bluuebunny/crossref_metadata_2025 huggingface dataset:
STRATEGI KEGIATAN LITERASI DALAM MENINGKATKAN MINAT BACA PESERTA DIDIK DI SEKOLAH DASAR
Authors: Sukma Hanum Hanifa
Published: July 2022

Penelitian merupakan penelitian kepustakaan (library research). Pengumpulan data dengan menggunakan dokumentasi, dari jurnal-jurnal penelitian. Analisis data dilakukan dengan menggunakan analisis analisis isi (content analysis). Strategi literasi di sekolah dasar dalam meningkatan minat baca, pada tahap pembiasan adalah melaksanakan membaca 15 menit sebelum mata pelajaran di mulai, membuat pojok baca, dan menciptakan lingkungan kaya teks. Pada tahap pengembangan, dengan mengadakan jam wajib berkunjung ke perpustakaan, melakukan pengembangan kegiatan membaca 15 menit sebelum pelajaran, mengadakan kegiatan majalah dinding, dan kegiatan pengembangan literasi lain. Tahap pembelajaran dengan kegiatan membaca di awal, tengah, atau menjelang akhir pelajaran, menggunakan berbagai metode dan media, dan melakukan pembelajaran di perpustakaan pada saat-saat tertentu. Faktor pendukung adalah semangat peserta didik, dukungan guru, adanya fasilitas fisik dan sarana prasarana, serta anggaran  yang memadai, partisipasi aktif warga sekolah, dan dukungan orang tua dalam kegiatan literasi. Faktor penghambat adalah masih adanya peserta didik kurang bersemangat, Rendahnya pemahaman dan kesadaran guru terhadap pentingnya kegiatan literasi, Keterbatasan sarana fisik, dan kurangnya dana yang dimiliki sekolah.
Konsep Asesmen Kompetensi Minimum untuk Meningkatkan Kemampuan Literasi Numerasi Siswa Sekolah Dasar
Authors: Rohim Dhina Cahya
Published: July 2022

Penyelenggaraan ujian nasional mengalami permasalahan mulai dari sebelum pelaksanaan, proses pelaksanaan dan pasca pelaksanaan. Pemanfaatan hasil ujian nasonal sebagai satu – satunya indicator keberhasilan siswa selama proses belajar tentunya belum tepat. Sehingga dilakukan perubahan dalam system evaluasi di Indonesia.  Penghapusan ujian nasional secara tidak langsung memberikan dampak terhadap proses pembelajaran di sekolah. Sebagai pengganti dari ujian nasonal ini adalah Asesmen Kompetensi Minimum (AKM) dan survey karakter. Tujuan penelitian ini adalah untuk memberikan pengetahuan tentang konsep Asesmen Kompetensi Minimum (AKM) guna meningkatkan kemampuan literasi numerasi siswa di sekolah dasar. Metode penelitian yang digunakan adalah penelitian studi pustaka. Dari hasil penelitian diperoleh bahwa Asesmen dilaksanakan bukan berdasar pada kemampuan menguasai materi sesuai kurikulum seperti dalam ujian nasonal, tetapi dirancang untuk memetakan dan memperbaiki kualiitas pendidikan secara menyeluruh. Asesmen Kompetensi Minimum (AKM) berfokus pada penguasaan kompetensi literasi dan numerasi yang akan diukur. Dengan demikian, pelaksanaan Asesmen Kompetensi Minimum (AKM) diharapkan dapat meningkatkan kemampuan literasi numerasi siswa di sekolah dasar.
Optimalisasi Aplikasi Google Maps sebagai Alternatif Media Promosi pada UMKM di Shelter Taman Sriwedari
Authors: Insani Salman Faris , Syahrial Yoppi , Putra Ardian Prima
Published: July 2022

The Surakarta City Government built the Taman Sriwedari Culinary Shelter to accommodate MSMEs due to the relocation. Most of these MSMEs had to start from scratch because of the loss of customers and the low interest of visitors because most people did not know about the shelter’s existence. The main problem for partners is limited knowledge in marketing and promotion. This service aims to transfer science and technology to MSMEs by implementing mentoring activities in marketing and advertising. The solution to the problem is to optimize information technology based on Google Maps as an alternative media for promoting MSMEs at the Taman Sriwedari culinary shelter. Using this technology, it is hoped that the location of MSME partners will be easier to reach and increasingly known by the public. The method carried out is divided into five stages: initial socialization of the benefits of the google map application as an alternative media promotion, counseling and training on the practice of making, optimizing, and managing google map accounts, addresses on google maps, sharing locations from google maps, and adding photos & reports. Social media on google maps. To identify an increase in the knowledge of MSME partners regarding the material presented, a pretest and posttest were carried out. After the training was held, the impact was that MSME partners experienced increased knowledge according to the target. The evaluation results at each stage of the activity, the showed that the post-teste increased 25% compared to the pretest score. In addition, the outcome of this activity is the ownership of a Google Maps account that has been optimized for each participant. Based on the indicators that have been measured, it can be concluded that this training & mentoring activity is categorized as successful. The expected follow-up in the future is that partners can optimize the use of the Google Map application as an alternative media for promotion independently and sustainably. The hope is that the location of their MSMEs will be more easily accessible and known by the wider community. Partners are also advised not to hesitate to actively discuss with the Univet Bantara Community Service Team if they encounter obstacles.
Perception of individual and group discrimination among LGB individuals in Puerto Rico: A descriptive study
Authors: Esteban Caleb , González-Rivera Juan Aníbal
Published: July 2022

Background: Discrimination is one or more unjustified negative behaviors towards a person based on one or more characteristics of that person. In the case of lesbian, gay, and bisexual (LGB) persons, they have been constant victims of stereotypes, prejudices, and discrimination around the world. However, few scientific studies explore the experiences of discrimination in Puerto Rico, since most studies have focused on negative attitudes, prejudice, and social distance. Objective: The aims of this brief report are 1) to describe in detail the relative importance of the quality of the items of the Perceived Discrimination in the LGB Community Scale, and 2) to describe the experiences of discrimination both at the individual and group level of an LGB sample according to the order of relative importance found. Method: This research had a quantitative method with a descriptive study design, instrumental type. To meet the objective of this study, the data collected in each item was independently evaluated to examine the experience and perception of each participant in the situation presented by each premise. A non-probability sample of 300 LGB participants was recruited in Puerto Rico. Results: The area with the highest reported experiences of individual discrimination was the relationship category (M=.700), followed by psychological (M=.630), society/environmental (M=.566), family/employment (M=.566) and physical (M=.386) respectively. The area with the highest perceptions of group discrimination reported by the sample was the education/health category (M = .882), followed by culture/society (M=.827), politics (M=.803), maternity/paternity (M=.802) and locality (M=.791) respectively. Conclusion: When analyzing all the items, it was observed that the results of the first 22 positions according to the Relative Importance Index, correspond to the experiences of discrimination in a group way. This means that people perceive greater discrimination as a group than the discrimination they perceive about their own person.
WORK LIFE HARMONY AKUNTAN: KAPAN DAN MENGAPA?
Authors: Yessica Yessica , Efferin Sujoko
Published: July 2022

Accountant profession, especially consultant, is known with inflexible and overloaded work stereotypes. Thus, accountants tend to experience difficulties in balancing time spent in aspects of work and others. Therefore, the concept of work life harmony is more in line with accountants, where everyone has their respective compositions for harmony. The company strives to facilitate through various work life programs. However, those programs can’t accommodate all employee’s needs. So, companies arrange organizational values and activities aimed at empowering accountants. Through empowerment, accountants can help themselves to overcome conflicts and achieve harmony. This study used qualitative interpretive paradigm and aims to understand the linkages of organizational values and employee empowerment to the achievement of work life harmony for PT S accountants. The results indicate that organizational values translated into various empowerment activities contribute to the achievement of accountant harmony, which appears to be subjective and psychological well being of accountants. The organization still has various limitations in supporting that achievement. At a stage where everything depends on accountants’s intrinsic motivation, the organization can no longer help that achievement. Therefore, it is important for accountants to strive to achieve their own harmony.
Relationship between the coronavirus pandemic and criminal activities: Emerging evidence from Fiji Islands
Authors: Singh Kunal , Shah Tayyab , Raj Amrit
Published: July 2022

Introduction: The spread of the coronavirus has led to strict containment measures around the world, simply to restrict the gathering of a large number of people. In Fiji, the COVID-19 lockdown measures are affecting different social aspects, including crime rates and criminal activities.

Methods: This study was based on a secondary analysis of aggregated crime data, presenting preliminary analyses on crime trends across the Fiji Islands, during the first six months of the curfew period. It considers how the crime patterns shifted due to the numerous containment restrictions. We studied the crime data during the first six months of the curfew period, starting from March 31 to September 30, 2020, against the average of crime occurrences for the same period over the last four years (2016-2019).

Results and Discussion: The study shows an overall increase of 18.8% in crime occurrences, during the curfew period. The disobedience against lawful orders were largely made up of curfew breaches (with an astounding increase of 2602 cases), with the southern and western divisions registering the majority of offences. The study also provides evidence of a decrease in offences against public morality (-41.7%) and property (-26.8%) during the curfew period, which could most likely be linked to strict stay-home restrictions and limited mobility. Criminal offences such as burglary (-24.6%), theft (-22%) and aggravated robbery (-23.3%) show a decreasing trend in the curfew period. However, a worrying increase in offences against the drugs ordinance act (104.4%), common assault (28.6%), serious assault (97.4%) and criminal intimidation (36.8%) is noted in this study. It could be interpreted that the central division (-46.4%) was possibly the safest area in Fiji during the first few months of the curfew, while the southern (17.9%) and western (29.2%) continue to show an increasing crime trend.

Conclusion: The findings of this research are consistent with the predictions of the routine activity theory, which estimates crime rates to fluctuate during an exceptional event. Regardless of some limitations and directions for future research, the current study contributes to the literature on exceptional events and crime through an ongoing pandemic in the South Pacific.

Keywords: Coronavirus, Fiji, lockdown, crime rates
Romi u Hrvatskoj kroz povijest – od nepoznavanja i stereotipizacije do prihvaćanja i integracije
Authors: Racz Aleksandar
Published: July 2022

Uvod: Zdravstveno veleučilište je jedina visokoškolska ustanova u Hrvatskoj koja od 2015., poštujući pravilo pozitivne diskriminacije, svake akademske godine omogućava upis po jednog najbolje rangiranog pripadnika romske zajednice na svaki od studijskih smjerova iz područja zdravstvenih neliječničkih profesija, zahvaljujući čemu se broj pripadnika romske manjine sa završenom najvišom razinom edukacije znatno povećava na dobrobit same zajednice, ali i društva u cjelini.Cilj i svrha rada: Svrha je rada približiti romsku problematiku prvenstveno drugim studentima pojedinih smjerova zdravstvenih profesija kako bi se dodatno povećalo razumijevanje važnosti uvedene prakse pozitivne diskriminacije i dodatno potaknulo većinsko stanovništvo na integraciju Roma u sve aspekte društva, uz uvažavanje i poticanje očuvanja posebnosti i bogatstva romske zajednice.Metode rada: U radu se na temelju korištenja sekundarnim, javno dostupnim podacima, kao i rezultatima ranije provedenih istraživanja, postupcima analize i sinteze te indukcije i dedukcije daje pregled prisutnosti Roma u Europi i u Hrvatskoj te opisuju osnovna obilježja njihova porijekla, načina života, vjeroispovijesti, jezika i kulture kroz kritički osvrt na odnos između romskih skupina, kao i odnos većinskog stanovništva prema Romima te poziciju romske nacionalne manjine između asimilacije i potpune integracije u društvo.Rezultat i diskusija: Romi su najveća etnička manjina koju čini najmanje 10 do 12 milijuna ljudi, od kojih više od šest milijuna živi na području EU-a, pretežno u zemljama geografski smještenima na teritorijima središnjih i istočnih država članica te dominantno na području Balkana. Prikaz povijesti migracije Roma prema europskom teritoriju poslužio je kao podloga za kritički osvrt na postojeće spoznaje o teritorijalnim, kulturološkim i dijalektološkim razlikama između različitih grupa Roma kako u svijetu tako i između grupa koje žive na području Hrvatske – sve od njihova dolaska do današnjih dana, s naglaskom na povijest i proces naseljavanja Rome Bajaše kao najbrojnije skupine Roma koji dominantno žive na području Međimurske županije.Zaključak: Rromanipe ili romstvo pokazuje se kao integrirajući čimbenik identiteta i očuvanja opstojnosti Roma te najvažniji čimbenik kojim se Romi opiru asimilaciji i gubitku identiteta u odnosu na većinsko stanovništvo. Očuvanjem njihova identiteta, kulture i tradicije većinsko se stanovništvo obogaćuje kroz susret i dijalog s drugim, uz poštivanje različitosti i napredak i rast svih uključenih u taj susret.
Pelatihan Penggunaan Platform Digital sebagai Media Pembelajaran Daring di Masa Pandemi Covid19 untuk Sekolah Dasar
Authors: Indrayani Rini
Published: July 2022

Early in 2020, the world was shocked by a new type of influenza virus that was first identified in the city of Wuhan, Hubei province, China at the end of 2019. The international health organization, the World Health Organization (WHO), declared the urgency of health problems related to the SARS-Cov virus. 2 which later became known as COVID-19. Efforts to suppress the number of cases spread have been carried out in various ways, one of the efforts made by learning at all levels of schools to be transferred to the digital realm or known as online learning. Due to the lack of time allotted for preparation, a number of educators and students are deemed not ready to implement online type learning. . Therefore, various efforts are needed to help broaden the insight of educators and students for the smoothness of the online learning process such as training on the use of online learning digital platforms. The output of training in using this digital platform can be in the form of additional insights and experiences for training participants. Various types of platforms are introduced to teachers as trainees. However, from the survey results, the platform in the form of video conferencing was most in-demand with an interest percentage of 89.47%.
As habilitações especiais de Pedro Américo de Figueiredo e Melo para a cadeira de História das Belas Artes
Authors: Flor Flora Pereira
Published: July 2022

Em 12 de agosto de 1869, foi redigido na Academia Imperial de Belas Artes - AIBA uma minuta sobre o requerimento do professor de Desenho Figurado, Pedro Américo de Figueiredo e Melo, solicitando sua transferência para a cadeira de História das Belas Artes. O referido documento está salvaguardado sob o registro número 5807 no Arquivo Histórico da Escola de Belas Artes da Universidade Federal do Rio de Janeiro e constitui uma fonte importante no estudo da implementação do ensino de História da Arte na matriz curricular dos cursos Pintura, Escultura e Gravura de medalhas e pedras preciosas da Academia Imperial de Belas Artes.
Abordagens digitais para estudos de paleografia: desafios, atualidade, desdobramentos
Authors: Ackel Antonio
Published: July 2022

Este texto busca resgatar fatos históricos que levaram a Paleografia Digital a se consubstanciar como uma disciplina, com teorias e métodos, dentro do campo das Humanidades Digitais. Apresenta também o estado da arte dessa disciplina, apontando testes e hipóteses que foram propostos ao longo dos anos. Como exemplo de uso de ferramenta tecnológica computacional na análise paleográfica, apresenta-se uma possível técnica para que textos possam ser lidos sob rasuras, por meio do programa Sketchbook. Para o estudo de caso, utilizou-se um datiloscrito com intervenções, à mão, de sua autora, Lygia Fagundes Telles, ao revisar sua obra Seminário dos Ratos, lançada em 1977. Após a apresentação de resultados parciais que vêm sendo obtidos com essa técnica, são feitas algumas considerações finais sobre os desafios que a paleografia ainda tem pela frente.
Dinâmica do Livro na Universidade Medieval
Authors: Bellotto Heloísa Liberalli
Published: July 2022

Trata-se da Reedição e republicação de: BELLOTTO, Heloísa Liberalli. Dinâmica do livro na universidade medieval. Revista Comunicações e Artes, São Paulo, 11: 1-11, 1982. Como a Revista Comunicações e Artes foi extinta, essa nova versão do trabalho ora referenciado recebeu autorização da Diretoria da Escola de Comunicações e Artes da Universidade de São Paulo.
Apresentação - volume 7, Número 3 - Caminhos de uma ciência em constante renovação
Authors: Troitiño Sonia
Published: July 2022

LaborHistórico - Volume 7, número 3 (Caminhos da Paleografia).
Towards a Very Fast Feedforward Multilayer Neural Networks Training Algorithm
Authors: Bilski Jarosław , Kowalczyk Bartosz , Kisiel-Dorohinicki Marek , Siwocha Agnieszka , Żurada Jacek
Published: July 2022

**This paper presents a novel fast algorithm for feedforward neural networks training. It is based on the Recursive Least Squares (RLS) method commonly used for designing adaptive filters. Besides, it utilizes two techniques of linear algebra, namely the orthogonal transformation method, called the Givens Rotations (GR), and the QR decomposition, creating the GQR (symbolically we write GR + QR = GQR) procedure for solving the normal equations in the weight update process. In this paper, a novel approach to the GQR algorithm is presented. The main idea revolves around reducing the computational cost of a single rotation by eliminating the square root calculation and reducing the number of multiplications. The proposed modification is based on the scaled version of the Givens rotations, denoted as SGQR. This modification is expected to bring a significant training time reduction comparing to the classic GQR algorithm. The paper begins with the introduction and the classic Givens rotation description. Then, the scaled rotation and its usage in the QR decomposition is discussed. The main section of the article presents the neural network training algorithm which utilizes scaled Givens rotations and QR decomposition in the weight update process. Next, the experiment results of the proposed algorithm are presented and discussed. The experiment utilizes several benchmarks combined with neural networks of various topologies. It is shown that the proposed algorithm outperforms several other commonly used methods, including well known Adam optimizer.
Transcranial Duplex Ultrasonography Measurements Towards Identification of Blood Vessel Conditions: Artificial Cerebral Blood Flow in Pathologies
Authors: Leibuss Roberts , Posredņikova Olga , Pupkeviča Irina , Meidrops Kristiāns , Mackevičs Dāvis , Dekhtyar Yuri , Stradiņš Pēteris , Strīķe Eva
Published: July 2022

The aim of the study was to investigate how cerebral vasospasm, vasodilation and haemorrhage under artificial circulation conditions during cardiopulmonary bypass affect transcranial duplex ultrasonography measurements. A description of transcranial duplex ultrasonography and phantom development is provided. Measurements were made using a commercially available ultrasound system and cardiopulmonary bypass machine, water phantom and 32% glycerol solution with cornstarch. The experiments showed that the cerebral blood vessel condition in artificial circulation affects transcranial duplex ultrasonography measurement limit values. The most sensitive parameter for blood vessel condition changes is Peak Systolic Velocity (PSV) for which changes were observed in 100% of cases. The most insensitive was Time-Averaged Peak-Velocity (TAPV), and Minimum Diastolic Velocity (MDV) for which changes were observed in 83% of cases.
Exploring Younger Generation Sustainable Consumption in the Restaurant Industry
Authors: Băltescu Codruța Adina
Published: July 2022

Transilvania University of Brașov, Brașov, Romania.
CHANGES IN POST-PANDEMIC TRAVELLING BEHAVIOUR.
WHAT ARE THE EFFECTS OF THE COVID-19 PANDEMIC
ON STUDENTS' TRAVELLING INTERESTS?
Authors: Țicău Iulia Ruxandra , Shahrazad Hadad
Published: July 2022

The novel Coronavirus has led to devastating tragedies, creating a worldwide crisis upon economy and society.
Starting from people suffering from illness, deaths, unemployment up until poverty, the COVID-19 pandemic can
be considered one of the darkest periods of the world’s history. More broadly, the virus has transformed our
everyday lifestyles, inter-human interactions, dynamics of life and last but not least, perceptions upon travelling.
The tourism sector has been tremendously affected by the expansion of the virus, with hundreds of countries closing
borders, introduction of numerous travel restrictions and suspended flights. Restrictions, regulations and the fear
of not getting infected with the new virus have created chaos and considerably changed the way individuals
currently perceive travelling. Our study takes a demand-side perspective in order to determine changes in
travelling behaviours of individuals, by focusing on students, before and during the COVID-19 pandemic. The
study acts as a pilot test and aims at offering guidance for the tourism sector in elaborating and adapting to
changing demands on the market. For this purpose, we have collected primary data by distributing a survey among
students studying at Universities in Romania. Results have been analysed and compared with relevant literature
research. Findings reveal the importance of rate of infection, possible occurring restrictions and costs as being
critical when choosing travel destinations during pandemic. Conclusions demonstrate that there is a high need for
strong collaboration and cooperation between governments and tourism agencies and businesses. We propose
tourism organisations to direct their promotions upon relaxing and safe destinations, at a domestic level in a first
phase, followed by international alternatives. We consider that competition can take a backseat during these tough
periods and make room for collaborative behaviours and partnerships for the industry to survive.
SPACE TOURISM. A FUTURE SUSTAINABLE BUSINESS OR NOT?
Authors: Baciu Radu-George
Published: July 2022

Space tourism, which has recently come to the attention of society, has sparked controversy over the environmental
consequences of recreational space travel, which has become a lucrative business done by and for the super-rich. This
scientific paper investigates, through qualitative and quantitative research, the potential for the success and
sustainability of this industry. The interviewed tourism and aviation experts believe that space tourism deserves to be
developed in order to colonise other planets and make society responsible for the environmental issues, despite the
huge costs, which will be reduced, similar to the aviation trend, by technological advances. Also, the results of the
survey in which students participated, as future specialists in business and tourism, indicate an increased share of
those aware of the effects of carbon pollution and a percentage of over 30% of those who believe in the development
of space tourism, supported by economic benefits of offsetting environmental costs. The overall conclusion of the study
highlights technological progress as a mobilising factor in reducing carbon dioxide emissions from spacecraft and in
achieving the dream of sustainability of space travel, revealing space tourism as a resource that would benefit society
as a whole, scientifically and economically.
Estratégias de educação ambiental no enfrentamento à emergência climática
Authors: Eichenberger Jacqueline Carrilho , Moser Anderson , Campos Marília Toralles
Published: July 2022

O presente artigo apresenta um estudo de caso numa comunidade rural na região da Galiza, a partir do desenvolvimento de um projeto de educação ambiental, com vista a uma transição ecossocial de baixo carbono. Para o presente estudo de caso, foram coletadas narrativas com mulheres maiores de 65 anos, residentes na comunidade rural de Lavacolla. Com base na análise das narrativas, foi possível refletir sobre o modo como a emergência climática global se experiencia a nível local e comunitário e se interseta com desafios e experiências quotidianas das mulheres participantes. Memórias do passado são narradas e refletidas, de modo a fomentar a construção de perspectivas sobre futuros climáticos sustentáveis. Os resultados mostram o potencial de projetos assentes em atividades e dinâmicas que partem das necessidades e vivências das comunidades, com vista a processos de descarbonização de estilos de vida, fomentando a mudança individual e coletiva.
Recebido: 9/2/2022
Aceite: 13/6/2022
Ativismo ambiental em educação
Authors: Moreira Ana Maria , Antunes Nuno
Published: July 2022

Este estudo centrou-se no desenvolvimento de atividades de carácter pedagógico num agrupamento de escolas da região norte do país. Foram desenvolvidas em interdisciplinaridade, a partir do contexto escolar e social, em coautoria com os/as estudantes participantes, as seguintes atividades, que ocorreram em diferentes contextos: em sala de aula (projeto Escape Room - Home: Save our planet with Maths), em espaço exterior (Clube BIKE - Bike Is Key [to] Earth) e em ambiente híbrido (projeto: Blogue “Por falar em Matemática…”). Pretendemos aferir como as atividades promovidas podem: (i) fomentar o papel da educação como um consciente exercício de educação ambiental (EA); (ii) promover processos educativos ambientais; (iii) consciencializar alunos/as / cidadãs/os para a problemática ambiental. A metodologia seguida enquadra-se numa lógica de investigação-ação, sendo que a prática docente e a prática de investigação foram articuladas num processo cíclico que permitiu documentar, monitorizar e refletir sobre as atividades desenvolvidas. Optamos por aplicar um questionário aos/às alunos/as participantes, entrevistas às estruturas de liderança e, ainda, obtenção de dados com recurso à observação direta. Os resultados indicam que a educação assume um papel preponderante na promoção da EA e pode ter um efeito potenciador de ativismo ambiental, uma vez que os órgãos de gestão percecionam o valor das iniciativas pedagógicas mencionadas no aprofundamento do papel da escola na EA e os/as estudantes manifestaram elevados níveis de satisfação com a participação nas atividades desenvolvidas, revelando disposições para a mudança individual e avaliando as atividades como promotoras de consciência ambiental individual e coletiva.
 
Recebido: 5/2/2022
Aceite: 30/5/2022
Prototipe Konveyor Sistem Pemisah Barang Menggunakan Sensor Ultrasonik dan Sensor Load Cell
Authors: Indah Ira Puspa , Wildian Wildian
Published: July 2022

Telah dilakukan perancangan prototipe konveyor sistem pemisah barang berdasarkan tinggi dan massa yang menggunakan sensor ultrasonik dan sensor load cell. Â Perancangan konveyor dibuat sebagai pembawa dari barang yang akan dipisah. Konveyor terdiri dari motor DC yang dihubung pada driver L298N agar belt konveyor berputar dan motor servo-2 dan 3 sebagai pemisah barang. Pemisahan berdasarkan tinggi dan massa dari barang memanfaatkan teknologi Arduino Uno sebagai mikrokontroler, sensor ultrasonik, sensor load cell, modul HX711 dan LCD. Ketika barang di atas tempat penimbnag dan di bawah sensor ultrasonik maka tinggi dan massa barang tampil pada layar LCD. Selanjutnya, motor servo-1 akan mendorong barang keatas belt konveyor sehingga barang dapat dipisahkan oleh motor servo-2 dan 3. Hasil pengujian dengan barang menunjukkan motor servo-2 berputar 150o untuk barang yang dikategorikan kecil dengan tinggi â‰¤ 8 cm dan massa â‰¤ 45 g, sedangkan motor servo-3 berputar 150o untuk barang yang dikategorikan sedang dengan tinggi (9-12) cm dan massa dari (46-80) g. Apabila motor servo-2 dan 3 tidak bergerak maka barang akan dikategorikan besar dengan tinggi (13-20) cm dan massa (81-105) g.
Segmentasi Citra Mammogram Untuk Deteksi Dini Kanker Payudara Dengan Menggunakan Metode Otsu Thresholding
Authors: Maulida Atika , Nurhidayah Nurhidayah , Fendriani Yoza , Haryono Haryono
Published: July 2022

Kanker payudara merupakan kanker yang paling banyak terdiagnosa pada wanita diseluruh dunia. Kanker payudara menempati urutan kedua tertinggi sebagai penyebab kematian pada wanita. Deteksi dini pada kanker payudara salah satunya dapat melalui prosedur mammografi yang akan menghasilkan citra mammogram. Penelitian ini merupakan upaya untuk melakukan deteksi dan segmentasi dengan menggunakan teknik pemrosesan citra terhadap objek yang dicurigai sebagai lesi kanker payudara pada citra mammogram dengan menggunakan metode Otsu Thresholding. Hasil penelitian menunjukkan metode yang diajukan mampu melakukan deteksi dan segmentasi terhadap lesi kanker payudara dengan baik. Ekstraksi ciri dari objek dilakukan pada fitur tekstur citra dengan data yang digunakan adalah sebanyak 8 citra dengan menggunakan metode Gray Level Co-occurrence Matrix (GLCM). Dari pengujian diketahui bahwa semakin banyak perbedaan atau banyaknya jumlah keberagaman intensitas keabuan dalam citra, maka nilai dari ekstraksi fitur citra akan lebih baik dibandingkan citra yang memiliki jumlah keberagaman atau jumlah perbedaan intensitas keabuan yang sedikit.Segmentasi Citra Mammogram Untuk Deteksi Dini Kanker Payudara Dengan Menggunakan Metode Otsu Thresholding
Pengaruh Variasi Massa Gliserol Terhadap Sifat Mekanik Film Plastik Pati Umbi Talas Berpenguat Nano Serat Pinang
Authors: Hasanah Nurul , Mahyudin Alimin
Published: July 2022

Telah dilakukan penelitian mengenai pengaruh variasi massa gliserol terhadap sifat mekanik film plastik pati umbi talas berpenguat nano serat pinang. Variasi massa gliserol yaitu (0.5, 0.75, 1, 1.25 , 1.5) gram dan satu sampel tanpa pati. Sifat mekanik yang diujikan yaitu kuat tarik, elongasi, elastisitas, dan biodegradabilitas. Karakterisasi sampel meliputi PSA, FTIR, dan SEM. Pengujian PSA didapatkan ukuran nano serat sebesar 187 nm, 110 nm, dan 69 nm dengan distribusi ukuran partikel 25% , 50%, dan 75%. Hasil FTIR menunjukkan adanya gugus fungsi C=O dan C-O merupakan gugus fungsi hidrofilik yang mengindikasikan film plastik mampu terdegradasi. Pengujian SEM memperlihatkan adanya gumpalan pada permukaan film dikarenakan kurang homogennya larutan. Uji kuat tarik diperoleh nilai tertinggi 9,015 MPa dan nilai terendah sebesar 5,518 MPa, nilai ini telah memenuhi standar kuat tarik plastik biodegradable JIS 2-1702. Uji elongasi diperoleh nilai terendah 44,714% dan tertinggi 50,142%, nilai ini telah memenuhi SNI tentang elongasi plastik. Uji elastisitas diperoleh nilai tertinggi 17,797 MPa dan terendah sebesar 16,668 MPa. Nilai biodegradabilitas meningkat seiring dengan meningkatnya variasi massa gliserol.
Identifikasi Pencemaran Air Di Sekitar Tempat Pembuangan Akhir Sampah Tungkal Selatan Kota Pariaman
Authors: Khaira Husnul , Afdal Afdal
Published: July 2022

Telah dilakukan penelitian untuk mengidentifikasi pencemaran air berdasarkan nilai temperatur, pH, konduktivitas listrik, TDS, dan kandungan logam berat di sekitar tempat pembuangan akhir (TPA) sampah Tungkal Selatan Kota Pariaman. Pengambilan sampel dilakukan sebanyak sepuluh titik di sekitar TPA. Analisis tingkat pencemaran menggunakan metode Indeks Pencemaran air (IP). Hasil pengukuran menunjukkan sampel lindi memiliki nilai rata-rata temperatur 29,7 Â°C, pH 8,2, konduktivitas listrik 172,35 ÂµS/cm, TDS 1300,9 mg/l, kosentrasi logam berat Hg, Pb, dan Zn berturut-turut adalah 0,0065 mg/l, 0,0088 mg/l, 0,0556 mg/l. Secara umum lindi tidak mengalami pencemaran tinggi sehingga bisa dilepas ke sungai. Semua nilai parameter untuk sampel air sungai setelah melewati TPA lebih tinggi daripada sebelum melewati TPA. Hal ini menunjukkan bahwa lindi mempengaruhi kualitas air sungai. Sampel air sumur memiliki nilai rata-rata temperatur 27,5 Â°C, pH 6,05, konduktivitas listrik 84,58 ÂµS/cm, dan TDS 87,09 mg/l. Nilai parameter yang didapat tidak berbanding terbalik dengan jarak titik sampel terhadap TPA. Hal ini menunjukkan lindi tidak mempengaruhi kualitas air sumur yang berada di sekitar lokasi TPA. Semua sampel air sungai dan air sumur memiliki 1â‰¤IPâ‰¤5. Secara keseluruhan sampel air sungai dan air sumur dikategorikan tercemar ringan dengan IP rata-rata total 3,0621.Â
Rancang Bangun Alat Pemantau Biaya Pemakaian Energi Listrik Menggunakan Sensor PZEM-004T dan Aplikasi Blynk
Authors: Chairunnisa Indah , Wildian Wildian
Published: July 2022

Telah dirancang sebuah alat pemantau biaya pemakaian energi listrik menggunakan sensor PZEM-004T dan aplikasi Blynk. Alat ini dapat membantu masyarakat mengetahui besarnya biaya pemakaian energi listrik dalam rumah sehingga masyarakat dapat melakukan penghematan listrik. Sistem ini menggunakan sensor PZEM-004T sebagai pembaca nilai arus dan tegangan dan WeMos D1 Mini Pro sebagai pengendali utama yang akan memprogram nilai arus dan tegangan sehingga dapat diketahui energi dan biaya yang terpakai. Alat yang dirancang dapat menampilkan besar penggunaan energi listrik yang terpakai beserta biayanya secara realtime melalui LCD dan aplikasi Blynk yang ada pada smartphone. Pengujian dilakukan menggunakan beban berupa laptop, smartphone, kipas angin, dispenser, rice cooker, setrika, powerbank dan televisi. Hasil pengujian menunjukkan bahwa alat sudah dapat bekerja dengan baik dan dapat ditampilkan biaya pemakaian listrik pada LCD dan aplikasi Blynk. Sistem ini memiliki persentase error sebesar 0,1% untuk arus dan 0,004% untuk tegangan.
Rancang Bangun Pengukur Kadar Gula Darah Non-Invasive Berbasis NodeMCU ESP8266
Authors: Putri Suci Yulia , Firmawati Nini
Published: July 2022

Telah dilakukan perancangan alat ukur kadar gula darah non-invasive menggunakan mikrokontroler NodeMCU ESP8266. Pemeriksaan penyakit diabetes saat ini bergantung pada pemantauan konsentrasi glukosa darah dengan metode invasive, yaitu dengan cara menusuk jari atau lengan untuk mengambil sampel darah. Pengukuran kadar gula darah secara invasive ini tidak dapat diterapkan pada seluruh pasien, terutama pada pasien yang mengalami gangguan mental atau takut pada benda tajam. Tujuan penelitian ini adalah untuk menghasilkan suatu alat yang dapat mengukur kadar gula darah pasien diabetes tanpa melukai tubuh pasien tersebut. Tata laksana penelitian ini dimulai dari studi literatur, perancangan dan pengujian sistem perangkat keras, perancangan dan pengujian sistem perangkat lunak, perancangan rangkaian keseluruhan, perancangan bentuk fisik alat, pengujian LCD OLED, pengujian akhir prototipe dan pengumpulan data, serta analisis data. Modul NodeMCU ESP8266 digunakan sebagai pusat pemprosesan sinyal dan penghubung alat ke internet. Berdasarkan pengujian dan analisis, didapatkan hasil bahwa nilai intensitas cahaya yang diterima oleh sensor fotodioda yang menghasilkan nilai tegangan output yang dikonversi ke nilai ADC, akan mengalami perubahan seiring dengan perubahan nilai kadar gula darah. Hasil perhitungan persentase error pada pengukuran kadar gula darah ini adalah sebesar 5,06%. Alat ini hanya bisa digunakan sebagai alat skrining dan belum bisa digunakan sebagai alat ukur yang akurat pada bidang kesehatan.
Penentuan Kualitas Air Muara Sungai Batang Arau Melalui Pengujian Total Dissolved Solid (TDS), Total Suspended Solid (TSS), dan Kandungan Logam Berat
Authors: Ofiyen Charlie , Puryanti Dwi
Published: July 2022

Penelitian ini bertujuan untuk menentukan konsentrasi logam berat, suhu, pH, konduktivitas listrik, total padatan terlarut (TDS) dan total padatan tersuspensi (TSS) pada sampel air muara Sungai Batang Arau. Nilai konsentrasi logam berat diukur menggunakan alat inductively coupled plasma (ICP), suhu diukur menggunakan termometer, pH diukur menggunakan pH meter, konduktivitas listrik diukur menggunakan konduktiviti meter, TDS dan TSS ditentukan menggunakan metode gravimerti. Dari hasil penelitian diperoleh nilai rata-rata rata-rata suhu sebesar 28,52 â„ƒ. Nilai rata-rata pH sebesar 6,76. Nilai rata-rata konduktivitas listrik sebesar 176,43 ÂµS/cm. Nilai rata-rata TDS sebesar 1040,5 ppm. Berdasarkan PP. No. 82 Tahun 2001 nilai rata-rata TDS di muara Sungai batang Arau telah melebihi standar baku mutu air kelas II yaitu sebesar 1000 mg/l. Nilai rata-rata TSS sebesar 204,9 ppm, nilai rata-rata TSS juga telah melebihi baku mutu PP. No. 82 Tahun 2001 kelas II yaitu sebesar 50 mg/l. Nilai kosentrasi logam berat Cd, Cu, dan Hg di muara Sungai Batang Arau telah melebihi baku mutu yang ditetapkan PP. No. 82 Tahun 2001. Dari hasil yang didapatkan dapat disimpulkan bahwa kualitas air di muara Batang Arau telah terjadi pencemaran.Â This study aims to determine the concentration of heavy metals, temperature, pH, electrical conductivity, totally dissolved solids (TDS) and totally suspended solids (TSS) in the estuary samples of the Batang Arau River. The value of heavy metal concentration was measured using an inductively coupled plasma (ICP), temperature was measured using a thermometer, pH was measured using a pH meter, electrical conductivity was measured using a conductivity meter, TDS and TSS were determined using the gravimerity method. From the results of the study, the average value of the temperature was 28.52. The average value of pH is 6.76. The average value of electrical conductivity is 176.43 S/cm. The average value of TDS is 1040.5 ppm. Based on PP. No. 82 of 2001 the average TDS value at the estuary of the Batang Arau River has exceeded the class II water quality standard, which is 1000 mg/l. The average TSS value is 204.9 ppm, the TSS average value has also exceeded the PP quality standard. No. 82 of 2001 class II that is equal to 50 mg/l. The concentration values of Cd, Cu, and Hg heavy metals in the Batang Arau River estuary have exceeded the quality standards set by PP. No. 82 of 2001. From the results obtained, it can be concluded that the water quality in the Batang Arau estuary has been polluted.
Rancang Bangun Pembangkit Sumber Energi Listrik Berasis Piezoelektrik Pada Sepatu Untuk Pendaki Gunung
Authors: Alfraidila Fadil , Harmadi Harmadi , Rasyid Rahmad
Published: July 2022

Telah dirancang sebuah perangkat sumber pembangkit energi listrik berbasis piezoelektrik pada sepatu untuk pendaki gunung. Piezoelektrik digunakan untuk memperoleh energi listrik yang dihasilkan dari adanya tekanan. Energi listrik yang dihasilkan lalu disimpan pada baterai litium 3,7 V yang sebelumnya disearahkan dari arus AC (Alternating Current) ke arus DC (Direct Current) menggunakan dioda penyearah. Hasil tegangan input listrik kemudian ditampilkan pada LCD (Liquid Crystal Display) yang datanya diolah menggunakan mikrokontroler Arduino Uno melalui sensor tegangan. Alat ini mampu mengisi daya kebutuhan elektronik saat mendaki gunung seperti handphone/smartphone dan lampu penerangan. Pengujian dilakukan dengan menvariasikan kondisi medan pegunungan pada keadaan diam, berjalan, dan jalan mendaki. Alat ini mampu menghasilkan tegangan maksimal sebesar 22,4 V dan arus maksimal 18,4 mA saat jalan mendaki. Hasil dari penelitian ini menunjukkan bahwa semakin besar tekanan yang diberikan oleh kaki dari pendaki gunung, maka semakin besar pula tegangan dan arus yang dihasilkan.
Analisis Ketahanan Fisik Jamur Tiram oleh Paparan Medan Magnet Extremely Low Frequency (ELF) Intensitas 600 Î¼T dan 900 Î¼T
Authors: Yuniarta Eva , Sudarti Sudarti , Anggraeni FKA
Published: July 2022

Gelombang elektromagnetik Extremely Low Frequency merupakan salah satu jenis dari radiasi non ionizing karena gelombang ELF memiliki nilai frekuensi lebih kecil dari 300 Hz. Penelitian ini bertujuan untuk mengkaji pengaruh paparan medan magnet ELF terhadap nilai pH dan ketahanan fisik jamur tiram (Pleurotus ostreatus). Jenis penelitian ini merupakan penelitian eksperimen menggunakan desain penelitian rancangan acak lengkap (RAL). Jamur tiram putih digunakan sebagai sampel dalam penelitian ini kemudian dibagi menjadi 2 kelompok besar yaitu kelompok kontrol (suhu ruang) dan (suhu rendah) tanpa dipapar serta kelompok eksperimen yang dipapar medan magnet ELF intensitas 600 Î¼T dan 900 Î¼T selama 30 menit, 60 menit, dan 90 menit dengan jumlah sampel sebanyak 20 tangkai jamur tiram pada setiap kelompok. Data hasil penelitian diolah dengan teknik analisis statistik uji One Way Anova dan uji Kruskal Wallis menggunakan IBM SPSS Statistik 23. Berdasarkan hasil analisis data diketahui bahwa pemberian paparan medan magnet ELF berpengaruh terhadap perubahan nilai derajat keasaman (pH) dan ketahanan fisik jamur tiram dan dapat disimpulkan bahwa intensitas 900 Î¼T selama 60 menit efektif digunakan untuk menghambat perubahan nilai pH jamur tiram serta menghambat penurunan skor dan presentase ketahanan fisik pada jamur tiram.
Analisis Mikrotremor Menggunakan Metode Horizontal to Vertical Spectral Ratio di Jalur Kereta Api Kota Padang
Authors: Syarah Nadilla , Pohan Ahmad Fauzi
Published: July 2022

Getaran kereta api merupakan salah satu sumber mikrotremor. Getaran ini perlu dianalisis untuk mengetahui dampak terhadap lingkungan di sekitar jalur kereta api. Pengukuran mikrotremor telah dilakukan menggunakan metode horizontal to vertical spectral ratio (HVSR) di jalur kereta api Kota Padang. Tujuan penelitian ini adalah untuk mengetahui karakteristik geologi setempat dan tingkat getaran mekanik akibat kereta api pada daerah padat rumah penduduk di sekitar jalur kereta api Kota Padang. Pengukuran dilakukan di 5 titik dengan durasi perekaman 65 menit menggunakan geophone, data logger, dan laptop yang kemudian akan diolah menggunakan software Geopsy. Hasil analisis menunjukkan bahwa daerah penelitian memiliki jenis lapisan sedimen permukaan dengan ketebalan 30 meter atau lebih. Hal ini ditandai dengan nilai frekuensi dominan yang berkisar antara 0,68 Hz â€“ 1,57 Hz. Daerah penelitian memiliki nilai amplifikasi yang berkisar antara 0,9 â€“ 1,29. Getaran kereta api memiliki frekuensi dominan yang berkisar antara 1,24 Hz â€“ 12,24 Hz dan amplifikasi 0,80 â€“ 2,13. Nilai kecepatan partikel yang diperoleh dari nilai PVS berkisar antara 0,1254 mm/s â€“ 0,3158 mm/s. Daerah penelitian dapat dikategorikan aman dari getaran kereta api dikarenakan rendahnya nilai amplifikasi dan nilai PVS yang berada di bawah batas aman menurut SNI 7571:2010.
Pengaruh Kristalinitas terhadap Stabilitas Termal Komposit Termoplastis Berpengisi Silika Xerogel
Authors: Fauziyah Nur Aini , Perwitasari Dyah Suci , Wardhani Primasari Cahya , Fadly Teuku Andi
Published: July 2022

Penetian ini bertujuan untuk mengetahui pengaruh kristalinitas terhadap stabilitas termal komposit termoplastis dengan pengisis silika xerogel. Polimer yang digunakan adalah polietilena glikol (PEG 4000) yang merupakan polimer termoplastis. Silika xerogel diekstraksi melalui proses alkali fusion. Silika xerogel yang didapatkan menunjukkan fasa amorf melalui X-Ray Diffraction (XRD). Silika xerogel ditambahakan ke dalam PEG 4000 dengan komposisi yang bervariasi, yaitu, 0, 5, 10, dan 20%. Penambahan silika xerogel menurunkan tingkat kristalinitas komposit karena PEG murni merupakan material semikristalin. Melalui analisis termal menggunakan Thermogravimetric Analysis (TGA), pengaruh kristalinitas komposit tampak jelas pada daerah sebelum polimer mengalami transisi leleh. Namun, pada daerah dekomposisi (T>400Â°C), pengaruh kristalinitas pada komposit tidak ada lagi. Hasil ini sangat menarik dikarenakan massa dekomposisi akhir menunjukkan nilai yang sama dengan komposisi silika xerogel yang ditambahkan, misalnya pada penambahan 20%, massa yang tersisa setelah dekomposisi adalah 20,77982 %. Oleh karenanya, analisis kristalinitas sangat mendukung hasil analisis termal dengan TGA pada komposit.
Analisis Hindcasting Gelombang Terhadap Perubahan Garis Pantai di Perairan Pesisir Pantai Padang Menggunakan Data Angin Permukaan
Authors: Indriani Widi Satria , Pujiastuti Dwi , Ondara Koko
Published: July 2022

Penelitian ini bertujuan untuk menganalisis gelombang pecah dan mengetahui perubahan garis pantai di sepanjang Pantai Padang, Kecamatan Padang Barat, Kota Padang. Metode yang digunakan berdasarkan data angin di masa lampau (hindcasting) yaitu menggunakan data angin 10 tahun (2010-2019) yang diperoleh dari Stasiun Meteorologi Maritim Teluk Bayur untuk mendapatkan tinggi dan periode gelombang yang signifikan. Untuk mengetahui perubahan garis pantai yang terjadi digunakan metode tumpang susun (overlay) citra satelit Landsat 5 TM tahun 2011 dan Landsat 8 OLI/TIRS tahun 2019, kemudian dianalisis menggunakan metode Digital Shoreline Analysis System (DSAS) untuk menghitung laju perubahan garis Pantai Padang. Hasil penelitian menunjukkan gelombang di perairan Pantai Padang didominasi oleh gelombang dari arah Barat Daya dengan tinggi gelombang 1,58 m dan periode gelombang 5,27 s. Tinggi gelombang pecah yang diperoleh adalah 1,1 m dan pecah pada kedalaman 3 m dari bibr pantai. Gelombang pecah yang terjadi secara terus menerus menyebabkan garis Pantai Padang mengalami kemunduran (abrasi) dengan laju abrasi 3,50 m/tahun. Abrasi terbesar terletak di daerah Muaro Lasak, Purus. Penumpukan-penumpukan sedimen yang dibawa oleh gelombang dan kembali ke pantai menyebabkan terjadinya akresi (penumpukan sedimen) dengan laju akresi sebesar 3,89 m/tahun. Akresi terbesar terletak di belakang Hotel Pangeran Beach, Rimbo Kaluang.
Penentuan Konsentrasi Radionuklida 137Cs dalam Susu Sapi di Nagari Sungai Kamuyang Sumatera Barat
Authors: Asma Ul Husna Indah , Milvita Dian , Kusdiana Kusdiana
Published: July 2022

Telah dilakukan penentuan konsentrasi radionuklida 137Cs pada susu sapi di Nagari Sungai Kamuyang, Sumatera Barat. Penelitian ini bertujuan untuk menentukan konsentrasi radionuklida buatan 137Cs pada susu sapi yang ditinjau berdasarkan PERMENKES RI No. 1031 tahun 2011, serta menentukanÂ  konsentrasi radionuklida buatan 137Cs pada rumput dan tanah yang ditinjau berdasarkan PERKA BAPETEN No. 16 tahun 2012. Sampel yang diukur terdiri dari sampel susu sapi sebanyak 3 liter, rumput sebanyak 2 kg, dan tanah pada kedalaman 0-15 cm sebanyak 2 kg. Penelitian diawali dengan preparasi sampel, kemudian diukur selama 17 jam menggunakan spektrometer gamma yang sudah dikalibrasi. Hasil pengukuran menunjukkan bahwa radionuklida 137Cs hanya terdeteksi pada sampel tanah dengan konsentrasi 0,42 Â± 0,19 Bq/kg. Konsentrasi radionuklida 137Cs pada sampel tanah dan rumput berada di bawah batas maksimum yang ditetapkan PERKA BAPETEN No. 16 tahun 2012 sedangkan jika ditinjau berdasarkan PERMENKES RI No. 1031 tahun 2011 maka hasil pengukuran konsentrasi radionuklida 137Cs dalam susu sapi di Nagari Sungai Kamuyang berada di bawah batas maksimum konsentrasi 137Cs.