bluuebunny/crossref_metadata_2025 huggingface dataset:
Arbuscular mycorrhizal fungi inoculum and soil ameliorants enhance the growth of Falcataria moluccana in revegetation of post-silica sand mining land in Sukabumi, Indonesia
Authors: BEKTI HABIB SATRIO , BUDI SRI WILARSO , WIBOWO CAHYO
Published: March 2022

Abstract. Bekti HS, Budi SW, Wibowo C. 2022. Arbuscular mycorrhizal fungi inoculum and soil ameliorants enhance the growth of Falcataria moluccana in revegetation of post-silica sand mining land in Sukabumi, Indonesia. Biodiversitas 23: 1181-1187. Open-pit mining of silica sand caused several negative impacts on the environment, especially inhibited plant growth. MycoSilvi is Arbuscular Mycorrhizal Fungi (AMF) inoculum enriched with Mycorrhizal Helper Bacteria (MHBs) which could increase plant growth and nutrient uptake in degraded soils. A ?eld experiment was conducted to study the growth response of F. moluccana (Miq.) Barneby & JW Grimes seedlings treated with MycoSilvi inoculation and soil ameliorants (lime and compost) in post-silica sand mining land. The experimental design used in this study was a completely randomized block design with a factorial scheme. The results showed that MycoSilvi inoculation combined with soil ameliorant significantly improved plant growth of F. moluccana and assisted plant survival within nine months after transplantation in the field. MycoSilvi inoculation and soil ameliorants also increased the number of bacteria in the soil rhizosphere compared with control treatment. This study indicated that revegetation with MycoSilvi inoculation and soil ameliorants could influence plant establishment and development of microbial soil communities in infertile soils, suggesting that it could be an effective method for further ecological rehabilitation in degraded land areas.
c-D-index at day 11 can predict febrile neutropenia during chemotherapy in acute myeloid leukemia
Authors: Kubo Hiroyuki , Imataki Osamu , Kubo Yukiko Hamasaki , Uemura Makiko
Published: March 2022

Acute myeloid leukemia (AML) often requires long-term intensive chemotherapy for its cure. During chemotherapy, the patient always experiences neutropenia with readings below 500 cells/μL; this is often accompanied by pyrexia with a temperature of more than 101°F. This combination of neutropenia and fever is called febrile neutropenia (FN). A tool to sum up the daily severity of a patient’s neutropenia, the “D-index,” has been validated in some specific clinical settings. In this study, we examined whether the D-index is a useful predictor of the onset of FN. We recruited consecutive patients treated with induction and consolidation chemotherapy for newly diagnosed AML. We gathered all the FN events and their clinical background data retrospectively. Patients’ background, such as pre-existing conditions and disease status before the treatment, were analyzed using multivariate methods. All FN events during chemotherapy were evaluated for infection focus and causative organism. A total cohort of 51 cases (25 women, 26 men; median age 51 years, range 18–74) was analyzed. They displayed 171 neutropenic events (115 FN and 56 afebrile episodes) during chemotherapy, and complete neutropenic events were used in this study. Sensitivity and specificity analysis showed that the most useful cutoff value to predict the onset of FN was a cumulative D-index at day 11 (c-D11-index) of 718. The cumulative incidence of FN during chemotherapy was significantly higher in the group with c-D11-index ≥710 (80%) than in the group with c-D11-index <710 (39%) (P < 0.0001). Through multivariate analysis, the presence of diabetes mellitus and the c-D11-index were extracted as contributing factors to the onset of FN (P = 0.0087 and 0.0002, respectively). In conclusion, we can predict that AML patients receiving chemotherapy will experience the complication of FN when the c-D-index at day 11 is >710, with an odds ratio of 2.1.
Seroepidemiology of SARS-CoV-2 in healthcare personnel working at the largest tertiary COVID-19 referral hospitals in Mexico City
Authors: Dávila-Conn Vanessa , Soto-Nava Maribel , Caro-Vega Yanink N. , Paz-Juárez Héctor E. , García-Esparza Pedro , Tapia-Trejo Daniela , Pérez-García Marissa , Belaunzarán-Zamudio Pablo F. , Reyes-Terán Gustavo , Sierra-Madero Juan G. , Galindo-Fraga Arturo , Ávila-Ríos Santiago
Published: March 2022

Introduction

We performed a longitudinal SARS-CoV-2 seroepidemiological study in healthcare personnel of the two largest tertiary COVID-19 referral hospitals in Mexico City.

Methods

All healthcare personnel, including staff physicians, physicians in training, nurses, laboratory technicians, researchers, students, housekeeping, maintenance, security, and administrative staff were invited to voluntarily participate, after written informed consent. Participants answered a computer-assisted self-administered interview and donated blood samples for antibody testing every three weeks from October 2020 to June 2021.

Results

A total of 883 participants (out of 3639 registered employees) contributed with at least one blood sample. The median age was 36 years (interquartile range: 28–46) and 70% were women. The most common occupations were nurse (28%), physician (24%), and administrative staff (22%). Two hundred and ninety participants (32.8%) had a positive-test result in any of the visits, yielding an overall adjusted prevalence of 33.5% for the whole study-period. Two hundred and thirty-five positive tests were identified at the baseline visit (prevalent cases), the remaining 55 positive tests were incident cases. Prevalent cases showed associations with both occupational (institution 2 vs. 1: adjusted odds ratio [aOR] = 2.24, 95% confidence interval [CI]: 1.54–3.25; laboratory technician vs. physician: aOR = 4.38, 95% CI: 1.75–10.93) and community (municipality of residence Xochimilco vs. Tlalpan: aOR = 2.03, 95% CI: 1.09–3.79) risk-factors. The incidence rate was 3.0 cases per 100 person-months. Incident cases were associated with community-acquired risk, due to contact with suspect/confirmed COVID-19 cases (HR = 2.45, 95% CI: 1.21–5.00).

Conclusions

We observed that between October 2020 and June 2021, healthcare workers of the two largest tertiary COVID-19 referral centers in Mexico City had similar level of exposure to SARS-CoV-2 than the general population. Most variables associated with exposure in this setting pointed toward community rather than occupational risk. Our observations are consistent with successful occupational medicine programs for SARS-CoV-2 infection control in the participating institutions but suggest the need to strengthen mitigation strategies in the community.
Genotyping of familial Mediterranean fever gene (MEFV)—Single nucleotide polymorphism—Comparison of Nanopore with conventional Sanger sequencing
Authors: Schmidt Jonas , Berghaus Sandro , Blessing Frithjof , Herbeck Holger , Blessing Josef , Schierack Peter , Rödiger Stefan , Roggenbuck Dirk , Wenzel Folker
Published: March 2022

Background

Through continuous innovation and improvement, Nanopore sequencing has become a powerful technology. Because of its fast processing time, low cost, and ability to generate long reads, this sequencing technique would be particularly suitable for clinical diagnostics. However, its raw data accuracy is inferior in contrast to other sequencing technologies. This constraint still results in limited use of Nanopore sequencing in the field of clinical diagnostics and requires further validation and IVD certification.

Methods

We evaluated the performance of latest Nanopore sequencing in combination with a dedicated data-analysis pipeline for single nucleotide polymorphism (SNP) genotyping of the familial Mediterranean fever gene (MEFV) by amplicon sequencing of 47 clinical samples. Mutations in MEFV are associated with Mediterranean fever, a hereditary periodic fever syndrome. Conventional Sanger sequencing, which is commonly applied in clinical genetic diagnostics, was used as a reference method.

Results

Nanopore sequencing enabled the sequencing of 10 target regions within MEFV with high read depth (median read depth 7565x) in all samples and identified a total of 435 SNPs in the whole sample collective, of which 29 were unique. Comparison of both sequencing workflows showed a near perfect agreement with no false negative calls. Precision, Recall, and F1-Score of the Nanopore sequencing workflow were > 0.99, respectively.

Conclusions

These results demonstrated the great potential of current Nanopore sequencing for application in clinical diagnostics, at least for SNP genotyping by amplicon sequencing. Other more complex applications, especially structural variant identification, require further in-depth clinical validation.
Yhteistyömallit metsäpalvelu- ja luonnontuotealan yrityksissä
Authors: Hamunen Katri , Jahkonen Miina , Kurttila Mikko
Published: March 2022

Metsistä saatavia luonnonvaroja liiketoiminnassaan hyödyntävien yritysten rooli on Suomessa merkittävä sekä maaseutualueiden elinvoimaisuuden että luonnonvarojen kestävän käytön kannalta. Etenkin pienillä yrityksillä keskinäinen yhteistyö ja kumppanuusverkostot ovat tärkeitä kannattavuutta ja innovointia mahdollistavia tekijöitä. Tässä tutkimuksessa kartoitetaan metsäpalvelu- ja luonnontuotealoilla toimivien yritysten yhteistyömalleja ja tunnistetaan yhteistyön syntyä ja yritysten yhteistyöstä saamia hyötyjä. Tutkimus auttaa tarkastelemaan sitä, miten yhteistyön kehittämisessä on onnistuttu ja mihin suuntaan kehitystyötä olisi jatkettava. Aineisto koostuu vuosina 2019–2020 tehtyjen Suomen metsäkeskuksen yritysasiakasneuvojien (n = 15), yrittäjien ja muiden yhteistyöstä vastuussa olevien toimijoiden haastatteluista (metsäpalveluala n = 17, luonnontuoteala n = 17). Löytyneitä yhteistyöesimerkkejä analysoitiin laadullisesti luokittelemalla esimerkit vertikaalisiin ja horisontaalisiin sekä luokittelemalla horisontaaliset esimerkit niiden intensiteetin mukaan. Vertikaalisella yhteistyöllä tarkoitetaan yhteistyötä tuotantoketjussa muilla tasoilla toimivien yritysten kanssa. Horisontaalinen yhteistyö kuvaa yhteistyötä samalla tuotantoketjun tasolla olevien toimijoiden kanssa. Vaikka tutkimuksessa pyrittiin löytämään etenkin horisontaalista yhteistyötä, monessa luonnontuotealalta löytyneessä esimerkissä tuotantoketjua ja verkostoa ollaan vasta rakentamassa, ja monet löytyneet yhteistyöesimerkit toimivat vertikaalisesti ja keskittyvät luonnontuotteen keruun organisointiin ja toimittamiseen tuotantoketjussa eteenpäin. Horisontaalisesta yhteistyöstä on luonnontuotealalla saatu hyötyä esimerkiksi kone- ja laiteinvestointeihin sekä jälleenmyyntiin. Metsäpalvelualalta löytyi horisontaalisia yhteistyöesimerkkejä, joissa on toteutunut alan aiemmissa kehittämishankkeissa kaavailtu projektiryhmämäisesti toimiva pura-ja-kokoa -malli, missä yhteistyötä tekevät yritykset valitsevat keskuudestaan kuhunkin urakkaan sopivimman kokoonpanon. Tulokset osoittavat, että kehittämisrenkaita intensiivisemmät horisontaalisen yhteistyön mallit, kuten yhdistykset, osuuskunnat, yhteiset tapahtumat, hankkeet ja tuotteet tuovat yrityksille näkyvyyttä, tasaisempaa työllisyyttä ja vertaistukea. Intensiivinen yhteistyö vaatii yrityksiltä keskinäistä luottamusta, tehokasta dialogia, säännöllisiä kokoontumisia ja yhteistä nimeä. Ulkopuoliset tahot, kuten Metsäkeskuksen yritysneuvojat, ovat merkittävässä roolissa saattamassa yrittäjiä yhteistyön alkuun, ja jatkossa tältä taholta tarvitaan taitoa tukea yhteistyön kehittymistä.
Recognition System Using the Local Binary Pattern Method and Support Vector Machine to Detect Outdoor Parking Spaces
Authors: Rakha Mochamad
Published: March 2022

The increase in the volume of vehicles causes the parking quota in a parking lot to decrease and the density in the parking slots makes it difficult for visitors to find empty parking slots, which will waste time in searching for parking spaces. Researchers use Gamma Correction, Gaussian Blur, Local Binary Pattern . methods Rotation Invariant Uniform and Support Vector Machine with Gaussian Blur parameter settings using no kernel, Gamma Correction using gamma = 15, Local Binary Pattern Rotation Invariant Uniform P=8 and R=1 and Support Vector Machine kernel RBF getting an accuracy value of 99.52% better than journals [3] by method 𝑳𝑷𝑸𝒖 98.90% accuracy and 𝑳𝑩𝑷𝒓𝒊𝒖𝟐 with 82.78% accuracy.
Optimal Design of Clinical Trials of Dietary Interventions in Disorders of Gut-Brain Interaction
Authors: Staudacher Heidi M. , Yao Chu Kion , Chey William D. , Whelan Kevin
Published: March 2022

There is accumulating evidence for the fundamental role of diet in the integrated care of disorders of gut-brain interaction. Food is a complex mixture of components with individual, synergistic, and antagonistic effects, compared with the relative purity of a pharmaceutical. Food is also an inherent part of individuals' daily lives, and food choice is strongly tied to food preferences, personal beliefs, cultural and religious practices, and economic status, which can influence its ability to function as a therapeutic intervention. Hence, randomized controlled trials of dietary interventions carry unique methodological complexities that are not applicable to pharmaceutical trials that if disregarded can pose significant risk to trial quality. The challenges of designing and delivering the dietary intervention depend on the type of intervention (i.e., nutrient vs food supplementation or whole-diet intervention). Furthermore, there are multiple modes of delivery of dietary interventions, each with their own advantages (e.g., the high precision of feeding trials and the strong clinical applicability of dietary counseling trials). Randomized placebo-controlled trials of dietary interventions are possible with sufficient attention to their design and methodological nuances. Collaboration with experts in nutrition and dietetics is essential for the planning phase; however, even with expert input, not all challenges can be overcome. Researchers undertaking future dietary trials must be transparent in reporting these challenges and approaches for overcoming them. This review aims to provide guiding principles and recommendations for addressing these challenges to facilitate the conduct and reporting of high-quality trials that inform and improve clinical practice.
ESSAY AS A PRODUCT OF THE EDUCATIONAL ACTIVITY OF A FUTURE SPECIALIST IN INFORMATION SECURITY
Authors:   South Ural State University, Astakhova L.V.
Published: March 2022

The research provides evidence for the importance of essay as a productive form of educational activity of university students. The contradictions between the demand of society for specialists with a high intrinsic motivation, sufficient skills to create new educational and information products, the ability to form professional expert opinions and the unrealized potential of universities in the formation of these skills were revealed. The specific features of the professional activity of future specialists in information security are substantiated that require the use of the essay genre in the educational process. The purpose of the article is to define the features and pedagogical conditions for the use of essays in educational activities of future specialists in information security. The informational approach and the theory of self-determination to productive learning activities were used. The specific factors of choosing an essay as a product of the educational activity of students based on the characteristics of their future professional activities were determined. The author offers pedagogical conditions for the inclusion of essays in the educational process as a result of systematic and internally motivated educational and informational activities for the development of professional disciplines on information security. The implementation of these conditions in the educational process at the university proves the practical significance of the study.
UNIVERSITY STUDENTS’ TRAINING IN CROSS-CULTURAL SCIENTIFIC COMMUNICATION VIA VIRTUAL INTERACTION
Authors:   South Ural State University, Elsakova R.Z.
Published: March 2022

The topicality of university students’ training in cross-cultural scientific communication can be seen at the state, theoretical and practical levels. The significance of its solution aims at finding the best ways to organize the educational process at the university. The specifics of communication between the representatives of the scientific community is the existence of direct and indirect (virtual) ways of interaction. Accordingly, when organizing the process of university students’ training in cross-cultural scientific communication, it is necessary to build the process both with direct and indirect interaction. The paper describesthe algorithm of university students’ training in cross-cultural scientific communication via virtual interaction, which includes the stages (preparatory, acquisition and expertize), the content of the online course (“Academic English for Masters”) created in the information-educational system of the university, and e-learning tools (simulator tools, control tools, information and reference tools, demonstration tools) used for this type of training. The principle of implementing the preparation of university students for crosscultural scientific communication via virtual interaction is the adaptability of building the educational process in the e-learning system, which consists in adaptive presentation of the material, adaptive navigation, and adaptive testing. The solution of this problem has been carried out using theoretical and empirical methods: documentation analysis, literature analysis, ascertaining experiment, comparison, synthesis, generalization, induction, deduction.
TRAINING MODEL OF TECHNICAL TRANSLATORS UNDER THE DEVELOPMENT OF EMERGING ENGINEERING EDUCATION
Authors:   Harbin Polytechnic University, Hong Xu , Huishu Yang ,   Harbin Polytechnic University
Published: March 2022

Emerging engineering education is a driving force for the continued development of China's era of technology and intelligence. Training of technical translators requires many issues to be solved. The issues are: the shortage of highly qualified teaching staff; integration of the model of training in the specialty of the Russian language; the gap between the training of specialists and social needs. To introduce the results of the engineering education development, teachers should reconsider the concept of teaching. New scientific and technical knowledge should be introduced into education programmes to train interdisciplinary translators, and cooperation between universities and enterprises to apply theoretical knowledge in practice should be enhanced. The teachers of the Russian language must apply this knowledge in practical training, make adjustments to the teaching model, conduct scientific and technical training, change the model of training specialists in the Russian language and take an active position in relation to economic globalization and scientific and technological progress. Teachers should use the achievements of emerging engineering education as a reference point for the training of technical translators of the Russian language in an interdisciplinary manner.
Detection and Propagation of Metadata Updates within CIS environment
Authors: Samoilenko Sergey
Published: March 2022

In order to adapt to the demands of the modern hypercompetitive environment many organizations integrate their information sources and form alliances. Cooperative Information System (CIS) provides a flexible form of integration that requires, due to absence of the common integrated schema, heightened attention to the data quality management. Commonly, the associated with the CIS’ data metadata assumed to be static and of a high quality. However, in a modern fast changing competitive environment this assumption must be relaxed, and the issue of metadata quality management should be addressed explicitly. While research concerning data quality in CIS environment is abundant, no work, to our knowledge, has addressed the issues of how changes to metadata could be detected and propagated within the CIS environment. In this paper we attempt to address this research problem by proposing, first, a metadata update management methodology and, second, a conceptual design of the technical solution allowing for the detection and propagation of metadata updates within CIS environment
Más allá de las encuestas. Cultura política de las mujeres en el Estado de Puebla: comportamiento electoral
Authors: González Vidaña Braulio
Published: March 2022

ReseñaMÁS ALLÁ DE LAS ENCUESTAS. CULTURA POLÍTICA DE LAS MUJERES EN EL ESTADO DE PUEBLA: COMPORTAMIENTO ELECTORALAngélica Mendieta RamírezPlaza y Valdés, México 2011
PENINGKATAN KOMPETENSI PEMBUATAN â€œCINTUKâ€ (CINCAU KATUK) SEBAGAI UPAYA DIVERSIFIKASI PENGOLAHAN MAKANAN TAMBAHAN BAGI IBU HAMIL DAN MENYUSUI
Authors: Savitri Erna Noor , Dewi Novi Ratna , Amalia Andin Vita
Published: March 2022

Para ibu menyusui cenderung tidak percaya diri dalam menyusui bayinya dengan alasan khawatir ASI hanya diproduksi dalam jumlah yang sedikit dan tidak dapat memenuhi kebutuhan gizi bayi. ASI ibu sering dirasa tidak cukup untuk bayi sehingga khawatir bayi kelaparan dan akhirnya memilih susu tambahan lain dalam hal ini adalah susu formula. Tujuan dan target luaran IbM adalah; (1) Memberikan kesadaran masyarakat Kelurahan Kalisegoro dalam memberikan ASI eksklusif pada bayi; (2) Memberikan pelatihan cara mengolah daun katuk menjadi â€œcintukâ€ (cincau daun katuk) sekaligus sebagai upaya diversifikasi makanan tambahan ibu menyusui dan konservasi keanekaragaman hayati. Metode yang digunakan dalam kegiatan pengabdian adalah menggunakan pendekatan penyuluhan dan workshop tentang manfaat daun katuk serta aplikasi langsung pembuatan cincau daun katuk pada warga Kalisegoro. Kegiatan pengabdian dilaksanakan selama 3 bulan dengan rencana kegiatan dan prosedur kerja sebagai berikut; (1) penyuluhan mengenai manfaat dan diversifikasi olahan daun katuk; (2) pelatihan tentang pembuatan cincau yang menggunakan bahan dasar daun katuk; (3) aplikasi produksi pembuatan cincau daun katuk pada kelompok warga desa Kalisegoro. Program ini telah diilaksanakan dengan kegiatan: (1) Penyuluhan mengenai pentingnya ASI dan manfaat mengonsumsi Cintuk yang dilaksanakan pada tanggal 16 Juli 2016; (2) pelatihan tentang pembuatan Cincau daun katuk â€œCintukâ€ yang dilaksanakan pada tanggal 17 Juli 2016, dari pelatihan tersebut telah dipraktekkan dan telah menghasilkan cintuk yang siap dikonsumsi.
Pelatihan Penyusunan Proposal dan Laporan Penelitian Tindakan Kelas Bagi Guru Sosiologi SMA/MA di Kab. Lombok Timur
Authors: Fajar Fajar , Kismini Elly , Iswari Rini , Astuti Tri Marhaeni Pudji , Brata Nugroho Trisnu , Prasetyo Kuncoro Bayu , Muzakki Muzakki , Tohri Ahmad
Published: March 2022

Terbitnya Permennegpan RB Nomer 16 Tahun 2019 menegaskan posisi guru untuk dapat memenuhi tuntutan yang melekat pada profesinya. Mau tidak mau guru harus banyak melakukan aktivitas dan membuat karya yang dapat menunjang Pengembangan Keprofesian Berkelanjutan. Namun pada praktiknya banyak guru yang telah lama tidak mengajukan kenaikan pangkat. Salah satu alasannya keengganan guru membuat Penelitian Tindakan Kelas (PTK) karena kurangnya pengetahuan dan keterampilan para guru dalam membuat proposal dan laporan PTK. Permasalahan tersebut kemudian diselesaikan melalui kegiatan pelatihan penyusunan proposal dan laporan PTK. Metode pelaksanaan yang dipakai untuk memecahkan masalah tersebut adalah sosialisasi, pelatihan, dan workshop. Pelatihan ini ditujukan kepada guru sosiologi SMA/MA Kabupaten Lombok Timur. Hasil kegiatan menunjukkan bahwa ada beberapa guru PNS peserta kegiatan ini merupakan guru senior yang mengaku kesulitan dan kurang paham dalam penyusunan proposal PTK. Ketidak pahaman inilah yang menyebabkan mereka tidak pernah membuat PTK dan mengajukan kenaikan pangkat. Melalui kegiatan ini guru-guru dilatih menyusun outline (sistematika) proposal PTK untuk memudahkan proses penulisan substansi proposal. Setiap bagian dari outline proposal PTK dijelaskan satu persatu dari bagaimana membuat judul, menguraikan latar belakang, menentukan rumusan masalah, menyusun kajian pustaka dan landasan teori, serta menentukan langkah-langkah tindakan dalam setiap siklus. Pada kegiatan ini guru turut serta membuat outline proposal PTK dengan dimbimbing langsung oleh pemateri. Hingga kegiatan ini berakhir peserta kegiatan masih terlihat antusias mengikuti kegiatan ini. Pelatihan penyusunan proposal dan laporan PTK terlaksana berkat dukungan Prodi Pendidikan Sosiologi FISE Univarsitas Hamzanwadi terutama dalam fasilitasi perijinan, undangan peserta sarana prasarana serta tempat kegiatan.
Penerapan Digital Marketing dan Pelatihan Pijat pada KUBEPENDA
Authors: Maysaroh C Nurlaila , Dewi C Ari Dewi C , Nurhidayah Siti Nurhidayah
Published: March 2022

KUBEPENDA (Kelompok Usaha Bersama Penyandang Disabilitas) merupakan kumpulan penyandang disabilitas yang ingin maju dan mandiri, permasalahan pada KUBEPENDA yang pengabdi amati adalah rendahnya penjualan produk KUBEPENDA dan tidak efesiensinnya metode penjualan. Selain dari itu bagi penyandang tunanetra anggota KUBEPENDA memilik profesi terapis pijat, akan tetapi kemampuan yang dimiliki dari belajar sendiri (autodidak), sehingga tidak memiliki keterampilan secara spesifik. Tujuan dari pengabdian ini adalah pelatihan dan penerapan digital marketing dan pijat bagi penyandang tunanetra. Metode yang digunakan dengan cara diskusi, pelatihan, dan penerapan digital marketing dan pijat khususnya totok syaraf. Hasil yang didapatkan dari pengabdian ini adalah meningkatnya omset, terciptanya aktivitas operasional yang efektif, efisien dan ekonomis, serta meningkatnya keterampilan penyandang tunantera dalam bidang totok syaraf.
Understanding shoulder pseudoparalysis. Part II: Treatment
Authors: Coward Jonathon C , Bauer Stefan , Babic Stephanie M , Coron Charline , Okamoto Taro , Blakeney William G
Published: March 2022

Decision-making for the treatment of pseudoparalytic shoulders is complex and a high level of experience in shoulder surgery and outcome evaluation is required.

Management and results depend on clinical findings, tear and tissue quality, patient and surgeon criteria. Clinical findings determine the exact definition and direction of pseudoparesis and pseudoparalysis.

Tear pattern and tissue quality determine if the rotator cuff is repairable or irreparable. Age and general health are important patient factors.

Non-operative treatment is the first option for patients with a higher risk profile for reconstruction or arthroplasty, but delineation of its value requires better evidence.

Tendon transfers are used for irreparable loss of the horizontal force couple balance (rotation). Options include latissimus dorsi, pectoralis minor and major for loss of active internal rotation, and latissimus dorsi ± teres major and lower trapezius for loss of active external rotation (AER).

Partial cuff repair with or without superior capsular reconstruction using allograft or biceps tendon is an option for loss of active forward elevation.

Treatment for the combined loss of elevation and external rotation patients is still not clear. Options include lateralised reverse shoulder arthroplasty (RSA) alone or combined RSA with a tendon transfer.

RSA with loss of AER can be revised by adding a tendon transfer.
Synthesis and Characterization of Binary Reduced Graphene Oxide/Metal Oxide Nanocomposites
Authors: Avar Baris , Panigrahi Mrutyunjay
Published: March 2022

Graphene/metal oxide composites have generated interest for a variety of applications, such as energy storage, catalysts, and electronics, etc. However, one of the primary technical barriers to real applications has been the lack of practical and environmentally benign synthesis methods for producing homogenous graphene/metal oxide nanocomposites on a wide scale. Therefore, a simple, efficient, and environmentally friendly approach to the synthesis of graphene (reduced graphene oxide: rGO)/metal oxide (MO) nanocomposites was developed with the chemical reaction of graphene oxide (GO) and various metal oxide powders under mild temperature conditions. In this study, the GO was synthesized from graphite powder using modified Hummer’s technique initially. Later, using ascorbic acid (AA) as a reducing agent, various binary nanocomposites such as rGO/ZnO, rGO/CuO, rGO/TiO2, and rGO/Ag2O were synthesized by in situ approach. The structural and surface properties of the synthesized binary nanocomposites were extensively examined by X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Energy dispersive spectroscopy (EDX), and Raman spectroscopy techniques. The XRD analysis of the synthesized binary rGO/MO nanocomposites confirmed the nanocrystalline nature. However, the FESEM and EDX analysis substantiated the MO nanoparticles were uniformly distributed onto the rGO layers anchoring of MO onto rGO particles and interacted with the rGO residual functional groups. Raman spectroscopy analysis indicated the increased number of defects because of the interfacial interaction between rGO and MO and the formation of binary rGO/MO nanocomposites.
A comparative density functional theory study of BMSF-BENZ chemisorption on Zn12O12, Al12P12 nanocages
Authors: Al-Sawaff Zaid , Dalgic Serap Senturk , Najim Zaheda A. , Othman Shatha S. , Kandemirli Fatma
Published: March 2022

In this paper, density functional theory (DFT) study was applied to the absorption of BMSF-BENZ ((4-bromo-7-methoxy-1-(2-methoxyethyl)-5-{[3 (methylsulfonyl)phenyl]methyl)}-2-[4-(propane-2)) yl)phenyl]-1H-1,3-benzothiazole) used for the treatment of Osteoporosis, on the surfaces of two types of nanocages Zn12O12 and Al12P12. The results showed that the interaction of BMSF-BENZ with the nanocages was highly exothermic, indicating the high chemical adsorption of the new complexes. The adsorption energies of the ZnO nanocage were higher than those of AlP for all the active atoms investigated on the drug compound (Br, N8, N9, N58, O35, O42, and S).Topology analyses such as QTAIM and NCI/RDG indicate that the interactions between the BMSF-BENZ drug and the surface of the ZnO nanocage are more substantial than that of the AlP nanocage. The obtained results of charge, the total density of states (TDOS), and boundary molecular orbital analysis confirm a characteristic orbital hybridization upon adsorption of BMSF-BENZ, indicating the potential application of AlP as a biochemical adsorbent for BMSF-BENZ. However, ZnO nanocage is a candidate for drug delivery applications.
Physicochemical and Electrocatalytic Performance of Chromium doped Iron Pyrite Thin Films
Authors: Prabukanthan P. , Sreedhar M. , Harichandran G. , Tatarchuk T. , Dinakaran K. , Uthayakumar S. , Younis A.
Published: March 2022

Chromium (Cr3+) doped iron pyrite (FeS2) thin films were deposited on ITO substrate by a facile electrochemical deposition process. The effect of chromium content on structural, optical, electrical, morphological, and electrocatalytic behavior of the pyrite thin films were examined. X - ray diffraction studies confirmed the formation of cubic crystal structure of deposited thin films. Atomic force microscopy results indicate that Cr3+ doping has strong influence on crystallinity, surface roughness and grain size of as-deposited thin films. Further, bandgap reduction was found in Cr3+ doped FeS2 thin films. The interfacial charge resistance of fabricated thin films was investigated by electrochemical impedance spectroscopy and 3 mole % Cr3+ doped FeS2 thin films showed excellent conductivity with a low charge transfer resistance of 49 Ω.  Further, the electrocatalytic performance of the prepared pyrite thin films was investigated. Cr doped thin films were found to exhibit better performance. Anti-structural modeling was opted to investigate the characteristics of defects in fabricated thin films and it was established that Cr3+substitutionmay form cation (Fe2+) vacancies which could be responsible for enhanced photochemical and electrochemical activities in Cr-doped FeS2 thin films.
Identification of Faulty Operation in Photovoltaic Panels
Authors: Haba Cristian-Gyozo
Published: March 2022

Increasing the efficiency of photovoltaic panels (PV) is one of the important goals of researchers worldwide in the field of renewable resources. The important results obtained in the case of finding new materials for the manufacturing of the panels to obtain the highest possible conversion efficiency must be doubled by research for developing methods for efficient real-time monitoring of PV operation in order to rapidly or in advance identify possible failures. This paper looks for some types of failures and how they can be identified as quickly as possible from the information coming from different sources, the most important being the PV monitored parameters, the PV control system parameters, and from different cloud services. One way to identify different types of failures is to use machine learning (ML) methods. In applying these methods, an important thing is the availability of a great number of good training data sets. In order to obtain such data sets, this paper aims to create a model of PV using Matlab, which is fed with both real data and data synthesized using fault models. A number of four simulation cases were considered which take into account the normal operation of the photovoltaic panels, their malfunction due to a failure (two different types of failures were considered), and the malfunction of the panels due to the appearance of the two types of failures simultaneously, using input data that was partially measured and partially generated in Matlab. The outputs of these model simulations will be used for training the ML model.
The evolution and global impact of Covid-19 and Omicron: the way forward?
Authors: Tulp Orien L , Einstein George P
Published: March 2022

Coronaviruses are a family of pathogenic viruses that including MERS, SARS, and SARS-Cov-2, and are known to cause respiratory and other illnesses in man and animals. The SARS-CoV-2 virus, responsible for the COVID-19 virus is a monopleiotropic clade of the coronavirus family first reported in Wuhan, China in December 2019 where it was found to cause a previously unreported form of viral pneumonia. The virus readily spreads by airborne microdroplet infection, and within a month of its report to the WHO in December 2019 was found in the USA and other countries and was declared a pandemic by the WHO within the first few months of its discovery and emergence. Numerous mutations of the virus with variations in infectivity and pathogenicity began to appear within the first year, including the current Delta and Omicron, both of which are more contagious than their SARS-CoV-2 progenitor strain. Omicron, while approximately five-fold more transmissible than Delta, may infect both vaccinated and unvaccinated people, and is now responsible for the majority of currently infected people but to date has resulted in only mild and non-life-threatening outcomes. Due to the greater infectivity and the mild illness attributed to the Omicron, it may be an important development in terminating the continued spread of the pandemic.
Wave-particle interaction during electron beam-modulated injection into the ionospheric plasma. Theory and experiment
Authors:   Pushkov Institute of Terrestrial Magnetism, Ionosphere and Propagation of Radio Waves of the Russian AS, Troitsk, Russia, Baranets N.V. , Ruzhin Yu.Ya. ,   Pushkov Institute of Terrestrial Magnetism, Ionosphere and Propagation of Radio Waves of the Russian AS, Troitsk, Russia, Vojta J. ,   Institute of Atmospheric Physics of the Academy of Sciences of Czech Republic, Prague, Czech Republic
Published: March 2022

We present the results of the active space experiment with charged particle beam's injection (electrons and xenon ions) carried out onboard Intercosmos-25 station and daughter Magion-3 subsatellite. The ones are obtained under conditions when the particle beams were injected in opposite directions relative to the magnetic field B0 in such a way that the electron injection was directed towards the Earth. Mechanisms of beam-plasma instabilities relative to the excitation of electrostatic and electromagnetic waves are considered during the electron beam injection (~10 keV, 0.1 A) from the Intercosmos-25 station. Development of transverse instability on the first cyclotron resonance leads to the excitation of whistler mode waves backward-propagating relative to the injected electrons (from the Earth). The investigation object was the beam-excited differential fluxes of ionospheric electrons in a wide energetic range of 27 eV — 412 keV registered by the charged particle spectrometers onboard the Magion-3 subsatellite. Thereby, the interaction of whistler waves with ionospheric electron fluxes is stimulated by the energy transfer mechanisms such as 'particle-wave-particle'. Numerical results of beam-plasma instabilities are compared also with thermal plasma parameters registered at different space points on the station and subsatellite. Excitation of longitudinal and transverse beam-plasma instabilities will inevitably lead to their competition, which will affect the results of the experiment. The data of stimulated fluxes of ionospheric electrons allow us to investigate the various effects of the wave-particle interaction, taking into account the influence of the growth rate of longitudinal instability on the excitation angle of whistlers and their structure. This approach is based on the results of laboratory experiments to determine the pattern of excited whistlers for an electric dipole antenna and the analogy of the beam-plasma channel with the radiating system. The results of the active space experiment confirm the dependence of the growth rate of whistler mode waves on the development of longitudinal beam instability.
Deep learning for spacecraft guidance, navigation, and control
Authors:   Institute of Technical Mechanics of the National Academy of Science of Ukraine and the State Space Agency of Ukraine, Dnipropetrovsk, Ukraine, Khoroshylov S.V. , Redka M.O. ,   Institute of Technical Mechanics of the National Academy of Science of Ukraine and the State Space Agency of Ukraine, Dnipropetrovsk, Ukraine
Published: March 2022

The advances in deep learning have revolutionized the field of artificial intelligence, demonstrating the ability to create autonomous systems with a high level of understanding of the environments where they operate. These advances, as well as new tasks and requirements in space exploration, have led to an increased interest in these deep learning methods among space scientists and practitioners. The goal of this review article is to analyze the latest advances in deep learning for navigation, guidance, and control problems in space. The problems of controlling the attitude and relative motion of spacecraft are considered for both traditional and new missions, such as orbital service. The results obtained using these methods for landing and hovering operations considering missions to the Moon, Mars, and asteroids are also analyzed. Both supervised and reinforcement learning are used to solve such problems based on various architectures of artificial neural networks, including convolutional and recurrent ones. The possibility of using deep learning together with methods of control theory is analyzed to solve the considered problems more efficiently. The difficulties that limit the application of the reviewed methods for space applications are highlighted. The necessary research directions for solving these problems are indicated.
The method for RT-32 radio telescope error matrix construction in automatic mode. Automatic assesment of tracking errors
Authors:   National Center of Space Facilities Control and Test, Kyiv, Ukraine, Vlasenko V.P. , Mamarev V.M. ,   National Center of Space Facilities Control and Test, Kyiv, Ukraine, Ozhynsky V.V. ,   National Center of Space Facilities Control and Test, Kyiv, Ukraine, Ulyanov O.M. ,   Institute of Radio Astronomy of the National Academy of Science of Ukraine, Kharkiv, Ukraine, Zakharenko V.V. ,   Institute of Radio Astronomy of the National Academy of Science of Ukraine, Kharkiv, Ukraine, Palamar M.I. ,   Ternopil Ivan Pului National Technical University, Ternopil, Ukraine, Chaikovskyi A.V. ,   Ternopil Ivan Pului National Technical University, Ternopil, Ukraine, Fryz S.P. ,   Zhytomyr Military institute named by Serhii Korolov, Zhytomyr, Ukraine
Published: March 2022

On March 15th, 2021, scientists of the National Space Facilities Control and Tests Center and the Radio Astronomical Institute of the National Academy of Sciences of Ukraine carried out preliminary observations with the Ukrainian new generation radio telescope RT-32 (Zolochiv, Lviv region). The extragalactic radiation of radio galaxy 3C84 (Perseus-A), masers from the galactic molecular cloud W3, radio emission of methanol maser from the galactic radio source G188.946 + 0.886 were observed and successfully recorded. Observations were performed as training in the framework of preparation for the launch of a joint Ukrainian-Latvian radio astronomy project lzp-2020/2-0121. The results of the observations confirmed the world level of RT-32 radio telescope characteristics, the efficiency of the primary error matrix and revealed several shortcomings in the functioning of the tracking system. It was found that the primary tracking error matrix has insufficient discreteness and contains errors of the first and second types. In the article, we present a method of automatic construction of the radio telescope error matrix according to the data of a radiometric receiver and receivers-recorders. The method of construction provides automatic processing of the obtained radiometric data. The results of verification of the developed method using the reference radio sources of different types and the elements of tracking errors’ matrix by the elevation and azimuth obtained when using it are presented. The results obtained with the proposed method were included in the radio telescope control system and allowed us to increase the aiming accuracy of the RT-32 radio telescope.
Influence of SLM-process parameters on the formation of the boundaries of parts of heat-resistant nickel alloy Inconel 718
Authors:   Oles Honchar Dnipro National University, Dnipro, Ukraine, Adzhamskiy S.V. ,   LLC «Additive Laser Technology of Ukraine», Dnipro, Ukraine, Kononenko G.А. ,   Z.I. Nekrasov Iron and Steel Institute of the National Academy of Sciences of Ukraine, Dnipro, Ukraine; LLC «Additive Laser Technology of Ukraine», Dnipro, Ukraine, Podolskyi R.V. ,   Z.I. Nekrasov Iron and Steel Institute of the National Academy of Sciences of Ukraine, Dnipro, Ukraine; National Metallurgical Academy of Ukraine, Dnipro, Ukraine
Published: March 2022

We consider the improvement is considered of the modes of selective laser melting technology based on the design model to reduce the level of residual stresses and prevent deviations in the geometry of the part. Simulation results are presented on a universal voxel structure and a simplified object to predict metal behavior depending on the specific energy density in the region of the boundaries of a metal part made of Inconel 718. An experiment was carried out to study the influence of different strategies and process modes on the curvature of parts as a result of the effect of residual stresses in order to minimize them. Printing was carried out on a 3-D printer "Alfa-150" (LLC "ALT Ukraine") at constant power (P, W) and distance between tracks (d, mm) in each zone (up-skin, down-skin, in - skin) with a change in the speed (V, mm / s) of the laser beam movement, as well as a different pattern of sample growth by 3-D printing with 67 degrees rotation of each new layer relative to the previous one. To identify defects and deviations from the original model to the solid (sample), metallographic analysis was performed using optical microscopy (Carl Zeiss AXIOVERT 200M). It was found that the simulation of printing processes, performed on the Magics platform by breaking the model into a voxel structure, allows an analytical assessment of stresses and strains. Analysis of the appearance of the prototypes showed that the best down-skin indicators are formed at a power of 80 W and a specific energy density (40 ... 38 J / mm3). By using the 67 degrees staggered printing strategy at the optimum specific energy density, it is possible to minimize the residual internal stresses leading to distortion of the product. In the future, the results can be supplemented by studies of the effect of residual stresses of compressive forces when exposed to a laser beam at constant applied power. Using a computational model that allows calculating the residual stresses during the deposition of the next layer, depending on the speed of the laser, the power and the distance between the applied tracks, it is possible to obtain high-precision parts with specified properties. The adaptation of the model, which allows us to obtain a quantitative estimate of the residual thermal stresses depending on the speed of movement and the laser power for the Inconel 718 heat-resistant alloy, has been carried out. Optimal modes have been determined to minimize these stresses and reduce the curvature of the part.
EFFICIENT DESIGN OF THE FUEL CASE OF THE LV “VEGA” ORBITAL STAGE USING TOPOLOGY OPTIMIZATION
Authors: Shynkaruk Vladyslav Ivanovich , Lipovskyi Volodymyr Ivanovich
Published: March 2022

The development of new aircraft manufacturing technologies makes it possible to create improved designs. In the article, we have studied the design element of the fourth stage fuel compartment of the launch vehicle (LV) «Vega» — AVUM (Attitude Vernier Upper Module). This element is called a case. Its function is to connect four fuel tanks into a single fuel compartment. A new version of the design is proposed based on the analysis of load conditions of the previous research object. While designing the aircrafts there are opposite criteria which should be met. On the one hand, the design must be strong, rigid, stable and at the same time have the least weight. Additive technologies have fewer restrictions on the complexity of designed geometry than traditional ones. Modern methods of topological optimization make it possible to determine the direction of force flows in a structure. Based on this data, the optimal design is determined to take into account the requirements of working capacity and minimum weight. The combination of new technologies with topological optimization methods allows to design parts more efficiently. Currently, metal 3D printing technology is developing in the direction of reducing restrictions on produced parts dimensions. It is possible to manufacture fuel tanks up to 2400 mm in diameter using additive manufacturing technique. Therefore, the proposed design of the AVUM fuel compartment case does not change main tactical and technical characteristics of the stage. The ultimate load cases were taken according to requirements for the LV «Vega». The proposed design option is based on the previously developed solution of replacing the flat plate with a spherical bottom with holes for the tanks. The application of topological optimization is considered in this paper to create a design option with minimum mass. Topological optimization was carried out for all load cases and, based on the obtained results, a superposition of the retrieved solutions was performed. A rational design option was (modelled/generated) based on the analysis of the obtained results with consideration of the technological restrictions. The fulfilment of the strength conditions for the designed geometry was approved with verification static analysis. As a result of the topology optimization, the mass of the final design is 30% lower than for the original one.