bluuebunny/crossref_metadata_2025 huggingface dataset:
Comparison of Double Jersey Knitted Fabrics Made of Regenerated Cellulose Conventional and Unconventional Yarns
Authors: Kopitar Dragana , Pavlovic Zeljka , Skenderi Zenun , Vrljicak Zlatko
Published: February 2022

The development of new spinning technologies has produced cheaper yarns and with it, research into the production and application of woven and knitted fabrics from unconventional yarns. The tensile properties of knitted fabrics made of regenerated cellulose fibres (viscose, Tencel™ and modal) of the same count (20 tex) using ring, rotor and air-jet spun yarn were studied. The force/elongation diagram was analysed in order to detect elastic and plastic areas as well as the area of elastoplastic deformations responsible for the behaviour of knitted fabrics. The yarn raw material affects the elastic area of knitted fabrics made from different yarn structures in the course direction whereby the highest elastic area was obtained in the case of ring spun yarns followed by air-jet and finally rotor spun yarns. Regardless of the raw material, the elastoplastic area of the knitted fabric in the wale direction is the lowest for ring spun yarns. There is no visible trend of knitted fabric elastoplastic areas in the wale direction regarding the yarn type and raw material.
Veränderungen beim Wohnen und von Standortpräferenzen durch Homeoffice in der Covid-19-Pandemie?
Authors: Neumann Ute , Spellerberg Annette , Eichholz Lutz
Published: March 2022

With the shift of the workplace to the private home in the Covid-19-pandemic, the sphere of gainful employment has more or less abruptly invaded the private sphere and has not only led to necessary adaptations in houses and flats, but has also raised new questions about the attractiveness of residential locations. Based on the results of an online survey, this paper examines the influence of home office on housing and settlement structures. Considerations of co-working spaces, another form of mobile work, are also included in the analyses. The aim of the paper is to contribute to the discussionabout the attractiveness of residential locations and the consequences of mobile working for housing behaviour. The results show: Contrary to what media discussions suggest, no clear effects on location preferences or a ‘new desire for thecountryside’ can be identified (so far). Furthermore, there is an increased willingness to move, especially in flats that are perceived as too small; dissatisfaction with the flat is higher among respondents with little space. Co-working Spaces donot yet play a role, but respondents with a preference for flexible forms of work are considering them.
Apiaí’s popular Brazilian ceramics: cultural heritage preservation through a technical approach
Authors: Marques Ayres Calaresi Anna Carolina , Marques Ayres da Silva Anna Luiza
Published: February 2022

The present study aims to relate clays’ technical aspects to the traditional popular ceramics manufacture carried out for generations by the Association of Artisans of Apiaí artisans in Vale do Ribeira (Brazil). The Vale do Ribeira is considered a cultural and natural World Heritage site by UNESCO. The clays’ chemical-mineralogical, technological, and ceramic properties were important in defining the aesthetic characteristics of artistic work and in selecting of a specific execution method. The methodology comprises extensive bibliographic research; field visits for data and clay samples collection to survey their characteristics in the laboratory, and the comparison of results. Adequacy between experimentation and technical knowledge was proven. This study is also expected to help disseminate and enhance Apiaí’s artistic, cultural, and historical heritage and encourage the development of public policies for cultural preservation in Vale do Ribeira.
Analisis Situasi Masalah Kesehatan Penyakit Menular di Provinsi Kalimantan Barat
Authors: Luqman Luqman , Sudaryo Mondastri Korib , Suprayogi Antonius
Published: March 2022

Background: Health problems in West Kalimantan are dominated by infectious diseases based on health data showing that the list of the top 10 diseases is dominated by infectious diseases, the CFR rate is still quite high and outbreaks routinely occur due to infectious diseases. The purpose of the situation analysis is to determine priorities for infectious disease problems in West Kalimantan in 2019.Methods: This research was conducted from December 2020 to February 2021 in West Kalimantan Province. The research method used is an assessment method whose results will be presented descriptively with quantitative and qualitative approaches. Determining the priority of the problem using the PAHO-Adapted Hanlon method with assessment criteria based on the size of the problem, seriousness of the problem, intervention effectiveness, inequity and institutional factors by means of interviews with related parties within the West Kalimantan Provincial Health Office.Result: The results of the analysis of infectious disease problems in West Kalimantan Province show that the top 10 diseases are still dominated by infectious diseases such as diarrhea, TB and DHF. The CFR figure which is still quite high is contributed by TB, HIV/AIDS, diphtheria and DHF. In this study, TB was selected as a priority health problem because it obtained the highest PAHO score of 25.16. TB is still a major problem because case finding has not reached the national target of 80%, there is still transmission in the community and cases of TB in children are still quite high.Conclusion: Tuberculosis is a priority infectious disease problem in West Kalimantan. TB is the first priority problem in this study because case finding is not optimal, there is transmission in the community and there are still cases of TB in children. It is hoped that with monitoring and evaluation of training for cadres and health workers, screening of TB patients can be more massive and sensitive for providing complete TB treatment.
Hubungan Kualitas Tidur dengan Kontrol Glikemik pada Penderita Diabetes Melitus : Systematic Review
Authors: Azizah Ulfa Nur , Wurjanto Moh Arie , Kusariana Nissa , Susanto Henry Setyawan
Published: March 2022

Background: People with Diabetes Mellitus often wake up at night to urinate, thereby reducing the quality of sleep. Sleep quality is related to HbA1c levels. There are many studies regarding the relationship between sleep quality and glycemic control with the results that there is a relationship or no relationship.Methods: This study uses the Systematic Review method with PRISMA guidelines without meta-analysis. Databases used: ScienceDirect, PubMed, Scopus and Portal Garuda. The selected articles were critically assessed with Joanna Briggs Institute questionnaire.Result: There were 17 articles deserved to be analyzed. Many studies state that there is a relationship between global PSQI scores and sleep duration with HbA1c. PSQI is a predictor of HbA1c. The relationship between sleep duration and HbA1c is U-shaped.Conclusion : This study shows that sleep quality is related to glycemic control.
Faktor-Faktor yang Berhubungan dengan Kejadian Coronavirus Disease 2019 (COVID-19) di Provinsi Jawa Tengah
Authors: Damayanti Rahmita , Sutiningsih Dwi , Kusariana Nissa , Hestiningsih Retno
Published: March 2022

Background: Coronavirus Disease 2019 (COVID-19) is a global pandemic disease which attacked respiratory organ and caused by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). Central Java is the third-ranked province with the most positive COVID-19 cases in Indonesia and is still experiencing additional cases until December 2021. Central Java has also been the province with the highest number of COVID-19 red zones in Indonesia. Factors related to COVID-19 have to be known so the efforts to prevent COVID-19 can be carried out effectively and the risks of infection can be decreased. This study aims to analyze the factors related to COVID-19 infections of Central Java population.Methods: This research is an analytical study with a cross sectional approach. The research method is quantitative. The research samples were 200 citizens of Central Java Province. The sampling technique was proportional to size sampling. This study used a questionnaire for data collection.Result: The results of the research show that the factors related to COVID-19 infections are sex (p-value = 0.007), smoking status (p-value = 0.017), comorbidity status (p-value = 0.000), alcohol consumption behavior (p-value = 0.000), and preventive practice of COVID-19 (p-value = 0.001).Conclusion : It can be concluded that sex, smoking status, comorbidity status, alcohol consumption behavior, and preventive practice of COVID-19 are factors related to COVID-19 infections.
Pemanfaatan Arang Aktif Tempurung Kelapa (Cocos nucifera) untuk Mengikat Kromium (Cr) (Study Pada Limbah Cair Batik)
Authors: A`yunina Ulva , Moelyaningrum Anita Dewi , Ellyke Ellyke
Published: February 2022

Latar Belakang: Logam berat kromium (Cr) dapat menurunkan kualitas lingkungan yang berdampak pada kesehatan manusia. Sumber Cr sering berasal dari proses pewarnaan industri batik yang keluar melalui lingkungan.  Limbah tempurung kelapa dapat dijadikan arang aktif  yang berpotensi mengikat cemaran. Penelitian ini bertujuan untuk menganalisis penurunan kromium pada air dengan pemanfaatan limbah  arang aktif tempurung kelapa.Metode: Sampel adalah  air yang mengandung Cr dikontakkan dengan arang tempurung kelapa selama 60 menit, dimana terdiri dari kelompok kontrol (K) 0g/0,5L dan kelompok perlakuan 35g/0,5L (P1), 40g/0,5L (P2), dan 45g/0,5L(P3). Metode penelitian menggunakan true experiment dengan desain penelitian post-only control group design dan menggunakan Rancangan Acak Lengkap dengan enam kali pengulangan setiap kelompok. Data dianalisa menggunakan SPSS 20 dengan uji homogenitas Saphiro wilk dilanjutkan dengan one-way ANOVA. Kandungan kromium pada air di ukur dengan metode Atomic Absorption Spectrophometry (AAS).Hasil: Rerata kadar kromium pada kelompok kontrol (K) sebesar 0,04117 mg/L; kelompok 0,03069 mg/L (P1); 0,02061 mg/L (P2), dan 0,01090 mg/L (P3). Terdapat perbedaan yang signifikan (p<0,05) antara kelompok kontrol (K) dengan kelompok perlakuan.Simpulan: Arang aktif tempurung kelapa  dapat menurunkan kadar kromium pada air. Semakin banyak arang aktif tempurung kelapa yang dikontakkan maka semakin menurun kadar kromium dalam air. ABSTRACT Title: The Utilitation of Coconut Shell Activated Charcoal (Cocos nucifera)  to Binding  the Chromium (Cr) In the Water (Study in Batik Wastewater). Background: Chromium (Cr) can effect the environment and effected on human health. Chromium can emit from batik industries because of colouring proceses. The coconut shell activated charcoal may binding the pollution. This aims of the study is analyze the the coconut shell activated charcoal to binding chromium levels in batik wastewater.Method: Samples consisted of the control group (K) is 0g / 0.5L, the first treatment group (T1) was 35g / 0.5L; 40g / 0.5L (T2), and 45g / 0.5L (T3) which contacted 60 minute. The method in this research is true experiment with post-only control group design and a completely randomized design with six times of repetitions. Data were analyzes with SPPS 20, analysis with saphiro wilk and one-way ANOVA. The Atomic Absorption Spectrophometry (AAS) method using to identified the chromium in the water.Result: The average chromium in control group (K) was 0.04117 mg / L, treatment 1 (P1) was 0.03069 mg / L, treatment2  (P2) was 0.02061 mg / L, and treatment3 (P3) was 0.01090 mg / L. There were sig correlation (p<0,05) between control group (K) and treatment groups.  Conclution: Coconut Shell Activated Charcoal (Cocos nucifera) can binding the chromium in the water.
Halaman Sampul
Authors: Editor Editor
Published: February 2022

Cover, Dewan Redaksi, Daftar Isi
Halaman Belakang
Authors: Editor Editor
Published: February 2022

Cover Belakang
ANALISIS KETERSEDIAAN LOKASI PEMUKIMAN BERBASIS MITIGASI LONGSOR
Authors: Sudarto Arif , Utami Westi
Published: March 2022

Pertumbuhan penduduk serta keterbatasan lahan untuk permukiman mengakibatkan sebagian masyarakat membangun permukiman pada lokasi rawan bencana. Penelitian ini bertujuan memetakan potensi lokasi permukiman berdasarkan peruntukan ruang serta aman dari ancaman longsor. Metode penelitian dilaksanakan melalui analisis spasial dengan melakukan overlay peta serta pemberian skoring dan pembobotan. Variabel fisik yang digunakan meliputi kemiringan tanah, drainase, erosi, penggunaan lahan, aksesibilitas jalan, aksesibilitas tempat penting dan kerawanan bencana longsor. Prioritas lokasi permukiman ditentukan berdasarkan kesesuaian secara fisik dan ketersediaan lokasi menurut rencana tata ruang wilayah (RTRW). Hasil analisis kesesuaian lokasi secara fisik untuk permukiman di Kecamatan Ngargoyoso menunjukkan terdapat 28,99% area sesuai untuk pemukiman, 38,83% sesuai bersyarat dan 32,18% tidak sesuai.  Sementara berdasarkan ketersediaan lokasi untuk permukiman dan kesesuaian dengan RTRW, lokasi yang tersedia untuk permukiman dikelaskan menjadi lokasi tersedia (I) seluas 788,28 Ha dan lokasi tersedia (II) seluas 351,62 Ha. Pemetaan ketersediaan lokasi pemukiman diharapkan mampu memberikan arahan kepada masyarakat agar dapat bermukim pada wilayah aman dari bencana dan sesuai dengan RTRW.
WHEN DID ZAMBIA START GOING GREEN?
Authors: Zulu Kangacepe , Simenti-Phiri Easton
Published: March 2022

Combining a three-pronged document review approach with semi-structured and in-depth interviews, this study provides a critical assessment of the emergence and progression of inclusion of climate change and incidental phenomenon in Zambia’s development policy. Specifically, the study seeks to trace these issues within each and every National Development Plan (NDP) published by the Government since Zambia’s independence in 1964. Results, synthesized from the different data sources, show that NDPs have progressively incorporated environmental issues from as early as the 1960s, with more recent consolidation of climate change and its increased inclusion beginning in the early 2000s. Practical implications of these results are presented in this paper, but mainly suggest: (i) the need to learn from past NDP best practices and contextualise them to the current complexion of the country; (ii) formulation of a handbook of implementation for climate change as an accompanying volume to the NDPs; (iii) importance of determining the climate change-industrial development trade-off; (iv) harnessing the dual correlational effect of international stimuli and domestic political forces on climate change inclusion in NDPs; (v) use of domestically-defined climate change mainstreaming and policy formulation tools; and (vi) adoption of a holistic climate change performance indicator methodology for formulating climate change related KPIs.
Integration of risk analysis methods in aerospace research projects
Authors: Borges Sarah Francisca de Souza , Belderrain Mischel Carmen Neyra , Junior Moacyr Machado Cardoso , Castilho Diogo Silva
Published: March 2022

Organizations are exposed to several types of risks, such as environmental, legal, operational, financial, and technological; that are subjected to epistemic uncertainty. In this context, a contemporary issue is how to deal with accidents, with greater difficulty in understanding the sociotechnical system, due to its complex and dynamic characteristics, in an attempt to prevent accidents based on components’ behavior. Although, for most complex systems and projects, a record of the exposure to hazards is incomplete or nonexistent, especially when it is highly innovative. This study developed a risk analysis framework for complex aerospace research projects by integrating different methods: problem structuring, safety control action analysis, and prioritization of results. Three methods are proposed: (1) Soft Systems Methodology (SSM) for initial review and understanding of the problem situation, and preliminary identification of hazards and losses; (2) Systems-Theoretic Process Analysis (STPA), to identify Unsafe Control Actions (UCAs) and their causal scenarios; and (3), Preferences Sorting Technique by Similarity to Ideal Solution (TOPSIS Fuzzy) for prioritization of the UCAs and mitigating causal scenarios. This proposal was applied to the Liquid Propulsion Injection Systems Laboratory (CEPROS), and, through the SSM, 7 hazards and 4 losses were found. On the other hand, the STPA method found 15 loops with 48 UCAs and 106 causal scenarios. In the end, it is recommended that the Decision Maker establishes a cut-off criterion, that is, a Hierarchy of Management and Control of the identified UCAs. The proposed methods follow the line of sociotechnical systems, considering the difficulty of the decision-maker for risk analysis in aerospace research projects. Thus, this work presents a structure of different methods covering the entire risk management process, increasing the difficulty in fulfilling the mission due to the level of complexity of the project, and supporting strategies for coordinated decision-making.
Social intelligence at work and its implication for organizational identification:
Authors: Develí Alptekin , Pekkan Nazmiye Ülkü , ÇavuŞ Mustafa Fedai
Published: March 2022

Since organizational identification is an important phenomenon for efficiency and productivity of the organization, its relationship with many variables has been examined. However, there is no study in the literature examining the relationship between organizational identification and social intelligence. Grounded in the Strong Ties Approach the object of study is to explore the relationship between social intelligence and organizational identification. Besides, the study aimed to determine whether the level of social intelligence and organizational identification vary or not according to the sector type. The study was designed with a quantitative research pattern and correlational research design. The sample is consisting of 306 public and private sector employees. The survey technique with a convenience sampling method was used to collect the data. The obtained data were investigated through statistical analysis software. Social intelligence has been studied both as a whole and with its dimensions named as social information processing, social skills, and social awareness. According to the regression analysis results; social intelligence as a whole and social skills have a significant and positive contribution to predicting organizational identification. However, the effect of social information processing and social awareness on organizational identification is not significant. Moreover, independent samples t-test suggests that the social intelligence and social skills levels of private-sector employees are higher than the same factor levels of the public sector. However, the level of employees' social information processing, social awareness, and organizational identification does not differ according to the sector type. The research also offers several theoretical and practical implications.
Stromatolites - A life form that has witnessed the entire evolution of our planet
Authors: Petrescu Relly Victoria , Petrescu Florian Ion Tiberiu
Published: March 2022

Life on Earth was born at least 3.7 billion years ago, but since then the number of living things has grown exponentially. Surprisingly, some of the earliest life forms on our planet still exist and not just in fossilized form - stromatolites - a life form that has witnessed the entire evolution of our planet can still be discovered in certain areas of the globe. Stromatolites are living fossils, the oldest life forms on Earth. Their existence spans an incredible period - stromatolites have existed for 75% of the period since the formation of the Solar System. They are defined simply as rock structures built by colonies of microscopic organisms that do photosynthesis. These organisms are known as cyanobacteria. As the soil settled in shallow water, bacteria began to grow on it, joining the sedimentary particles and building additional layers until mounds formed. These constructions of microorganisms in the earth are perhaps the essential element in the emergence of more complex life on earth - through their respiration, they produced and developed oxygen on Earth until it came to form 20% of the Earth's atmosphere. Using the Sun as an energy reservoir, stromatolites have transformed the planet into a place capable of supporting all life forms, simple or complex.
Strategical development of agri-food corporations in the competitive economic space of Ukraine
Authors: Hutorov Andrii , Lupenko Yurii , Ksenofontov Mykhailo , Bakun Yuriy , Vlasenko Tetiana , Sirenko Olena
Published: March 2022

This paper reports a study into the historical and economic preconditions for the strategical development of agri-food corporations in the competitive economic space of Ukraine. Agri-food corporations are determined by us as corporations with a developed system of integration relations that are a non-agricultural enterprise, which produces agricultural products. It has been substantiated that their emergence is not a natural phenomenon but a systematic process of changing the phases of differentiation and integration in the national economy. In this case, the development of agri-food corporations was contributed to by the lack of institutions of effective antitrust control, the diversification of industrial and financial groups, the liberalization of foreign trade, as well as a rent-oriented behavior of economic agents. It has been shown that agri-food corporations currently utilize about a third of agricultural land while the size of some of them exceeds the land-use area of entire regions. At the same time, in terms of agricultural production efficiency, agri-food corporations outperform farms and disintegrated agricultural enterprises, as well as family-owned farms; they have more resources for the innovative development of agricultural production and for investment. Strategical development of agri-food corporations needs to develop its social responsibility in rural areas, intensification of public control over the impact on the agrarian sector, institutional system of state support of export. Under the conditions of the state regulation of monopolies and excessive corporatization of agrarian sector, agri-food corporations should constitute the core of food security in Ukraine, as well as form its competitiveness in foreign agricultural markets.
The Pluralistic Foundations of Conceptual Veiling
Authors: Morley Julia
Published: February 2022

The theoretical foundations of Karthik Ramanna’s “Unreliable Accounts” are investigated, demonstrating the pluralistic approach which underlies his critique of the accountability and governance of the FASB. In particular, I highlight Ramanna’s use of multiple units of analysis and theoretical frameworks in his arguments for the existence of conceptual veiling, but I question the extent to which extent Ramanna’s account can be viewed as a generalisable causal explanation. Finally, avenues for future research are noted.
Infinitely many radial and non-radial sign-changing solutions for Schrödinger equations
Authors: Li Gui-Dong , Li Yong-Yong , Tang Chun-Lei
Published: February 2022

In the present paper, a class of Schrödinger equations is investigated, which can be stated as

−
Δ
u
+
V
(
x
)
u
=
f
(
u
)
,
 
 
 
 
x
∈

ℝ
N

.

- \Delta u + V(x)u = f(u),\;\;\;\;x \in {{\rm{\mathbb R}}^N}.

If the external potential V is radial and coercive, then we give the local Ambrosetti-Rabinowitz super-linear condition on the nonlinearity term f ∈ C(ℝ, ℝ) which assures the problem has not only infinitely many radial sign-changing solutions, but also infinitely many non-radial sign-changing solutions.
Plattformzentrierte Arbeitskoordination im kommerziellen und kooperativen Fahrradkurierwesen
Authors: Schreyer Jasmin , Schrape Jan-Felix
Published: February 2022

Dieser Aufsatz vergleicht den Einsatz digitaler Plattformen in kommerziellen und kooperativen Arbeitszusammenhängen. Auf der Basis zweier qualitativer Fallstudien zu dem automatisierten Arbeitsmanagement in der kommerziellen Gig Economy (Lieferando.de) und der kollektiven Nutzung informationstechnischer Plattformen in kooperativen Projekten (Crow Cycle Courier Collective) diskutieren wir das veränderte Zusammenspiel von technischen und sozialen Strukturierungsleistungen in der Koordination von Arbeit.
Two co-inherited hemoglobin variants revealed by capillary electrophoresis during quantification of glycated hemoglobin
Authors: Antonello Giovanni , Lo Monaco Carlo , Napoli Patrizia , Solimando Daniela , Curcio Cristina , Barberio Giuseppina , Maoggi Sauro , Ivaldi Giovanni , Nigra Marco
Published: February 2022

Objectives

The observation of numerous new structural defects in hemoglobin (Hb) has often been linked to the evolution and development of device technologies used for the separation and quantification of hemoglobin components. However, the increased use of preventive tests for hemoglobinopathies and separative methods to quantify glycated hemoglobin (HbA1c) also contributed to these observations, as demonstrated by the case described here. Our aim is to emphasize that different separative method can provide more useful information in patient management.

Methods

A 64-year-old diabetic woman of Moroccan descent was examined in the context of HbA1c monitoring. The test was performed using high performance liquid chromatography (HPLC) and capillary electrophoresis (CE) systems. Molecular characterization was performed by direct sequencing of the β and α globin genes.

Results

The two methods used showed the presence of an anomalous fraction identified as HbS, already observed previously, but only through CE it was possible to observe the presence of another variant and its hybrid components. Direct sequencing of β and α globin genes confirmed heterozygous HbS [β6 (A3) Glu→Val; HBB: c.20A>T] and allowed to identify a mutation on the α
2, [α114 (GH2) Pro→Leu gene; HBA2: c.344C>T] corresponding to the rare Hb Nouakchott variant.

Conclusions

The two Hb variants highlighted by the EC and the molecular characterization therefore allowed adequate advice, the correct assessment of HbA1c and metabolic status and therefore better clinical management of the patient. The availability of different instruments in the same laboratory, confirming situations of diagnostic uncertainty, represents a valuable opportunity that should be encouraged.
SIKM – a smart cryptographic key management framework
Authors: Chaeikar Saman Shojae , Ahmadi Ali , Karamizadeh Sasan , Chaeikar Nakisa Shoja
Published: February 2022

For a secure data transmission in symmetric cryptography, data are encrypted and decrypted using an identical key. The process of creating, distributing, storing, deploying, and finally revoking the symmetric keys is called key management. Many key management schemes are devised that each one is suitable for a specific range of applications. However, these schemes have some common drawbacks like the hardness of key generation and distribution, key storage, attacks, and traffic load. In this article, a key management framework is proposed, which is attack resistant and transforms the current customary key management workflow to enhance security and reduce weaknesses. The main features of the proposed framework are eliminating key storage, smart attack resistant feature, reducing multiple-times key distribution to just one-time interpreter distribution, and having short key intervals – minutely, hourly, and daily. Moreover, the key revocation process happens automatically and with no revocation call.
Simultaneous supersingular reductions of CM elliptic curves
Authors: Aka Menny , Luethi Manuel , Michel Philippe , Wieser Andreas
Published: February 2022

We study the simultaneous reductions at several supersingular primes of elliptic curves with complex multiplication.
We show – under additional congruence assumptions on the CM order – that the reductions are surjective (and even become equidistributed) on the product of supersingular loci when the discriminant of the order becomes large.
This variant of the equidistribution theorems of Duke and Cornut–Vatsal is an(other) application of the recent work of Einsiedler and Lindenstrauss on the
classification of joinings of higher-rank diagonalizable actions.
Connectedness of Kisin varieties associated to absolutely irreducible Galois representations
Authors: Chen Miaofen , Nie Sian
Published: February 2022

We consider the Kisin variety associated to ann-dimensional absolutely irreducible modpGalois representationρ¯{\bar{\rho}}of ap-adic fieldKtogether with a cocharacter μ. Kisin conjectured that the Kisin variety is connected in this case. We show that Kisin’s conjecture holds ifKis totally ramified withn=3{n=3}or μ is of a very particular form. As an application, we get a connectedness result for the deformation ring associated toρ¯{\bar{\rho}}of given Hodge–Tate weights. We also give counterexamples to show Kisin’s conjecture does not hold in general.
Robust numerical method for singularly perturbed differential equations with large delay
Authors: Abdulla Murad Ibrahim , Duressa Gemechis File , Debela Habtamu Garoma
Published: February 2022

In this paper, a singularly perturbed differential equation with a large delay is considered. The considered problem contains a large delay parameter on the reaction term. The solution of the problem exhibits the interior layer due to the delay parameter and the strong right boundary layer due to the small perturbation parameter ε. The resulting singularly perturbed problem is solved using the fitted non-polynomial spline method. The stability and parameter uniform convergence of the proposed method is proved. To validate the applicability of the scheme, two model problems of the variable coefficient are considered for numerical experimentation.
Kolaviron ameliorates chronic unpredictable mild stress-induced anxiety and depression: involvement of the HPA axis, antioxidant defense system, cholinergic, and BDNF signaling
Authors: Ishola Ismail O. , Olubodun-Obadun Taiwo G. , Bakre Oluwasayo A. , Ojo Emmanuel S. , Adeyemi Olufunmilayo O.
Published: February 2022

Objectives

This study sought to investigate the beneficial effect of kolaviron (KV) (a biflavonoid) isolated from Garcinia kola seed on chronic unpredictable mild stress (CUMS)-induced anxiety- and depressive-like behavior.

Methods

Male albino mice were randomly divided into six groups (n=8) as follows; Group I: vehicle-control unstressed; Group II: CUMS-control; Group III-V: CUMS + KV 1, 5 or 50 mg/kg, respectively, Group VI: KV (50 mg/kg, p.o.) unstressed mice. Animals were subjected to CUMS for 14 days, followed by estimation of depressive- and anxiety-like behavior from days 14–16. This was followed by biochemical assays for oxidative stress, hypothalamo-pituitary axis, cholinergic, and BDNF signaling.

Results

CUMS caused significant reduction in time spent in open arms of elevated plus maze test (EPM) and increase in immobility time in tail suspension test (TST) and forced swim test (FST) ameliorated by KV treatments. KV administration also attenuated CUMS-induced malondialdehyde/nitrite generation and decrease in antioxidant enzymes activities in the prefrontal cortex and hippocampus. CUMS increased serum corticosterone, acetylcholinesterase activity, and reduced BDNF level in the PFC and hippocampus were attenuated by KV administration.

Conclusions

KV prevented CUMS induced anxiety- and depression-like behavior in mice through enhancement of antioxidant defense mechanisms, neurotrophic factors, and cholinergic systems.
Evaluation of the stability of furosemide in tablet form during six-month storage in spaceflight and peculiarities of its pharmacokinetics and pharmacodynamics under conditions of anti-orthostatic hypokinesia
Authors: Polyakov Alexey V. , Svistunov Andreу A. , Kondratenko Svetlana N. , Kovachevich Irina V. , Repenkovа Lyudmila G. , Savelyevа Marina I. , Shikh Evgenia V. , Noskov Victor B.
Published: February 2022

Objectives

The present study investigated the stability of furosemide under space-flight conditions on board the International Space Station, as well as its pharmacokinetics and pharmacodynamics under conditions simulating exposure to some space-flight factors.

Methods

Quantitative analysis of furosemide tablets by HPLC was performed before spaceflight (background), then after six months storage under normal ground conditions (control) and under spaceflight conditions (SF). The pharmacokinetics and pharmacodynamics of furosemide were studied in six healthy volunteers after a single oral dose of 40 mg under normal conditions (background) and under anti-orthostatic hypokinesia (ANOH).

Results

Quantitative content of furosemide in tablets before SF was 40.19 ± 0.28 mg (100.47 ± 0.71%), after 6 months storage: under normal conditions (control) – 39.9 ± 0.39 mg (99.73 ± 0.98%), under SF – 39.24 ± 0.72 mg (98.11 ± 1.80%), which was within the prescribed limits. Studying basic hemodynamic parameters showed that in ANOH conditions 6 h after furosemide administration there was a statistically significant increase of the stroke volume (SV) (+36.5 Δ%), a tendency for increasing of the stroke index (SI) (+36.5 Δ%) and decreasing of the total peripheral resistance (TPR) (−21.9 Δ%) compared to baseline study.

Conclusions

It has been established that various factors of space flight (overloading, excessive vibration, microgravity, etc.) do not negatively influence the stability of furosemide in tablet form during storage for 6 months on board the International Space Station.
Datura stramonium abrogates depression- and anxiety-like disorders in mice: possible involvement of monoaminergic pathways in its antidepressant activity
Authors: Akanji Murtala A. , Elijah Oyinloye O. , Oyedolapo Alabi A. , Aderonke Aderionla A. , Opeoluwa Ogunjimi L. , Omoloye Adesina A. , Oladoja Farouk A. , Olatundun Shonde O. , Edatomolaosi Osipitan L.
Published: February 2022

Objectives

Ethno-botanical surveys uncovered the use of Datura stramonium in the management of mental health abnormalities. Antidepressant- and anxiolytic-like activities of hydroethanol leaf extract of D. stramonium (HLDS) in mice and its possible mechanism of action were investigated in this study.

Methods

The hole-board test (HBT), open field test (OFT), elevated plus maze test (EPMT), and social interaction test (SIT) were used to investigate the anxiolytic-like activity while forced swim test (FST) and tail suspension test (TST) were employed for the antidepressant effect. Mice were pre-treated orally with purified water (10 mL/kg), bromazepam (1 mg/kg), fluoxetine (20 mg/kg) and D. stramonium (25, 50, 100 and 200 mg/kg). One hour post-treatment, mice were subjected to the various tests.

Results

In HBT, D. stramonium increased the head dips and sectional crossings turnover. D. stramonium increased the number of square crossed and rearings/assisted rearings in OFT. DS increased the time spent in open arms of EPM. In SIT, D. stramonium increased the frequency/duration of interactions. In FST and TST, D. stramonium decreased the duration of immobility which were reversed by doxazosin (α1 adrenoceptor antagonist) and ondasentron (5-HT3 receptor antagonist).

Conclusions

HLDS has anxiolytic- and antidepressant-like activities through modulation of serotoninergic and adrenergic neurotransmissions.
DriVE-MATH: Reimagining Education
Authors: Pinto Carla M.A. , Mendonça Jorge
Published: February 2022

In this paper we provide a description of the project DrIVE-MATH, highlighting the main goals, intellectual outputs, outcomes, the involved partners, and activities and reports from the three-years’ project. At the end we discuss the impact of the new proposed Education models at various levels, from students, to HEIs, to stakeholders.
Impact of Financial Crisis on Economic Growth: A Stochastic Model
Authors: Tadmon Calvin , Njike Tchaptchet Eric Rostand
Published: February 2022

In this paper, we develop a stochastic model to analyze how financial contagion may affect economic activity.
In the deterministic case, we show that, according to specific parameter values, the economy may converge either to a stress-free equilibrium or to a stressed equilibrium: in the former situation, the level of economic growth is maximal, while in the latter, it is reduced by financial contagion.
In the stochastic case, we compute a value around which the level of economic growth oscillates.
Numerical simulations are performed to illustrate theoretical results obtained.
Embedded deformation of the rubble-mound foundation of gravity-type quay walls and influence factors
Authors: Zheng Qingsong
Published: February 2022

In this study, the embedded depths of the rocks of the single-layer placement group and the multilayer riprap group were compared through a self-made test device. Besides, a finite element model of a single layer of regular rocks was developed to probe into the factors that impact the embedded deformation of the rubble-mound foundation of a gravity-type quay wall, including the cohesion and angle of internal friction of foundation soil, as well as the particle size of and the interval between rocks. Research results indicated that it was feasible to replace multilayer randomly dumped rocks with single-layer regularly placed rocks. The embedded depth decreased as the cohesion and angle of internal friction of soil increased. The influence of load on the embedded depth was small when the cohesion was less than 10 kPa or the angle of internal friction was smaller than 40°. When the load was lower than 80 kPa, the impact of the particle size of rocks on the embedded depth would be negligible, and such impact grew along with the load. When the load was below 100 kPa, the interval between rocks exerted relatively minor influence on the embedded depth: under a constant porosity, the embedded depth would decrease as the interval increased, and this correlation became more significant when the load exceeded 800 kPa; under varied porosities, a larger interval would lead to an increased embedded depth but the increase would be limited within a range of 10% of the original depth.
Influence of number and position of measuring points on the nondestructive testing method to predict the flexural modulus of aged wood
Authors: Yang Na , Wang Zhongcheng
Published: February 2022

The purpose of this work was to ascertain the influence of the nondestructive testing (NDT) method, as well as the location and number of measuring points, on the correlation between NDT indices and the flexural modulus (MOE) of small clear specimens of aged wood. The MOE of the Tibetan Populus cathayana specimens sawed from an ancient floor beam were measured, and multiposition NDT was carried out with a stress wave and resistography detector. Unary and multivariate linear methods and the stepwise regression method were used to discuss the correlation between the NDT indices and MOE. The results indicated that the NDT index of M

f
, which combined stress wave velocity and microdrilling resistance, had the highest correlation coefficient (R) with MOE. When the number of measuring points was increased from 2 to 8, R could be increased by up to 180.2%. The stepwise regression method is efficient in determining the optimal combination of variables while avoiding colinearity. Thus, using appropriate NDT indices while considering the texture characteristics of the specimen can effectively improve the MOE prediction accuracy.
Unvermeidbare Maßänderungen durch thermische Spannungen *
Authors: Frerichs F. , Lübben Th. , Hoffmann F. , Zoch H.-W. , Wolff M.
Published: February 2022

Unvermeidbarer Verzug, der in nicht umwandelnden Werkstoffen durch thermische Spannungen während der Abschreckung entsteht, hängt von relativ wenigen Parametern ab: Härtetemperatur, Umgebungstemperatur, Wärmekapazität, Wärmeleitfähigkeit, Dichte, thermische Dehnung, E-Modul, Poisson-Zahl, Streckgrenze und Verfestigungsverhalten. Zusätzlich beeinflussen noch die Form und die Größe des Bauteils den Verzug.

Bisherige Untersuchungen an langen und dünnen Zylindern haben gezeigt, dass es ein typisches Maßänderungsverhalten beim Abschrecken von Zylindern im Gasdüsenfeld gibt, das abhängig von der Biot-Zahl ist. Es stellt sich nunmehr die Frage, wie die anderen Parameter auf den Verzug wirken und wie diese mit der Biot-Zahl zusammenwirken. Mittels einer Dimensionsanalyse konnten die oben genannten 14 Parameter auf neun dimensionslose Kennzahlen reduziert werden. Eine numerische Analyse dieser Kennzahlen hat gezeigt, dass sieben dieser dimensionslosen Kennzahlen den Verzug beeinflussen.
Dephosphorization kinetics of high-P-containing reduced iron produced from oolitic hematite ore
Authors: Liu Liwei , Li Guofeng , Li Yanfeng , Zhao Libing
Published: February 2022

To comprehensively utilize Fe and P in oolitic hematite ore, an innovative method was proposed to enhance P enrichment in the reduced iron during the reduction process. The reduced iron was then converted to low-P-containing molten iron and high-P-containing slag in the presence of CaO–SiO2–FeO–Al2O3 slag. In this study, the P content of the final iron after 0–1,800 s dephosphorization was investigated at different slag composition conditions, and the dephosphorization kinetics of the reduced iron was analyzed. The results showed that the P content of the final iron sample decreased rapidly within 600 s of dephosphorization and became almost constant with increasing dephosphorization time to 1,800 s. The basicity, FeO content, and Al2O3 content also affected the dephosphorization rate of the reduced iron. The apparent dephosphorization rate constant ranged from 1.141 × 10−3 to 2.363 × 10−3 g·(cm2·s)−1, and the overall mass transfer coefficient ranged from 2.47 × 10−3 to 3.38 × 10−3 cm·s−1. The rate-controlling step of the dephosphorization process was the mass transfer of P in both the slag and iron phases. The findings of this study provide a theoretical basis for the utilization of refractory oolitic hematite ore.
Partitioning method of reserve capacity based on spectral clustering considering wind power
Authors: Feng Shuhai , Cheng Haihua , Wang Zhengfeng , Zeng Dan
Published: February 2022

With the rapid development of the power system, the complexity of power system continues to increase. The large-scale of clean energy increases the complexity of the power system structure, which makes the power system’s operating status complex and changeable. To ensure the safety, stability, and economic operation of the power system, the power system needs to maintain a certain spinning reserve capacity and ensure that the reserve is available. The spinning reserve optimization method based on fixed partitions cannot effectively deal with the source-net-load volatility and the line congestion problems caused by wind power. To this aim, this paper proposes a power system reserve capacity partitioning algorithm based on the spectral clustering algorithm considering wind power. First, the energy-reserve joint optimization unit commitment problem is built. Secondly, considering the uncertainty of wind power output and the line N − 1 failure, a risk assessment method for line congestion is established; then the power transfer distribution factor (PTDF) of the congested line is considered as the similarity measure. A method based on the iterative partition method based on spectral clustering is proposed. Finally, the reserve capacity configuration based on the dynamic partition results is determined. The IEEE-118 bus system is used in this paper to verify the proposed method. The results show that the reserve capacity dynamic partition method proposed in this paper determines the number of partitions automatically. Reserve capacity partitions are built reasonably. After the reserve capacity partitions, the availability of spinning reserve capacity is effectively guaranteed.
Melt Conveying in Co-rotating Twin Screw Extruders
Authors: Mours M. , Reinelt D. , Wagner H.-G. , Gilbert N. , Hofmann J.
Published: February 2022

Computational fluid dynamics (CFD) based on a finite-volume method was used to simulate three-dimensional pressure and velocity fields for non-Newtonian fluids in fully filled screw elements in a co-rotating twin screw extruder. The employed method also allows the calculation of temperature fields for non-isothermal flow which requires a non-steady state calculation.

The CFD code was first evaluated on simple flow cases such as flow of a Newtonian or non-Newtonian fluid through a cylindrical die or flow in single screw extruders equipped with different screws. The results agreed very well with analytical calculations (die flow) and experimental results (single screw extruder). In a next step, we wanted to establish the reliability of the numerical results for twin screw extruders by performing experiments on a 40 mm and a 58 mm screw diameter machine. Temperature and pressure distribution along the screw in the fully filled section in front of the die were measured. Melt conveying in several screw elements (different pitches) was studied for different materials (amorphous polystyrene and partially crystalline polypropylene) at various flow rates and screw speeds. It was attempted to measure axial pressure build-up for flow rates from nearly zero to beyond the drag capacity of the specific element. The measured bulk values of pressure were then compared to the corresponding values extracted from the CFD simulation results. So far, only isothermal calculations (at different temperatures) have been performed. The temperature profile along the screw was determined by calculating the energy dissipation in isothermal slices and converting the dissipated energy into internal energy (temperature increase, neglecting heat losses at the wall). General agreement between experimental and numerical results is good.
Viscoplastic Material Modeling for the Stretch Blow Molding Simulation
Authors: Wang S. , Makinouchi A. , Okamoto M. , Kotaka T. , Maeshima M. , Ibe N. , Nakagawa T.
Published: February 2022

In this paper, the viscoplastic material model of PET (polyethylene terephthalate), which is intended to be used in the FEM (finite element method) simulation of stretch blow molding process, has been studied. Material tests of PET were performed with the constant strain rates varying from 0.01 to 1 (1/s), at temperatures ranging from 90 to 150 °C, based on the obtained data a two-stage model was proposed. The proposed model could precisely take into account the effects of strain hardening, strain rate sensitivity, variation of the hardening index, and temperature dependency. This model has been implemented into the nonlinear finite element code PBLOW3D, which is developed in the Riken, and its performance in the stretch blow molding simulation has been studied. It has been demonstrated that the proposed material model provides significant improvements, compared with two existing material models, in the simulation of the blow molding process of PET bottles.
The Effects of Compression Pressure on Injection Compression Molding
Authors: Chen C.-M. , Young W.-B.
Published: February 2022

Injection compression molding incorporates a mold compression action in the postfilling stage to compact the materials. The process is the same as the conventional injection molding in the filling and first stage packing. Packing stage continues until the gate material is frozen or the gate is shut off. Then, a mold compression action is engaged and continues to the end of the molding. With the mold compression, the pressure distribution inside the mold cavity can be uniform and the residual stresses caused by pressure gradients can be minimized. However, due to the non-isothermal cooling process, the compressibility of each place inside the mold cavity was not the same. At some time of the cooling process, the pressure at different points began to deviate from each other. In order to improve the non-uniform compression at later the stage of a ICM process, a two-stage compression method can be used. A disk mold was designed to study the effects of the two-stage compression on the molding product. It was found that less warpage can be obtained with a lower compression force at the second stage. The experimental results also suggested that there existed an optimal compression time that was corresponding to the time before the material solidification.