bluuebunny/crossref_metadata_2025 huggingface dataset:
Doença de Lyme - uma revisão abrangente sobre a etiologia, epidemiologia, manifestações clínicas, estágios da doença, diagnóstico e tratamento
Authors: Da Cunha Débora Dornelas , Carneiro Amanda Dolores Gonçalves , Galvão Letícia Campos , Leite Miguel Carvalho , Fusinato Paula Tormen
Published: February 2024

A doença de Lyme é provocada pela bactéria Borrelia burgdorferi e, geralmente, é transmitida através da picada de carrapatos do tipo Ixodes. Essa transmissão ocorre quando o carrapato infectado se agarra à pele humana por um tempo prolongado. Em relação à sua ocorrência, essa doença é mais comum em áreas específicas, como as regiões temperadas da América do Norte, Europa e Ásia. Do ponto de vista clínico, a doença de Lyme apresenta diferentes estágios de manifestação. Inicialmente, no estágio localizado, é comum observar o eritema migrans, uma mancha vermelha com um centro mais claro, além de sintomas como febre, cansaço e dores musculares. À medida que avança para o estágio disseminado, outros sistemas do corpo podem ser afetados, levando a complicações como meningite, paralisia facial e inflamações nas articulações. Caso não seja tratada adequadamente, a doença pode evoluir para um estágio mais crônico, que se manifesta através de sintomas persistentes como artrite e problemas neurológicos. Quanto ao diagnóstico, é essencial considerar tanto os sintomas clínicos quanto os antecedentes de exposição a carrapatos. Para confirmar a infecção, são realizados testes laboratoriais específicos. No que se refere ao tratamento, a abordagem varia conforme o estágio da doença. Para os estágios iniciais, a doxiciclina é frequentemente prescrita, tanto para adultos quanto para crianças. Em situações mais avançadas, podem ser necessários tratamentos mais prolongados ou combinações de antibióticos, dependendo da gravidade e das manifestações clínicas apresentadas. Por fim, entender a origem, o comportamento e as características da doença de Lyme é fundamental. Isso não só permite um tratamento mais eficaz, mas também destaca a importância da prevenção, conscientização pública e pesquisa contínua para lidar com os desafios associados a essa condição.
Isquemia mesentérica aguda - etiologia esquecida de abdome agudo cirúrgico
Authors: Carneiro Carlos André dos Santos , Amorim Juliana Carollyne , Souza Maria Eliza Drumond , Mattar Maria Isabel Cardoso , Silva Leonardo Oliveira
Published: February 2024

A Isquemia Mesentérica Aguda (IMA) é uma condição rara e potencialmente grave que resulta na súbita falta de irrigação sanguínea para o intestino delgado, causando dor abdominal intensa e podendo levar a complicações sérias, como peritonite e sepse. A etiologia da IMA varia, com embolia arterial mesentérica, trombose arterial mesentérica, isquemia mesentérica não oclusiva e trombose venosa mesentérica sendo causas comuns. A prevalência aumenta com a idade, principalmente acima da sétima década, e a incidência varia entre diferentes regiões. Outrossim, o diagnóstico precoce é desafiador - devido à natureza inespecífica dos sintomas e à baixa incidência da doença - e é frequentemente alcançado por meio de tomografia computadorizada com contraste, auxiliada por uma suspeita clínica robusta. Os sintomas podem variar dependendo da etiologia, destacando-se a dor abdominal como sintoma comum. O exame físico geralmente é pouco específico, e a abordagem diagnóstica deve incluir avaliação laboratorial, como biomarcadores específicos. Ademais, o tratamento da IMA depende da etiologia e condição do paciente. Opções incluem revascularização mesentérica, ressecção intestinal e intervenções endovasculares. Estudos recentes sugerem que abordagens endovasculares podem ter resultados mais favoráveis em comparação com intervenções cirúrgicas abertas, com menor mortalidade e necessidade de ressecção intestinal. Nesse sentido, a escolha da terapia deve considerar fatores como estabilidade hemodinâmica, presença de sinais de peritonite e a extensão do comprometimento intestinal. A sobrevida em 5 anos após o tratamento endovascular foi relatada como superior em comparação com a cirurgia vascular aberta. Diferentes técnicas de restauração do fluxo sanguíneo são aplicadas com base na etiologia da IMA, destacando-se a embolectomia, angioplastia e procedimentos de bypass.
Linfoma linfocítico de pequenas células como diagnóstico diferencial de dor abdominal - um relato de caso
Authors: Rodrigues Larisse de Fátima , Paiva Lígia , Gontijo Flávia Dorneles Clemente , Silva Ana Laura Soares , Da Silva Danielli Regina , Calil Meire Cristina Furlan Rodrigues
Published: February 2024

A Leucemia Linfocítica Crônica (LLC) representa o principal tipo de leucemia nos países ocidentais. A LLC e o Linfoma Linfocítico de pequenas células (LLS) são manifestações clínicas diferentes de uma mesma doença, caracterizada pela proliferação de linfócitos anormais ou disfuncionais. A diferença entre eles é que na LLC a proliferação ocorre principalmente em sangue periférico e na medula óssea, enquanto que no LLS ocorre nos linfonodos e órgãos linfóides, sendo incomum o envolvimento extramedular. A terceira idade é a principal faixa etária acometida. O curso clínico de tal patologia costuma ser indolente e é comum que os pacientes se apresentem assintomáticos no diagnóstico. Descrevemos um caso de um paciente do sexo masculino, 46 anos, cujo quadro clínico e radiológico inicial foi de dor abdominal em quadrante inferior direito e aumento do apêndice visto em tomografia de abdome, compatíveis com apendicite aguda, além de linfocitose em sangue periférico. O paciente foi encaminhado para apendicectomia e o diagnóstico de LLC/LLS foi realizado através da histopatologia por biópsia e posterior imuno-histoquímica do apêndice cecal e confirmado por imunofenotipagem de sangue periférico. Ainda que a apendicite aguda seja uma das principais etiologias de abdome agudo, neoplasias primárias ou secundárias do apêndice são raras e representam apenas 1% de todas as etiologias de apendicite. Apesar da LLC/LLS ser uma patologia relativamente comum, relatamos uma apresentação atípica em um paciente jovem, o que nos remete à importância dos diagnósticos diferenciais em pacientes com clínica de dor abdominal e apendicite aguda.
Nefrectomia parcial sem isquemia é segura? Pontos sob a lesão controlam o sangramento em abordagem minimamente invasiva
Authors: De Oliveira Pedro Henrique Martins , Araujo Luana Marcelino Mattos , Silva Guilherme Ricardo Nunes , Salgueiro Jose Lucas Rodrigues , Pagamisse Otavio Soriano Teruel , Sanches Raphael de Souza , Rodrigues Junior Lineu Amaro , Argento Antônio Alberto Ramos , Honji Valter Yasushi , Sanches Brunno Cezar Framil
Published: February 2024

Introdução: A nefrectomia parcial é o tratamento padrão-ouro para pequenas massas renais. A extração e sutura do parênquima renal em apenas 20 minutos de isquemia tem sido uma limitação técnica na prática atual. Objetivo: Demonstrar uma nova técnica de nefrectomia parcial sem pinçamento do vaso utilizando pontos prévios sob o tumor, antes da ressecção. Método: Todos os procedimentos foram feitos por via laparoscópica. Os pontos com vicryl 2.0 foram feitos previamente à exérese do tumor após correta demarcação da lesão respeitando as margens livres. Resultados: O estudo contou com 19 pacientes submetidos à nefrectomia parcial. A média de idade foi de 58,26 anos. O tamanho do tumor variou de 1,6 a 4,0cm. A análise anatomopatológica confirmou: 13 tumores de células claras e os outros 3 eram oncocitomas, 1 papilífero tipo 1, 1 angiomiolipoma, 1 cisto. Apenas dois casos apresentaram margens escassas e todos os demais tiveram margens de ressecção livres. Conclusão: A nefrectomia parcial sem isquemia com pontos prévios sob a lesão é uma opção segura e viável em casos selecionados.
Bem-estar animal em bovinos de corte: revisão de literatura
Authors: De Almeida Bernardus Kelner Carvalho , Lopes João Victor Souza Gomes , Costa Ericka Wanessa da Silva , Prazeres Tauany Luz de Oliveira , De Lima Arthur Rodrigues , Oliveira Anne Caroline de Jesus , Vieira Filho Marcos Antônio , Barbosa Fernanda Pereira da Silva , Pimentel Muriel Magda Lustosa , Cruz Raíssa Karolliny Salgueiro
Published: February 2024

Os sistemas de produção de carne enfrentam o desafio de intensificar os processos para atender a demanda global por proteína de origem animal. Além de aumentar a produção, a consideração do bem-estar animal durante a fase de produção primária é indiscutível. Proporcionar bem-estar aos animais é uma responsabilidade humana que deve considerar diversos aspectos como alojamento adequado, manejo, nutrição, prevenção e tratamento de doenças. O objetivo desta atualização foi reunir informações sobre a evolução dos sistemas de engorda de bovinos e os efeitos da intensificação no bem-estar animal e na produção de carne.
Artrite reumatoide - uma revisão abrangente sobre as causas e fatores de risco, diagnóstico, tratamento, complicações e prognóstico
Authors: Loureiro Diego Soares , Teixeira Ana Carolina de Lima , Arruda Deborah Ferreira Duguet , Almeida Késsia Jenifer da Silva , Coelho Rafael de Melo
Published: February 2024

A artrite reumatoide (AR) é uma condição inflamatória crônica que afeta as articulações, apresentando causas multifatoriais e fatores de risco variados. Dentre as possíveis origens, destacam-se fatores genéticos, ambientais e imunológicos, contribuindo para o desencadeamento da doença. O diagnóstico, muitas vezes desafiador, envolve a análise de sintomas como rigidez matinal, dor e inchaço nas articulações, aliada a exames laboratoriais e de imagem. A detecção precoce é crucial para o manejo eficaz. No âmbito do tratamento, abordagens farmacológicas e não farmacológicas são comumente empregadas para controlar a progressão da doença e aliviar sintomas. Medicamentos modificadores da doença, anti-inflamatórios e terapias físicas são parte integrante das estratégias terapêuticas. Além disso, a promoção de hábitos saudáveis e o acompanhamento regular por profissionais de saúde desempenham um papel significativo no controle da AR. Apesar dos avanços nas opções terapêuticas, complicações podem surgir, incluindo deformidades articulares, redução da qualidade de vida e impactos psicossociais. Portanto, a gestão cuidadosa da doença é essencial para minimizar tais desdobramentos adversos. Estratégias preventivas e uma abordagem integrada, envolvendo profissionais de diferentes especialidades, são fundamentais para otimizar os resultados e proporcionar bem-estar aos pacientes. O prognóstico da AR varia, sendo influenciado pela resposta ao tratamento, adesão às recomendações médicas e fatores individuais. Pacientes que recebem cuidados adequados e adotam um estilo de vida saudável tendem a experimentar melhorias na qualidade de vida e na funcionalidade das articulações. No entanto, a natureza crônica da doença ressalta a importância de uma abordagem contínua e personalizada para otimizar os resultados a longo prazo.
Malária - uma revisão abrangente sobre o ciclo de vida do parasito e transmissão, diagnóstico, tratamento, prevenção e controle
Authors: Teixeira Ana Carolina de Lima , Silvestrini Carolina Malheiros Araújo , Arruda Deborah Ferreira Duguet , Loureiro Diego Soares , Dos Santos Karolyne Candida
Published: February 2024

A malária, uma doença parasitária transmitida por mosquitos, é causada pelo Plasmodium, um parasito intracelular complexo. Inicia-se com a picada do mosquito Anopheles, que inocula esporozoítos na corrente sanguínea do hospedeiro humano. Os esporozoítos viajam até o fígado, onde se desenvolvem em formas maduras chamadas de merozoítos, iniciando o ciclo eritrocítico. No ciclo eritrocítico, os merozoítos invadem os glóbulos vermelhos, multiplicam-se e eventualmente os destroem, liberando novos parasitos para infectar mais células. Esse processo está associado aos sintomas característicos da malária, como febre, calafrios e anemia. A transmissão entre humanos ocorre quando mosquitos infectados picam uma pessoa já contaminada e posteriormente picam uma pessoa saudável. O diagnóstico preciso da malária é crucial para a eficácia do tratamento. Testes laboratoriais, como a microscopia de gota espessa, e métodos rápidos de diagnóstico molecular são comumente empregados. A terapia antimalárica é vital para combater a infecção, geralmente envolvendo medicamentos como a artemisinina combinada com outros antimaláricos. A prevenção da malária é multifacetada e inclui o uso de mosquiteiros impregnados com inseticidas, a administração de medicamentos profiláticos e a eliminação de criadouros de mosquitos. O controle efetivo da malária envolve também a educação da comunidade sobre medidas preventivas, o monitoramento epidemiológico e a implementação de estratégias integradas. Assim, a malária apresenta um ciclo de vida intricado, envolvendo a transmissão através de mosquitos, o desenvolvimento no fígado e o ciclo eritrocítico. O diagnóstico preciso é essencial, permitindo a implementação de tratamentos eficazes. A prevenção, centrada na proteção contra picadas de mosquitos e estratégias de controle, é fundamental para reduzir a incidência da doença. Por fim, a abordagem integrada de diagnóstico, tratamento, prevenção e controle é crucial para enfrentar o desafio global representado pela malária.
A economia desgovernada
Authors: Dowbor Ladislau
Published: February 2024

Já estamos vendo as linhas gerais de uma catástrofe em câmara lenta, uma visão que já não é apenas de alguns analistas originais, mas é hoje apresentada por pesquisadores de primeira linha mundial. A convergência quanto aos principais desafios ambientais, com  desigualdade explosiva, fragilização política e caos financeiro gerou uma busca por novos caminhos. A pandemia da COVID tornou apenas mais evidentes os desafios, e a busca de mudanças sistêmicas se intensificou. A humanidade tem servido aos “mercados”. É tempo de inverter a equação, buscando mecanismos econômicos que sirvam ao desenvolvimento sustentável.
Pengaruh Rekrutmen, Seleksi, dan Penempatan Kerja terhadap Produktivitas Kerja pada PT Fast Food Indonesia KFC Cabang Kemang
Authors: Darmawan Rayhan Widyadhana , Syahrian Syahrian
Published: February 2024

Work Productivity is one aspect that plays an important role in the development of a company or organization. In this study, its aims to test the influence between work productivity and recruitment, selection, work placement on employees of PT. XYZ. In this study, used questionnaires to collect data. The sample in this study was 69 employees. The sampling technique in this study used a Nonprobability Sampling method with the saturation sampling. The data analysis method used is multiple linear regression. The analytical data used in this study used classical assumption tests, normality tests, model tests, and hypothesis tests. The results of the analysis in this study indicate that recruitment, selection, and work placement have an influence on work productivity. So that PT. XYZ needs to pay attention to the level of recruitment, selection, and work placement as an effort to improve work productivity.
THE ROLE OF CLINIC INSTRUCTOR AS MOTIVATORS WITH STUDENT READINESS TO CARE FOR COVID-19 PATIENTS
Authors: Sulistiyowati Maria Agustina , Suryani Maria , Ela Cornalia Johanita , Cecila Sagala Agnes
Published: February 2024

The Covid-19 pandemic is still ongoing. When nursing students carry out clinical practice, they have the possibility to treat patients with Covid-19. Clinical supervisors as people closest to students have a role as a motivator to motivate students to be ready to treat Covid-19 patients. The aim is to find out the role of the clinical supervisor as a motivator with the readiness of students to treat Covid-19 patients. Analytical descriptive design, with a cross sectional approach. Population of nursing student Elisabeth College of Health Sciences Semarang. A sample of 170 people was taken by total sampling technique. The data was tested using the Kolmogorov Smirnov test. Most of the respondents (85.9%) rated the role of the clinical supervisor as a motivator in the good category and as many as 156 respondents (91.8%) had high readiness to treat Covid 19 patients. The Kolmogorov Smirnov test results obtained a p value of 1,000, there was no relationship the role of the supervisor as a motivator with readiness to care for Covid 19 patients. It is recommended that students remain vigilant and implement health protocols while carrying out clinical nursing practice Keywords: readiness to treat Covid-19 patients; motivator; clinical supervisor role ABSTRAK  Pandemi Covid-19 sampai saat ini masih berlangsung. Pada saat mahasiswa keperawatan melaksanakan praktik klinik, mereka memiliki kemungkinan untuk merawat pasien dengan Covid-19. Pembimbing klinik sebagai orang yang terdekat dengan mahasiswa memiliki peran sebagai motivator untuk memotivasi mahasiswa agar siap merawat pasien covid-19. Tujuan untuk mengetahui peran pembimbing klinik sebagai motivator dengan kesiapan mahasiswa merawat pasien Covid-19. Desain  deskriptif analitik, dengan pendekatan cross sectional. Populasi mahasiswa keperawatan Sekolah Tinggi Ilmu Kesehatan Elisabeth Semarang. Sampel sebanyak 170 orang diambil dengan teknik total sampling. Data diuji menggunakan uji Kolmogorov Smirnov. Sebagian besar responden (85,9%)  menilai peran pembimbing klinik sebagai motivator dalam kategori baik dan sebanyak 156 responden (91,8%) memiliki kesiapan tinggi untuk merawat pasien Covid 19. Hasil uji Kolmogorov Smirnov didapatkan nilai p value 1,000, tidak ada hubungan peran pembimbing sebagai motivator dengan kesiapan merawat pasien Covid 19. Disarankan mahasiswa tetap waspada dan menerapkan protokol kesehatan selama menjalankan praktik klinik keperawatan Kata kunci : kesiapan merawat pasien Covid-19; motivator; peran pembimbing klinik
representations of ancestral sexuality in rock art, Serra da Capivara National Park, Piauí, Brazil
Authors: Justamand Michel , Funari Pedro Paulo , Marques Marcelia , Fontes Farias Mauro Alexandre , Ramos dos Santos Junior Washington , Alves Balbino Ana Cristina , Cotes Marcial , Frechiani de Oliveira Gabriel , Rampaneli de Almeida Vitor José , Paiva Leandro , Freitas de Oliveira Matteus , Da Silva Belarmino Vanessa , Caldeiras Ana , Rabello Gabriela
Published: February 2024

This essay aims to present some sexual representations in rock art in the Serra da Capivara National Park (PNSC), in southeastern Piauí, Brazil. Since immemorial times, humans have created ways to express themselves, and rock art, engravings and/or paintings were sociocultural forms found to store and safeguard the most varied everyday information of group interests. More than 1,000 archaeological sites are known in the park, representing subjects related to the sociability of ancestral life, such as hunting, gathering, fighting, ceremonies, sexualities and much more. These depictions have been studied since the 1970’s and allowed the creation of a national park recognized as a World Heritage site. Although the paintings depict scenes considered by Western observers as obscene, barbaric and immoral, it is necessary to remember that primitive sexuality was not separate, private subject, to be hidden from the eyes of the social human life, as it is considered by us in 21st century. Key words: sexuality, rock art, prehistoric life, Serra da Capivara National Park, Piauí.
Psychoeducation as an integral component of psychotherapeutic support for patients with COVID-19
Authors: Leshchyna I.
Published: February 2024

The COVID-19 pandemic is the first pandemic in world history that unfolds in the context of the existence of social networks. And therefore, it is accompanied by unprecedented panic, the consequences of which can significantly worsen the own consequences of COVID-19. No one is spared stress during a pandemic, but the most vulnerable to it, are the elderly, children and adolescents, medical workers, and, as sad as it sounds, people with mental illnesses will have to pay the highest price. A comprehensive clinical-psychopathological and psychodiagnostic examination of 125 patients with COVID-19 with non-psychotic mental disorders (68 women and 57 men) with an average age (36.0±3.4) years was conducted. As shown by the results of the clinical-psychopathological study, the clinical picture of non-psychotic mental disorders in the examined patients is represented by depressive, anxious, astheno-neurotic and cognitive syndromes. Taking into account the data obtained during the comprehensive examination on the psychological, pathopsychological, and clinical-psychopathological features of patients with COVID-19, a model of personalized psychotherapeutic support for patients who suffered from COVID-19 was developed, which includes psychotherapy and psychoeducation. According to the results of the study, against the background of the use of psychoeducational programs in the structure of psychotherapeutic support for patients with COVID-19, positive dynamics of the mental state, a decrease in the expressiveness of anxiety-depressive symptoms were noted in the examined patients; positive transformation of coping strategies; the transition of non-constructive types of attitude to the disease into adaptive, constructive ones. Regarding the dynamics of patients’ attitude to disease against background of treatment – types of attitude have changed, which consists in increasing the indicators of harmonious and ergopathic types of attitude to the disease.

Keywords: mental disorders, coronavirus infection 2019-nCoV, psychotherapy, coping strategies, features of patients with COVID-19.
Eksperimen Rumah Pengering Ikan Sarden Model Ultra Violet (UV) Solar Dryer Kombinasi dengan Sistem Solar Air Heater Melalui Variasi Kecepatan Udara Keluar
Authors: Punuf Rolandi , Riwu Defmit B.N. , Koehuan Verdy A.
Published: February 2024

The technique for preserving a new product is by using a drying technique. The development and utilization of solar energy must continue to be developed with several technologies including the Solar Air Heater. The research method used was an experimental method on Ultra-Violet solar dryer drying houses for drying sardines with additional absorption of solar radiation heat using a solar air heater system. This configuration works by drawing air from the building envelope or from the outside environment and passing it through a collector where the air is warmed by conduction and convection in the absorber. The analysis of this study is regarding the velocity of the airflow coming out of the drying chamber, namely 1.0 m/s, 1.5 m/s and 1.8 m/s, while the airflow velocity in the solar panel (exhaust fan) is 3.5 m/s (constant). The results of the study show that the addition of heat through the solar air heater panel can speed up the drying process in the drying chamber. The temperature difference in the solar panel increases the heat absorbed through the hot air flow which also increases the efficiency of the solar panel. The highest efficiency of the drying house is 48.05 % occurring at the outlet air flow rate of 1.8 m/s. The temperature difference in the drying chamber and the increased ambient air tends to increase the efficiency of the drying chamber where in this study the highest value of 48.05% was obtained at a speed of 1.8 m/s
Simulasi CFD (Compulational Fluid Dynamics) Turbin Angin Sumbu Horizontal Tipe Propeler Tiga Blade Rotor Ganda Melalui Variasi Geometri
Authors: Koehuan Verdy A. , Hale Roybertho Agustinus , Mangesa Daud P.
Published: February 2024

Tujuan penelitian ini adalah untuk mengetahui performa turbin angin sumbu horisontal atau horizontal axis wind turbine (HAWT) tipe propeler tiga blade rotor ganda kontra rotasi (double rotor counter-rotation) terhadap variasi geometri rotor CRWT menggunakan metode computational fluid dynamics (CFD). Hasil simulasi CFD rotor turbin CRWT dengan penurunan skala geometri menunjukkan turbin cenderung beroperasi pada TSR rendah. Rotor depan turbin CRWT cenderung beroperasi dengan koefisien daya dan TSR yang lebih tinggi dari rotor belakang. Vektor kecepatan aliran pada bidang vertikal arah aksial CRWT juga dikonfirmasi oleh hasil analisis kontur kecepatan aliran dan kontur turbulent kinetic energy terhadap penurunan performa CRWT karena adanya penurunan faktor skala geometri rotor turbin. Vektor kecepatan pada tip blade antara rotor depan dan rotor belakang pada turbin CRWT dengan penurunan skala geometeri (FC = 0,25 dan 0,26 serta 0,3) yang beroperasi di TSR rendah yang arahnya cenderung menguat menuju ke tip blade dengan besaran vektor yang makin kuat di sisi hisap (suction surface) blade rotor belakang. Besaran vektor ini semakin kuat ini dapat membentuk vorteks yang menurunkan performa CRWT.
Karakterisasi Minyak Hasil Pirolisis Berbahan Dasar Limbah Plastik Jenis Polypropylene (PP)
Authors: Adoe Dominggus G. H. , Satria Devi Yola , Sanusi Arifin
Published: February 2024

Penelitian ini dilakukan untuk mengetahui karakteristik minyak pirolisis sampah plastik dan membandingkannya dengan karakteristik dari bensin. Hal yang diteliti meliputi sifat fisik dan kimia minyak pirolisis, Sifat fisik yang diteliti meliputi viskositas dan massa jenis, sedangkan sifat kimia adalah nilai kalor. Penelitian dilakukan menggunakan plastik Polypropylene (PP), reaktor yang digunakan adalah reaktor tunggal dengan temperatur reaktor diatur pada suhu 300 dan 3500C. Hasil penelitian menunjukkan bahwa nilai kalor minyak pirolisis yaitu 0,194068464 J – 0,209067264 J, massa jenis yaitu 0,7941 – 0,8083 kg/l dan viskositas yaitu 0,9500151572 cPs - 0,9651967743 cPs.
Studi Eksperimen dan Simulasi Termodinamika Mini Refrigerator
Authors: Dama Firdaut Loja , Adoe Dominggus G. H. , Dwinanto Matheus Magnus
Published: February 2024

Household refrigeration machines (fridges) are household appliances that are widely used in families in Indonesia. However, the use of working fluids still uses this type of working fluid which causes thinning of the ozone layer and global warming. Therefore, this research aims to analyze the effect of evaporation temperature on work coefficient and exergy efficiency by using R600a working fluid as an environmentally friendly fluid. This research uses experimental and simulation methods using Cooltols software. The research results show that increasing the evaporation temperature has an impact on increasing the work coefficient, the heat absorbed by the evaporator but reducing the compressor power, and the heat released by the condenser. The greatest increase in exergy destruction is found in the evaporator, where exergy efficiency increases. So R600a is very suitable for use in refrigerators.
Studi Pengaruh Rasio Tekanan Kompresor Turbocharger Terhadap Kinerja Mesin Diesel
Authors: Dwinanto Matheus M. , Pell Yeremias M. , Wadu Arky B. J.
Published: February 2024

Penggunaan turbocharger di mesin-mesin diesel berukuran besar telah menjadi tuntutan karena dapat meningkatkan daya keluaran dan efisiensi mesin dengan memanfaatkan gas buang sisa hasil pembakaran (exhaust gas). Turbocharger merupakan sebuah peralatan untuk menambah asupan udara yang masuk ke dalam silinder dengan memanfaatkan energi gas buang hasil pembakaran. Adapun tujuan penelitian ini adalah menganalisis pengaruh perbedaan rasio tekanan turbocharger terhadap kinerja mesin diesel menggunakan perangkat lunak Diesel-RK. Mesin diesel yang diteliti adalah tipe 4D56 2.5L yang menggunakan turbocharger tunggal dengan maksimum daya 136 PS pada putaran 4000 rpm, dan torsi maksimum 324 Nm pada 2000 rpm. Rasio tekanan kompresor yang diteliti hanya 1,5 dan 2,5 yang dibandingkan dengan mesin diesel tanpa turbocharger (Natural Aspirated/NA). Kapasitas mesin 2477 cc, 4 silinder, dan rasio kompresi 18:1. Bahan bakar yang digunakan adalah Biodiesel SME (Soya Methyl Ester, C15H28) dengan angka setana 56,5. Hasil dari penelitian ini menunjukkan bahwa penggunaan turbocharger akan menyebabkan peningkatan daya mesin, terutama pada rasio tekanan kompresor yang tinggi karena pengisian udara yang lebih besar bila dibandingkan dengan mesin diesel NA untuk rentang putaran mesin 750 rpm sampai dengan 5000 rpm. Untuk mesin diesel yang menggunakan turbocharger, BSFC akan berkurang dengan meningkatnya putaran mesin.
Studi Pengaruh Temperatur Kondensasi Terhadap Kinerja Siklus Rankine Organik Menggunakan Fluida Kerja R245FA Dan R515A
Authors: Lobo Jefrianto , Dwinanto Matheus M. , Nurhayati Nurhayati
Published: February 2024

Sejak tahun 2000 pembangkit listrik dengan siklus Rankine organik (organic Rankine cycle/ORC) adalah yang paling banyak digunakan di dunia yang memanfaatkan sumber kalor bertemperatur rendah seperti limbah kalor industri, biomassa, geothermal, dan energi surya.  Fluida kerja untuk sistem ORC harus memenuhi beberapa kriteria sifat fisik diantaranya, ramah lingkungan, tidak mudah terbakar, tidak beracun, dan tidak korosif. Oleh karena itu, penelitian ini bertujuan untuk menganalisis pengaruh temperatur kondensasi terhadap kinerja termodinamika siklus Rankine organik standar berdaya turbin 20 kW dengan fluida kerja R245fa, dan R515A. Simulasi kinerja sistem menggunakan perangkat lunak Genetron Properties dengan temperatur evaporasi dipertahankan konstan pada 80oC dan temperatur kondensasi divariasikan pada 30 – 40oC. Hasil studi ini menunjukkan bahwa peningkatan temperatur kondensasi sangat berdampak pada meningkatnya konsumsi daya pemompaan tetapi menurunkan rasio tekanan di turbin, dan efisiensi termal sistem. Daya pemompaan yang digunakan untuk mensirkulasikan R515A ±2,2 kali lebih tinggi dibandingkan mensirkulasikan. Efisiensi termal sistem ORC yang menggunakan kedua fluida kerja yang ditinjau tidak memiliki perbedaan yang signifikan
Rancang Bangun Alat Pencampur Pakan Ikan Dengan Mekanisme Sistem Gerak Rotary Menggunakan Metode VDI 2221
Authors: Salem Arianto , Mangesa Daud Pulo , Maliwemu Erich
Published: February 2024

Seiring dengan perkembangan ilmu pengetahuan dan teknologi inilah yang mendukung untuk membuat Mesin Pencampur Pakan ikan. Tujuan utama dalam menciptakan inovasi teknologi ini supaya hasil yang didapat lebih efektif, efisien dan berkualitas.  Pembuatan alat ini sudah melalui beberapa proses perhitungan secara teoritis gaya-gaya yang terjadi pada saat mesin bekerja, pemilihan material komponen, dan proses pengerjaan kemudian merakit komponen-komponen mesin, menguji kinerja mesin sesuai perancangan dengan bahan pakan ternak. Dalam perancangan ini system mekanis mesin Pencampur pakan ikan sumber putaranya adalah motor gear yang menggerakan sabuk dan puli yang terhubung langsung ke reduser yang kemudian menggerakan poros Pencampur dengan rantai dan sprocket sebagai pengantar.

 

 

Kata Kunci : Tepung Ikan, Tepung Tulang, Udang. Mesin Pencampur,Metode VDI 2221.
Pengaruh Ketebalan Briket Arang terhadap Perubahan Temperatur dan Kelembaban pada Desalinasi Surya Sistem Interfacial Heating
Authors: Siagian Saut Ronny Tuah , Jafri Muhamad , Tarigan Ben V. , Riwu Defmit B. N. , Adoe Dominggus G. H.
Published: February 2024

Desalinasi surya merupakan proses pengurangan kadar garam dari air asin dengan memanfaatkan panas matahari untuk menghasilkan air tawar. Distilasi sebagai salah satu metode desalinasi surya tradisional kerap diaplikasikan tetapi memiliki laju evaporasi yang rendah. Dalam beberapa tahun terakhir, interfacial heating telah diusulkan sebagai alternatif evaporasi dengan menciptakan lokalisasi panas pada permukaan cairan. Dalam penelitian ini, briket arang diteliti sebagai material solar absorber untuk mempercepat proses evaporasi. Percobaan dilakukan pada 4 basin tipe single slope dengan menggunakan briket setebal 10, 15 dan 20 mm selama 8 jam di bawah sinar matahari. Basin tanpa arang juga diuji sebagai perbandingan. Temperatur dan kelembaban diukur di beberapa titik dalam basin untuk mengidentifikasi faktor-faktor yang mempengaruhi evaporasi. Telah ditemukan pembentukan uap meningkat ketika temperatur tinggi dan kelembaban rendah. Sedangkan kondensasi sangat bergantung pada kelembaban, kelembaban yang tinggi mampu membuat molekul uap air lebih cepat mencapai titik embunnya. Proses kondensasi ini akan sangat berdampak pada produktivitas distilat.
Analisis Kandungan Hasil Proses Gasifikasi Sekam Padi
Authors: Sanusi Arifin , Jasron Jahirwan Ut , Tamonob Kristoforus
Published: February 2024

Biomassa sekam padi dapat dirubah menjadi energi terbarukan, Energi dapat diperoleh dengan pembakaran biomassa secara langsung, dapat juga dengan pirolisis (tanpa adanya oksigen) atau gasifikasi (dengan oksigen terbatas) untuk menghasilkan bahan bakar cair atau bahan bakar gas. Gasifikasi merupakan proses pembakaran bahan bakar padat dalam wadah gasifier untuk menghasilkan bahan bakar gas (syngas). Penelitian ini dilakukan dengan memvariasikan massa bahan bakar sekam padi terhadap gas hasil gasifikasi. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh massa bahan bakar sekam padi terhadap gas hasil gasifikasi dan untuk mengetahui pengaruh gas hasil gasifikasi pembakaran sekam padi terhadap efisiensi termal. Hasil pembakaran tungku gasifikasi menunjukan bahwa semakin banyaknya massa sekam padi maka semakin banyaknya pula gas yang dihasilkan. Berdasarkan hasil perhitungan efisiensi termal untuk massa sekam padi 5 kg menjadi 302,69% dan massa sekam padi 10 kg menjadi 250,75% sedangkan untuk massa sekam padi 15 kg menjadi 129,38%.
Rancang Bangun Alat Pencacah Batang Pisang Menjadi Bahan Baku Pembuatan Pupuk Organik
Authors: Koebanu Iwi , Pell Yeremias M , Maliwemu Erich U.K.
Published: February 2024

Penelitian yang telah dilaksanakan adalah tentang “rancang bangun alat pencacah batang pisang menjadi bahan baku pembuatan pupuk organik. Tujuan penelitian ini adalah merancang bangun mesin pencacah batang pisang yang dapat mempersingkat waktu proses pencacahan dibandingkan proses pencacahan manual, untuk digunakan sebagai bahan baku pembuatan pupuk organik yang diharapkan dapat membantu masyarakat pertanian, untuk mempermudah proses produksi pencacahan batang pisang yang bisa jadi bahan untuk pupuk dengan waktu yang lebih singkat dan tenaga yang lebih efisien, dapat meningkatkan produksi pertanian baik kualitas maupun kuantitas, meningkatkan kualitas lahan secara berkelanjutan dan dapat mencegah degradasi lahan dan dapat menekan biaya operasional daripada harus membeli pupuk kimia yang relative mahal. Metode yang digunakan dalam penelitian ini adalah metode rancang bangun. Hasil penelitian menunjukan rancang bangun alat pencacah batang pisang menjadi bahan baku  pupuk organik yang dirancang dan diujicoba telah berfungsi secara baik sesuai dengan hasil rancangan. Dari hasil pengujian kinerja mesin pencacah batang pisang ini memperlihatkan bahwa mesin beroperasi dengan sangat baik dalam mencacah batang pisang, dengan hasil cacahan ± 5-11 mm dan kapasitas pencacahanya adalah 98 kg/jam. Semua komponen dari mesin pencacah batang pisang ini bekerja dengan baik sesuai fungsi komponen masing-masing.

Kata Kunci: Rancang Bangun, Pencacah Batang Pisang, Pupuk Organik.
Rancang Bangun Reflektor Cahaya Matahari Dengan Cermin Datar Berbasis Mikrokontroler Untuk Alat Solar Pasif Desalinasi
Authors: Pell Yeremias M. , BOYMAU MAIKEL WAHYUDI , Tarigan Ben V.
Published: February 2024

Telah dilakukan penelitian tentang rancang bangun reflektor cahaya matahari dengan cermin datar berbasis mikrokontroler untuk alat solar pasif desalinasi. Tujuan penelitian ini adalah membuat rancang bangun reflektor cahaya matahari menggunakan cermin datar berbasis mikrokontroler untuk alat solar pasif desalinasi yang dapat berfungsi dengan baik sehingga bisa digunakan oleh masyarakat pesisir pantai yang membutuhkan air tawar. Metode yang digunakan dalam penelitian ini ada rancang bangun. Penelitian ini dimulai dengan melakukan rancang bangun reflektor dan bingkai reflektor, merancang dudukan servo, rancang lengan penghubung serta melakukan pengujian menggunakan air laut. Hasil penelitian menunjukkan rancang bangun  alat reflektor cahaya matahari berbasis mikrokontroler untuk alat desalinasi dengan dimensi panjang 60 cm, lebar 30 cm, dan tinggi 55 cm dengan sistem penggerak menggunakan Arduino UNO dan motor penggerak menggunakan motor servo DS3225 25 kg dan dengan tiga sudut bukaan reflektor yaitu sudut 30⁰, 45⁰ dan 60⁰ yang bergerak secara otomatis setiap 2 jam serta produksi air tawar yang dihasilkan dalam proses desalainasi 6 jam yaitu 940 ml.

Kata Kunci: Desalinasi, Rancang Bangun, Cahaya Matahari, Arduino UNO
Az alkalmazott és az autonóm művészet szakrális alkotásokban : Jézus-ábrázolások nyomában
Authors: Karikó Sándor
Published: February 2024

Ez a tanulmány bemutat néhány markáns, részben a szerző által készített felvételt (például a kortárs Fernando Botero és Földi Péter képeiről, a szicíliai Noto és San Nicolo, továbbá Mexikóváros székesegyházában, valamint a szegedi Szent Erzsébet és Szent Gellért templomban látható új és egyedülálló szoboralkotásokról), amelyek azt szemléltetik, miként lehet meglátni a mindenféle gyakorlatias, kiegészítendő funkciójú tömegtermékeken túl az ilyesféle alkalmazott művészetben autonóm jelentéstartalmat, lebilincselő és izgalmas mondanivalót, ezáltal nagy valószínűséggel kiváltva bennünk a katartikus élményt.
Szépség és öröm : Gondolatok a hazai kortárs transzcendens művészetről
Authors: Kovács-Gombos Gábor
Published: February 2024

Szépség és öröm. Olyan kategóriák, amelyekre a művészet évezredek óta támaszkodik, amelyeket sok alkotás Isten legfőbb tulajdonságaként értelmezett. Az írás néhány hazai mű, művész, helyszín és galéria felvillantásával szeretné bizonyítani, hogy ma már valóban a posztszekularizáció idejét éljük, amikor a szakrális iránti érdeklődés megnőtt, amikor a transzcendenssel foglalkozó művek egyre gyakrabban igénylik azokat a közösségi tereket, amelyek eddig szinte kizárólag a profán művészet bemutatóhelyei voltak.
Comparative social network analysis (SNA) of FP7 and Horizon 2020 projects on remote sensing
Authors: Tóth Zsolt
Published: February 2024

As part of the data collection, data from all FP7 and Horizon 2020 projects were downloaded from the CORDIS data tables and converted into a relational table. After data cleaning and linking the tables, we queried the remote sensing projects of the two programmes, mapped the network of project participants in the two programmes, and compared the network indicators and the distributions of degree rates. A scale freedom of degrees seems to be a relevant assumption.
„Ut pictura poesis” : Az intermedialitás megjelenési formái Tandori Dezső költészetében
Authors: Zámbó Bianka
Published: February 2024

A két művészeti ágnak – irodalomnak és képzőművészetnek – vannak olyan határterületei, ahol szó és kép médiuma között szoros érintkezés fedezhető fel. Dolgozatomban Tandori Dezső Ördöglakat című kötetének rajzverseivel, valamint a magyar irodalomban jelenlévő vizuális költészeti hagyománnyal foglalkozom. Egy konkrét rajzvers elemzésén túl – Kibédi Varga Áron fogalmával élve – a szó–és–kép viszonyok irodalomelméleti vizsgálatára teszek kísérletet.
Notatki florystyczne z Tatrzańskiego Parku Narodowego
Authors: Zięba Antoni , Wróbel Sławomir , Ociepa Anna Maria , Kauzal Paweł , Sitarz Magdalena , Binkiewicz Bogusław , Delimat Anna , Koczur Anna , Matysek Marcin , Sęktas Marian , Górski Piotr , Król Maria , Rabiasz Jarosław , Broński Stanisław , Grzejszczak Grzegorz , Koopman Jacob , Więcław Helena , Zwijacz-Kozica Tomasz
Published: February 2024

This paper presents new localities of rare, threatened and newly discovered vascular plant species in Tatra National Park (S Poland). Data were collected during field studies carried out mainly in 2020–2022. We have described 122 localities of 57 taxa, including 10 new once for the local flora, providing basic topographic, site and population data.
Nowe stanowisko Clathrus archeri (Phallaceae, Agaricomycetes) w Karkonoskim Parku Narodowym
Authors: Janik Paulina , Malicki Marek , Ronikier Anna , Suchan Tomasz
Published: February 2024

Clathrus archeri is one of several alien species for the Polish mycobiota. It has been brought over to Europe from Australia and New Zealand and was recorded for the first time in Poland in the 70s of the 20th century. Since then, records of this species have steadily increased, with their majority located in the southern part of Poland. This paper presents a new locality of C. archeri in the Karkonosze National Park, in ATPOL square AE89 (50°46′04.4″N, 15°42′10.6″E), elevation: 1100 m a.s.l. (Fig. 1). To date, this is the highest known locality of C. archeri in the Karkonosze National Park and the Sudetes.
Nowe stanowiska Senecio inaequidens (Asteraceae) w zachodniej Polsce
Authors: Czarna Aneta
Published: February 2024

The natural range of distribution of Senecio inaequidens is South Africa. In Poland, the species was reported for the first time in 1987, from the main railway station in Katowice. It is currently classified as a potentially invasive epecophyte (i.e. recently introduced, numerous but confined to artificial habitats). In western Poland it was found in 10 new localities, each one in a different ATPOL square (10 km × 10 km). It is growing on roadsides, occurs often after road reconstruction, and on railway grounds without dense vegetation. The exception was a locality in Poznań, near Hetmańska Street, where coverage of the herb layer reached 95% (Fig. 1). The species has been observed there since 2012.
Estrategias sustentables para controlar la contaminación acústica en espacios urbanos y residenciales
Authors:   , Rizzo La Malfa Ana María
Published: February 2024

El presente trabajo de investigación, teórico-experimental, aborda las estrategias basadas en la naturación destinadas a la mitigación y el control de la contaminación acústica en edificios ubicados en zonas urbanas residenciales críticas. El planteo se enmarca en el contexto de la sustentabilidad con perspectiva biofílica mediante las Soluciones Basadas en la Naturaleza (NbS), orientándose hacia la naturación urbana o greening aplicada a las envolventes que, como en los sistemas de jardines verticales (SJV), aprovechan los espacios ociosos de los edificios en altura. Los sistemas de jardines verticales aplicados a las fachadas ofrecen un conjunto de funciones específicas, o servicios ecosistémicos, entre las que se cuentan la reducción del ruido proveniente del exterior, el incremento de las superficies en la Infraestructura Verde Urbana y permiten los créditos ambientales en las construcciones sustentables. Se analizaron varias tipologías tecnológicas de los sistemas de jardines verticales modulares aplicados en fachadas, a partir de modelos teóricos y de ensayos experimentales en laboratorio. El análisis teórico de los sistemas de jardines verticales modulares se desarrolló a partir de la Teoría de los Sistemas Complejos, eficaz en este caso dada la interrelación e interdependencia entre los elementos que componen los ecosistemas principales, el natural y el construido, y los subsistemas asociados. El análisis experimental se desarrolló en el Laboratorio de Acústica y Luminotecnia de la Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (LAL-CIC) sobre una muestra representativa formada por un conjunto de módulos-prototipos fabricados por el Laboratorio Bio-Ambiental de la Universidad de Flores (UFLO), a los que se les aplicaron ensayos de aislamiento y absorción acústica. Durante el trabajo se realizaron, además, análisis acústicos de ocho prototipos sustentables desarrollados con los alumnos del último año del Taller de Diseño Industrial (FA-UNLP) a partir de la consigna de optimizar las prestaciones acústicas de cada módulo.
The Relationship between Student Attitude regarding Basic Life Support with Student Motivation in Helping Victims of Cardiac Arrest among Nursing Students
Authors: Nunung Liawati Nunung Liawati , Rani Indriani  , Indri Lestari
Published: February 2024

Cardiac arrest is an emergency condition that often occurs. This relatively high incidence underlies the importance of attitudes about basic life support in the initial management of cardiac arrest. A positive attitude about basic life support and supported by the helper's motivation in dealing with victims of cardiac arrest can increase survival rates. Basic Life Support is a series of initial effects to restore respiratory and or circulatory function in someone who has experienced respiratory arrest and or cardiac arrest. This study was a correlational research. The population was all regular undergraduate nursing students with proportional random sampling (155 respondents). Data collection technique with a questionnaire. The analytical method used Chi-Square with a p-value of 0.000 ≤ 0.005. The results showed that students who had positive attitudes about basic life support had moderate motivation in helping victims of cardiac arrest and students who had negative attitudes about basic life support had low motivation in helping victims of cardiac arrest. The conclusion showed that there was a relationship between students' attitudes about basic life support and student motivation in helping victims of cardiac arrest among students at STIKES Sukabumi.
The Relationship of Stimulation Implementation with Developmental Abilities in Pre-school Age Children
Authors: Tressia Febrianti  , Astuti Yuni Nursasi  , Poppy Fitriyani
Published: February 2024

Preschool period to be a conducive period for developing various kinds of abilities, intelligence, talents, physical, cognitive, language, emotional and spiritual abilities in children. One of the factors that has a big influence in supporting children's development is the stimulation factor. The purpose to analysis the relationship application of stimulation to the developmental abilities with pre-school children. The research design is quantitative with a correlational descriptive method using a cross sectional study approach. This research used 242 respondents who were mothers of pre-school children aged 48-72 months and who were actively participating in kindergarten education. The research results showed that the application of developmental stimulation had been carried out well in 51.2% of respondents. Children's developmental abilities, 62% of children have appropriate developmental abilities, 28.9% of children have doubtful developmental abilities and 9.1% of children have the possibility of deviations in their development. From the results of statistical tests using the chi square test, it was found that the value of p = 0.000 < α 0.05 was statistically significant, so there was a significant relationship between the application of child development stimulation to the developmental abilities of pre-school aged children.
Relationship Physical Activity and Eating with Gout Arthritis in Sukamaju Village
Authors: Ikhsan Hidayatulloh Ana , Lutfiah Batuli Fatimahi  , Asep Rahmadiana
Published: February 2024

Arthritis is one of the diseases whose incidence is quite wide and can affect anyone regardless of age and ethnicity. Most cases of Gout arthritis have a primary background, so it requires long-term control of uric acid levels. The purpose of this study was to determine the relationship between physical activity and diet with the incidence of gout arthritis in Sukamaju village. This type of research used quantitative methods with analytical surveys with a cross sectional approach. The sample in this study was 80 respondents, the sampling technique was using random sampling. Data collection techniques used a physical activity questionnaire and dietary pattern questionnaire as well as examination using a uric acid tool. The analysis used univariate and bivariate with the Chi-Square Test. The results of this study showed that there was a relationship between physical activity and diet with gout arthritis with a p-value of 0.000 (ɑ 0.05). Based on research results, prevention of gouty arthritis is very important to improve the quality of life, this can be obtained with education and a low purine diet and a good diet and a healthy lifestyle.