bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of Extruder Plasticizing Systems on the Selected Properties of PLA/Graphite Composite
Authors: Kaczor Daniel , Bajer Krzysztof , Domek Grzegorz , Madajski Piotr , Raszkowska-Kaczor Aneta , Szroeder Paweł 
Published: October 2022

Abstract
Twin-screw extrusion is a crucial method for the direct inserting of carbon micro- and nanomaterials into a polymer matrix using a dry procedure. The study aimed to determine the influence of the parameters of the twin-screw extruder plasticizing system on the dispersion homogeneity and distribution of graphite filler in the polylactide polymer matrix and overall quality of the composite. As a filler, a graphite micropowder with a 5 μm lateral size of platelets was used at concentration of 1 wt.%. Three configurations of screws with different mixing intensity and various types segments were considered in the extrusion experiments. Morphology and chemical structure of the obtained composites were examined using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy – attenuated total reflectance (FTIR-ATR) and Raman spectroscopy. Differential scanning calorimetry (DSC) and melting flow rate measurements (MFR) were used to asses thermal and rheological properties of the composites. Samples of the polylactide/graphite composites were also subjected to mechanical tests. The results show that the selection of the mechanical parameters of twin-screw extruder plasticizing system plays a key role in the preparation of the homogeneous PLA/graphite composites. Incorrect selection of the screw geometry results in poor mixing quality and a significant deterioration of the mechanical and thermal properties of the composites. Optimised mixing and extrusion parameters can be the starting point for the design of efficient twin-screw extruder plasticizing system for fabrication of PLA composites with carbon nanotube and graphene fillers.
Current status of predoctoral implant dentistry education – student’s didactic performance and self-assessment: A Systematic Review.
Authors: Nagpal Disha , Flores-Mir Carlos , Nassar Usama , Levin Liran 
Published: October 2022

Abstract
Objectives: To describe the current state of predoctoral dental implant education in terms of educational outcomes and the student’s perception of the associated curriculum. Methods: A database search was conducted using Medline (OVID), EMBASE, ERIC (Education Resources and Information Centre) and Web of Science electronic sources. Two reviewers thoroughly reviewed the papers in accordance with the specific selection criteria after carefully choosing the abstracts that seemed to meet the initial selection criterion for full article retrieval.
Results: 15 articles were included, which were divided into two distinct groups: those that addressed educational outcomes and those that addressed students’ perceptions. Knowledge was assessed by questionnaire surveys, and it was found that most of the students were poorly to moderately well informed. There was a positive increase in student perception after taking the implant courses.
Clinical significance: Although predoctoral education in most dental schools across the world now includes implant dentistry as a core component, the degree of integration varies greatly. To increase the proficiency of predoctoral students around the world in performing implant treatments, it is necessary, according to this systematic review, to create a uniform, well-structured predoctoral implant curriculum and guidelines that include didactic, laboratory, preclinical, and clinical components.
Actualization of Semi-Empirical Equation for UV Index
Authors: Vasi Adriana , Stefu Nicoleta 
Published: October 2022

Abstract
UV radiation at ground level undergoes many variations in the present, due to the ozone column, aerosols, clouds, surface reflectivity, both positive and negative variations, depending on latitude.
This work reports on the updating of the semi-empirical equation proposed by Madronich in 2007 for estimating the UV index, by updating its coefficients, as they encapsulate the state of the atmosphere. Data for Bucharest in 2019-2021 was used for fitting the equation. It was found that the new equation improves the accuracy of the estimation of the UVI in Bucharest five times for 2021 (from nRMSE = 17.3% to nRMSE=3.3%). The validity of the obtained equation was assessed in various locations, showing a great improvement of the estimation accuracy in most of them (in 12 of the 14 chosen locations), regardless of latitude. The equation produces a negative bias for locations having Koppen climate types A and B, a positive bias for the investigated locations situated in climate type D and no definite bias for temperate climates (type C). More studies are needed for drawing a definite conclusion and further improving the applicability of the equation.
Effect of Indian folk-dance therapy on physical performances and quality of life in elderly
Authors: Mishra Siddharth S. , Shukla Shivani 
Published: October 2022

Abstract

Study aim: To study the effect of Indian folk-dance therapy on physical performances and quality of life in elderly.

Material and methods: Forty healthy seniors with age between 60–70 years were randomly allocated into two group; Group A: Indian folk-dance therapy and Group B: Conventional therapy. Both the groups received 60 minutes session, five sessions a week for six weeks.

Results: Inter-group analysis showed significant improvements in Group A in Fullerton advanced balance scale (Z = –2.91, p < 0.01; Montreal cognitive assessment scale (T = 4.77, p < 0.01); single leg stance with eyes open (Z = –2.07, p = 0.03); eyes closed Z = –2.12, p = 0.03), 6 min walk distance (Z = –3.03, p < 0.01) and SF 36 (physical component) (T = 2.38, p = 0.02) and SF 36 (mental component) (T = 2.42, p = 0.02).

Conclusion: Indian folk-dance therapy showed significant improvements in static and dynamic balance, reduced risk of fall, improved cognitive function, improved physical functioning and quality of life than conventional therapy among elderly individuals.
Acute Thrombosis of the Left Main on the Tennis Court in a Young Patient – a Case Report
Authors: Mihăilă Theofana , Roșca Aurelian , Ion Bianca 
Published: October 2022

Abstract
In acute coronary syndromes, timely revascularization of the obstructed artery is crucial. In young patients, acute myocardial infarction can have a very severe evolution and is frequently associated with cardiogenic shock. We present the case of a 36-year-old male patient, smoker with no other apparent risk factors for coronary artery disease, who suffered a cardiac arrest while playing tennis. Emergency coronary angiography revealed acute occlusion of the left anterior descendent artery, which was promptly revascularized. The patient had a good clinical evolution and was discharged after six days. The case underlines the importance of a well-functioning emergency system and STEMI network, able to provide life-saving therapy in a timely manner.
Evaluation of Ribes Rubrum Cultivars in Estonia
Authors: Sepp Toivo , Rätsep Reelika , Libek Asta-Virve , Kikas Ave 
Published: October 2022

Abstract
The evaluation of cultivars of red and white currant (Ribes rubrum L.) was carried out in 2019–2020 at the Polli Horticultural Research Centre of the Estonian University of Life Sciences, South-Estonia. The aim of this study was to estimate traits of red and white currant cultivars of both Estonian and introduced origin. An evaluation plot was established in the autumn of 2016. During two consecutive years (2019–2020), 11 promising cultivars were evaluated for the beginning of flowering and fruit ripening, winter hardiness, resistance to diseases (expressed in scores 1–9), yield per bush, fruit weight, drop of flowers and premature berries, as well as the content of the soluble solids (°Brix), titratable acids, ascorbic acid, total phenols and total anthocyanins. The highest yield was determined in cultivars ‘Bayana’ and ‘Viksnes’, while cvs. ‘Rovada’, ‘Jonkheer van Tets’, ‘Kurvitsa 4’ and ‘Valko’ had larger berries. The highest soluble solid content was found in the berries of red currant ’Krameri punane’ (13.8 °Brix) and white currant ’Bayana’ (12.4 °Brix).
New Strawberry Cultivars for Growing in High Tunnels
Authors: Kalniòa Ieva , Strautiòa Sarmīte , Laugale Valda 
Published: October 2022

Abstract
Strawberry growing in high tunnels is widely used in many countries and the area under cover is increasing. Usually, early ripening cultivars are planted in high tunnels to obtain even earlier yield in the season. In this investigation, several new strawberry cultivars and one hybrid (of Dutch breeding) with medium and late ripening time were evaluated for growing in high tunnels in soil. The trial was established in 4 August 2016 in a FVG type tunnel (60 × 4 × 3.35 m). Frigo plants of the following categories of cultivars and hybrids were used in the investigation: ‘Sonata’ (A) and ‘Sonsation’ (A+) of medium ripening time; ‘Faith’ (A+) and hybrid 09-90s-05 (A) of late ripening time; ‘Malwina’ (A+) and ‘Magnus’ (A) of very late ripening time. The plants were grown on raised beds covered with black plastic mulch in double rows with drip irrigation. Soil type was heavy loam. Plant survival after winter, productivity potential, yield, fruit size, the ratio of high quality to damaged fruits in the crop, fruit sensory characteristics, shelf life and biochemical content after freezing were evaluated. According to three-year evaluation results, ‘Sonsation’ had better fruit quality and resistance to crown diseases than ‘Sonata’ and can be considered appropriate for yield forcing in high tunnels. Hybrid 09-90s-05 and ‘Faith’ are not appropriate for growing in high tunnels in heavy soils. Hybrid 09-90s-05 had good yield, but medium fruit quality and low taste score, and it was susceptible to grey mould. ‘Faith’ had low productivity potential and fruits of medium taste. The very late ripening cultivars ‘Malwina’ and ‘Magnus’ had low productivity in all evaluation years, probably because of too heavy soil.
Results of Propagation of Three Cultivars of Japanese Quince (Chaenomeles Japonica)
Authors: Kaufmane Edīte , Ruisa Silvija , Kārkliņa Katrīna 
Published: October 2022

Abstract
The aim of the trial was to determine the optimal propagation methods for three Japanese quince cultivars. Rooting trials with cultivars ‘Darius’, ‘Rasa’, and ‘Rondo’ were conducted in 2017–2019 in a greenhouse, to investigate the rooting and shoot quality of softwood cuttings, using different treatments. At the beginning of fruit production, growth and amount of the first yield was evaluated depending on propagation method. Softwood cuttings of Japanese quince rooted well (average 82–93%) in a greenhouse with heated substrate and partly automated temperature and moisture control, in spite of different weather conditions during three vegetation periods. The best results for rooting were found for cultivar ‘Rondo’. On average, better results of rooting for all cultivars were obtained when cuttings were soaked in indolylbutiric acid solution and trichodermin was added to the substrate. Significant differences in length and diameter of the bush shoots found between years for both propagation methods and also between years for one type of propagation. On average, microproagated plants had the highest shoot length. After evaluating the first yield, no significant differences were found between cultivars during the first two trial years, but micro-propagated plants had significantly higher yield per bush.
Life Cycle Assessment for Olive Production: A Case Study for the Region of Trás-os-Montes, Portugal
Authors: Brito Thyago , Fernandes-Silva Anabela 
Published: October 2022

Abstract
The olive tree (Olea europaea L.), widely cultivated in the Mediterranean countries for olive oil and table olive production, has an important economic role. In the age of climate change, it is crucial to know the importance of environmental impacts associated to the production system. Thus, the aim of this study was to characterise the environmental impacts of a semi-intensive olive orchard drip irrigated with ground water, located in the Northeast Region of Portugal. Life cycle analysis was conducted according to ISO 14040. We used openLCA software, the Agribalyse V. 3 database, and a cradle-to-gate analysis in the impact assessment (Recipe Midpoint (H) V1.13). In the climate change category, the results indicated that for production of 1 kg olives, a total of 0.249 kg CO2-Eq. were emitted to the atmosphere. Regarding the direct impact of production system, a total of 0.177 kg CO2-Eq. (71.5%) were emitted, followed by indirect impacts associated with raw material of the irrigation system (0.032 kg CO2-Eq. total, 12.7%), and electricity needed to pump ground water (0.012 kg CO2-Eq., 4.8%). In relation to inputs for production, the raw material for urea production contributed 0.013 kg CO2-Eq. (5.0%) of total emissions. To the best of our knowledge, this study was the first carried out in this region, and contributes to a better understanding of environmental impacts that will allow their minimisation and ensure olive orchard sustainability.
Mechanical Thinning Improves the Consistency of Flowering and Yield in Apple Production
Authors: Rubauskis Edgars , Udalovs Dāniels , Borisova Indra 
Published: October 2022

Abstract
Most apple cultivars tend to bear biennially, i.e. produce many fruits in one and few fruits in the next year, or do not have a nature of self-thinning. The effectiveness of chemical thinning depends on conditions, particularly temperature, at the time of application. In some other fruit-growing regions, the mechanical thinning of flowers is adapted to some cultivars by changing the speed of moving and rotation of the mechanisms to conduct partial thinning — removing of flowers. The investigation aimed to evaluate the effectiveness of total flower removal mechanically on one side of the tree row, and on the other side the next year, during the full production period (8th to 12th year after planting) to obtain regular yields. Seven cultivars on dwarfing rootstocks M.9 and B.396 were compared. Apple trees on the dwarfing rootstock B.396 were less affected by biennial yielding. Cultivars had a strong relation to yield — ‘Gita’ (Vf), ‘Konfetnoye’ and ‘Kovalenkovskoye’ had less fluctuation yearly, while ‘White Transparent’, ‘Rubin’ (Kazah.), ‘Antei’, and ‘Ligol’ performed opposite. There was a positive influence observed on reduction of periodicity by mechanical flower thinning, however, there is a discussion on cumulative yield reduction.
Population of Weeds in a Plantation of Red Raspberries (Rubus Idaeus L.)
Authors: Putniece Gundega , Augšpole Ingrīda , Romanova Inta 
Published: October 2022

Abstract
Data from monitoring of weed populations are relevant for successful integrated weed management. The purpose of this experiment was to compare the diversity of weed species in red raspberry plantation rows. The red raspberry plantation was established in August 2019. The plantation is located in the south part of Latvia, Zemgale region (N56°33’29.5302”, E23°46’26.04”). The red raspberry cultivars ‘Daiga’, ‘Shahrazada’, ‘Norna’, and ‘Polana’ were grown in the plantation. The bushes were spaced at 0.6 m in rows and 3 m between rows in a plot with size 0.51 ha. Weed infestation in the red raspberry plantation was determined by using the counting method. The counting of weeds and identification of weed species were done three times during the vegetation at the 16th,22nd, and 30th week of 2021. In total, 34 weed species, including 18 annual and 16 perennial weeds were present in the red raspberry plantation. Poa annua (5–60 plants per m-2) and Elytrigia repens (6–393 plants m−2) were found as dominant weeds. During experiment there were differences in weed populations and density between red raspberry cultivars. The cultivar ‘Norna’ was dominated by perennial weeds, while ‘Polana’ by annual weeds.
ST Segment Elevation
Authors: Lucaci Laurențiu 
Published: October 2022

Abstract
As the earliest indirect sign of an acute coronary occlusion arriving against non-operative collateral heart vessels, the unabating ST segment elevation accounts for the acute coronary syndrome asking for mandatory and immediate reperfusion therapy. The geography of the ST segment elevations usually enables one to identify the culprit artery and to guess its likely occlusion site, as pivotal pieces of the necessary vital risk forecasting, along with somehow expected occurring arrhythmias. Aside from the classical ST segment elevation myocardial infarction (STEMI) pattern, a handful of distinctive non-ST elevation appearances of the acute coronary occlusion also need imperative reperfusion therapy, thus qualifying themselves as STEMI equivalents. The early forthcoming of ST elevation during an acute transmural ischaemic episode, as well as the wide availability of the electrocardiogram, make it an invaluable diagnostic tool. Yet many confounding factors are able to limit the diagnostic sensibility of ST elevation (as for example its customary absence in the conventional leads in some cases of circumflex artery occlusion, or the casual mutual cancellation of the transmural ST vectors from opposite ventricular walls), the accuracy of the electrocardiographic localisation of the occlusion site (due to coronary anatomic variants, concomitant new or old coronary lesions elsewhere, previous coronary artery bypass grafts), as well as its specificity for transmural ischaemia (by virtue of a well-known manifold of non-ischaemic causes). While the STEMI patient must be offered undelayed reperfusion therapy, the non-ischaemic ST elevation one should be kept away from the haemorrhagic risk of a useless invasive procedure.
الحلف الانكلو – سوفيتي وأثره في التدخل الأمريكي في إيران 1941- 1945
Authors: Dahm Adrees Names 
Published: October 2022

كان للاحتلال الانكلو – سوفيتي الدور الاكبر في دخول الولايات المتحدة كمنافس للاتحاد السوفيتي وبريطانيا, فعلى الرغم من ان دخولها كان في البداية هو للدعم اللوجستي إلاَّ أنَّ تطورات الوضع العالمي وطموح الولايات المتحدة في توسيع مصالحها القومية وبسبب الموقع الجغرافي المتميز لإيران جعلها تغير من سياستها تجاه البلد ودول المنطقة. وقد تناول هذا البحث الموضوع بصورة موسعة وبدء بالخلفية التاريخية للتنافس الانكلو - روسي على ايران والمنطقة بصورة عامة واستعرض بصورة موجزة اوجه ذلك التنافس والاتفاقيات التي عقدتها الدولتان وصولا إلى نهاية الحرب العالمية الأولى وما افرزته من نتائج, ولاسيما تغير نظام الحكم في روسيا, فضلاً عن تغير نظام الحكم في ايران وما عقب هذين الحدثين من تغيرات كبيرة في معادلة التنافس الدولي والتي نتج عنها اندلاع الحرب العالمية الثانية.
وفي العنوان التالي تناول البحث احتلال الحلفاء لإيران ونقصد هنا بالاحتلال الانكلو – سوفيتي الذي كان الغرض منه هو منع المانيا من التمدد نحو ايران وبالتالي فتح جبهة ثانية على الاتحاد السوفيتي الذي كان يعاني آنذاك من اختراق جبهته الشرقية من قبل القوات الالمانية. إلاَّ أنَّ البريطانيين لم يتمكنوا من نقل مواد الدعم اللوجستي وغيرها إلى الاتحاد السوفيتي, الأمر الذي قادهم إلى الطلب من الولايات المتحدة القيام بتلك المهمة, وهذا ما تطرقنا اليه من خلال عنوان اخر هو بدايات التدخل الأمريكي في ايران, الذي قاد بعد ذلك إلى بروز حالة من التنافس بين الولايات المتحدة والاتحاد السوفيتي على امتيازات النفط, وقد استمر هذا التنافس حتى نهاية الحرب التي فرضت واقعا اخر على الحلفاء, والذي تمثل بطلب ايران سحب كافة القوات العسكرية من الاراضي الايرانية بحسب ما تم الاتفاق عليه في مؤتمر طهران, إلاَّ أنَّ ذلك الطلب كانت له نتائج سلبية كبيرة على الصعيد الداخلي والخارجي لإيران.
COOPERAÇÃO CHINESA PARA O DESENVOLVIMENTO: O CASO DE MOÇAMBIQUE
Authors: Bambo Tomé Fernando , Schor Adriana 
Published: October 2022

Este artigo discute a cooperação internacional para o desenvolvimento da China em Moçambique nas primeiras duas décadas do século XXI. No contexto desta orientação, a literatura e os dados mostram não só a existência de um número crescente de iniciativas chinesas em Moçambique na seara agrícola, de infraestrutura, saúde e educação, mas a emergência de um novo padrão de cooperação. A cooperação chinesa se consubstancia numa agenda borrada entre projetos de cooperação para o desenvolvimento e investimentos, fato que abre espaço para crítica.
Digital thematic mapping of modern condition of permafrost landscapes in Yakutia
Authors: ФЕДОРОВ А.Н. , ШЕСТАКОВА А.А. , ТОРГОВКИН Я.И. , ВАСИЛЬЕВ Н.Ф. , КОНСТАНТИНОВ П.Я. , САМСОНОВА В.В. , КАЛИНИЧЕВА С.В. , БАШАРИН Н.И. 
Published: October 2022

В данной статье объектом исследований являются мерзлотные ландшафты. Целью работы является создание ГИСмоделей современной мерзлотноландшафтной обстановки на базе составленной в 2017 г. Мерзлотноландшафтной карты Республики Саха (Якутия) масштаба 1:1 500 000. Для достижения поставленной цели применялся метод ГИСмоделирования геокриологических условий Республики Саха (Якутия). В результате исследования с использованием атрибутивных таблиц составлены цифровые тематические карты современного состояния мерзлотных ландшафтов Якутии температуры грунтов, глубины деятельного слоя, льдистости отложений, глубины залегания повторножильных льдов на ледовом комплексе, мощности защитного слоя и распространения криогенных процессов. Проведен количественный анализ закономерностей их пространственного распределения. В статье использованы результаты работ, выполненные сотрудниками Института мерзлотоведения им. П.И. Мельникова СО РАН в 2018 г. В настоящее время приведенные выше цифровые тематические карты предлагается применить, как базовые характеристики для расчетов критических норм развития мерзлотных ландшафтов при разработке нормативных актов к Закону об Охране вечной мерзлоты в Республике Саха (Якутия) от 22.05.2018 г. Также они могут быть использованы для разработки стратегического планирования отдельных районов Республики Саха (Якутия) до 2032 и 2050 гг.
The article discusses permafrost landscapes. The aim of the work was to create GISmodels of the modern frostlandscape based on the permafrostlandscape map of the Sakha Republic (Yakutia) in 2017 at a scale of 1: 1,500,000. To achieve this goal, the method of GIS modeling of the geocryological conditions of the Sakha Republic (Yakutia) was used. As a result of the study, using digital attribute tables, digital thematic maps of the current state of the frozen landscapes of Yakutia were made, indicating the soil temperature, depth of the active layer, ice content of sediments, depth of revein ice on the ice complex, thickness of the protective layer, and distribution of cryogenic processes. A quantitative analysis of the laws of their spatial distribution was carried out. The article uses the results of the work carried out by employees of the Institute of Melnikov Permafrost Institute, SB RAS in 2018. Currently, the above digital thematic maps are proposed to be used as basic characteristics for calculating the critical norms for the development of permafrost landscapes when developing normative acts to the Law on the Protection of Permafrost in the Sakha Republic (Yakutia) of 22 May 2018. They can also be used to develop strategic planning of individual regions of the Sakha Republic (Yakutia) until 2032 and 2050.