bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of bearing material and clearance in a stern device on transverse vibrations parameters of a ship shaft model
Authors: Кушнер Гурий , Kushner Guriy , Мамонтов Виктор Андреевич , Mamontov Victor Andreevich 
Published: November 2019

The operating experience of the large-capacity vessels shafting illustrates a number of new technical problems, such as an increase in the number of accidents caused by damage to stern devices. A significant number of accidents associated with breakdowns of the propeller shafts due to exceeding the cyclic strength of their material, suggests the need for further study of the vi-brations of the shafting system. The creation of an experimental installation on the basis of the la-boratory of the ship shaft line of Astrakhan State Technical University provided experimental data under controlled test conditions. The design and operation principle of the experimental setup, which simulates the oscillations of a rotating shaft line model using various materials of shafts and bearings have been studied. The installation is a model of a ship shaft system, the shaft system
of which is driven by an asynchronous electric motor. The speed of the shaft system can be adjusted using a frequency converter. Measurement and registration of vibrations is carried out using
a hardware-software complex by the method of dynamic strain gauging. There have been shown the results of an experimental study of the parameters of transverse vibrations of a ship shaft model for various material of a stern bearing model and clearance in a stern device. The obtained dependences are represented by the Lagrange interpolation polynomial and response functions in the form
of a second-order polynomial. Verification of the compliance of the regression model of data variability was carried out using a multiple coefficient of determination. Bearing material and clearance in a stern device have a significant effect on the frequency of the onset of an unstable state of the installation shaft. The research results can be used in the calculation of transverse vibrations of ship shaft lines.
Studying start up properties of vortex diesels of collective rescue means of sea vessel crews using fuel magnetic treatment
Authors: Дорохов Александр , Dorokhov Aleksandr , Каргин Сергей Александрович , Kargin Sergey Aleksandrovich , Шахов Василий , Shakhov Vasily , Петровский Валерий , Petrovskiy Valeriy , Хуссам Еддин , Hussam Eddin 
Published: November 2019

The paper considers the diesel engines as the hearts of the lifeboat power plants
of all types of vessels: sea, river and mixed navigation, according to the International Convention on the Protection of Human Life at Sea - SOLAS. In the Russian Federation there are two types
of engines produced for this purpose: 4-9.5/11 (“Kaspiy 30”) with vortex-chamber mixing and
4-9.5/11 (“Kaspiy 40”) with a combustion chamber in piston and volume-film mixing. The Kaspiy 40 engine is characterized by good starting properties and does not require additional acceleration of the launch. The Kaspiy 30 engine, due to the design of the combustion chamber, must be equipped with a fuel mixture heating device in the combustion chamber, which must work before the engine reaches a stable mode of operation. This device is glow plugs powered by a rechargeable battery and connected sequentially, so that failure of one plug entails the inoperability of the entire chain. If the rescue operation is necessary, the lifeboat engines must be started on deck without
a coolant (sea water) in the cooling system and must work for at least 10 - 15 minutes until the crew gets into the boat and the boat is launched, after which the cooling system will take the sea water. If the glow plug system fails, especially when the ambient temperature is low, the start of the engine in the prescribed time may not take place at all. There has been studied the effect of magnetic treatment of fuel before the launch and during the launch on the activation energy of fuel molecules and their reaction in the combustion without external heat
Forecasting cargo arrival to sea terminal
Authors: Меньшиков Вячеслав , Menshikov Vyacheslav , Шутов Валентин , Shutov Valentin , Сандалов Артем , Sandalov Artem 
Published: November 2019

The paper highlights the operation processes at the terminals of the transport node, which, to a considerable extent, are defined by arrival different types of cargo. The cargo is usually delivered from the suppliers’ enterprises with the help of transport facilities (by train/motor transport). To plan the efficient functioning of the sea terminal there should be used the methods
of forecasting input cargo flows. It has been stated that most works devoted to forecasting traffic flows on cargo terminals are recommended to use information from the history (for which it is nec-essary to draw the arrays of well-known results of forecasting in different situation) based on the long-term analysis of the terminal operation. The above method of forecasting is of little use, when the supplier network and destinations of the cargo change frequently. A certain difficulty can pre-sent the choice of factors that define the situation at the sea terminal and the size of forecasted parameters of the cargo flow. There has been given an example of the practical forecasting of cargo arrival for handling at the sea terminal. The practical implementation of the formal dependence
of forecasting the cargo arrival for processing in the direction “coast-sea” at the marine terminal is presented in the sequence of four blocks: 1) the necessary values are calculated; 2) the arrived consignments are selected that have been sent on the same day and satisfy the columns of the matrix; 3) posterior probabilities for the columns of the matrix are calculated; 4) forecasting of consignments arrival is calculated. In the proposed universal method of forecasting the arrival of goods to the marine terminal in the transport hub in the coast-sea processing directions there is used not only statistic data on the duration of cargo transportation to the marine terminal, but also operational information on the arrival of individual consignments
Studying wear resistance of steel friction pairs under high contact pressure in water-abrasive medium
Authors: Петровский Валерий , Petrovskiy Valeriy , Рубан Анатолий , Ruban Anatoliy 
Published: November 2019

The paper is focused on the problem of the service life of the dredger chain, which largely depends on the efficiency and reliability of the hinge joint, when a mineral abrasive gets into the structural gap resulting in rapid wear of the joint under high dynamic loads. There has been developed a science-based technology of repairing parts of the assembly, without reducing the resource, from cheap and accessible (non-deficient) materials, taking into account modern technical and economic requirements, on samples. Wear resistance of samples of friction pairs has been defined in terms of a chain operating model. The research method is based on comparing the wear rate of samples in a pair made of steel 110Mn13 (sleeve - pin), 110Mn13 and 38CrNi3M (sleeve - pin), according to the standard technologies and taken as a reference, with pairs made of steel 110Mn13, C45K, facing with wire SV08A, electrodes E50A – UONI 13/55 and E – 190Cr5Si7 – LEZ – T – 590 – NG after heat treatment, chemical and heat treatment, surface plastic deformation. Samples were tested in the water-abrasive environment with a load of 6615 N (675 kgf). The wear resistance parameters were determined as following: 1) reference pairs of steel 110Mn13 (bushing-pin) and 110Mn13 (bushing), 38CrNi3Mo (pin); 2) pairs of steel 110Mn13 (bushing) and facing with wire SV08A (pin); 3) pairs of steel 110Mn13 (bushing) and cladding with electrodes
E–190Cr5Si7–LEZ –T–590– NG (pin); 4) pairs of steel C45K (bushing) and cladding with
E –190Cr5Si7 – LEZ – T – 590 – NG electrodes (pin); 5) pairs of steel C45K (bushing) and clad-ding with E50A – UONI 13/55 electrodes (pin). A graph of dependence of the bushing and pin wear on the relations of initial hardness and structures of friction pair has been built. It is recom-mended to restore the pin with wear-resistant electrodes E – 190Cr5Si7 – LEZ – T – 590 – NG paired with 110Mn13 steel bushing with surface plastic deformation. The wear resistance of a pair, with a different combination of structures, does not depend on the ratio of hardness of Hsl / Hfin. The materials of the pair worn within the reference samples can be recommended for the operational tests.
Studying influence of designed trim in small fishing vessels with great hull fullness on their seaworthiness
Authors: Чуреев Евгений , Chureev Evgeniy , Орлов Олег , Orlov Oleg , Якута Ирина , Yakuta Irina 
Published: November 2019

The paper highlights the problem of the small trawlers with great block coefficient, despite their optimal architectural and constructive characteristics for fishing in the Baltic Sea. it has been stated that when the expected speeds of the vessel are reached, their towing resistance increases greatly and a significant trim appears on the bow. To clarify the reasons there have been carried out the additional studies of the relation between changes in the landing gear and the towing resistance of the vessel in different modes of movement in order to select the optimum trim for the vessel. The test program included towing tests of a ship model in the speed range 4-12 knots
of a full-scale ship with one displacement value and different initial trim values at the stern. It has been inferred that at the stage of designing small fishing vessels (up to 24 meters long) it is advisa-ble to limit the maximum speed to 11 knots, which corresponds to a Froude number ≈ 0.4. Further increase in the speed of the vessel will result in rising a residual resistance coefficient considerably, which will lead to a disproportionate increase in the required power. The residual resistance coeffi-cient of the hull is minimal, provided that the vessel moves at the calculated speed with an even keel, while the optimum angle of the initial trim makes 1.0-2.5 degrees aft. Improper longitudinal balance of small fishing vessels with a large completeness of contours can lead to an increase in re-sidual resistance of up to 30%. The experimental results can be applied to all small fishing vessels with similar block coefficients. It has been recommended to conduct the full-scale tests with differ-ent ship models having various block coefficients in order to define the dependence between the completeness of the vessel and the value of drawdown.
GRAPHICAL ANALYSIS OF FREE-SURFACE WAVE FIELDS FROM MOVING SHIPS AND A PAIR OF CONSECUTIVE POSTS
Authors: Бимбереков Павел , Bimberekov Pavel 
Published: November 2019

The paper presents a comparison of the photographic material of the wave patterns resulted from the movement of a ship in situ and a model ship, as well as from two consecutive posts, their regularities being found through graphical processing. The possibility to find the fore imaginary source of Kelvin wave pattern forming the ship's wave system is given at a distance
of one wavelength before the top of the bow retaining wave. The equality of the length of trans-verse waves and divergent waves along the outer boundaries of the latter zone is fixed. It has been assumed that the intermediate waves generated between the main waves in the model ship and the posts are regular, imposition of wave patterns in a pair of consistently moving racks depending on the hit of the rear rack in the wave field of the first rack has been stated. Regularly occurring flows around moving posts are discussed. The bow and stern system of Kelvin waves in a ship wave sys-tem has been illustrated (the angle of the midpoint of diverging wave crests with the ship’s diamet-rical plane and the angle of diverging wave crests with the ship’s diametrical plane). The photo-graphs presented were taken in the experimental tank of Siberian State University of Water Transport (Novosibirsk State Academy of Water Transport) in 2006. A thin film naturally generat-ed on the water surface of the experimental tank and given a structure directed along the tank due to previous runs helped to visualize the distortion of the free water surface in better quality and to obtain clearly outlined contours in lighting.
Vers une perspective plurilingue et interculturelle dans la formation en langues étrangères à des étudiants indigènes en contexte universitaire
Authors: Arismendi Gómez Fabio Alberto , Ramírez Jiménez Denis 
Published: November 2019

Dans cet article, nous étudions les implications d’avoir des étudiants indigènes dans les programmes de formation au niveau universitaire. Cette discussion surgit à partir des résultats d’une étude de cas menée dans un programme de licence en langues étrangères (anglais et français) dans une université colombienne. Huit étudiants en provenance de différentes communautés du pays y ont participé. La collecte de données s’est effectuée principalement lors des entretiens individuels et collectifs menés auprès des étudiants ainsi que des entretiens en groupe focalisé (focus group) menés auprès de leurs enseignants. Les résultats suggèrent des implications dans trois domaines : au niveau institutionnel, au niveau pédagogique et didactique, et au niveau estudiantin. Une perspective d’éducation plurilingue et interculturelle peut éclairer les différentes actions qui pourraient se mettre en œuvre dans chacun de ces domaines, afin de contribuer à une éducation en langues étrangères plus juste et équitable.
An Update of Systematic Reviews Examining the Effectiveness of Conservative Physical Therapy Interventions for Subacromial Shoulder Pain
Authors: Pieters Louise , Lewis Jeremy , Kuppens Kevin , Jochems Jill , Bruijstens Twan , Joossens Laurence , Struyf Filip 
Published: November 2019

Objective To update a systematic review published in 2013 that focused on evaluating the effectiveness of interventions within the scope of physical therapy, including exercise, manual therapy, electrotherapy, and combined or multimodal approaches to managing shoulder pain. Design Umbrella review. Literature Search An electronic search of PubMed, Web of Science, and CINAHL was undertaken. Methodological quality was assessed using the AMSTAR (A MeaSurement Tool to Assess systematic Reviews) checklist for systematic reviews. Study Selection Criteria Nonsurgical treatments for subacromial shoulder pain. Data Synthesis Sixteen systematic reviews were retrieved. Results were summarized qualitatively. Results A strong recommendation can be made for exercise therapy as the first-line treatment to improve pain, mobility, and function in patients with subacromial shoulder pain. Manual therapy may be integrated, with a strong recommendation, as additional therapy. There was moderate evidence of no effect for other commonly prescribed interventions, such as laser therapy, extracorporeal shockwave therapy, pulsed electromagnetic energy, and ultrasound. Conclusion There is a growing body of evidence to support exercise therapy as an intervention for subacromial shoulder pain. Ongoing research is required to provide guidance on exercise type, dose, duration, and expected outcomes. A strong recommendation may be made regarding the inclusion of manual therapy in the initial treatment phase. J Orthop Sports Phys Ther 2020;50(3):131–141. Epub 15 Nov 2019. doi:10.2519/jospt.2020.8498
Aggressive granular cell tumor of the neurohypophysis with optic tract edema and invasion into third ventricle
Authors: Dai Yufei , Hagen Matthew , Andaluz Norberto , Bhabhra Ruchi 
Published: November 2019

Background:
Granular cell tumors (GCTs) of the neurohypophysis are parasellar tumors arising from pituicytes in the neurohypophysis and are generally considered benign slow-growing tumors. We present a case of sellar GCT with aggressive features.

Case Description:
A 70-year-old female presented with progressive vision impairment found to have bitemporal visual field defects. Subsequent magnetic resonance imaging (MRI) revealed a 2.9 cm × 2.5 cm × 2.5 cm parasellar mass with extension into the third ventricle and causing optic tract edema (OTE). Right frontotemporal orbital craniotomy was performed and the tumor was partially removed to decompress optic nerves. Pathology identified the tumor as granular tumor of the sellar region. The patient’s vision improved minimally after the surgery. Follow-up MRI after 3 months and 11 months showed stable left OTE.

Conclusion:
GCTs were thought to be benign tumors with slow growth, but they could potentially possess aggressive features and invade into surrounding structures as described in this case. OTE can be a rare MRI finding of GCTs. Only one case of GCT-related OTE has been reported in literature to our best knowledge.
Minimally invasive cervical laminectomy for spondylotic myelopathy in medically fragile patients
Authors: Ross Donald A. , O’Glasser Avital Y. 
Published: November 2019

Background:
Cervical spondylotic myelopathy often affects elderly and fragile patients who are not optimal candidates for major surgical procedures. Here, we report patients previously judged not suitable for cervical surgery, who were successfully treated with minimally invasive (MI) cervical decompressions without complications.

Methods:
Retrospectively, we reviewed medically fragile patients (e.g., too many comorbidities), previously deemed unsuitable for surgery who successfully tolerated MI cervical decompressions. The accompanying preoperative comorbidities, surgical risks, complications, and neurological outcomes were assessed.

Results:
Three male patients, with a mean age of 73 years, exhibited an average preoperative modified Japanese Orthopedic Association (mJOA) score of 8. The preoperative Charlson comorbidity indices, the Elixhauser comorbidity indices (respectively averaging 5.7 and 5.7 points, the preoperative Edmonton fragility index (average 12 points), and national surgical quality improvement program risks were calculated. Surgical times averaged 185 min and patients were followed for an average of 11.3 months. No patient had any immediate or delayed postoperative complications. The length of hospital stay was 1 day for each patient. The postoperative mJOA scores averaged 11, which was clinically significant. Further, the postoperative magnetic resonance imaging obtained approximately 3 months postoperative demonstrated adequate cord decompression.

Conclusion:
Medically fragile patients with significant cervical spondylotic myelopathy but major comorbidities precluding major surgery successfully underwent MI cervical decompressions.
Efektivitas Vitamin C Pada Daun Kelor Terhadap Bilangan Peroksida Dari Minyak Jelantah
Authors: Kartikorini Nastiti 
Published: November 2019

Used cooking oil is a cooking oil that has been used several times. Used cooking oil undergoes an oxidation reaction to produce high peroxide compounds. Phenolic compounds are primary antioxidants contained in Moringa leaves which slow the oxidation down in used cooking oil so that it can be stored longer.
Formulation of the problem in this study was whether there was an inhibitory test on Moringa oleifera Leaves powder on the peroxide value in used cooking oil. The purpose of this study was to determine the inhibition of Moringa leaves powder to peroxide value on used cooking oil. This type of research was an experimental i.e. to determine whether there was the inhibition of Moringa leaves powder to the peroxide value in used cooking oil. The sample in this study was 5 samples from 6 fried traders, and repeated 5 times so that the total sample was 25 samples. Peroxide levels could be decreased due to the antioxidant content found in Moringa leaves. Antioxidants found in Moringa leaves are phenolic components. Phenolic components can inhibit free radicals and inhibit peroxide value to decrease. Moringa was suitable for areas where strong and long winds, drought occur simultaneously, and cause serious soil erosion. Nutrient content in deciduous leaves could fertilize and improve marginal soil quality (Dudi, 2015). Therefore, Moringa leaves not only have high antioxidants but also could be found easily in Surabaya.
From the results of peroxide levels test, it was known that the average peroxide value in used cooking oil without Moringa leaves was equal to 23,9957 mEq and with Moringa leaves by different time variation i.e. 1 day (14,3182 mEq), 2 days (10,7987 mEq), 3 days (6,1593 mEq), 4 days (3,0397 mEq). Statistical analysis with Anova test showed the inhibition of Moringa leaves powder to decrease in peroxide value on used cooking oil with a value of p (sig) = 0,000 which was less than 0.05. Based on the results of the Tukey HSD test, the most effective soaking of Moringa leaves powder for 4 days was to reduce peroxide levels in used cooking oil by giving 5gr Moringa leaf powder with 100ml used cooking oil.
Keywords : Levels of Peroxide Value, Moringa Leaves, Used Cooking Oil
Prevalence and nature of psychiatric disorders in geriatric people attending psychiatry outpatient department
Authors: Poudel R , Belbase M 
Published: November 2019

Introduction: Geriatric population is growing faster than all younger age groups. More than 20% of the geriatric people suffer from a mental or neurological disorder. Various studies have been conducted in Nepal related to mental and neurological disorders in geriatric people including epidemiological survey, outpatient department (OPD) based studies and inpatient studies. The aim of the present study was to determine the prevalence and nature of psychiatric disorders in geriatric subjects
Material And Method: Geriatric subjects attending outpatient department of psychiatry, Nepalgunj Medical College Teaching Hospital (NGMCTH), Kohalpur, Nepal from January to August 2018 (8 months) were enrolled for the study. Ethical clearance was obtained from the Institutional Review Committee of the NGMCTH and written consent was taken from the subjects or next to kin. Socio-demographic profile and other details of the subjects were obtained. Diagnosis was made using the ICD 10. Data was analyzed using Statistical Package for the Social Sciences (SPSS) version 21.0 for Windows.
Results: The prevalence of psychiatric disorders in geriatric subjects was 6.25%. The mean age of the subjects was 68.6 ± 7.39 years. Female constituted 51.1% of the subjects while male 48.9%. Category wise, mood disorders was the most common diagnosis (44.9%) followed by organic disorders (20.2%) and neurotic disorders (12.9%) respectively. Mood disorders and organic disorders were significantly associated with the age of the subjects (p<0.05). Disorder wise, depression was the most common diagnosis (39.9%) followed by dementia (12.4%) and anxiety disorder (10.1%) respectively. Dementia and delirium were the only disorders significantly associated with the age of the subject (p=0.01). There was no statistically significant association of individual disorders with sex of the subjects.
Conclusion: Depression, dementia and anxiety disorder was the most common diagnosis in geriatric people.