bluuebunny/crossref_metadata_2025 huggingface dataset:
Intelligent Road Illumination Network using IoT
Authors: Patel Apurva , Patel Anuj , Uplap Dhruva
Published: October 2022

Abstract: In day-to-day life electricity has been an area of concern worldwide. There are not many sources for nonrenewable sources and most of the power generation stations, they are based on fuels that are conventional. Street lights are one of the consumable sources of electricity that are essential parts of the day-to-day life. The conventional street lighting systems require manual operation and also consume a large amount of power as they are in powered on condition from evening to early morning. The conventional manual operated street lighting systems consume a large amount of power, need manual operators and heavy cost on installation which has been a great disadvantage and an area of major concern. The costs of energy can be reduced immediately to 35% through intelligent on/off mechanism and targeted organized way of power consumption. The aim of this project is conservation of energy by reducing electricity wastage and to minimize the manpower. The idea utilizes Light Emitting Diodes (LED) that doesn’t take huge amount of power and being directional light sources, it can radiate light in specific direction thereby improving the efficiency of the streetlamps. Using LDR with LED lights the intensity can be controlled. IR sensors utilized on one roadside send signals for the LEDs to get glowing for the next specific section of the road after sensing the density and movement of pedestrians.
Evaluation of plasma glucose control in diabetic patients on hemodialysis a single center study
Authors: Razooqi Saif Hassan , Al_Hashimi Rafah Mohammed Saeed , Alsodani Mohammed Hannon
Published: October 2022

Objectives: The aim of study is to evaluate plasma glucose control in diabetic patient on hemodialysis by measure plasma glycated albumin and HbA1c and correlate them with parameters like serum electrolytes blood urea, serum creatinine, hemoglobin, serum albumin, total serum bilirubin, serum uric acid, parathyroid hormone, serum ferritin; to evaluate the effects of these parameters on the level of diabetic control.

Methods: This is a cross sectional study which included type 2 diabetic patients on hemodialysis these patients are currently undergoing hemodialysis and are on hemodialysis for more than three months. Total 50 type 2 diabetic patients on hemodialysis; between ages of 47-62 years of either gender were selected randomly and comparison done between the effect of different factors on HbA1c and glycated albumin.

Results: There were 50 patients enrolled in this study with a mean age of 54.5 ± 4.7 (range: 47 – 62) years. Males represented 58% (29 patients) while female represent 42% (21 patients) of the studied group with male to female ratio of 1.38 to one. The duration of diabetes (DM) ranged 4 – 20 years and two thirds of the cases had duration of 15 years or less. Regarding the treatment of DM, 35 patients (70%) were on soluble insulin while 15 patients neither receive insulin nor oral antidiabetic agent and their treatment was off. poor glycemic control was significantly associated with younger age, patients aged < 50 years were more frequent among the poor glycemic. good glycemic control had significantly lower HbA1C% level.

Conclusion: Most of our diabetic patient on HD has controlled diabetes reflected by the level of HbA1c and GA. Serum ferritin levels is positively correlate with HbA1c levels in diabetic patient on hemodialysis which suggests that serum ferritin levels can be a marker of glycemic control in type 2 DM.
Olfactory training outcomes in post COVID 19 olfactory dysfunction
Authors: Bahjat Mohammed Abdulwahab , Fadhil Raad Darweesh , Khalaf Usama Zidan
Published: October 2022

Objectives: The aim of study is to evaluate the olfaction recovery of patients who performed OT (olfactory training) in a post-COVID-19 PPVOD.

Methods: Study included 50 patients with a sudden loss of smell and a confirmed COVID-19 diagnosis from January 2020 to January 2021 in Kirkuk General Hospital. These participants were submitted to The Sniffin’ Sticks test in order to identify those with persistent olfactory dysfunction who were treated either by olfactory training combined with a 10-day course of oral corticosteroids, or by olfactory training alone.

Results: Cross sectional comparative study for 50 patients have history of COVID 19 infection, mean age of patients [47 ± 10] years. [56%] of patients at age group ≥ 45 years, [44%] of patients are females and [56%] are males. The mean of TDI score increase after OT than before OT with significant difference.

Conclusion: Olfactory function appeared to improve only in peripheral aspects of post COVID-19 PPVOD after OT. patients < 45 years have high mean of TDI score than patients ≥ 45 years old.
Hygienic assessment of a crew’s working life in Arctic conditions and seafarers’ health regulations: prospective study
Authors: Razletova A. B. , Nikitina V. N. , Lyashk G. G. , Kalinina N. I. , Dubrovskaya E. N. , Kotenko P. K.
Published: October 2022

OBJECTIVE: To study peculiarities of crew’s working conditions while navigating the Northern Sea Route and regulations in the field of labor protection for developing proposals to reduce seafarers’ health risks.

MATERIALS AND METHODS: There was the use of data from domestic and foreign studies by habitability factors and natural environment of the Arctic zone, health status of different occupational groups of seafarers. Foreign regulations in the field of labor protection and domestic regulatory legal acts in the field of navigation safety and reduction of seafarers’ health risks were examined.

RESULTS: The analysis of regulatory documents of international legislation showed that national documents should take security concerns into providing sanitary-hygienic and epidemiological situation on vessels. Current sanitary regulations (СП 2.5.3650-20) establish minimum crew health requirements to all types of sea transport on a limited number of production factors.

DISCUSSION: In navigation on the Northern Sea Route a vessel crew is under additional load, caused by difficult navigation conditions and natural factors. However, current domestic regulations do not take into consideration peculiarities of the crew working life in the Arctic conditions and increased seafarers’ health risk.
Overview On Substance Induced Mood Disorders
Authors: Mohammad Alsudairy Najlaa , Abdullah Almuqrin Ibrahim , Ali Shukr Abdulrahman , Manajaa Alotaibi Manal , Ahmed Hassan Alghamdi Asma , Ibarahim Abbas Wajdi , Hussam Abdullah A Joraid , Abdullah Tban M Alanazi , Mohammedhussain Abdullah , Mohammed A Abu Murad Dimah , Salem Mohammed S Al Sharyah , Abdullah Aldalaan Turki
Published: October 2022

Despite the fact that both illegal drugs and iatrogenic pharmaceuticals are taken with the intention of improving mood, a sizeable percentage of patients actually have paradoxical affective problems as a result of taking those prescriptions. Some people have manic or depressive episodes instead of the banal bliss that comes with drinking or the "hangover" the next day. Substanceinduced mood disorders are those that only manifest in conjunction with substance use. Bipolar disorder and its related disorders, as well as depressive disorders, are examples of affective disorders that can develop in the context of substance use. Previously, these diseases may be found in the DSM-nosological IV's category of substance-induced mood disorders. However, "substanceinduced" is now a qualifier for mood disorders in the most recent DSM. In the general population, substance use disorders (SUDs) and depression and bipolar illness usually co-occur. The aim of this review is discussing substance-induced depressive disorder, substance-induced bipolar disorder, and related diseases. It will also go into further detail on how to tell them apart from mood disorders that co-occur with SUDs. Although it is no longer a separate category in the DSM-V, the term "substance-induced mood disorders" will be used to refer to both substance-induced depression and bipolar disorders for the purposes of this review. And the main objective is to collect research and review articles using trusted data base.
Axioms of Folklore Experience in the Works of Russian Thinkers of the First Third of the Twentieth Century (V.V. Rozanov, P.A. Florensky, E.N. Trubetskoy, B.P. Vysheslavtsev, I.A. Ilyin, A.A. Vanovsky)
Authors:   A.M. Gorky Institute of World Literature of the Russian Academy of Sciences, Nalepin Alexey L.
Published: October 2022

The monograph, which is based on unknown and little-known sources, for the first time in Russia and in world science gives a complete and objective description of the folklore component of the philosophical heritage of the outstanding Russian thinkers of the first third of the twentieth century: V.V. Rozanov, E.N. Trubetskoy, B.P. Vysheslavtsev, I.A. Ilyin, P.A. Florensky, A.A. Vanovsky. Russian folklore culture is studied in the monograph as a living tradition, which largely determines the ways of development of Russian civilization and the meanings of the national mentality. Folklore and, of course, philological folklore studies, as well as philosophical folklore studies, play an important role in this, because all these disciplines study the ideological dominants and concepts of folk poetic creativity. The research is based on a specific complex analysis of the philosophical heritage in the works of such major thinkers of the first third of the twentieth century as V.V. Rozanov, P.A. Florensky, E.N. Trubetskoy, B.P. Vysheslavtsev, I.A. Ilyin, A.A. Vanovsky. The aim of the research was to find and define a harmonious synthesis of philosophy and folklore, which will undoubtedly enrich both philosophical thought and, in particular, the philosophical theory of knowledge, as well as domestic and world folklore studies.
Gestão de campos de férias para crianças
Authors: Sousa Marisa , Gonçalves Celina , Biscaia Rui , Carvalho Maria José
Published: October 2022

O estudo dos campos de férias para crianças aumentou nos últimos anos. Todavia, a utilização de diferentes termos e a dispersão da informação na literatura acerca da gestão destes eventos dificulta o esclarecimento das diretrizes de pesquisa, por um lado, e dificulta a melhoria das práticas de gestão, por outro. Este estudo visa sintetizar o conhecimento existente na gestão destes eventos, identificar inconsistências e lacunas na literatura, e definir direções para futuras pesquisas e práticas. Foi realizada uma revisão estruturada de estudos publicados entre 1950-2021. Metade dos estudos utilizou o termo “campos de verão”; mas também foram utilizados outros dez termos diferentes. Foram identificadas cinco áreas de gestão: segurança, comportamento do consumidor, recursos humanos, organização de eventos e pesquisa em campos de férias. Foram ainda identificadas lacunas na literatura. Estes resultados são importantes para definir novos caminhos de pesquisa e melhorar a gestão destes eventos.
Redes Sociales y el caso de las ligas deportivas durante el COVID-19
Authors: Solanellas Donato Francesc , Muñoz Joshua , Romero Jara Edgar
Published: October 2022

Este estudio contribuye a la literatura existente sobre comunicación deportiva proporcionando evidencia sobre cómo las organizaciones deportivas se comunicaron en las redes sociales durante la pandemia del COVID-19. Para tal fin, se realizó un análisis de contenido de las publicaciones de las redes sociales Facebook, Twitter e Instagram de cinco grandes competiciones: Liga ENDESA ACB, TURKISH AIRLINES Euroleague, NBA, La Liga y la UEFA Champions League. En total se analizaron 2.425 publicaciones recopiladas por un período de dos semanas (1 al 15 de abril de 2020). Los resultados mostraron que, a pesar de las diferencias encontradas desde una perspectiva descriptiva, tras el análisis estadístico, las organizaciones deportivas analizadas optaron por una estrategia de gestión similar de sus redes sociales. Estos hallazgos pueden ayudar a comprender cómo las organizaciones deportivas lidiaron con el COVID-19, y ayudarlas a enfrentar crisis futuras con un mayor conocimiento sobre sus acciones pasadas.
Stability of residual hearing and cochlear implant function following multiple scuba dives: case report
Authors:   Division of Otology, Neurotology and Skull Base Surgery, Department of Otolaryngology-Head  and Neck Surgery and Neuroscience Institute, Virginia Mason Medical Center, Seattle, Washington U.S., Zeitler Daniel M. , Almosnino Galit ,   Neuroscience Institute, Virginia Mason Medical Center, Seattle, Washington U.S., Holm James R. ,   Center for Hyperbaric Medicine, Department of Medicine, Virginia Mason Medical Center, Seattle,  Washington U.S.
Published: October 2022

Objectives: There are limited data regarding the safety of cochlear implants during exposure to pressure changes associated with scuba and hyperbaric oxygen therapy. There are no data regarding the effects of barometric pressure changes on preserved low-frequency hearing after cochlear implantation. This case report evaluates the effect of barometric pressure changes on preserved low-frequency hearing after cochlear implantation. Patient: This is a case report of a patient who underwent successful cochlear implantation with postoperative preservation of residual low-frequency hearing. Interventions: 20 scuba dives up to depths of 92 feet (3.8 atmospheres absolute). Main outcome measures: Preservation of hearing and maintained integrity of the implant. Results: Audiometric testing both before and after scuba shows no change in hearing thresholds. The internal receiver-stimulator of the cochlear implant was unaffected by prolonged and repeated pressures up to approximately 3.8 atmospheres absolute. The patient had no adverse middle ear effects during or after the dives, and no evidence of inner ear barotrauma or decompression sickness as a result of the elevated pressures. Conclusions: This is the first report of preserved hearing after cochlear implantation being maintained following scuba diving, and corroborates previous literature showing that exposure to increased pressures with a cochlear implant in situ is safe without adverse effects on the implant hardware or software. Scuba diving appears safe not only with cochlear implants but also in patients with residual hearing.
Effects of sleep and fatigue on teams in a submarine environment
Authors:   Naval Submarine Medical Research Laboratory, Groton, Connecticut, Chabal Sarah , Welles Rebecca ,   Naval Submarine Medical Research Laboratory, Groton, Connecticut,   Leidos, Inc., Reston, Virginia, Haran F. Jay ,   Naval Submarine Medical Research Laboratory, Groton, Connecticut, Markwald Rachel ,   Naval Health Research Center, San Diego, California
Published: October 2022

Successful submarine operations rely on the performance of tactical teams who must work under conditions of physiological and cognitive fatigue. Sleep loss and circadian disruption contribute to fatigue in this setting and, although the effects of this fatigue have been studied extensively in individuals, little is understood about how fatigue impacts team performance – especially in a submarine environment. The present review provides an overview of the fatigue on submarine teams and is divided into four main sections: A discussion of factors that should be considered in team fatigue research. An outline of how sleep and circadian rhythms of submariners are impacted by submarine-specific factors. A discussion of the known effects of fatigue from sleep loss and circadian disruption on individual performance. A consideration of how this fatigue impacts team performance. As the submarine force has recognized the need to protect submariner sleep and improve team dynamics, it is vital that future research accounts for the interplay between these two factors.
The Gradient Perfusion Model Part 1: Why and at what sites decompression sickness can occur
Authors:   Long Beach Memorial Medical Center, Hyperbaric Medical Program, Long Beach, California U.S., Strauss Michael B. , Lu Lientra Q ,   VA Tibor Rubin Medical Center at Long Beach, Long Beach, California U.S., Miller Stuart S. ,   Long Beach Memorial Medical Center, Hyperbaric Medical Program, Long Beach, California U.S.
Published: October 2022

Introduction: Decompression sickness (DCS) is manifested by the quantity and location of bubbles in body tissues after reduction in ambient pressures. Models have been formulated to explain why bubbles form, but none provide satisfactory explanations as to why the findings of DCS occur as they do. This first of a three-part series explains why and at what sites DCS occurs. Materials and Methods: Over a 50-year span and 500 cases of DCS we have managed, it has become apparent that almost all “unexplained DC"S" (i.e., cases with no obvious explanation as to how/why they occurred) have physiological explanations. The vagaries of the physiology of tissue perfusion and the physics of gradients as a cause of autochthonous bubble formation were analyzed. Findings: Perfusion is highly variable, with so-called “fast” tissues (i.e., tissues with a rapid rate of saturation) requiring a constant blood supply, “intermediate” tissues requiring a blood supply proportional to needs, and “slow” tissues having minimal perfusion requirements. The 5-liter blood volume in a vascular system with greater than a 20-liter capacity requires careful regulation. Disruptions in the regulation and/or overwhelming gradients explain why DCS occurs. Conclusions: Our Gradient-Perfusion Model provides an explanation as to why disordering events account for almost all cases of unexplained DCS. We propose that this latter term be discarded and “disordering events” be used for DCS cases that have no obvious explanations.
Risk perception in small-scale fishers and hyperbaric personnel: A risk assessment of hookah diving
Authors:   Universidad Marista de Mérida, Periférico Norte Tablaje Catastral 13941, Carretera Mérida - Progreso, 97300 Mérida, Yucatán, Mexico, Huchim-Lara Oswaldo , Seijo Juan Carlos
Published: October 2022

Hookah diving is a fishing method used in many small-scale fisheries in the Gulf of Mexico and the Caribbean Sea, as well as in many coastal fisheries around the world. Many high-value species like sea cucumber and spiny lobster, among others, are harvested via hookah diving. However, the fishing method presents a risk for both decompression illness and carbon monoxide poisoning, both causes of disabilities and death among small-scale fishers, and with significant negative impacts on the social and economic status of households and coastal communities. Currently, there is a misunderstanding among fishers concerning diving risks. Using a mixed-method analysis, this study reports the risk perceptions of small-scale fishers and hyperbaric personnel about hookah diving, and the actual diving accidents which occur in the spiny lobster and sea cucumber fisheries in the Yucatán northeastern ports. The study highlights the need for appropriate fishing technologies and increased awareness among fishers about the consequences of hookah diving. Fishery managers and health services can make priority decisions based on the information generated.
Board structure and earning management: A comparative study between the pre-pandemic and during the COVID-19 pandemic periods
Authors: Ulfah Yana , Ambarita Nita Priska , Hidayani Hidayani , Yudaruddin Rizky , Lesmana Dadang
Published: October 2022

The agent is granted decision-making authority over the company’s operations to achieve the principal’s objectives (Jensen & Meckling, 1976). The economic crisis during the pandemic compelled managers to exert additional effort, such as earnings management. They aimed to achieve the desired profit and serve the principal’s best interests. Board structure elements such as board size, independence, women membership, and chief executive officer (CEO) duality correlate with board governance. The elements improve the quality of financial reports and reduce earnings management practices. Therefore, this study aimed to investigate the board structure’s influence on the earnings management of Indonesian firms before and during the pandemic. Covering a sample of 539 firms recorded on the Indonesia Stock Exchange (IDX) in Indonesia from 2019Q1 to 2020Q4, panel data regression is utilized to test the hypothesis. This study finds that only board size significantly impacted earnings management. The board size is less effective in overcoming earnings management in the normal period. However, the COVID-19 pandemic encouraged the board of directors to increase management monitoring. This means more board directors can reduce earning management effectively during the pandemic. It highlighted the significance of many board directors in reducing earnings management during the pandemic.
Signal demodulator based on in-phase and quadrature interference-robust feature
Authors: Deng Wen , CAI XIN , Wang Xiang , Huang Zhitao
Published: October 2022

In this letter, the issue of mitigating strong co-channel interference
(CCI) in communication systems is addressed. Unlike conventional
model-based methods, a novel data-driven scheme is proposed. A recurrent
neural network (RNN) is trained to directly demodulate the desired
signal under strong CCI. Instead of inputting the original received
signal, in-phase and quadrature interference-robust features (IRF) are
extracted through preprocess. The RNN is then trained offline to
implement sequence labelling, with the IRF sequences and known code
sequences of the desired signal as inputs and ground-truth labels.
Meanwhile, a guard zone is introduced when loading the IRF sequences to
enable better contextual information exploitation by the RNN
demodulator. Online tests validated the low bit error rate (BER) of the
RNN demodulator, under strong CCI. Moreover, the proposed scheme
outperformed existing model-based and data-driven interference
mitigation schemes in terms of the BER, especially in low
signal-to-interference ratio region. Inspiringly, the proposed
data-driven scheme generalized well to varied unseen test conditions.
Detecting N-ethyl-N-nitrosourea-induced mutation in the tissues of mice using whole-genome HiFi Sequencing
Authors: McKinzie Page , Miranda Jaime , Dertinger Stephen , Bemis Jeffrey , Revollo Javier , Dobrovolsky Vasily
Published: October 2022

Direct sequencing can be used for characterizing mutagenicity in complex
biological models, e.g., in various tissues of mammalian species. We
employed whole-genome High-Fidelity Sequencing (HiFi Sequencing) for
detecting mutations induced in male CD-1 mice by N-ethyl-N-nitrosourea
(ENU). Mice were treated by gavage with a single 40 mg/kg dose of ENU at
12 weeks of age; negative control mice were untreated. Peripheral blood
and solid tissues (liver, spleen, and kidney) were harvested 4 weeks
post-exposure; the erythrocyte Pig-a assay was used to measure mutant
frequencies in peripheral blood, while mutations were evaluated in the
solid tissues by HiFi Sequencing. The frequency of Pig-a phenotypically
mutant total red blood cells and reticulocytes in ENU-treated mice
increased 7- and 30-fold, while the frequency of mutations in the
genomic DNA of solid tissues increased up to 7-fold, with the greatest
increase observed in the spleen and the smallest increase in the liver.
The most common mutations detected by HiFi Sequencing in ENU-treated
mice were T>A transitions and T>C
transversions. The data suggest that HiFi Sequencing complements the
Pig-a reporter gene mutation assay, detecting mutagenicity in tissues
where performing the Pig-a assay is impossible and providing information
on the spectra of mutations which potentially may be useful for
characterizing the genotoxicity of novel compounds.
Epidemiology of monoclonal gammopathy in Morocco- A hospital-based study Running Head: Monoclonal gammopathy
Authors: Ouzzif Zhor , DOGHMI KAMAL , messaoudi nezha , Bouhsain Sanae , IDRISSI SAMIRA EL MACHTANI , Biaz Asmâa , Rachid Achraf , Dami Abdellah , BEZZA Ahmed , MAATAOUI AISSAM EL
Published: October 2022

Introduction: Monoclonal gammopathies are a group of disorders
associated with monoclonal proliferation of plasma cells that produces a
monoclonal protein. To describe the epidemiological and immunochemical
characteristics of monoclonal gammopathies diagnosed during a
nineteen-year period in a Moroccan teaching hospital was the main
objective of this study. Methods: This study was performed from January
2000 to August 2019. It was a retrospective study that included of 545
Moroccan patients with monoclonal gammopathy. Results: The patients who
participated in the study, 374 (68.6%) were male and 171(31.4%) were
female, with a mean ±SD age of 62.24±13.14 years. The most frequent
reasons for admission were bone pain (41,60%), renal failure (19.08%),
alteration of the general condition (12.21%) and anemia (10.69). Plasma
cell proliferative disorders in our study were as follow, multiple
myeloma (MM) (45.65%), Monoclonal gammopathies of undetermined
significance (MGUS) (39.05%), Waldenstrom’s macroglobulinemia(5.58%),
Lymphoma (2.27%+1.2%), Chronic Lymphocytic Leukemia (2.48%), Plasma
cell leukemia (1.86%), Plasmacytoma (0.62%), POEMS syndrome (0.41%),
and Amyloidosis (0.84%). The most frequent isotypes in MM were the IgGκ
(62) 36.5%, IgGλ(52)30.6%, IgAκ(27)15.9% and the IgAλ (19)11.2%. It
is also worthy of note, that Free light chain MM represents 20% of all
cases of MM. Conclusions: This is the largest Moroccan cohort, it
included 545 patients. The results of this study point to the need for
an early diagnosis of monoclonal gammopathies in the Moroccan population
Odrastanje iz antropoloske perspektive - primeri iz Sofije i Beograda - uvod u temat
Authors: Djordjevic-Crnobrnja Jadranka
Published: October 2022

nema
Effectiveness of Different Polishing Kits for Chairside CAD/CAM Provisional Restorative Materials
Authors: Jurado CA , Barkmeier WW , Alshabib A , Alresayes SS , Fu C-C , Teixeira EC , Baruth AG , Tsujimoto A
Published: October 2022

Objective

To investigate the efficacy of three specially designed polishing kits for provisional restorations made from three chairside computer-aided design and computer-aided manufacturing (CAD/CAM) provisional resin blocks.

Method

Ninety-six chairside CAD/CAM provisional restorations were milled out of three chairside CAD/CAM provisional resin blocks: (1) ArtBloc Temp (Merz Dental); (2) Telio CAD (Ivoclar Vivadent); and (3) Vita CAD-Temp (VITA Zahnfabrik). The provisional restorations for each material were allocated into the following groups: (1) milled restorations (no polish); (2) polished with CADMaster CAD/CAM Adjustment & Polishing Kit (CM, Shofu); (3) polished with KUT Ultimate Bisacryl (Temporaries) Polishing Kit (KU, Dental Savings Club); and (4) polished with K0330 PMMA Adjusting, Finishing & Polishing (KP, Brasseler USA). Optical profilometry and atomic force microscopy (AFM) were used to assess the surface roughness (Ra) of each provisional restoration at the microscale and nanoscale, respectively, and obtain topographical images. In addition, the milled and polished restorations were visually evaluated by 16 dentists.

Results

There was a strong positive correlation with Ra values between optical profilometry and AFM. Only KP significantly improved the surface roughness of CAD/CAM provisional restorations compared to the milled equivalent, regardless of material type or measurement modality (ie, lateral length scale). Although surface topography imaging with AFM revealed some shallow scratches, even for KP polished specimens, all KP polished restorations were categorized as clinically acceptable for provisional restorations in visual inspections from dentists.

Conclusion

Specially designed polishing kits for provisional restorations did not all improve the surface roughness of chairside CAD/CAM provisional restorations, regardless of the measurement method. KP was more consistently effective in polishing milled chairside CAD/CAM provisional restorations than CM and KU.
In Vitro Wear of Glass-Ionomer Containing Restorative Materials
Authors: Valeri AS , Sulaiman TA , Wright JT , Donovan TE
Published: October 2022

Statement of Problem

Advertisements of glass-ionomer-containing restorative materials recommend suitability as load-bearing permanent or semi-permanent restorations. Historically, unacceptably high wear rates limit clinical indications of glass-ionomer-containing restorations in this regard.

Objective

To compare the in vitro wear of contemporary glass-ionomer-containing dental materials commercially advertised for use in permanent dentition as load-bearing restorations in a chewing simulator. Resin composite was tested as a control.

Methods and Materials

A resin-modified glass ionomer (Ionolux, VOCO gmbH), a high viscosity glass-ionomer hybrid system (Equia Forte HT with Equia Coat, GC America), and a bioactive ionic resin with reactive glass filler (Activa Bioactive Restorative, Pulpdent) were evaluated. Filtek Supreme Ultra (3M ESPE) is a visible light-activated resin composite that served as a control. Standardized flat disk-shaped specimens (n=12/group) were submitted to 500,000 cycles with continuous thermal cycling against steatite antagonists. Volumetric wear was measured at 1000, 10,000, 200,000, and 500,000 cycles.

Results

There was a statistically significant difference in mean volumetric wear for Activa Bioactive Restorative (p=0.0081, 95% CI: 0.3973, 0.4982) and Equia Forte HT (p<0.001, 95% CI: 1.2495, 1.8493), but no statistically significant difference in mean volumetric wear for Ionolux (p=0.6653) compared to control. Activa Bioactive Restorative wore approximately 60% less than, and Equia Forte HT twice more than Filtek Supreme Ultra on average, respectively.

Conclusions

Compared to a resin composite, contemporary glass-ionomer-containing restorative materials advertised for use as load-bearing restorations display measurably variable in vitro wear rates.
Bir Bilim Merkezindeki Sergi ile Nanoteknoloji Eğitimine İlk Adım
Authors: Bilici Esra , Yazıcıgil Zafer , Akaygün Sevil
Published: October 2022

İnformal öğrenme ortamlarının en yaygın örneklerinden biri bilim merkezleridir. Belirli öğrenme hedefleri göz önünde bulundurularak tasarlanan bilim merkezi sergileri, öğrencilerin fen öğrenimlerini kolaylaştıran ögelerden biridir. Bu çalışmada, bir bilim merkezindeki nanoteknoloji konulu sergi düzeneği kullanılarak uygulanan etkinlikle bu teknolojiye ait kavramların anlaşılmasına etkisi araştırılmıştır. Araştırma ortaokul 5, 6 ve 7. sınıf öğrencilerinden oluşan 109 katılımcı ile gerçekleştirilmiştir. Katılımcıları aktif kılan öğretim tekniklerinden tahmin-gözlem-açıklama (TGA) tekniği kullanılmıştır. Nitel araştırma yöntemlerinden durum çalışmasının kullanıldığı çalışmada veriler tematik analiz kullanılarak kodlanmış ve anlamlı kategoriler oluşturulmuştur. Çalışmadan elde edilen bulgulara göre, TGA tekniği ile sergi düzeneklerinin kullanıldığı nanoteknoloji etkinliğini uygulayan öğrencilerde gözlemlenebilir düzeyde kavramsallaştırmadan tanecik düzeyinde kavramsallaştırmaya doğru bir geçiş olduğu gözlenmiştir. Bu nedenle, nanoteknolojinin daha küçük yaşlarda bilinmesi ve anlaşılması için bilim merkezi sergi düzeneklerinin kullanıldığı etkinliklerin yapılması önerilebilir.
Determination of jet treatment modes for curvilineare surfaces of products
Authors:   Lviv Polytechnic National University, Stotsko Zinoviy , Stefanovych Tetyana
Published: October 2022

Aim. Developing an approach for determining the modes of jet treatment for the curved surfaces of products to ensure uniform processing, which is achieved by maintaining a constant distance from the nozzle end to the surface and maintaining the perpendicularity of the nozzle axis to the curved surface at the point of processing during movement and changing the nozzle inclination. Method. The basic principles of analytical geometry on the plane are used to describe the processed curved surface. Kinematic equations of a material point motion as the basic principles of theoretical mechanics were used to research the motion of the processed curved surface. Graphical dependences and analysis of the obtained results were carried out by using the mathematical editor. Results. The result is the complex of the mathematical models, the use of which in control systems of technological equipment will ensure uniform processing by adjusting the linear velocity of the product surface and the angular velocity of the jet nozzle, and thus ensure the required accuracy and quality of products. Scientific novelty. The approach for modeling jet treatment of products with curved surfaces is improved, namely the method of determining processing modes under conditions of constant distance from the nozzle end to the surface and perpendicularity of the nozzle axis to the tangent at the processing point is proposed. Analytically, expressions for mathematical description of curved surfaces depending on their shape and character of motion are obtained. Practical significance. The proposed approach is recommended to be used in technological processes of jet treating for the products of complex configuration, when designing units of technological equipment or devices designed to ensure the movement of the product or the tool. Mathematical models can be the basis for ensuring the quality of curved surfaces of products obtained by jet treating.
Simulation of bulk material descent from centrifugal cone disc dispenser
Authors:   Lviv Polytechnic National University, Dmytriv Vasyl , Dmytriv Ihor ,   Lviv Polytechnic National University, Gorodnyak Roman , Sahan Oleh
Published: October 2022

Aim. Development of an analytical model and study of particle movement on the surface of a conical disk rotary dispenser-mixer of bulk material. Method. The particle, which is placed on the conical disk, is subjected to gravity directed vertically downwards, the pressure force of the vertical component of the bulk component. The force of the normal reaction of the surface of the conical disk is directed perpendicular to the cone generating line of the dispenser disk at a given point where the material particle is located. Cartesian coordinate system. The x-axis is directed along the generator line from the vertex, the y-axis is perpendicular to the x-axis and z-axis and is directed towards the rotation of the disk, and the z-axis is directed vertically upwards. The centrifugal force vector is directed along the radius. The Coriolis force is directed tangentially perpendicular to the x-axis in the opposite direction to the direction of rotation of the disk. The friction force, as the resulting force vector, is directed in the opposite direction from the direction of movement of the particle on the disk due to the centrifugal force. The force of friction of the particle on the surface of the disk decomposes into normal and radial projections. Considering an elementary particle as a material point, the differential equation of motion in vector form. Projecting the vector equality on the X and Y axis, we obtain a system of differential equations of particle motion. The numerical Runge-Kutta solution using the rkfixed function in the MathCad environment was used to solve the differential equations. Results. The speed and trajectory of the particles of bulk material depends on the angle of the conical disk and the frequency of its rotation. As the angle of the cone generating line increases, the duration of movement of the particle on the surface of the cone and the distance of movement decreases. The smoothness of movement is determined by the angle between the velocity vectors vx and vy. Smooth change of the direction of the vector of the resulting speed makes it possible to increase the accuracy of dosing the material and increases the discreteness. Scientific novelty. For the first time, a system of differential equations of motion of a material particle on a conical dispenser of centrifugal type was obtained, which takes into account the distribution of particle friction forces on the disk surface on normal and radial projections and their solution by the Runge-Kutta numerical method. Practical value. The application of the obtained system of differential equations and the algorithm of their solution makes it possible to model the design and technological parameters of the disk conical centrifugal dispenser of bulk materials.
Formation of high-efficient discrete three-mass inter-resonance oscillation system of the vibratory machine with the electromagnetic drive
Authors:   Lviv Polytechnic National University, Lanets Oleksiy , Maistruk Pavlo ,   Lviv Polytechnic National University, Borovets Volodymyr ,   Lviv Polytechnic National University, Maіstruk Volodymyr ,   Lviv Polytechnic National University, Kachmar Roman ,   Lviv Polytechnic National University
Published: October 2022

Goal. It consists in substantiating the inertial-rigid and force parameters of a high-efficient discrete three- mass inter-resonance oscillation system of a vibratory machine with an electromagnetic drive and in forming its mathematical model taking into account the drive. Significance. Despite the widespread use of one- and two-mass vibratory machines in the industry, their three-mass analogs in the inter-resonance oscillation zone have significant dynamic potential. New approaches to the calculation and design of three-mass inter-resonance vibratory machines would facilitate their mass introduction in enterprises of various industries as technological equipment. Method. A mathematical model of a three-mass inter-resonance oscillatory system of a vibrating machine with an electromagnetic drive in the form of a system of linear differential equations is considered. Based on it, dependencies are formed to determine the required inertial-rigid and force parameters of a highly efficient vibratory machine. Based on the already known power parameters of the system is a technique for establishing the necessary parameters for the design of the vibratory machine electromagnetic drive. The above parameters are embedded in the mathematical model of the vibratory machine. The time dependences of the motion of oscillating masses are investigated taking into account the processes occurring in the electromagnetic vibrator. Results. Inertial-rigid, force parameters of the oscillatory system are substantiated. A mathematical model of a three-mass inter-resonance oscillatory system is formed, which takes into account electromagnetic processes in the drive. Scientific novelty. A mathematical model of a three-mass inter-resonance oscillatory system of a vibratory machine is formed, taking into account the processes occurring in the electromagnetic drive, where the force action of the electromagnet is formed through the current in the coil of the vibrating exciter. Practical significance. The proposed method of calculations of three-mass inter- resonance vibratory machines with electromagnetic drive can be used in the design of high-efficiency vibratory process equipment.
Rancang Bangun Alat Pemantau Arus, Tegangan dan Daya Berbasis Blynk (Studi di Gedung Dharma Penelitian Universitas Bangka Belitung)
Authors: Sunanda Wahri , Bahri Syaiful , Jumnahdi Muhammad
Published: October 2022

Sistem pengukuran dan pemantauan energi listrik yang dilakukan secara langsung memiliki berbagai kekurangan, diantaranya tidak dapat diakses secara real time. Oleh karenanya, pada penelitian ini  dirancang alat ukur sistem pemantauan pada panel yang diimplementasikan di Gedung Dharma Penelitian Universitas Bangka Belitung menggunakan aplikasi Blynk pada smartphone berbasis mikrokontroler. Dalam penelitian ini juga akan dibandingkan hasil pengukuran dengan alat ukur clamp meter. Dari hasil penelitian, selisih nilai yang terbaca oleh sensor PZEM-004T terhadap alat ukur clamp meter yakni 1,37 V untuk fasa R, 0,8 V untuk fasa S dan 1,4 V untuk fasa T. Untuk selisih nilai arus yakni 0,03 A untuk fasa R, 0,04 A untuk fasa S dan 0,03 A untuk fasa T. Sedangkan untuk daya 7,88 W untuk fasa R, 0,90 W untuk fasa S dan 0,98 W untuk fasa T
Metode Latihan Drill Dapat Menjadi Solusi Untuk Meningkatkan Teknik Dasar Passing Sepakbola?
Authors: Subarja Roja , Aminudin Rizki , Nasution Nana Suryana
Published: October 2022

Masih rendahnya kemampuan siswa dalam melakukan passing dalam olahraga sepakbola menjadi permasalahan utama dalam penelitian ini. Tujuan penelitian ini adalah untuk menguji pengaruh metode latihan drill sebagai solusi untuk meningkatkan teknik dasar passing. Metode penelitian yang digunakan berupa eksperimental. Populasi berasal dari SMP Negeri 3 Telagasari dan sampel yang dipilih adalah siswa dari kegiatan esktrakulikuler sepakbola yang keseluruhanya berjumlah 13 orang. Instrumen untuk mengukur kemampuan passing siswa menggunakan Soccer Wall Volley Test. Analisis data menggunakan IBM SPSS. Hasil penelitian ini menunjukan bahwa metode latihan drill secara signifikan dapat meningkatkan kemampuan passing siswa dalam olahraga sepakbola. Dengan demikian penelitian ini terbukti secara positif bahwa metode latihan drill menjadi solusi yang tepat dan efektif untuk siswa dalam mengembangkan kemampuan passing dalam sepakbola menjadi lebih terampil.
A Review of Rituals and Local Wisdom of Indigenous Peoples in Indonesia
Authors: Chakim Sulkhan
Published: October 2022

This study aims to map publication trends about the rituals, and local wisdom of indigenous peoples in Indonesia published at the international level, can provide benefits for researchers about traditions and local wisdom, is 1) mapping specifications of research developments, 2) revealing research collaborations and publications at the global level. The method used in this study is a bibliometric method that can provide guidelines for citation analysis, co-citation, coupling bibliometric, and shared word analysis. This bibliometric method has completed the meta-analysis and review of the constructed literature to explore and evaluate the scientific publications that researchers have carried out. The results showed that investigations related to indigenous peoples' rituals and local wisdom were demonstrated by 48 events, six items and 12 links, 3 clusters, including cluster 1 consisting of human, Indonesian and local wisdom. Cluster 2 consists of ecotourism and sustainability. Cluster 3 includes a questionnaire survey, widely published by the database scopus.com from 2012 to 2022. Mapping done through bibliometrics shows that research trends related to human keyword terms have been widely developed and published over the past ten years.
EFL Teachers' Reflective Teaching Practices amid the Covid-19 Pandemic
Authors: DAĞ AKBAŞ Raşide
Published: October 2022

Purpose: The current survey portrays English as a Foreign Language (EFL) teachers’ familiarity with the concept of reflective teaching and the extentthat they carry out reflective teaching practices especially during their first experience with online teaching amid the Covid-19 Pandemic.

Design/Methodology/Approach:In the current descriptive study, a varied sample of Turkish EFL teachers (N=117) filled out the online survey at the end of the first academic semester with an emergency online education period induced by the Covid-19 pandemic.

Findings: The study indicated that nearly forty per cent of the participants were unfamiliar with the concept of reflective teaching. While metacognitive and affective practices were more commonly performed by the participants, the critical, practical and cognitive practices were rather less preferred. The participants hardly ever think of writing articles regarding their experiences, asking their colleagues to observe their teaching and also, relatively less contemplate on the socio-political sides of their teaching and their influences.

Highlights: The notion of reflection and the reflective teaching strategies should be revisited, and accordingly, the scales or inventories should be reformulated by taking the premises of online education into consideration.
EFL Students’ Online Course Satisfaction and Attitudes Towards E-Learning in Post-Pandemic Hybrid Education
Authors: ERDEL Didem
Published: October 2022

Purpose: This study seeks to identify the EFL students’ satisfaction with the online courses they took within the scope of hybrid education in the post-pandemic period and their attitudes towards e-learning, and to determine whether there is a relationship between these two variables.

Design/Methodology/Approach: Students studying in Iğdır University English Language and Literature Undergraduate Program in the spring semester of the 2021-2022 academic year constitute the population of this research. Since there are online courses at all levels, including the preparatory program in the department, all of the department students were included in the research and in order to collect the research data, the Online Course Satisfaction Scale and the Attitudes towards E-learning Scale were administered at four levels (Preparation, 1st, 2nd, and 3. Grades) of the program. The data obtained were transferred to the SPSS program and descriptive and inferential analyzes were carried out.

Findings: The research findings indicated that the students were moderately satisfied with their experiences in online courses and they had mildly positive attitudes towards e-learning. The students’ satisfaction was not affected by their gender, nor their perceived L2 proficiency, but by the year of study, juniors and preparatory year students having the highest satisfaction means. As regards the learner attitudes, male students had significantly more positive attitudes towards e-learning than females and the sophomores and juniors reported more positive attitudes than students at other levels. A statistically significant relationship between online course satisfaction and attitudes towards e-learning was identified as a result of the analyses.

Highlights: The moderate satisfaction and attitude levels found as a result of the study suggest that the challenges the students encountered during the emergency remote teaching might be continuing in hybrid education practices. The implementation of more solid, realistic and systematic program evaluation is suggested in order to mitigate the factors adversely affecting EFL students’ satisfaction and attitudes towards e-learning.
Řízení a sběr dat z hardwarového simulačního modelu pomocí RaspberryPi a MQTT protokolu
Authors: Hucl Matouš , Malaga Miroslav , Ulrych Zdeněk
Published: October 2022

Příspěvek se zabývá možnostmi využití jednodeskového počítače RPi při řízení a sběru dat ze zkušebního modelu Fishertechnik. Fishertechnik je polytechnická stavebnice, skládající se z mechanických součástí (převodovky, ozubená kola apod.) a z výkonových součástí (elektromotory, ventily, světelné moduly atd.). Z této stavebnice byl vytvořen zkušební model, který simuluje výrobní linku. Výrobní linka reprezentuje pracoviště rentgenu, selekci zmetků a balení materiálu. Stavebnice Fishertechnik nabízí i řídící jednotku Fishertechnik Controller TXT4.0 a vývojové grafické prostředí ROBO Pro Coding. Tento článek se zabývá možnostmi využití tohoto hardwaru a softwaru. Zároveň demonstruje využití přímého napojení mechanických komponent stavebnice Fishertechnik na GPIO piny na RPi. Pro možnost síťového propojení a výměny dat mezi zařízeními byl použit protokol MQTT. V tomto případě slouží jako snadný způsob pro vzdálené získávání dat, ovládání Raspberry Pi a komunikace se softwarem ROBO Pro Coding od společnosti Fishertechnik. Díky tomu je možné vytvořit síť z více zařízení, řídit je a získávat z nich data s pomocí jednoho centrálního PC a demonstrovat tak základní principy průmyslu 4.0.
Ergonomická racionalizace výrobního pracoviště
Authors: Kačerová Ilona , Anapreyenka Yauheniya
Published: October 2022

Článek popisuje ergonomickou racionalizaci výrobního pracoviště v automotive podniku. V rámci ergonomického hodnocení bylo pracoviště vymodelováno ve 3D prostředí, byla provedena analýza RULA a byly zhodnoceny pracovní polohy dle české legislativy. Na základě těchto výsledků byla navržena nápravná opatření.