bluuebunny/crossref_metadata_2025 huggingface dataset:
Diagnostic accuracy of haemophilia early arthropathy detection with ultrasound (HEAD-US): a comparative magnetic resonance imaging (MRI) study
Authors: Plut Domen , Kotnik Barbara Faganel , Zupan Irena Preloznik , Kljucevsek Damjana , Vidmar Gaj , Snoj Ziga , Martinoli Carlo , Salapura Vladka
Published: June 2019

Background

Repeated haemarthroses affect approximately 90% of patients with severe haemophilia and lead to progressive arthropathy, which is the main cause of morbidity in these patients. Diagnostic imaging can detect even subclinical arthropathy changes and may impact prophylactic treatment. Magnetic resonance imagining (MRI) is generally the gold standard tool for precise evaluation of joints, but it is not easily feasible in regular follow-up of patients with haemophilia. The development of the standardized ultrasound (US) protocol for detection of early changes in haemophilic arthropathy (HEAD-US) opened new perspectives in the use of US in management of these patients. The HEAD-US protocol enables quick evaluation of the six mostly affected joints in a single study. The aim of this prospective study was to determine the diagnostic accuracy of the HEAD-US protocol for the detection and quantification of haemophilic arthropathy in comparison to the MRI.

Patients and methods

The study included 30 patients with severe haemophilia. We evaluated their elbows, ankles and knees (overall 168 joints) by US using the HEAD-US protocol and compared the results with the MRI using the International Prophylaxis Study Group (IPSG) MRI score.

Results

The results showed that the overall HEAD-US score correlated very highly with the overall IPSG MRI score (r = 0.92). Correlation was very high for the evaluation of the elbows and knees (r ≈ 0.95), and slightly lower for the ankles (r ≈ 0.85).

Conclusions

HEAD-US protocol proved to be a quick, reliable and accurate method for the detection and quantification of haemophilic arthropathy.
Retrospective analysis of complications and survival in patients with acute inferior myocardial infarction accompanied by right ventricular myocardial infarction
Authors: Neverauskaitė-Piliponienė Gintarė , Kūgienė Rasa , Petrulionienė Žaneta , Šerpytis Pranas
Published: June 2019

Right ventricular myocardial infarction (RVMI) accompanies about 30–50% of inferior wall myocardial infarction. RVMI is associated with higher rates of cardiogenic shock, atrioventricular block, atrial fibrillation, increased mortality rates. The topic requires a scientific update, as only a few studies have been made on RVMI during the past decade. We aimed to analyse the impact of RVMI on inferior myocardial infarction.

Design and methods: Retrospective study included 310 patients with documented inferior myocardial infarction (with and without RVMI) between January 2013 and January 2014. Data on baseline characteristics, mortality, in-hospital complications: cardiogenic shock and rhythm and conduction disorders was collected.

Results: In 102 (32.9%) patients with inferior myocardial infarction, RVMI was present and 208 (67.1%) cases were without RVMI involvement. RVMI patients had higher rate of rhythm and conduction disturbances than patients without RVMI involvement: atrioventricular block (OR 3.8, 95% CI 2.0–7.1, p < 0.001), atrial fibrillation (OR 1.6, 95% CI 0.9–2.9, p = 0.001), also higher incidence of cardiogenic shock (OR 2.6, 95% CI 1.7–3.9, p < 0.001). Mortality rates after 24 months were higher in RVMI group (OR 1.8, 95% CI 1.2–3.8, p = 0.034). No significant difference was found on in-hospital mortality.

Conclusions: Right ventricular involvement complicates the long-term mortality and outcomes after inferior myocardial infarction. It is related to a higher incidence of in-hospital complications, especially I–III degree AV block and atrial fibrillation. However, influence on long-term mortality needs further investigation.
The Possibility of Ultraviolet Enceladus’ Observations from Stratospheric Balloons
Authors: Kotlarz Jan , Zalewska Natalia
Published: June 2019

Stratospheric balloons are very important sources for space and terrestrial observation experiments in many disciplines. Instruments developed for astrophysical measurements are usually reusable. It is also possible to observe both hemispheres including observations from the polar and equatorial regions for thirty days or even longer. On the other hand the UV atmospheric transmittance window was used for the astrophysical observations less often than visible optical bands. At the end of the 2017 there are a few scientific groups working on near-UV or UV spectrographs and cameras for balloon flights.

In this paper we are discussing the possibility of ultraviolet measurement of Enceladus, an icy Saturnian moon, surface reflectance between 200 and 400 nm from the 20-50 km altitudes. At visible and near infrared optical channels Enceladus’ reflectance is very high (near 1.0). This value is consistent with a surface composed of water ice, however at some ultraviolet wavelengths Enceladus reflectance is lower than it would be expected for this type of surface. The scientific research done in the last decade was focused on H2O, NH3, and tholin particles detection on the Enceladus’ surface as a reason of low UV reflectance phenomenon. Continuous observation of Enceladus’ UV reflectance variability from stratospheric balloons may be interesting and may give us the proof of the presence of biomarkers or/and tholin particles.
Estimation of an Airfoil Drag at High Angles of Attack from PIV Data
Authors: Karr Austin M. , Stryczniewicz Wit
Published: June 2019

The paper presents application of Particle Image Velocimetry for determination of an airfoil’s drag coefficient in wind tunnel tests. The purpose of the study was to investigate the feasibility of using PIV as an alternative to pressure rake measurements, especially at high angles of attack. The integral momentum concept was applied for determination of fluid drag from experimental low speed wind tunnel data. The drag coefficient was calculated from velocity and pressure rake data for intermediate angles of attack from 5° to 10°. Additionally, the experimental results were compared to panel method results. After validating the procedures at low angles of attack, the drag coefficient was calculated at close to critical angles of attack. The presented study proved that PIV technique can be considered as an attractive alternative for drag coefficient determination of an airfoil.
Antidiabetic Action of Alfalfa (Medicago sativa) Leaves Powder on Type II Diabetic Patients
Authors: Salih Burhan A. , Azeez Kokaz O.
Published: June 2019

Type II diabetes is a common metabolic disorder that is specified by hyperglycemia resulting from defects in insulin action. Alfalfa (Medicago sativa) is a medicinal plant (leaves, flower, and seeds) used traditionally as antidiabetic. This study is designed to investigate the short-term antidiabetic action of alfalfa leaves powder in patients with Type II diabetes mellitus. 12 volunteers suffering from type II diabetes were undertaken besides 12 healthy individuals. The subjects were divided into four groups including healthy control, diabetic control, which received an only meal, and the third and fourth groups were healthy and diabetic subjects which received alfalfa leaves powder within the meal. A standard test meal was supplemented with 8 g of alfalfa. The results showed that alfalfa leaves significantly (P = 0.03) reduces blood sugar 2 h after meal from 344.4 mg/dl to 300.75 mg/dl in the diabetic subject, in addition to the elevation of serum insulin levels (P = 0.02) at 30 min and elevation further creased (P = 0.06) at 120 min. This finding suggested that alfalfa leaves could be applied as a therapy against Type II diabetes.
An Amphiphilic Polymer-Supported Strategy Enables Chemical Transformations Under Anhydrous Conditions for DNA-Encoded Library Synthesis
Authors: Ruff Yves , Martinez Roberto , Pellé Xavier , Nimsgern Pierre , Ratnikov Maxim , Berst Frederic
Published: June 2019

Herein, we describe the development of a practical catch-and release methodology utilizing a cationic, amphiphilic PEG-based polymer to perform chemical transformations on immobilized DNA conjugates under anhydrous conditions. We demonstrate the usefulness of our APTAC (amphiphilic polymer-facilitated transformations under anhydrous conditions) approach by performing several challenging transformations on DNA-conjugated small molecules in pure organic solvents: the addition of a carbanion equivalent to a DNA-conjugated ketone in tetrahydrofuran, the synthesis of saturated heterocycles using the tin (Sn) amine protocol (SnAP) in dichloromethane and the dual-catalytic (Ir/Ni) metallaphotoredox decarboxylative cross-coupling of carboxylic acids to DNA-conjugated aryl halides in DMSO. In addition, we demonstrate the feasibility of the latter in multititer-plate format.
Optical Spectra in the Condensed Phase: Capturing Anharmonic and Vibronic Features Using Dynamic and Static Approaches
Authors: Zuehlsdorff Tim , Montoya-Castillo Andres , Napoli Joseph Anthony , Markland Thomas E. , Isborn Christine
Published: June 2019

Simulating optical spectra in the condensed phase remains a challenge for theory due to the need to capture spectral signatures arising from anharmonicity and dynamical effects, such as vibronic progressions and their induced asymmetry. As such, numerous simulation methods have been developed that invoke different approximations and vary in their ability to capture different physical regimes. Here we use several models of chromophores in the condensed phase and ab initio molecular dynamics simulations to rigorously assess the applicability of methods to simulate optical absorption spectra. Specifically, we focus on the ensemble scheme, which can address anharmonic potential energy surfaces but relies on the applicability of extreme nuclear-electronic timescale separation; the Franck-Condon method, which includes dynamical effects but only at the harmonic level; as well as the recently introduced ensemble zero-temperature Franck-Condon approach, which straddles these limits. We also devote particular attention to the performance of methods derived from a cumulant expansion of the energy gap fluctuations and test the ability to approximate the requisite time correlation functions using classical dynamics with quantum correction factors. These results provide insights as to when these methods are applicable and able to capture the features of condensed phase spectra qualitatively and, in some cases, quantitatively across a range of regimes.
Relay Cross Metathesis for the Ascent of the Terpenoids
Authors: Bahou Karim , Braddock D. Christopher , Meyer Adam G. , Savage G. Paul , Shi Zhensheng
Published: June 2019

We report the design and implementation of a relay cross metathesis (ReXM) reaction for the ascent of the terpenoids in an iterative protocol using naturally occurring terpenoid building blocks. The method is used for the synthesis of a diterpene-benzoate macrolide of biogenetic relevance to the bromophycolide family of natural products.
A criatividade e as situações didáticas no ensino e aprendizagem da matemática
Authors: Gontijo Cleyton Hércules , Silva Erondina Barbosa da , Carvalho Rosália Policarpo Fagundes de
Published: June 2019

Este artigo propõe  uma articulação entre  a Perspectiva de Sistemas para o estudo da criatividade, de Csikszentmihalyi, e a Teoria das Situações Didáticas, no campo da matemática, de Brousseau. Consideramos que a articulação das duas  teorias possibilita o estudo  da criatividade no processo de ensino e aprendizagem da matemática, na medida em que nos permite compreender a ação dos sujeitos, nas situações de aprendizagem, considerando fatores contextuais. Csikszentmihalyi (1988, 1996,1999a, 1999b), no estudo  da criatividade, e Brousseau (1996a, 2008), no estudo  das situações didáticas, integram a ação do sujeito (trabalho do aluno), com o domínio (a situação didática na matemática) e o campo (ação do professor).
A pesquisa de intervenção psicopedagógica: evidências sobre ensinar e aprender
Authors: Neves Regina Da Silva Pina , Fávero Maria Helena
Published: June 2019

Adotamos a pesquisa de intervenção psicopedagógica de Fávero  (2001a, 2005a) focando os fracionários, os racionais e as competências mediacionais. Trabalhamos com  uma  estudante do  ensino   fundamental e  graduandos  em  matemática e pedagogia, em sessões de intervenção articulando: avaliação das  competências e dificuldades, planejamento e avaliação da natureza das mediações, ações e notações. A intervenção psicopedagógica engendrou a construção de conceitos e a tomada de consciência das práticas mediacionais. Discutimos sua pertinência na compreensão da mediação, da notação e implicações para  a matemática da educação básica  e avaliação; as Diretrizes Curriculares das licenciaturas em matemática e pedagogia; a pesquisa na formação de professores..
Aula de ciências em laboratório de informática: uma construção discursiva do monopólio participativo
Authors: Oliveira-Jayme Bruno De , Reis Giuliano , Eijck Michiel Van , Roth Wolf-Michael
Published: June 2019

No presente estudo, examinamos como a natureza das interações entre os membros de  um  grupo  de estudantes durante uma  atividade  escolar mediada pelo uso de computadores não só é influenciada pela disposição física dos componentes do grupo,  como também possibilita a ocorrência de monopolização. Utilizando uma perspectiva sociocultural  da  aprendizagem  em  conjunto   com  a  análise  do  discurso como ferramentas de análise e interpretação dos dados,  investigou-se as trocas verbais  e não verbais  entre  participantes um grupo de trabalho numa  sala de aula do ensino fundamental para discutir  as consequências negativas de tal dinâmica de grupo para  a coesão grupal  e o ensino e aprendizagem de ciências em tais ambientes escolares.
Gêneros Textuais e as Coleções de Livros Didáticos de Alfabetização Matemática e Matemática do Pnld 2010
Authors: Ripardo Ronaldo Barros
Published: June 2019

Neste artigo discuto como o conceito de gênero e tipo de texto foi utilizado no conjunto de ações do PNLD 2010 e quais os reflexos desse processo para os livros de Matemática e Alfabetização Matemática. Foram analisados documentos referentes a esse processo de seleção e dois livros didáticos de uma coleção aprovada. Serviu de base teórica a esta análise Marcuschi e Chartier. É possível perceber nas resenhas que compõem o Guia distorções quanto à noção de gênero e tipo de texto. Quanto aos livros, pouco apresentam atividades que explorem o texto em seus aspectos constitutivos gerais, além de as atividades propostas pouca relação terem com os conteúdos matemáticos presentes nos textos.
A crise socioambiental e a atuação de ONGs ambientalistas no campo educacional
Authors: Rodrigues Jéssica Do Nascimento , Loureiro Carlos Frederico Bernardo
Published: June 2019

Sob a perspectiva de “fim da história” e naturalização do modo de produção capitalista, a crise socioambiental é incorporada ao discurso de mercado, tornando- se estratégica para a manutenção do capitalismo. Essa “arte do contornamento”, com “roupagem verde”, conserva as relações de exploração do trabalhador e da natureza. Não obstante, surgem mecanismos de luta, entre eles a educação ambiental, vista pelo prisma crítico-transformador. De outra parte, instituições de assessoramento aos movimentos sociais, como as ONGs, invadem o campo educacional, sob o pretexto de fazer aquilo que o Estado não faz e reforçando uma lógica de Estado Gerencial. Objetiva-se, assim, evidenciar tais questões e a urgência da pesquisa acerca desse debate para a educação ambiental.
Apresentação
Authors: Sousa Carlos Alberto Lopes de , Rêses Erlando Da Silva
Published: June 2019

A proposta de organização de um dossiê sobre o pensamento de Paulo Freire surgiu em função da Semana Universitária da Universidade de Brasília (UnB) de 2011 – 90 anos de Paulo Freire: um marco para a reflexão sobre os rumos da universidade Brasileira, organizada pelo Decanato de Extensão (DEX), em parceria com institutos, faculdades e departamentos da UnB e instituições governamentais e não governamentais para a apresentação, socialização e discussão de atividades de ensino, pesquisa e extensão.
As fichas de cultura do Sistema de Alfabetização Paulo Freire: um “Ovo de Colombo”
Authors: Fávero Osmar
Published: June 2019

O artigo retoma, inicialmente, as elaborações teóricas sobre cultura e cultura popular que fundamentaram a criação dos centros e movimentos de cultura e educação popular no Brasil nos anos de 1960. Apresenta, a seguir, o conceito antropológico de cultura assumido por Paulo Freire no Sistema de Alfabetização de Adultos, cuja primeira experiência foi realizada em Angicos, no Estado do Rio Grande do Norte, em 1963. Analisa o caráter inovador das fichas de cultura, motivadoras do processo de alfabetização. Reproduz e comenta as imagens artísticas dessas fichas, imagens feitas por Francisco Brennand para o Programa Nacional de Alfabetização, que seria implantado em todo o país, mas que foi bruscamente interrompido pelo golpe militar de 31 de março de 1964.
Presença e pegadas de Paulo Freire no Distrito Federal: uma primeira aproximação
Authors: Rêses Erlando Da Silva , Vieira Maria Clarisse , Reis Renato Hilário dos
Published: June 2019

O artigo analisa a presença e as pegadas de Paulo Freire no Distrito Federal. Por meio de pesquisa histórica e da análise documental, o texto busca os registros e os indícios documentais que evidenciam a atuação e a influência desse educador no DF. O artigo está organizado de forma cronológica e analisa, sobretudo, três diferentes momentos, nos quais o educador esteve no Distrito Federal: o início dos anos 1960 e as décadas de 1980 e 1990. Destaca-se ainda, brevemente, a atualidade da influência do seu pensamento. Ao mesmo tempo em que investiga as “pegadas” do educador, o texto mostra como as concepções de Paulo Freire foram incorporando-se à prática educativa e à formação de educadores, alimentando sonhos e projetos de construção de uma sociedade democrática.
Sociedade civil – a caixa preta dos movimentos sociais: para entender a relação entre empresa e escola pública
Authors: Pessoa Jadir De Morais , Cruz José Adelson Da
Published: June 2019

Nosso objetivo é buscar apanhar os nexos e tensões que fazem governos, empresários e educadores se articularem em torno da tese de que é urgente e necessário mobilizar a “sociedade civil” para participar ativamente da “salvação” da escola pública. Por fim, apontar que esta mobilização e os programas de governos ocultam práticas que aprofundam a exclusão social, por desmontarem referências e conteúdos dos direitos sociais.
Professoras de biologia: história de vida, formação e contexto educacional brasileiro (1960-2010)
Authors: Longhini Iara Mora
Published: June 2019

Este texto é resultado de uma pesquisa em que procuramos relacionar a formação de professoras de biologia de diferentes regiões do Brasil ao contexto educacional do país no período de 1960 a 2010, a partir de suas histórias de vida. Para tanto, este trabalho tem por base a descrição interpretativa e se utiliza da história de vida como procedimento investigativo, no campo das pesquisas qualitativas na área da educação. Os resultados revelam a estreita relação existente entre o contexto sócio-político-educacional e a formação docente, uma vez que é aquele que norteia as políticas de formação do profissional docente.
STATUS GIZI DAN AKTIVITAS FISIK DENGAN STATUS HIDRASI PADA REMAJA DI SMA NEGERI 5 KOTA JAMBI
Authors: Merita Merita , Aisah Aisah , Aulia Siti
Published: June 2019

Latar Belakang: Hidrasi adalah kondisi dimana orang sehat yang menjaga keseimbangan air. Sekitar 46,1% remaja di indonesia mengalami dehidrasi ringan. Penelitian ini bertujuan untuk mengetahui hubungan status gizi dan aktivitas fisik dengan status hidrasi di SMA Negeri 5 Kota Jambi.                        Metode: Jenis penelitian ini adalah kuantitatif dengan desain studi cross sectional. Sampel penelitian ini berjumlah 90 responden. Analisis data dalam penelitian ini terdiri dari univariat dan bivariat (spearman correlation test).Hasil: Hasil penelitian ini menunjukkan bahwa 56,7% siswa berstatus gizi normal, 47,8% siswa melakukan aktivitas fisik sedang, 57,8% siswa terhidrasi. Berdasarkan analisis bivariat diketahui terdapat hubungan yang signifikan antara status gizi dengan status hidrasi pada remaja (p value= 0,026), tidak terdapat hubungan yang signifikan antara aktivitas fisik  dengan status hidrasi pada remaja (p value= 0,208).Kesimpulan:Terdapat hubungan yang signifikan antara status gizi dengan status hidrasi dan tidak terdapat hubungan antara aktivitas fisik dengan status hidrasi pada remaja. Disarankan kepada semua siswa untuk memantau berat badan dan melakukan aktivitas fisik secara rutin disertai konsumsi air minum minimal 8 gelas per hari.
EXPLORING MOTHER'S HEALTHY FEEDING PRACTICES OF CHILDREN, AGES 4-6 YEARS: A QUALITATIVE STUDY
Authors: Rahmiwati Anita
Published: June 2019

Feeding or eating good upbringing which affects the development growth  and intelligence of children. For that it is necessary feeding patterns or parenting eat right and balanced in order to stay healthy and avoid infection or other diseases related to nutrition. A balanced diet is eating according to composition of food that our body needs in portions adapted to needs of children at each age. Respondents in this study are the parents of kindergarten children Rabbani North Indaralaya with range of aged 4-6 years. Implementation of FGD was attended by 12 people, consisting; three researchers, two minutes, and seven respondents. Respondents selected through purposive sampling, based on predetermined criteria and is considered capable of answering research problems. The purpose of study is to explore more deeply about parenting feeding mothers in Ogan Ilir associated with understanding (the concept of balanced nutrition, quantity of feeding practices in terms, frequency, form, variety and type of food). This study used a qualitative approach. The data collection technique are Focus Group Discussion. Data processing was done manually using content analysis method (analysis). The results showed majority of mothers do not understand that concept of balanced nutrition, for this aspect the number of feeding infants in Ogan Ilir still do not meet the nutritional needs to children as seen from the children often do not prepared  food to consume by their mother if the child does not like the dishes being served. From the aspect of the frequency almost mothers only give meal 2-3 times and 1 times a additional food during the day. From this aspect of mother form has given the same food with family to meal but this menu give only food in like a child. In terms of variety of food provided to children are still less and almost children do not consume vegetables and fruit. Mother feeding patterns in children is not good, lack of parental support in providing food resulted in children accustomed to eating that is not good. Appropriate educational media is required age of children to increase the child's knowledge about nutritious food and motivate children to want to eat nutritious food.
Cпособи хірургічного лікування синдрому Mirizzi
Authors: Rusyn V. I. , Rumiantsev K. E. , Pavuk F. M.
Published: June 2019

Мета. Визначення способу хірургічного лікування спонтанних внутрішніх біліарних нориць (СВБН) при синдромі Mirizzi (СМ).

Матеріали і методи. Ретроспективно проаналізовано результати лікування 8000 пацієнтів із жовчнокам’яною хворобою в Закарпатській обласній клінічній лікарні імені Андрія Новака з 1997 по 2017 р. У 192 із цих пацієнтів спостерігали СВБН. Отже, частота виявлення СВБН становила 2,4%.

Результати. При СМ І типу виконували холецистектомію із зашиванням широкої і короткої міхурової протоки, ІІ типу - холецистектомію «від дна» з висіченням норицевого ходу і зашиванням дефекту у загальній жовчній протоці (ЗЖП) на Т-подібній трубці, ІІІ типу - холецистектомію з пластикою ЗЖП залишками стінки жовчного міхура і зовнішнім дренуванням Т-подібною трубкою, IV типу - холецистектомію «від дна» із повним пересіченням ЗЖП. У 19 хворих із холедоходуоденальними норицями при СМ І типу виконали ендоскопічну папілофістулотомію із метою надійного дренування ЗЖП, евакуції конкрементів із неї і ліквідації внутрішнього отвору нориці.

Висновки. Метою операції при СВБН є видалення жовчного міхура, забезпечення відтоку жовчі у просвіт травного каналу і пасажу хімусу по ньому. Якщо норицю у порожнистому органі, виконують її висічення з ушиванням отвору, в окремих спостереженнях застосовують резекційні способи ліквідації нориць.
Клініко-морфологічна характеристика папілярних карцином щитоподібної залози у пацієнтів, народжених до та після аварії на Чорнобильській АЕС
Authors: Guda B. B. , Kovalenko A. E.
Published: June 2019

Мета. Вивчити частоту папілярних карцином щитоподібної залози з різними характеристиками в залежності від віку пацієнтів з урахуванням дати їх народження - до та після аварії на Чорнобильській АЕС.

Матеріали і методи. Проведено ретроспективне дослідження щодо 4956 пацієнтів, оперованих з приводу папілярної карциноми щитоподібної залози в 1995 - 2014 рр.

Результати. Найчастіше пухлини розміром 21 - 40 мм, категорії N1ab і М1, з інвазією в капсулу пухлини, інтра- чи екстратиреоїдною інвазією спостерігали у пацієнтів у віці до 18 років у порівнянні з дорослими пацієнтами, незважаючи на дату їх народження. У дітей та підлітків, народжених після аварії, рідше, ніж у дітей та підлітків, народжених до аварії, реєстрували мультифокальні карциноми та карциноми категорії N1ab.

Висновки. Папілярні карциноми у дітей та підлітків, які народилися до та після аварії на Чорнобильській АЕС, є агресивнішими за папілярні карциноми у дорослих пацієнтів, проте за своїми клінічними характеристиками вони не відрізняються між собою, за винятком меншої частоти мультифокальних карцином і карцином категорії N1ab.
Застосування дифузійно-зважених зображень магнітно-резонансної томографії для прогнозування перебігу хронічної хвороби нирок у хворих з нирково-клітинним раком після резекції нирки
Authors: Pasichnyk S. M. , Stakhovsky E. O. , Borys Yu. B. , Mytsyk Yu. O. , Dutka I. Yu. , Komnatska I. M.
Published: June 2019

Мета. Вивчити можливість застосування дифузійно-зважених зображень магнітно-резонансної томографії (МРТ) для прогнозування розвитку хронічної хвороби нирок (ХХН) у хворих із нирково-клітинним раком (НКР) після резекції нирки.

Матеріали і методи. У дослідженні взяли участь 44 пацієнти, яких розподілили на дві групи: 1-шу (основну) склали 24 хворих, у яких вперше діагностували НКР стадій Т1аN0M0G1-G3, та 2-гу (контрольну) - 20 пацієнтів без ознак НКР та порушення анатомо-функціонального стану нирок.

Результати. Зниження вимірюваного коефіцієнта дифузії (ВКД) інтактної ділянки кори ураженої пухлиною нирки на дифузійно-зважених зображеннях МРТ у порівнянні із значеннями ВКД нормальної ниркової кори слугувало прогностичним маркером зниження швидкості клубочкової фільтрації на іпсилатеральній стороні, що можна розглядати як передумову розвитку ХХН.Висновки. Обчислення ВКД на дифузійно-зважених зображеннях МРТ дає можливість прогнозувати зниження функціональної здатності ураженої пухлиною нирки у хворих з НКР стадії T1а після її резекції, що є важливим для метафілактики розвитку ХХН у даної категорії хворих.
The first record of the mole crab (Albunea carabus L. 1758, Decapoda, Anomura, Hippidea) in the Gulf of Antalya
Authors: Gökoğlu Mehmet , Teker Serkan , Gökoğlu Kemal
Published: June 2019

The first occurence of the mole crab (Albunea carabus L. 1758) in the Gulf of Antalya. During a commercial shrimp fishery oparation in May, 2016, A different type of crab was caught in the Gulf of Antalya, Bogazkent (Köprüçayı). This unknown sample was brought to Akdeniz Üniversity Fisheries Laboratory and It was stored. Sample was caught with shrimp nets that were left at depths of 10-20 m in the Gulf of Antalya, Bogazkent (Köprüçay River). It has been determined that this elongated mole, caught in the identification of the species, is Albunea carabus L. 1758, known as the dengue. Mole crab (Albunea carabus L. 1758) was reported for the first time from the Gulf of Antalya via this article.Keywords: Albunea carabus; the Gulf of Antalya; mole crab
ESTIMASI UKURAN OPTIMAL EKSPLOITASI BEBERAPA JENIS IKAN DI WADUK JATILUHUR, JAWA BARAT
Authors: Warsa Andri
Published: June 2019

Waduk Ir. H. Djuanda atau yang lebih dikenal dengan Waduk Jatiluhur mempunyai keanekaragaman jenis ikan yang tinggi. Namun saat ini mengalami penurunan produksi ikan yang diakibatkan oleh degradasi lingkungan, keberadaan spesies asing invasif dan aktivitas penangkapan. Alat tangkap yang banyak digunakan oleh nelayan adalah jaring insang. Jaring insang merupakan alat tangkap selektif yang mampu menangkap ikan pada ukuran tertentu berdasarkan ukuran mata jaring. Penelitian ini bertujuan untuk mengetahui ukuran optimal untuk eksploitasi beberapa jenis ikan dalam rangka pengelolaan sumberdaya ikan di Waduk Jatiluhur. Pengumpulan data sekunder dilakukan melalui penelusuran pustaka dan instansi terkait. Data primer diperoleh dari penelitian dengan percobaan penangkapan menggunakan jaring insang dengan ukuran mata jaring 1,0; 1,5; 2,0; 2,5; 3,0; 3,5 dan 4,0 inci serta wawancara dengan nelayan. Pemasangan jaring insang dilakukan di enam stasiun yaitu Muara Sungai Cihuni-Cibadak, Sungai Cikanyayan, Sungai Cirirp, Cihonje, Pasir Kole dan Cilalawi. Hasil penelitian menunjukkan bahwa ukuran optimal untuk eksploitasi ikan hampal, lalawak, nila, nilem dan tawes masing-masing adalah 25,5; 17,0; 21,5; 16,5 dan 25,0 cm dengan menggunakan jaring insang dengan ukuran mata jaring ≥ 3 inci.Kata kunci: Waduk Jatiluhur, jenis ikan, panjang total, jaring insang.
Fish species composition and size structure exploited by gill net fishery in The New Calabar River, Nigeria
Authors: Olopade Olaniyi Alaba , Dienye Henry Eyina , Oderhohwo Ogheneforon
Published: June 2019

The purpose of this study was to investigate the species composition and size selectivity of gillnets commonly used by the artisanal fishers in the New Calabar River, Rivers State, Nigeria. The data was collected during February-July 2018 from 3 sampling stations: SI Choba, S2 Ogbogoro, and S3 Iwofe all along the stretch of the river. Twenty-eight fish species were found belonging to 15 families. The prevalent families were Cichlidae, Mugilidae and Clupeidae representing 32.22%, 30.36% and 10.23% of the total catch, respectively. The most dominant species in terms of number were Liza falcipinnis (12.58%) and Mugil cephalous (12.26%) while in terms of biomass, the most abundance species were Xenomystus nigri (24.12%) and Lutjanus agennes (12.50 %). The girth and total lengths of the fishes ranged from 5.20±0.20 to 21.00±0.00 cm and 8.85±0.15 to 28.19±1.13 cm respectively. The length at first capture (L50%) for the most abundant species (Liza falcipinnis) was calculated to be 14.13 cm while that of L25% and L75% were 12.70cm and 15.25cm respectively. It was concluded that the gill nets used in the New Calabar River exploit fish species of small sizes and few medium sized specimens relative to species potential maximum size. It is therefore recommended that for an improved and sustainable exploitation fish stock of the New Calabar River, the use of gillnets of less than 25 mm-mesh sizes and “other gears” should be prohibited.Keywords: gill nets; species composition; mesh size; selectivity; New Calabar River
PENGEMBANGAN MEDIA EVALUASI PENDIDIKAN “SI ASSEB” DI SMA NEGERI 1 MATANGKULI ACEH UTARA
Authors: Qusthalani Qusthalani
Published: June 2019

Evaluasi pendidikan itu wajib dilaksanakan oleh  guru  sebagai  penanggung  jawab  dalam  proses  pembelajaran  siswa. evaluasi tersebut dapat dilakukan dengan jalan memberikan tes yang diadakan  setiap selesai satu bab pembelajaran atau biasa disebut dengan ulangan harian, ujian tengah  semester atau ujian akhir semester. Beberapa peneliti telah membuat software untuk mempermudah guru dalam menganalisis hasil jawaban siswa, Namun, software yang dibuat tersebut hanya menyajikan hasil belajar siswa dalam bentuk benar dan salah saja. Soal-soal yang telah dibuat tersebut tidak dapat melihat sejauhmana siswa tersebut tersebut sudah memahami suatu materi dari soal yang diuji, sehingga software yang akan penulis buat soal pilihan ganda dua tingkat. Soal tersebut tidak hanya melihat benar dan salah dari jawaban siswa, tetapi dapat juga menganalisis tingkat pemahaman siswa dari suatu konsep dalam soal yang diuji tersebut. Sistem  asesmen  ini  akan  berbasis  web  sehingga  nama  sistem  yang dikembangkan adalah Si Asseb (Aplikasi Assesment Berbasis WEB).
PENGGUNAAN DHT11 DAN ARDUINO UNO SEBAGAI PENDETEKSI SUHU PADA LAPTOP
Authors: Hardianti Dinda , Rizki Mutia , Yanti Fajri
Published: June 2019

Laptop merupakan salah satu perangkat elektronik atau komputer yang membantu pekerjaan manusia yang  sangat sering digunakan. Penggunaan laptop yang terlalu berlebihan dapat menyebabkan laptop menjadi panas/overheat. Jika dibiarkan akan menimbulkan masalah pada laptop. Overheating merupakan salah satu  penyebab utama kerusakan hard drive. Kerusakan ini dapat dicegah dengan menggunakan software sensor suhu, salah satunya adalah DHT11 dan Aduino Uno. DHT11 adalah salah satu sensor yang digunakan untuk mengukur suhu dan kelembaman (humidity). Sedangkan Aduino  Uno adalah kit atau papan rangkaian elektronik yang di dalamnya terdapat komponen utama yaitu sebuah chip mikrokontroler. Mikrokontroler pada arduino dapat di program menggunakan komputer sesuai kebutuhan. Tujuan dari penelitian ini adalah untuk membuat alat pendeteksi suhu pada laptop dengan menggunakan sensor DHT11 sebagai sensor suhu pada laptop yang diteliti, mikrokontroler ATMega328P sebagai pemrosesan data dan memanfaatkan teknologi kode pemrogram sebagai sarana informasi secara cepat dan akurat. Penggunaan Arduino uno sebagai sistem pengendali pada alat pendeteksi dengan menggunakan kode pemrogram dan sebagai hasil output yang dikeluarkan pada laptop. Metode penelitian yang digunakan dalam penelitian ini adalah metode Research and Development dengan model prototype. Berdasarkan penelitian yang telah dilakukan pada berbagai merek laptop, hasil menunjukkan bahwa suhu ketiga merek laptop masih dalam keadaan baik dan ideal. Secara umum hasil penelitian dapat disimpulkan bahwa: 1) Alat pendeteksi suhu yang dirancang dapat mengukur suhu pada laptop secara terus menerus, 2) Sistem dapat memberikan informasi suhu pada laptop kepada pengguna secara tepat dan akurat. 3) Alat pendeteksi dapat mendeteksi suhu dan melihat suhu ideal, suhu normal dan suhu yang tidak stabil.
PENGUJIAN DAN ANALISIS UMUR PAKAI LAMPU	LIGHT EMITTING DIODE (LED) SWABALAST UNTUK PENCAHAYAAN UMUM
Authors: Palaloi Sudirman
Published: June 2019

Penelitian ini bertujuan untuk mengetahui umur pakai lampu LED swabalast yang saat ini banyak digunakan untuk penerangan umum. Jumlah sampel yang diuji sebanyak 59 unit dengan daya 2 s.d 13 watt dari berbagai merek. Metode pengujian mengacu pada standar SNI IEC 62612:2013. Kuat cahaya awal diukur sebagai titik data pertama dalam menentukan umur pakai lampu. Umur pakai lampu LED  ditentukan dengan cara menyalahkan lampu selama 6000 jam dengan pengukuran  kuat cahaya setiap 1000 jam. Hasil pengukuran kuat cahaya selama 6000 jam dibuat grafik hubungan antara kuat cahaya terhadap umur lampu. Lampu yang memiliki penurunan kuat cahaya maksimum 10% setelah menyala 6000 jam dimasukkan dalam kategori A.  Penurunan kuat cahaya hingga 20% masuk kategori B, dan seterusnya lampu yang kuat cahayanya menurun hingga 50% dimasukkan dalam katerogori E. Hasil pengujian menunjukkan bahwa ada sekitar 25,4% masuk ke dalam kategori A, sebanyak 40,7% masuk kategori B. Sedangkan kategori C dan D masing-masing  sebanyak 24,7% dan 6,8%. Terdapat  3,4% lampu tidak masuk dalam kategori karena pada saat pengujian 6000 jam, prosentasi kuat cahaya di bawah 50%. Hasil ekstrapolasi secara statistik didapatkan umur pakai lampu tersebut rata-rata pada kisaran  20.500 jam. Kata kunci: lampu LED, kuat cahaya, efikasi, umur pakai
ANALISA TERMOHIDROLIKA KERUSAKAN KONDENSOR ORTHO DICHLOROBENZENE TIPE SHELL DAN TUBE
Authors: Teguh P. Bambang , Komara Riki Jaka
Published: June 2019

Telah terjadi kerusakan pada sejumlah tube pada kondensor Ortho Dichlorobenzene (ODCB). Kondensor ODCB adalah jenis shell and tube tipe BEM, posisi vertikal, dengan expansion joint pada shell. ODCB mengalir di sisi tube dan air pendingin (CW) mengalir di sisi shell secara paralel dari atas ke bawah. Hasil uji material menyimpulkan bahwa kerusakan berupa Stress Corrosion Cracking (SCC) yang disebabkan oleh tegangan bengkok akibat ekspansi tube yang tertahan. Namun demikian, ternyata retakan tube terjadi tidak pada tengah-tengah bentangan panjang tube melainkan pada jarak sekitar 450 – 500 mm dari tube sheet, tidak jauh dari shell inlet nozlle. Tujuan studi ini adalah untuk mempelajari fenomena termohidrolika lokal yang menyebabkan kerusakan tube. Hasil simulasi menunjukkan pada jarak sekitar 450 – 500 mm dari tube sheet, CW di sisi shell mulai mendidih dan ODCB di sisi tube mulai terkondensasi. Uap air yang terbentuk mengisi ruang shell bagian atas. Proses pendinginan di zona ini menjadi sangat buruk dan mengakibatkan gradien temperatur dinding tube ke arah longitudinal cukup tinggi. Gradien temperatur yang tinggi menyebabkan kekuatan dinding tube menurun, sehingga saat ekspansi tube tertahan, tube akan bengkok pada zona tersebut.Kata kunci: Ortho Dichlorobenzene, kondesor, shell and tube, BEM, aliran paralel, SS 316 L, stress corrosion cracking, tube bengkok, kondensasi, pendidihan
KINERJA MESIN DIESEL MENGGUNAKAN BAHAN BAKAR SOLAR, DME DAN CAMPURANNYA DENGAN SIMULASI DINAMIKA FLUIDA
Authors: Yuwono Taufik , Rahardjo Bambang Suwondo
Published: June 2019

Fuel atomization plays a main role in determining the performance of dieselengines, where the spray pattern illustrates fuel combustion occurs in thecombustion chamber. From fuel spray test results showed that fuel evaporationcharacteristics of fuel at a certain pressure will effect on engine performance.The higher the injection pressure will reduce the diameter of the fuel sprays(sauter mean diameter), thus speeding up evaporation and mixing processesbetween fuel and air in the combustion chamber with resulted the combustionprocess is more completely. Analysis of fuel atomization simulations performedat injection pressure 150, 180 and 235 bar on the distribution of size,temperature and concentration of air+fuel mixture. Physical chemical parametersresulting are the size and temperature distribution patterns fuel+air mixturesprays. DME is feasible to be used as alternative fuel in diesel engines by adding2–5% lubricant additives. The use of diesel+DME 50/50 mixed fuel provides thelowest fuel consumption by generating power of 3x2,975 watts.Kata kunci: kinerja mesin, solar, DME, simulasi atomisasi, dinamika fluida
REKONDISI KINERJA OPERASI FIXED BED GASIFIER SEKAM PADI PT. NATIONAL CHAMPIGNON
Authors: Rahardjo Bambang Suwondo
Published: June 2019

All this time, PT Natcham’s gasifier only be used for synthetic gas production asfuel of 400 kW gas engine power generation for the mushroom industry’selectricity needs while energy crisis. From now on, the application anddevelopment of biomass gasification technology is focused on synthetic gasproduction to be processed furthermore from gas to liquid (GTL) throughFischer–Tropsch synthesis process. H2+CO contained in syngas product is low(average 20% of total producer gas) with H2/CO ratio = 0.30–0,35. Producedsynthetic gas composition more and less equal to the design maker of Peako –China that is feasible to be utilized as fuel for 400 kW gas engine powergeneration, but not meet yet specification requirements of syngas composition asgas feeding for Fischer–Tropsch synthesis process (Gas–To–Liquid, GTL).Installation of O2 and steam injection system inside gasifier necessary to improvesyngas quality, all at once N2 content decreasing in the syngas, with the result ofH2/CO ratio >1 that will improve liquid product.Kata kunci: fixed–bed gasifier, gasification, rice husk, synthetic gas
KARAKTERISTIK PROSES HIDROKONVERSI KATALITIK DENGAN BAHAN BAKU BITUMEN
Authors: Yusnitati Yusnitati , Hanif Muhammad , Adiarso Adiarso
Published: June 2019

The effects of bitumen types in a hydro-conversion catalytic process to producesyntethic liquid fuels was investigated. Three samples of natural solid bitumenobtained from three different sampling points in Riau Province are used in thisstudy. Preliminary technical feasibility of the natural solid bitumen as a feedstockof synthetic fuel oil using this process is also investigated. Experimental runs arecarried out using a 1 liter stirred batch autoclave reactor under the standardconditions: reaction temperature of 450oC, initial hydrogen pressure of 12 MPafor 1 hour and atomic ratio of sulfur to iron at 2.0. This process condition issimilar to direct coal liquefaction process using heavy oil solvent produced fromBench Scale Unit (BSU) 100 kg/hour input in Takasago, Japan. The resultsindicate that the oil yield increases with the decrease of liquid bottom yield. TotalCO+CO2 and hydrocarbon gases products are almost equal at all bitumensamples. Due to their high ash content, the oil yield (LO, MO and HO) of bitumensamples relatively lower than the oil yield of coal liquefaction process. It was alsofound that O/C and H/C atomic ratio in bitumen samples vary significantly withtheir sampling point, but the H/C ratio of bitumen relatively higher than typicalcoal. The higher of H/C ratio, the easier of bitumen to be converted to syntheticfuel oil and leading to the more efficiently use of gaseous hydrogen. Inconclusion, the natural solid bitumen has a possibility as a feedstock of syntheticfuel oil, if it is fed to the process in the form of a dried-ash-free-bitumen (hyperbitumen).Kata kunci: bitumen, hidrokonversi katalitik, BBM sintetis
TECHNICAL ASSESSMENT OF UBC PILOT PLANT USING COMPUTER PROCESS SIMULATION
Authors: Hanif Muhammad , Sugeng Dhani Avianto , Cruyff Johan
Published: June 2019

Indonesia memiliki sumber daya batubara peringkat rendah dalam jumlah yangberlimpah (± 38 juta ton).Jenis batubara tersebut belum sepenuhnya dikajimeskipun diketahui memiliki berbagai kelebihan seperti kadar abu dan sulphurrendah. Teknologi UBC didedikasikan untuk memproduksi batubara yangdengan nilai jual yang tinggi dan mampu meningkatkan pemanfaatan batubaraperingkat rendah di Indonesia. Tulisan ini membahas evaluasi proses UpgradedBrown Coal (UBC) dengan menggunakan data pengoperasian pilot plant UBC diPalimanan. Lingkup kegiatan ini juga merupakan lingkup tanggungjawab BPPTdalam kerjasaa Jepang dengan Indonesia di bidang pengembangan teknologiUBC.Keywords: batubara peringkat rendah, upgraded brown coal (UBC), pilot plant
GASIFIKASI SEKAM PADI (BIONER-1)
Authors: Sjaffriadi Sjaffriadi , Nurachman Budi
Published: June 2019

Indonesia has potential abudant biomass wastes. Annual paddy production in Indonesia is approximately 50 million tons, from which 14 tons of rice husks is produced, assuming that each ton paddy could produce 0.28 tons of rice husks. At its calorific value of 12.5 MJ/kg, the annual potential energy provided by these husks is around 175 GJ. A gasification system using rice husk would normally require 1.5 to 2 kg of rice husks to generate 1 kWh of electricity. Therefore, each ton of rice milled could produce wastes that equals to electricity generation of 150 kWh. Rice husk is about 14 to 28.5% of a rice grain, but mostly has an average value of 25%. A gasification Bioner-1 system is operated 14 hours per day in 366 days per year. This system will drive a rice milling unit for 8 hours per day and produce electricity for villagers for another 6 hours in the evening. At a fuel consumption of 25 kg per hour, the system will require 130 tons of husks that will be provided from rice fields of around 175 ha. Gas (syngas) produced from the gasification will be used for a dual fuel diesel engine system, supplementing diesel fuel. The diesel fuel substituted by the gas could reach about 75-80%. At a consumption rate of 25 kg/hour rice husks in the system, the husks consumption per kWh electricity is 1.5 kg (1.5 kg/kWh) and the efficiency of rice husks conversion is 15%. A small portion of tar could still escape from a gas cleaning system. The tar could be observed during overhoul of the diesel engine. The tar entering into the diesel engine is overcome through switching on the diesel engine for about 10 minutes and flushing using diesel oil right before it is shutted down. Through this method, the tar entering the diesel engine is completely burned. Kata kunci gasification, biomas, rice husk, diesel engine
KONSEP DESAIN ALAT UJI KINERJA SERVO-VALVE = DESIGN CONCEPT OF TESTING MACHINE OF SERVO-VALVE PERFORMANCES
Authors: Zaenal Harris
Published: June 2019

Design concept of performance test equipment for servo-valve consists of mechanical and electronic systems. The mechanical parts includes a hydraulic power pack equipped with safety and monitoring of pressure and flow-rate, servo-valve and its base-plate, flow-meter for monitoring flow-rate in A and B ports. The electronic system parts includes a signal generator to the servo- valve, output signal from flow meter A and B ports, acquisition for signal output flow-meter, hardware and software computer. The form of graph Input Signal (m- Ampere) versus Output Signal (LPM) can help analyze to determine servo-valve performance, that are accuracy and detect damage which can be taken for further maintenance and repair.Keywords : servo-valve, signal input, flow rate output , performance test machine.Abstrak Konsep desain alat uji kinerja servo-valve terdiri atas konsep desain mekanis dan konsep desain elektronik. Konsep desain mekanis meliputi hydraulic power pack yang dilengkapi pengaman dan monitor tekanan dan flow- rate, servo-valve dan base-plate-nya, flow-meter untuk monitor flow-rate di port A dan B. Konsep desain elektronik meliputi pembangkit signal input kepada servo-valve, signal output dari flow-meter A dan B, akuisisi signal output flow- meter, hardware dan software komputer. Grafik Signal Input (m-Ampere) versus Signal Output (LPM) dapat membantu analisa untuk mengetahui kinerja servo-valve antara lain keakurasian, mendeteksi kerusakan servo-valve untuk selanjutnya dapat diambil tindakan pemeliharaan dan perbaikan.Kata Kunci : servo-valve, input signal, output flow rate ,alat uji kinerja.