bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hydro-elastic analysis of carbon composite marine propeller using co-simulation technique
Authors: Kumar A , Subramanian V A , Vijayakumar R 
Published: December 2019

Carbon fibre composite has extremely high strength, low density and no corrosion in sea water. These characteristics make it a favourable alternative for consideration as material for marine screw propellers. The obvious advantages are lightweight propeller, resistance to corrosion, and possibly favourable fatigue characteristics. As against this, the relatively higher flexibility of material needs investigation since change of geometry due to load on the blades can affect the hydrodynamic performance. These materials are reduced stiffness and anisotropic in nature, and therefore hydro-elastic based performance analysis is required to understand their performance in operating condition. The current study focuses on numerical investigation for the hydro-elastic based performance analysis of a composite marine propeller in open water condition. The procedure involves the coupling of Reynolds-Averaged Navier-Stokes Equation (RANSE) based Computational Fluid Dynamics (CFD) solver with the Finite Element Method (FEM) solver using Co-Simulation technique. The open water characteristics including thrust coefficient (KT), torque coefficient (KQ), and open water efficiency (ηo ) analyzed as a function of the advance ratio (J). This paper presents a comparison of the hydrodynamic performance between the composite propeller and a conventional steel propeller taking into account the structural response under loading. The results for the composite propeller show improved thrust value in comparison with the conventional metallic propeller.
Concept Design of a Bulk Carrier Retrofit with LNG Fuel
Authors: CK Tam I , Kr Dev A , Ng CW , Deltin L , Stoytchev I 
Published: December 2019

This report showed a case study of a mini-cape size bulk carrier of being retrofitted for Liquefied Natural Gas (LNG) fuel and the selection of its new fuel tanks to meet the stringent emissions requirement. The vessel was equipped with a dual fuel ready (DFR) engine before the retrofit. Engine manufacturer will supply and replace engine parts for LNG fueled operations with no significant modification of the engine structure required. The detailed engineering design considerations were studied with cost reduction and minimum downtime set as ultimate objectives. Top-down and bottom-up approaches for cost estimation are used in this analysis. The analysis was determined by life cycle cost and management costs. The cost analysis showed the payback period of an LNG fueled ship retrofit is 4.5 years against a 0.5%S compliant fueled vessel. The payback period is considered reasonable and it shows retrofitting vessels for LNG fuel as an attractive option in meeting new regulation for ship-owners. If the shipyard standardizes the tank construction including outfitting, the specified cost may even go lower. A further reduction is also anticipated with repeating orders of similar vessels.
Kapari bitkisinin bioaktif, farmakolojik etkileri ve nörodejeneratif hastalıklarda kullanımı
Authors: KART Asım 
Published: December 2019

Kapari
olarak bilinen Capparidaceae ailesine
ait bitki türleri başlıca dünyanın sıcak bölgelerinde yaygın
olup, Capparis spinosa (C. spinosa), Capparis ovata (C. spinosa) ve
Capparis decidua (C. deciduas)
terapötik ve besinsel özellikleri yönünden en yaygın araştırılan türleridir.
Bitki yapısında
birçok fitokimyasal içermekte olup, farmakolojik ve terapötik etkilerinden
dolayı halk arasında birçok hastalığın tedavisinde kullanılmıştır. İçeriğinde alkaloidler ve fitosteroller, flavanoidler,
fenolik asitler, glikosinolatlar, antioksidanlar, quarterner amonyum
bileşikleri ve vitaminlerin bulunduğu tespit edilmiştir. Kapari bitkisinin
yaprak ve tomurcuklarının fenolik bileşiklerden oldukça zengindir. Bu
bileşikler serbest radikal süpürücü özelliklere sahiptir ve içerdiği fenolik
bileşikler önemli bir fitokimyasal antioksidan grubunu oluşturmaktadır. C.
spinosa önemli miktarda rutin ve quercetin içermektedir. Yapılan çalışmalarda
kaparinin analjezik, anti-inflamatuar, antioksidan, antitümöral, diüretik,
antidiyaretik, hipoglisemik, balgam söktürücü, antibakteriyel, antialerjik,
antihipertansif, antifungal, antihiperlipidemik etkileri gösterilmiştir. Bu
etkilerinin yanı sıra kapari ailesine ait bitki türlerinin sinir doku üzerinde görülen
ve tedavi olanaklarının sınırlı olduğu bazı nörodejeneratif bozukluklarda etkilerinin
olduğu da son yıllarda bildirilmektedir. Kapari türlerinin sedatif,
antikonvülsant, analjezik, antiepileptik etkilerinin olduğu, ve multiple
sclerosis, Alzheimer ve diğer merkezi sinir sisteminin nörodejeneratif tipte
hastalıklarında faydalı ve tedavi edici etkilerinin olduğu rapor edilmiştir.
Yapılan çalışmalar ve bunların sonucu capari bitkisinin bu tip bozukluklarda
umut vaat eden alternatif bir tedavi aracı olarak kullanılabileceğini
göstermektedir.
Indicators of microcirculation in patients with type 2 diabetes with diabetic peripheral neuropathy during therapy with various doses of vitamin D
Authors: Stepanova A. P. , Karonova T. L. , Galagoudza M. M. 
Published: December 2019

Aim of the study. To study the effect of therapy with prophylactic and supraphysiological doses of cholecalciferol on skin microcirculation (MC) indicators in patients with type 2 diabetes mellitus with diabetic peripheral neuropathy (T2DM with DPN).Material and methods. The study included 62 participants with T2DM with DPN (according to the Neuropathy Disability Score (NDS) scale, more than 4 points). By the method of consecutive numbers, patients were randomized into two groups: Group I (n=31, 15 men/16 women, 52.4±5.7 years) and Group II (n=31, 16 men/15 women, 51.4±6.1 years). Antihyperglycemic treatment was stable during the study. For 24 weeks, cholecalciferol participants from Group I received once a week at a dose of 5,000 IU, and from Group II - once a week at a dose of 40,000 IU. Body mass index (BMI), serum levels of 25(OH)D (25-hydroxycalciferol) and serum glycated hemoglobin (HbA1c) were evaluated before and after 24 weeks of taking cholecalciferol. The method of laser Doppler flowmetry (LDF) compared the initial and final indicators of the baseline level of blood flow and microcirculation indicators against the background of functional tests (postural and occlusive). Control measurements of LDF parameters were performed on 16 subjects without revealed diabetes mellitus (8 men/8 women, 51.8±3.7 years).Results. Patients from Group II, after 24 weeks of taking supraphysiological doses of cholecalciferol, against the background of 100% normalization of the serum 25(OH)D level, significantly improved the parameters of skin MC and functional tests, HbA1c and BMI decreased.Conclusions. Acceptance of high doses of cholecalciferol for 24 weeks has been associated with an improvement in the parameters of glycaemia and indicators of cutaneous MC in patients with T2DM with DPN.
Specificity of manifestation of functional asymmetry microcirculation parameters at physical loads on the upper limbs
Authors: Mezentseva L. V. 
Published: December 2019

Purpose – the study the functional asymmetry of oscillatory processes of microcirculatory bed at physical loads on the upper limbs.Material and methods. Microcirculation parameters were measured in 5 healthy volunteers (men aged 50–55 years) by laser Doppler flowmetry (LDF). LDF signal sensors were fixed symmetrically on the lower parts of the right and left shoulders (3 cm above the elbow bend). Physical exercise consisted of machs left or right hand in the standing position for 1 min. Measurements were performed in 3 conditions: 1 – initial state, 2 – immediately after exercise, 3 – 5 min after load termination The changes in the mean perfusion value and the components of the amplitude-frequency spectrum of blood flow fluctuations (myogenic, neurogenic, respiratory and cardiac), as well as the correlation between the changes in all parameters of the right and left sides of the observation were evaluated.Results. Asymmetry of changes in microcirculation parameters and correlations between them under the physical loads on the upper limbs was revealed. It is shown that both left and right machs change the microcirculation parameters of both the left and right sides, and the changes on the left are more pronounced than on the right. It is shown that after the left machs the blood flow on the left and right increases, and after the right machs – reduced. After loads the right side is recovering more slowly than the left.Conclusions. Our results illustrate the specific regulation of blood flow in micro vessels of paired organs, which is associated with functional asymmetry. The physiological mechanisms for this asymmetry require further experimental and clinical studies.
Blood flow modification attached to HIFU exposure mast cell degranulation
Authors: Faizullina D. R. , Grizunov V. V. , Berkovich A. E. 
Published: December 2019

Introduction. One of the promising methods of treating oncological diseases is high-frequency focused ultrasound (HIFU). The high-frequency acoustic field generated by the emitters induces mechanothermal effects whose significance has not yet been fully assessed and their study will change the tactics of therapy. To analyze their role, we selected cellular perivascular regulators of local blood flow – mast cells (MCs). Changes in the microcirculation (MCT) allow us to judge the morphofunctional state of the MC. The aim of the study is to assess the state of the rat’s skin periphocal tissue blood flow and MCs morphofunctional properties after HIFU-exposure.Material and methods. Adult male Wistar rats were used. Animals were divided into 3 groups: control, non-contact local heating of the skin and HIFU-induced exposure. For HIFU, an experimental setting was used, consisting of a concave emitter H-148 S / N 010 with a central oscillation frequency of 1.4 MHz. In the averaged interference spot, the radiation intensity was 8.2 kW/cm2. The exposure duration from 150 to 700 ms. Depth of focus is about 1 mm. To assess the MCT, a laser doppler flowmeter was used. Material for the manufacture of film preparations of MCs was taken at the site of exposure and according to the standard method. MCs calculation was carried out using the software «Multimedia Catalog» taking into account their morphofunctional characteristics.Results. HIFU exposure led to a significant increase in blood flow in rat’s skin at an exposure time of 250 ms or more (p<0.01). The maximum increase in perfusion was noted at 400 ms. The highest increase in tissue blood flow with local heating was observed at 45°C (p<0.001). HIFU-exposure led to a significant decrease in the density of MCs in the subcutaneous fat tissue of rat’s skin compared with the control at an exposure time of 250 ms or more (p<0.05) and a significant decrease in the relative number of type I cells, and an increase in type II and III, which indicates degranulation (p<0.05). Similar changes in the amount and morphofunctional characteristics of MCs were observed in a series of experiments with local heating, but the changes were not so significant.Conclusions. With HIFU-induced exposure, increased MCT in the peripheral zones is observed, accompanied by processes of morphofunctional rearrangement of the MCs, which indicates a combined mechanothermal disturbance in the focus zone, which forms the spatiotemporal continuum of the thermal field.
Pure and SrBa Dual Doped ZnO Nanoparticles Prepared by Co-precipitation Method and Their Structural, Optical and Antimicrobial Properties
Authors: Karthikeyan M. , Ahamed A. Jafar , Kumar P. Vijaya 
Published: December 2019

The present investigation, the successful preparation of pure ZnO (Z1) NPs and SrBa dual doped ZnO (Z2) NPs by chemical co-precipitation technique without use of any capping agent. The structural and morphological properties of Z1 and Z2 NPs were analyzed using X-ray diffraction (XRD) studies, Field emission scanning electron microscopy (FESEM), Elemental analysis (EDAX), Fourier transform infrared spectroscopy (FTIR). An optical property was studied by UV–Vis spectroscopy and Photoluminescence (PL) spectra. The antimicrobial activity of Z1 and Z2 NPs has been investigated against Staphylococcus aureus and Klebsiella pneumoniae bacterial strains. It has been interestingly observed that Z2 NPs has enhanced the inhibitory activity than that of Z1 NPs against S. aureus and more efficiently than the K. pneumoniae bacterial strain.
Authors: Aryanto Christ Billy , Aditama Silvester Bambang 
Published: December 2019

Beberapa orang memiliki kebiasaan untuk mendengarkan musik sambil membaca buku. Jenis musik dan tempo musik yang dapat didengarkan ketika membaca buku mungkin berbeda-beda. Penelitian ini secara spesifik dilakukan untuk mengetahui apakah musik klasik bertempo lambat memiliki pengaruh terhadap pemahaman bacaan mahasiswa. Penelitian ini merupakan penelitian eksperimental dengan desain randomized two-groups design, post-test only. Partisipan dalam penelitian ini terdiri dari 78 mahasiswa yang dibagi dalam dua kelompok yaitu kelompok eksperimen (38 partisipan) dan kelompok kontrol (40 partisipan) dengan rentang usia 18-24 tahun. Partisipan dibagi ke dalam dua kelompok menggunakan teknik randomisasi. Musik klasik yang digunakan dalam penelitian ini berjudul Clair de Lune karya Claude Debussy dan menggunakan alat ukur TKD-1R untuk mengukur pemahaman bacaan. Hasil dari penelitian ini menunjukkan bahwa musik klasik, khususnya dengan tempo yang lambat, tidak memiliki pengaruh yang signifikan terhadap pemahaman bacaan. Hasil dari penelitian ini mendukung penelitian sebelumnya yang menjelaskan bahwa musik klasik, secara khusus yang memiliki tempo lambat, tidak mengganggu partisipan. Sehingga kegiatan membaca sambil diperdengarkan musik dapat dilakukan secara bersamaan.
Kata kunci: mahasiswa, musik klasik, pemahaman bacaan, tempo lambat
AS REFORMAS TRABALHISTAS NO MUNDO: A FLEXIBILIZAÇÃO NO TEMPO DE TRABALHO E NA REMUNERAÇÃO COMO VETOR DE PRECARIZAÇÃO
Authors: Lins Vinicius Ferreira , Silva Adalberto Oliveira da 
Published: December 2019

<p>O objetivo deste artigo é a discussão sobre os impactos no tempo de trabalho e na remuneração diante das experiências de reformas trabalhistas, pois entendemos que surgem evidências de aumento da precarização do trabalho. Constata-se um processo de polarização, em razão da possibilidade de uma situação de tendência de limite zero para a utilização da força de trabalho e, consequentemente, da remuneração recebida diante das relações de trabalho flexíveis. Para a caracterização deste processo, centramos a nossa atenção em dois aspectos: o primeiro, condiz com os impactos nas relações de trabalho decorrentes dos diferentes tipos de contrato de trabalho, onde a flexibilização do tempo de trabalho e da remuneração se tornam evidentes; o segundo, refere-se ao processo de polarização em si, que possibilita a inexistência de jornadas e salários garantidos, por parte dos trabalhadores, representando uma condição de subsunção real do trabalho ao capital. Diante de dados empíricos de países selecionados, no período de 2000 a 2017, apresentamos evidências de subutilização da força de trabalho e de precariedade salarial, constituindo vetores de precarização decorrentes do processo de flexibilização dos mercados de trabalho.</p><p> </p>
OS IMPACTOS JURÍDICOS DAS REFORMAS TRABALHISTAS E A (RE)MERCADORIZAÇÃO DO TRABALHO NAS EXPERIÊNCIAS INTERNACIONAIS
Authors: Filgueiras Vitor Araújo , Souza Ilan Fonseca de , Oliveira Gabriela De Freitas 
Published: December 2019

<p>O objetivo deste texto é apesentar e debater o conteúdo e as consequências jurídicas da(s) reforma(s) trabalhista(s) em alguns países (Espanha, França, Alemanha, Reino Unido, México e Coreia) nas últimas décadas, comparando-os com o caso brasileiro após a implementação das leis n. 13.429/17 e 13.467/17. A despeito das particularidades de cada país, e das mudanças legais em cada um deles não serem unívocas, é possível identificar a tendência de redução da proteção ao trabalho em aspectos que vão da contratação à saúde e segurança. Ao redor do mundo, as reformas (re)mercadorizam o trabalho, associando a retirada de direitos trabalhistas ao aumento do poder de mando dos empregadores. A reforma trabalhista brasileira teve como um dos principais impactos o acesso à justiça do trabalho, consequência que repercute em outros direitos trabalhistas. Os dados pesquisados evidenciam redução substancial na quantidade de ações trabalhistas ajuizadas após reforma; no entanto, a dinâmica do mercado de trabalho e as estatísticas oficiais indicam que o suposto excesso de demandas decorre de um descumprimento sistemático às normas de regulação do trabalho. A reforma trabalhista brasileira, ao afastar os trabalhadores da justiça do trabalho, incentiva o descumprimento da legislação, reduzindo a efetividade dos direitos ainda existentes.</p><p> </p>
Tomographic mapping of buccal shelf area for optimum placement of bone screws: A three-dimensional cone-beam computed tomography evaluation
Authors: Kolge Neeraj Eknath , Patni Vivek J. , Potnis Sheetal S. 
Published: December 2019

Introduction:
Buccal shelf bone screws have become increasingly popular as a preferred method of skeletal anchorage in the mandibular arch. Anatomic variations and clinical experience suggest that width and slope of the bone at buccal shelf vary in different population groups, with some individual variations.

Aims and Objectives:
The objective of this study was to evaluate angulation of the bone screw of mandibular buccal shelf area, total bone width, thickness of the cortical bone, and proximity to neurovascular structures.

Materials and Methods:
Cone-beam computed tomography scans were used to obtain measurements of the buccal shelf region of 35 patients (18 females, 17 males; mean age, 23.6 years). Measurements were taken at three locations (L1, L2, and L3) and total bone width was measured at two levels from the cementoenamel junction (CEJ, H1 and H2). Bone screws were virtually placed and their proximity evaluated from digitally traced inferior alveolar neurovascular bundle.

Results:
Permissible angulation for placement of buccal shelf bone screw considering the safety distance from the root and avoiding excessive buccal projection to minimize cheek irritation was found to be 74.48 (SD ± 4.26). Total bone width was maximum at the distobuccal cusp of mandibular second molar (L3H2; 6.40 ± 1.35) when measured at the level of 8 mm from the CEJ. Bone screws were well within the safety range from causing any iatrogenic damage to the inferior alveolar neurovascular bundle at all the three aforementioned locations.

Conclusion:
Thus, area buccal to the mandibular second molar region seems to be the most favorable site for placement of buccal shelf bone screws in Indian patients.
“Snake Sign” Secondary Sign of Achilles Tendon Rupture
Authors: Iqbal Aamer , Panchal Hiten , Rajakulasingam Ramanan , Shah Amit , Varaprasad Vemuri , James Steven , Botchu Rajesh 
Published: December 2019

Objective:
We describe a secondary sign (Snake sign) due to lax plantar fascia in full-thickness rupture of Achilles tendon.

Materials and Methods:
A 100 consecutive magnetic resonance images with intact Achilles tendon and second group of 17 patients with Achilles tendon rupture (ATR) were analyzed for Snake sign and angle between the achilles tendon and plantar fascia (APA) was calculated.

Results:
Significant decrease in the APA (P < 0.0001) with ATR and Snake sign was present in 8 of the 17 cases in the second cohort.

Conclusion:
Snake sign and APA are useful secondary signs for ATR.
ANALYSIS OF THE CYCLICAL GROUND CUTTING
Authors: Nikolayev V. A. 
Published: December 2019

Introduction.Rotary rippers are needed for cyclical cutting of the ground when the underlying layer and slopes of the roads are formed. Therefore, the general purpose of the research is the theoretical justification of the design and mode of rotary ripper’s parameters. Using the synthesis method, researches get only indicative results. In order to calculate the parameters of ground cutting, it is necessary to analyze the interaction of working bodies with the ground.Materials and methods.Based on the planned ways to reduce the cost of energy for cyclical cutting of the ground, the author developed the calculation method of the working body: the force of cutting the ground with the toe of the working body; the force necessary for the primary shift of the ground by the front surface of the working body; the total force of ground displacement by an active working body; the friction of the side surfaces of the working body on the ground during the rotation.Results.The author calculated the specific values in the process of rotation by using the developed method of determining the parameters of the cyclic ground cutting and basing on the accepted data. Moreover, the author constructed and approximated the graphs’ dependencies of ground cutting parameters of the rotor angle. In particular, there were dependencies: the force required to shift the ground by an active working body, the mass of the displaced ground, the acceleration of the displaced ground, the force needed to accelerate the displaced soil, the force of the ground’s impact on the side surface of the displaced ground wedge, the friction force displaced by the active working body of the ground wedge on the array of soil, the total force of the displacement of the ground by the active working body from the angle of the rotor when moving the unit at various transmissions II range of tractor HTP-17221.Discussion and conclusions. The method of calculating the forces of the ground cutting and calculating their specific values helps to determine the required rotational moment and power of the rotor drive.The author has read and approved the final manuscript. Financial transparency: the author has no financial interest in the presented materials or methods. There is no conflict of interest.