , Barbieri S. , Hindle F. , Mouret G. , Lampin J.-F.
Published: January 2022

Synchrotron radiation (SR) has proven to be an invaluable contributor to the field of molecular spectroscopy, particularly in the terahertz region (1-10 THz) where its bright and broadband properties are currently unmatched by laboratory sources. However, measurements using SR are currently limited to a resolution of around 30 MHz, due to the limits of Fourier-transform infrared spectroscopy. To push the resolution limit further, we have developed a spectrometer based on heterodyne mixing of SR with a newly available THz molecular laser, which can operate at frequencies ranging from 1 to 5.5 THz. This spectrometer can record at a resolution of 80 kHz, with 5 GHz of bandwidth around each molecular laser frequency, making it the first SR-based instrument capable of sub-MHz, Doppler-limited spectroscopy across this wide range. This allows closely spaced spectral features, such as the effects of internal dynamics and fine angular momentum couplings, to be observed. Furthermore, mixing of the molecular laser with a THz comb is demonstrated, which will enable extremely precise determinations of molecular transition frequencies.
Anti-aliasing phase reconstruction via a non-uniform phase-shifting technique
Authors: Zhu Huijie , Guo Hongwei
Published: January 2022

The conventional phase-shifting techniques commonly suffer from frequency aliasing because of their number of phase shifts below the critical sampling rate. As a result, fringe harmonics induce ripple-like artifacts in their reconstructed phase maps. For solving this issue, this paper presents an anti-aliasing phase-measuring technique. Theoretical analysis shows that, with phase-shifting, the harmonics aliased with the fundamental frequency component of a fringe signal depend on the greatest common divisor (GCD) of the used phase shifts. This fact implies a possibility of removing such aliasing effects by selecting non-uniform phase shifts that together with 2π have no common divisors. However, even if we do so, it remains challenging to separate harmonics from the fundamental fringe signals, because the systems of equations available from the captured fringe patterns are generally under-determined, especially when the number of phase shifts is very few. To overcome this difficulty, we practically presume that all the points over the fringe patterns have an identical characteristic of harmonics. Under this constraint, using an alternate iterative least-squares fitting procedure allows us to estimate the fringe phases and the harmonic coefficients accurately. Simulation and experimental results demonstrate that this proposed method enables separating high order harmonics from as few as 4 fringe patterns having non-uniform phase shifts, thus significantly suppressing the ripple-like phase errors caused by the frequency aliasing.
Effect of erbium concentration on the Verdet constant dispersion of LiY1.0-xErxF4 single crystal
Authors: Tamaru Yuki , Kumai Hikaru , Fuchimukai Atsushi , Uehara Hiyori , Miura Taisuke , Yasuhara Ryo
Published: January 2022

The dispersion of the Verdet constant of LiY1.0-xErxF4 crystals was evaluated from 190 nm to 500 nm for different doping concentrations of Er ions. A 15% doping concentration yielded a high Verdet constant of 54.5 rad/(T·m) at 193 nm. This value can be explained by the contribution of the diamagnetic term associated with LiYF4 and the paramagnetic term of the Er ions. Although the LiYF4 crystal yielded a lower value of −36.6 rad/(T·m) at 193 nm from Er-doped LiYF4, it can be used in the vacuum–ultraviolet region because of its high transmittance at wavelengths longer than 120 nm.
Schreibcoaching im beruflichen Übergangssystem. Auf der Suche nach Förderbedarfen und wirksamen Gelingensfaktoren
Authors: Kayal Amir , Efing Christian
Published: January 2022

Der folgende Beitrag präsentiert das sprachdidaktisch-sozialwissenschaftliche Projekt KOFISCH, in dem ein empirie-basiertes Konzept zur Schreibförderung im beruflichen Übergangssystem für junge Erwachsene mit geringer Literalität entwickelt wird. Basis des Konzepts sind Ergebnisse aus qualitativen empirischen Untersuchungen in einer berufsvorbereitenden Bildungsmaßnahme mit produktionsorientiertem Ansatz. Diese ergeben sich zum einen aus Hospitationen und Interviews mit Anleiter*innen (n = 4), Sozialpädagog*innen (n = 2) und Lehrkräften (n = 3) zu Handlungsabläufen und Schreibanforderungen und zum anderen aus Textbewertungen authentischer Lernertexte (n = 208) zur Erhebung der vorhandenen Kompetenzen sowie Förderbedarfe der jugendlichen Teilnehmenden (n = 24; 23 männlich und 1 weiblich im Alter von 16 bis 19 Jahren) im Bereich der berufsbezogenen Schreibkompetenz. Das daraus resultierende Förderkonzept beruht auf den authentischen Schreibanforderungen der berufsvorbereitenden Maßnahme sowie auf existierenden generellen anforderungs- und szenarienbasierten, handlungs- und schreibprozessorientierte Förderansätzen.
africanismo castrense
Authors: Macías Fernández Daniel , García Pujades Sergio
Published: January 2022

El propósito de este artículo es realizar un estado de la cuestión del africanismo castrense, un grupo militar forjado en el contexto colonial de las Campañas de Marruecos (1909-1927) y decisivo para comprender la historia contemporánea española del siglo xx. Para ello se ha procedido a una revisión sistemática de la bibliografía existente en torno al tema para estudiar su tratamiento a lo largo de los últimos años. De esta forma se pretenden desgranar las diferentes características que se atribuyen a estos militares para observar los puntos débiles de la situación actual de las investigaciones. A la par se propondrán algunas posibles vías de estudio y tratamiento del tema.
Effect of barley straw and Egyptian clover hay on the rumen fermentation and structure and fibrolytic activities of rumen bacteria in dromedary camel
Authors: Rabee Alaa Emara
Published: January 2022

Background and Aim: Understanding the regulations of rumen microbiota and their fibrolytic capabilities under different forages are essential to improve rumen fermentation and animal feed efficiency. This study aimed to evaluate the changes in the rumen fermentation and the structure and fibrolytic activities of rumen bacteria in camels fed barley straw and Egyptian clover hay.

Materials and Methods: Three fistulated camels were fed a diet containing barley straw for 30 days; then transitioned to a diet containing Egyptian clover hay for 30 days. In addition, bacterial media enriched with xylan and different cellulose sources, namely, filter paper, wheat straw, and alfalfa hay, were used to evaluate the ability of camel rumen bacteria to produce xylanase and cellulase enzymes.

Results: The camel group fed Egyptian clover hay showed higher crude protein intake, rumen ammonia, total volatile fatty acids, and acetic acid. Moreover, the camel group fed barley straw showed higher neutral detergent fiber intake, rumen pH, and propionic and butyric acids. Principal component analysis showed that bacterial communities were separated based on the forage type. Forage type affected the composition of rumen bacteria and most of the bacterial community was assigned to phylum Bacteroidetes and Firmicutes. Egyptian clover hay diet increased the proportions of genus Prevotella and Ruminococcus; while fed barley straw diet increased the Butyrivibrio, RC9_gut_group, and Fibrobacteres. The bacterial culture of the Egyptian clover hay fed group produced the greatest xylanase and the bacterial culture of the barley straw fed group produced the maximum cellulase.

Conclusion: Egyptian clover hay is recommended to feed camels in intensive production. Moreover, the bacterial community in the camel rumen is a promising source of lignocellulolytic enzymes.
Recovery Potential of Spinal Meningioma Patients With Preoperative Loss of Walking Ability Following Surgery – A Retrospective Single-Center Study
Authors: Vasankari Ville , Haeren Roel , Niemelä Mika , Korja Miikka
Published: January 2022

Objective: Spinal meningiomas are neurosurgical rarities that manifest with progressive paraor tetraparesis. The effect of timing of surgery on the recovery after the loss of walking ability is poorly known. We studied the effect of timing of surgery on restoring walking ability in surgically-treated spinal meningioma patients.Methods: Using electronic health records, we retrospectively identified ≥ 18-year-old patients operated on during 2010–2020. The patients were followed until 30th September 2020, death or emigration.Results: We identified 108 patients (81% women) with operated spinal meningiomas. The mean age of the patients was 64 years (range, 18–94 years). A gross total resection was achieved in 101 (94%), and 21 patients (19%) suffered from perioperative complications. Of the 108 patients operated on, 49 (45%) could not walk without assistance prior to surgery. At the time of first postoperative visit (mean, 3.1 months; range, 1.3–13.1 months), 14 out of 24 patients (58%) operated on within 29 days and 8 out of 20 patients (40%) operated on later than 29 days since the loss of walking ability without assistance, were able to walk without assistance. Also, 3 out of 5 paraplegic patients who underwent surgery later than 29 days after they lost the walking ability, were able to at least walk with assistance at first postoperative visit.Conclusion: Early surgical treatment following the loss of walking ability restores walking ability in a substantial number of patients. However, even late surgery may restore walking ability.
A critical evaluation of the species extinction by human influence
Authors: Ding Yuanzhao
Published: January 2022

Currently, biodiversity conservation is an indispensable work in many countries. In biodiversity conservation, species extinction is one hot research topic. This paper started with the extinction theory and literature analysis, then it examined the main reasons for the species extinction (climate change, habitat loss and fragmentation, introduced species, chains of extinction, infectious disease, overexploitation, and pollution). This paper can enhance people’s understanding of species extinction and the importance of biodiversity conservation.
Yoghurt (LAB) as preventive method against COVID-19
Authors: Karthik bose
Published: January 2022

This article targets the data available/ reported till date in the scientific community and tries to provide comprehensive review/insights into the beneficial usage of Probiotics (not all Probiotics) /Tyndallized Probiotics especially Yoghurt in preventing COVID-19 during very initial/early stages but not during the treatment of the disease.
The Significance of Psychosocial Well-Being for Trauma Healing in Randa Abdel-Fattah's Where The Streets Had a Name
Authors: Aulia Lisa
Published: January 2022

This paper elaborates an in-depth research on the novel Where the Streets Had a Name. This research aims to analyze trauma as the impact of Palestinian-Israeli conflict to Hayaat. Hayaat a Palestinian that is exposed to traumatic memory end up coping with her traumatic memory in the conflicting country, and Hayaat finds one of her trauma healing from Israelis as the party that threatens and intimidates Palestinians. Trauma is a psychological injury which is caused by emotional shock. As this research uses the qualitative method, this research aims to explain trauma healing on Hayaat. To analyze the change that Hayaat experience because of trauma, this research uses trauma theory by Nigel C. Hunt. The theory discusses how trauma emerges traumatic symptoms such as intrusive recollections, avoidance, negative emotions and thoughts, and hyperarousal to traumatized people. The theory brings a solution up to help traumatized people to cope with trauma. By the presence of psychosocial well-being, Hayaat successfully cope with her trauma.[Penelitian ini meneliti novel Where the Streets Had a Name dengan tujuan untuk menganalisis dampak atas konflik Palestina-Israel terhadap Hayaat. Hayaat adalah orang Palestina yang terpapar kejadian traumatis dan berhasil sembuh dari trauma di negara yang sedang berkonflik. Ia disembuhkan oleh orang-orang Israel yang selama ini mengancam dan mengintimidasi orang-orang Palestina. Trauma merupakan penyakit kejiwaan yang disebabkan oleh emosi yang terguncang. Sebagai sebuah penelitian kualitatif, penelitian ini bertujuan untuk menjelaskan penyembuhan trauma terhadap Hayaat. Untuk menganalisis trauma yang dialami Zeynab, penelitian ini menggunakan teori trauma oleh Nigel C. Hunt. Teori tersebut membahas bagaimana trauma memunculkan simtom-simtom trauma seperti ingatan yang menggangu, pengabaian, emosi dan pikiran negatif, serta perubahan emosi serta tingkah laku terhadap orang-orang yang menderita trauma. Teori tersebut menyuguhkan solusi atas trauma yang dialami oleh penderita. Kehadiran psikososial membantu Hayaat untuk mengatasi trauma yang ia alami.]
Editorial
Authors:   University of Venda, Masahela Mary , Calitz Talita ,   University of Pretoria
Published: January 2022

t gives us great pleasure to get the opportunity to write this editorialatatime when the world continues to be pushed and tossed by the Covid-19 pandemic.Who would have thought that almost two years later countries would be experiencing a fourthwave of the pandemic despite the existence of vaccines!This is confirmation that there is need to consistently do things differently. No more one size fits all.Ugly as this pandemic maybe, it pushes every structure and culture of the world,including the higher education sector,to think out of their comfort box for survival.Intellectuals continue to challenge the current colonised form of operation in the higher education sector as an attempt to dealwithinequalities of the past. All five papers inthis Issueprovide a strong accountof social justice;yettheirfocus is on different concerns about higher education today. In this issue, we see how national politics play outin higher education contexts fromdifferent countries. Of the five papers, only one paper is set in Zimbabwe while the other four are located in South Africa. Interestingly, they all portray similar social injustices.
Open(ing) Education: Theory and Practice
Authors:   The Open University, Alla-Mensah Joyceline
Published: January 2022

Book Review Conrad, D. & Prinsloo, P. (eds.). 2020. Open(ing) Education: Theory and Practice. Leiden Boston: Brill | Sense.
KÜRESEL HAVAYOLU İTTİFAKLARININ HAVAYOLU İŞLETMELERİ ÜZERİNDE YARATTIĞI DEĞİŞİM ÜZERİNE BİR ALAN ARAŞTIRMASI
Authors: ESİN Murat , DÜZGÜN Murat
Published: January 2022

Günümüzde en hızlı gelişim gösteren sektörlerden birisi olan hava taşımacılığı sektörü de çok boyutlu bir kavram olan küreselleşme sürecinden payını almış, zaman içinde büyük değişimler göstermiştir. Havayolu sektöründe faaliyet gösteren işletmeler de sektörün geçirdiği değişimi yaşamışlar artan rekabet unsurları, artan dışa açılma ve küresel bir havayolu olma baskıları ile karşı karşıya gelmekte ve bu etkenlere karşı yeni çözümler geliştirip, yeni yönetim teknikleri ile bu çözümleri hayata geçirmeye çalışmışlardır. Bu bağlamda, söz konusu sürecin havayolu taşımacılığında ve havayolu işletmelerinde yarattığı en önemli değişimler ise, maliyet politikalarının değişimi, işletmelerin toplam kalite yönetimi felsefesini benimsemeleri, işletmelerin iş birliklerine gitmeleri ve işletmelerin düşük maliyetli havayolu kimliğine bürünmek istemeleri olarak karşımıza çıkmıştır. Havayolu işletmelerinde bilhassa Uçak Filo Sigorta Primleri işletme maliyetinin önemli bir unsuru olmaktadır. Çalışmanın uygulama bölümünde ise, görev tanımına göre belirlenen 500 konu ile ilgili havayolu çalışanından amaçsal örnekleme yolu ile seçilen en az 50 kişiye önceden yapılandırılarak anket uygulanmıştır. Elde edilen verilerle yapılan analizler, küresel havayolu ittifaklarının havayolu işletmeleri üzerinde yarattığı önemli değişimleri, yönetim yapılarını, stratejilerini, kurumsal itibarlarını, pazar paylarını, ürün ve/veya hizmetlere olan bakışlarını nasıl etkilediğini açıklamaktadır.
THE ROLE OF ECONOMIC FREEDOM, TRADE AND TECHNOLOGY ON TOTAL FACTOR PRODUCTIVITY GROWTH
Authors: TAŞ Cumhur , ULUSOY Veysel
Published: January 2022

There are many studies on Total Factor Productivity growth in the literature. These studies generally cover the pairwise correlation between total factor productivity growth and other variables. There is not multivariable study. This study examines relationship between economic freedom, human capital, intra-industry trade, foreign direct investment and their interaction effect on total factor productivity growth in natural resource rich and OECD countries. Panel data analysis is used in covering 20 Natural Resource Rich, 34 OECD countries between 1980 and 2014. Instrumental variables and Two Step Generalized Method of Moments are used to model relationship. There is a significant relation between total factor productivity growth and other variables in both models except foreign direct investment in natural resource rich countries.
The Effectivity of Parsley (Petroselinum crispum) Extract on The Growth Inhibition of Candida Albicans
Authors: Arismunandar Rafinda Naditya , Nosartika Isniya , Purnomo Brigitta Natania Renata , Antari Arlita Leniseptaria
Published: January 2022

Background: Denture stomatitis is a type of Candida-associated infection that mainly affects the palatal mucosa. Candida albicans is one of the normal flora that is considered to be the primary etiologic agent in the pathogenesis of denture stomatitis. Denture decontamination is necessary to prevent denture stomatitis. One method of decontamination is by immersing removable dentures in an antifungal solution. Parsley (Petroselinum crispum) is a medicinal plant showing antifungal activity. Objectives: To determine the effectivity of immersion of acrylic resin Plate in parsley extract on inhibition of growth of Candida albicans. Methods: The effectivity of immersion of heat-cured acrylic resin plates in parsley extract on inhibition of C. albicans growth was tested using an experimental laboratory study with a post-test-only control group design. Thirty samples were divided into 5 groups as 0.01%, 0.02%, and 0.05% parsley ethanol extract, 0.1% sodium hypochlorite, and sterile aquadest.  The number of colony forming units per mL was obtained after calculating the colonies on SDA media, allowing the minimum inhibitory concentration (MIC) obtained according to the formula. Results: 0.01% parsley ethanol extract is MIC with a mean of 7.4 CFU / ml, which inhibited the growth of C. albicans by 31.05%. The Kruskal Wallis test (p<0.001) results indicate that there is an effectivity of immersion of acrylic resin plate in parsley extract on inhibition of growth of C. albicans. Conclusions: The immersion of acrylic resin plates in parsley ethanol extract with a concentration of 0.01%, 0.02%, and 0.04% has effectivity on the inhibition of growth of C. albicans.
Mechanical Properties of Commercial Recycled Polypropylene from Plastic Waste
Authors: Handayani Sri Utami , Fahrudin Muhamad , Mangestiyono Wiji , Hadi Muhamad Alaya Fadlu
Published: January 2022

In Indonesia increasing the use of plastic will increase plastic waste because waste management in Indonesia is still poor. Plastics can be recycled and used to make plastic bags, toys and various household utensils, but their use is still very limited. This limitation is because the strength of recycled plastic is not as good as virgin plastic pellets, so the resulting product tends to be brittle. This study aims to determine the mechanical properties of plastics made from recycled polypropylene plastic. Five specimens are made according to the ASTM D 638 type II standard. The results show that yield strength is 16.357±2.65 MPa, elastic modulus 295,926 ± 41,97 MPa and ultimate tensile stress 19,701±1,261 MPa. The yield stress of recycled polypropylene has a lower value than the yield stress on recycled polypropylene studied by Abdelhaleem et.al or Barbosa et.al which is around 21 MPa[7][5]. This difference is possible due to the different quality of raw materials and processing.
Effect of Winglets on Improving Wind Turbine Performance
Authors: Handayani Sri Utami
Published: January 2022

Indonesia, with the longest coastline in the world, has enormous potential to develop large-scale wind energy. In wind turbines, the formation of a wake behind the wind turbine can reduce efficiency. It is estimated that the formation of a vortex tip behind the wind turbine blade can be reduced by adding a winglet. The main function of winglets attached to the blade is to reduce the effect of the wingtip vortices which are generated due to 3D spanwise flow that occurs because of the pressure non- equalization between the upper and lower blade surfaces. This paper aims to summarize the results of research on the effect of adding winglets to wind turbines.
Multiphase Rapid Filling Conditions of Tunnel System in Columbus, Ohio
Authors:   Auburn University, Vasconcelos Jose , Gheith Hazem ,   ARCADIS, Pachaly Robson L. ,   Auburn University, Abdel-Latif Mohamed ,   HA-m Corporation, Herr Robert ,   City of Columbus
Published: January 2022

The City of Columbus, Ohio is implementing a tunnel system to reduce the number of episodes of combined sewer overflows into the Scioto River. The tunnel systems provide relief to the existing Olentangy Scioto Interceptor Sewer. Two new tunnels being implemented are the OSIS Augmentation and Relief Sewer (OARS), in service since July 2017, and the Lower Olentangy Tunnel (LOT) that is planned to be in service in 2025. The performance of these tunnels in respect to high inflow conditions was investigated with the use of the HAST mixed flow model and the OpenFOAM CFD model to determine the magnitude of surges, the possibility of air pocket entrapment, air–water surging, and the consequences of uncontrolled air pocket releases through shafts. Inflows into the systems were obtained from a calibrated collection system SWMM model. Modeling results quantified surging in the tunnel dropshafts and their mitigation from built-in surge control chambers. HAST simulations also pointed to locations where air pockets could form. These results were used in OpenFOAM to determine the effects of uncontrolled air release through the shaft that links the two tunnels. It was shown that proper ventilation at the shaft will mitigate the growth of air phase pressure to damaging levels.
Compact perturbations of operators with property (t)
Authors: Yu Xinling , Shi Weijuan , Ji Guoxing
Published: January 2022

Let

ℋ

{\mathcal{ {\mathcal H} }}

be an infinite dimensional complex Hilbert space and

ℬ

(

ℋ

)

{\mathcal{ {\mathcal B} }}\left({\mathcal{ {\mathcal H} }})

the algebra of all bounded linear operators on

ℋ

{\mathcal{ {\mathcal H} }}

. For an operator

T
∈
ℬ

(

ℋ

)

T\in {\mathcal{ {\mathcal B} }}\left({\mathcal{ {\mathcal H} }})

, we say property

(

t

)

\left(t)

holds for

T

T

if

σ

(

T

)

⧹

σ

u
w

(

T

)

=

Π

00

(

T

)

\sigma \left(T)\hspace{-0.08em}\setminus \hspace{-0.08em}{\sigma }_{uw}\left(T)={\Pi }_{00}\left(T)

, where

σ

(

T

)

\sigma \left(T)

and

σ

u
w

(

T

)

{\sigma }_{uw}\left(T)

denote the spectrum and the Weyl essential approximate point spectrum of

T

T

, respectively, and

Π

00

(

T

)

=

{

λ
∈
iso
σ

(

T

)

:
0
<
n

(

T
−
λ

)

<
∞

}

{\Pi }_{00}\left(T)=\left\{\lambda \in {\rm{iso}}\sigma \left(T):0\lt n\left(T-\lambda )\lt \infty \right\}

. In this paper, we consider the stability of property

(

t

)

\left(t)

under (small) compact perturbations. Also, we explore the relations between the stability of property

(

t

)

\left(t)

and the stability of Weyl-type theorems. Moreover, we characterize those operators

T

T

satisfying that property

(

t

)

\left(t)

holds for

f

(

T

)

f\left(T)

for each function

f

f

analytic on some neighborhood of

σ

(

T

)

\sigma \left(T)

.
I wanted to honour your journal, and you spat in my face: emotive (im)politeness and face in the English and Russian blind peer review
Authors: Larina Tatiana , Ponton Douglas Mark
Published: January 2022

This study explores the degree to which politeness and emotive considerations are respected across two different academic traditions and linguistic settings; in Russian and English blind peer reviews. It analyses 120 authentic reviews (70 Russian and 50 British English) with the negative verdicts: “Reject” and “To be resubmitted after substantial revisions” using a pragmatic, contextual and contrastive methodology. Drawing on (im)politeness theory, intercultural pragmatics and cultural studies, we explore the construction of alternative meanings in reviewers’ messages, and theorize that consideration for the face requirements of the reviewee may account for the lingua-cultural choices of the reviewer. We explore structural, linguistic, communicative and stylistic differences in English and Russian reviews. The results show that despite reviewers’ individual styles there are some culture-specific traits in the styles of reviews. Emotive politeness, we have suggested, appears to be (pre)determined by the sociocultural context and is more typical of English communication than Russian. We account for the differences in terms of sociocultural context, value differences and the use of different mechanisms of politeness. Our results confirm that politeness is not only social, but is also a psychological phenomenon based on empathy, whose manifestations may vary across cultures.
ORFISMO ENTRE A RELIGIÃO E A ARTE
Authors: Valadas das Neves Sérgio Manuel
Published: January 2022

Este artículo tiene como objetivo reflexionar sobre el orfismo en sus dos concepciones, religiosa y artística, y en sus tres significados: el mito de Orfeo; el culto órfico; y el movimiento artístico, el orfismo, del siglo XX. Esta investigación no buscará describir en detalle el culto órfico y el movimiento artístico, sino buscar las razones que llevaron a Guillaume Apollinaire a llamar a esta rama del orfismo cubista, y presentar algunas hipótesis que conducen a una exploración más profunda del tema. Para establecer estas relaciones, se utiliza principalmente la investigación sobre las antiguas religiones griegas del historiador y antropólogo Jean-Pierre Vernant y el filósofo Algis Uždavinys; las notas sobre estética de Guillaume Apollinaire, Pierre Francastel y Robert Delaunay; y las obras de Sonia y Robert Delaunay, Guillaume Apollinaire y Frantisek Kupka. El puente establecido trata sobre características pictóricas y su simbolismo, como el lirismo atribuido, el color, la luz, las formas, el ritmo y el movimiento, y los efectos que estos elementos tienen en los artistas y el público, que pueden estar relacionados con Mito de Orfeo y prácticas órficas. La música de Orfeo que se siente en la pintura.
DA ARTE E DA TÉCNICA: OS DESENHOS COMO FONTE DE INFORMAÇÃO DA PRÁTICA ARTÍSTICA. A OFICINA DOS VALADIER, OURIVES ROMANOS DOS SÉCULOS XVIII E XIX
Authors: Vale Teresa Leonor
Published: January 2022

Do ponto de vista do historiador de arte, um desenho constitui-se normalmente como uma obra de arte objecto do seu estudo. No presente texto, contudo, propomo-nos sobretudo efectuar, para além de reconhecer a presença e o papel desempenhado pelo desenho no âmbito da oficina dos Valadier, ourives e fundidores romanos activos nos séculos XVIII e XIX, uma aproximação a alguns desenhos na sua qualidade de fonte de informação relativamente a práticas e técnicas no contexto da oficina.
La importancia del emprendimiento en la comunidad sorda peruana
Authors: Quijada Lovaton Karin Janett
Published: January 2022

El emprendimiento es un factor primordial para el desarrollo económico del país, y su aporte en la comunidad sorda tiene un significado relevante. En el Perú, el 7.6% total de la población con discapacidad sufren de sordera; sin embargo, no todas las personas sordas acceden a un empleo digno, ya que no cuentan con estudios de educación básica y superior por encontrarse con grandes barreras de comunicación. En tal sentido, la investigación da a conocer la importancia de los emprendimientos de las personas sordas como un reto para la inclusión laboral mediante el uso de la lengua de señas peruana. En este artículo se hace un análisis de revisión literaria desde diferentes autores, que ayuda a evidenciar el estudio del emprendimiento en los distintos aspectos: económico, psicológico, sociológico y gestión empresarial. En conclusión, para lograr el éxito del emprendimiento en la comunidad sorda peruana debemos sensibilizar la accesibilidad en la comunicación como una herramienta para facilitar su interacción con la sociedad; por ende, las entidades públicas y privadas del sector empresarial deben promover emprendimientos para este colectivo.
La creciente importancia de las relaciones económicas entre China y América Latina. El caso peruano
Authors: Cornejo Ramírez Enrique Javier
Published: January 2022

Este artículo revisa los antecedentes de las relaciones comerciales de China con el mundo, el proceso de apertura que se dio a partir de la década de los setenta del Siglo XX y los profundos cambios que se vienen dando en las primeras décadas del Siglo XXI, con una guerra comercial entre Estados Unidos y China y con el avance que vienen teniendo la economía y las empresas chinas en sectores como energía y tecnología de comunicaciones. El artículo también revisa las relaciones comerciales y económicas entre China y los países de América Latina y el Caribe, poniendo un énfasis especial en el caso del Perú, donde China ya es el primer socio comercial tanto en exportaciones como en importaciones. Se señala la preocupación porque los países de la región están exportando a China fundamentalmente productos básicos como minerales y alimentos, por lo que es necesario lograr un intercambio más equitativo y con mayor valor agregado.
Control Emocional, Preocupación por la Covid-19 y Comportamiento del Consumidor en la Población Limeña
Authors: Torres Lajo Manuel , Torres Valladares Manuel , Tinoco Gómez Oscar
Published: January 2022

Esta investigación tiene como objetivo establecer si el control emocional, la preocupación por la COVID-19 y el comportamiento del consumidor se encuentran vinculados entre sí; así como establecer las actitudes de la población de Lima, Perú, frente a la pandemia y sus hábitos de consumo. Se elaboraron tres cuestionarios bajo un formato digital, que fueron resueltos por 663 sujetos de Lima. Los resultados muestran que existe una relación significativa entre control emocional y la preocupación por la COVID-19, pero no así entre dicha preocupación y el comportamiento del consumidor. En cambio, los resultados descriptivos sí muestran cambios en el comportamiento del consumidor como resultado de la pandemia. Estos resultados permiten concluir que, a pesar de que la COVID-19 sigue siendo una preocupación para los pobladores, es muy probable que se haya controlado el temor inicial, sea por adaptación a la nueva normalidad, o por la necesidad imperiosa de salir a trabajar para sobrevivir.
Revisión sistemática sobre la prevalencia del síndrome de Burnout en el sector académico
Authors: Choy Vessoni Rosana Aurora , Prieto Molinari Diego Eduardo
Published: January 2022

El síndrome de burnout tiene efectos negativos en los colaboradores de distintos sectores. No obstante, poco se afirma en relación a su prevalencia específica en el sector educativo. El presente estudio buscó definir la prevalencia del burnout en docentes y estudiantes según lo presentado por la literatura. Para ello, se realizó una revisión sistemática de investigaciones que reportan su prevalencia en el sector educativo, tanto para docentes como para estudiantes. Se obtuvo 1547 referencias únicas, de las cuales solo 59 reportaron adecuadamente información sobre prevalencia del síndrome de burnout en la población de interés. La proporción de niveles altos de cada dimensión mostró ser más elevada en estudiantes que en docentes. No obstante, la prevalencia del síndrome mostró resultados opuestos, siendo más frecuente en docentes (Mediana = 19.8%) que en estudiantes (Mediana = 14.4%). El estudio del burnout se ve afectado por algunas limitaciones; en particular, respecto al uso de instrumentos y puntos de corte. No obstante, la alta prevalencia de este problema en docentes y estudiantes es suficiente evidencia para profundizar el estudio de sus consecuencias en este sector específico.