bluuebunny/crossref_metadata_2025 huggingface dataset:
EFFECT OF MODIFICATION WITH POLYETHER POLYOL AND LIQUID SILICON RUBBER ON THE MECHANICAL PROPERTIES OF EPOXY SYSTEM
Authors: Alsaadi Zainab , Alobad Zoalfokkar Kareem , Akraa Mohammed A.
Published: August 2024

Epoxy resins are widely used for their strength, chemical resistance, and adhesion, but they are naturally brittle. The objective of this study was to investigate the effects of the addition of a polyurethane (PU) base (polyol) and liquid silicone rubber (LSR (as toughening agents to the epoxy resin. This research focuses on developing a modified flexible epoxy resin by added the toughening agents to epoxy resin was evaluated in various weight ratios (3%, 6%, 9%, and 12%) with (1-methylethyl-1,1'-biphenyl, izoforon diamine) as a hardener. To evaluate the impact of strengthening materials, epoxy samples were tested before and after the addition the toughening agents above. Surprisingly, the mechanical properties exhibited significant improvement according to the results. In case of LSR/Epoxy, (tensile modulus, tensile strength, fracture toughness, and impact strength) were modified at 6wt% LSR. In case of PU/Epoxy, a mechanical property was modified depending on the addition percentage of PU. In conclusion, the 6wt% LSR is the best ratio to modified epoxy. In comparing to PU, each percentage modify a specific property, this difference take place because of the soft elastic flexible nature of PU.
Numerical solution of the heat equation
Authors: Stanley A. Omenai
Published: August 2024

Numerical solution of the heat equation using finite difference approximation was developed to determine the temperature distribution profile for cooling of a rectangular steel bar. Temperature distribution plots were made at characteristic time steps describing the heat distribution along the steel bar and ultimately depicting the time it takes for the steel bar to achieve isothermal equilibrium with the cooling medium.
A network intrusion prediction model using Bayesian network
Authors: Ijegwa David Acheme  , Adebanjo Adeshina Wasiu  , Glory Nosa Edegbe
Published: August 2024

Intrusion detection systems are increasingly becoming more and more useful in the fight against cyber threats. As businesses continue to transition into adopting information processing systems including cloud computing, there is a greater need for the development of safety measures to ensure the preservation of information against theft, unauthorized access and other cyber threats. Several articles in literature have reported the development of intrusion detection and prediction system using varying techniques. In this research work, a simple Bayesian model is presented. To build this model, the widely used dataset of NSL-KDD was used. Existing literature was relied on for the selection of the best features while the Max-Min Hill Climbing (MMHC) algorithm was used to define the Bayesian network structure. The model was then implemented using the Genie Bayesian Modelling software. Results of simulation, influence and scenario analysis established the efficacy of the model in predicting the likelihood of an intrusion in a network environment.
The level of risk of rice farming due to the flood disasters experienced by rice farmers on swamp Lebak lands in Pemulutan Subdistrict Ogan Ilir Regency
Authors: Muhammad Rizky Abdillah  , Muhammad Yamin  , Yunita
Published: August 2024

This study aims to determine the level of risk of rice farming experienced by rice farmers in lowland swamp land (lebak) in Pemulutan District, Ogan Ilir Regency. The research location was in two villages, namely Tanjung Pasir village and Pemulutan Ulu village with a total of 130 respondents (65 samples from each village). The results of this research show that the level is 39.36% based on Z score calculation, which is categorized as low (indicator <40%).
Endoscopic ultrasound-guided techniques for pancreatic diseases
Authors: Amália Cinthia Meneses do Rêgo  , Irami Araújo-Filho
Published: August 2024

Endoscopic Ultrasound (EUS) is a transformative technology in the field of gastroenterology, particularly in the management of pancreatic diseases. This review provides a comprehensive examination of the use of EUS in diagnosing and treating pancreatic conditions, highlighting its diagnostic precision and therapeutic potential. The efficacy of EUS depends significantly on the operator's expertise, which underscores the need for extensive training and the acquisition of experience. Technological advancements, such as high-definition imaging and enhanced needle guidance systems, have markedly improved the ability of EUS to differentiate between benign and malignant pancreatic lesions, making it an indispensable tool in clinical decision-making. This article discusses the critical aspects of procedural safety, emphasizing the importance of meticulous pre-procedural assessments and the strategic use of prophylactic antibiotics to minimize risks such as infection and pancreatitis. The review also points out the essential role of careful post-procedure monitoring in enhancing patient safety. The emerging integration of artificial intelligence with EUS promises to refine diagnostic accuracy further and expand this technique's therapeutic capabilities. By advancing our understanding and application of EUS, we can significantly improve outcomes for patients with pancreatic diseases. The continued evolution of EUS technology and methodology positions it as a cornerstone of minimally invasive gastroenterology, offering promising prospects for patient care in pancreatic pathologies.
Impact of racial representation in curriculum content on student identity and performance
Authors: Blessing Ngozi Iweuno  , Nkwocha Stephen Tochi  , Onyinyechi Esther Egwim  , Abel Omorotionmwan  , Philip Makinde
Published: August 2024

The issue of minority multicultural perspectives in curricula has emerged as a hot topic in the recent past. Since education is delivered with a more diverse student population, it is critical to review the effects of curriculum content on the development of learners’ identity, their place within the classroom, and achievement. This research study aims at establishing the role played by curriculum content on racial representation in students’ identity as well as achievement. Research conducted in this area has shown the importance of integration of the multicultural curriculum to cover racial and ethnic diversity for minority learners. Mainstream educational context can make students from marginalized groups feel as if they do not fit in since their experiences are not portrayed in academic settings. This lack of representation and more so the absence of role models of color in the materials have a way of influencing the self-perception and attitudes towards learning among colored students in a negative way. This research will explore how the inclusion of racially diverse perspectives in K-12 curricula influences students' racial identity development processes, self-esteem, trust in the educational system, and ultimately academic outcomes like test scores, grades, and retention rates. Special attention will be paid to the experiences of Black, Hispanic, and Indigenous students. The findings of this study aim to provide compelling evidence for reforming curricula to incorporate more racial diversity and cultural relevance, in order to foster equitable and empowering learning environments for all students. This study also seeks to better understand how curriculum representation impacts performance metrics at the student and school level. Recent policies pushing for more culturally responsive pedagogy claim increasing racial diversity in course materials can help close stubborn achievement gaps between White students and their peers from historically marginalized racial groups. However, critics argue the evidence supporting such links remains limited. This research aims to shed new light on this debate by directly measuring changes in test scores, grade point averages, dropout rates, and college attendance before and after the introduction of revised, more racially inclusive curricula in selected districts and charter schools across three states.
The complexity of childhood obesity: Factors, impacts and solutions
Authors: Felipe Torres Pereira  , Soraya Correa Domingues  , Maria Gisele dos Santos
Published: August 2024

Identify the main contributing factors to childhood obesity, focusing on genetic, behavioral, and environmental factors. Explore the consequences of childhood obesity, both in terms of physical health and psychological and social impact. Genetic predisposition plays a significant role in childhood obesity. Studies have shown that children of obese parents are more likely to become obese, indicating genetic inheritance as an important factor. Specific genes that regulate appetite, metabolism, and fat storage can influence a child's tendency to gain weight. In addition, biological factors such as hormonal dysfunctions and metabolic changes can also contribute to the development of obesity. The socioeconomic status of a family has a significant impact on the prevalence of childhood obesity. Low-income households often have limited access to healthy foods and are more likely to consume ultra-processed foods, which are cheaper and more accessible. Studies show that food insecurity is associated with increased risk of obesity, as families may opt for foods of low nutritional quality that are more cost-effective.
Recurrent case of pitted keratolysis
Authors: Juan Pablo Dominguez Enriquez  , Cristian David Cusco Cuzco
Published: August 2024

Pitted keratolysis is a disorder of the stratum corneum of the skin caused by gram-positive bacteria. We present the case of a 27-year-old male working in a resort, with recurrent episodes of macerated lesions, depressions, and irregular shapes affecting both soles of his feet.
Pengantar Redaksi
Authors: Admin Psycho Idea Admin
Published: August 2024

PENGANTAR REDAKSIAssalamu’alaikum Wr Wb             Puji syukur kepada Alloh SWT, akhirnya Jurnal Psycho Idea Volume 17 Nomor 2 Tahun 2019, dapat diterbitkan. Edisi ini  menjadi bukti semakin meningkatnya  apresiasi terhadap publikasi ilmiah bidang ilmu psikologi.  Kami selaku pengelola Jurnal Psycho Idea berusaha selalu melakukan pembenahan dan perbaikan agar Jurnal ini  dapat diterima oleh civitas akademika terutama yang berkecimpung didalam ilmu psikologi.  Pada volume ini,  Jurnal Psycho Idea  menghadirkan delapan artikel yang berisi isu-isu yang menarik dalam penelitian psikologi.            Artikel pertama, membahas tentang peran motivasi berprestasi dalam memediasi dukungan sosial dan keterlibatan siswa di sekolah. Hasil  penelitian menunjukan bahwa dukungan sosial, motivasi berprestasi, dan keterlibatan siswa di sekolah memiliki hubungan yang positif secara signifikan, sedangkan motibasi berprestasi tidak menjadi mediasi di antara dukungan sosial dan keterlibatan siswa di sekolah.               Artikel kedua tentang hubungan conscientiousness dan cyberloafing pada karyawan di mana hasil dari analisis data tersebut menunjukan hubungan yang negatif.Artikel ketiga. Kepercayaan diri ditinjau dari dukungan sosial pada penyandang tuna netra. Hasil penelitian tersebut menunjukan bahwa dukungan sosial berpengaruh pada kepercayaan diri penyandang tuna netra, di mana semakin tinggi dukungan sosiak yang mereka peroleh maka semakin tinggi pula keercayaan diri penyandang tuna netra.Artikel keempat, membahas pelatihan empathy character building untuk siswa sekolah dasar sebagai intervensi terhadap perilaku bullying. Hasil penelitian ini menunjukan ada penurunan perilaku bullying setelah diberikan pelatihan tersebut.            Artikel kelima, tentang hubungan keadilan organisasional dengan komitmen organisasional. Hasil penelitian menunjukan bahwa keadilan organisasional memiliki hubungan positif dengan komitmen organisasional.            Artikel keenam mengangkat tema peran depresi, kecemasan, dan stres terhadap tekanan darah pada lansia. Hasil menunjukan bahwa semakin tinggi tingkat depresi, kecemasan, dan stres lansia semakin tinggi tekanan darah.Artikel ketujuh membahas tentang adiksi pada smartphone ditinjau dari subjective well being, kecemasan sosial, dan materialisme pada mahasiswa. Hasil penelitian menunjukan subjective well being, kecemasan sosial, dan materialisme pada mahasiswa memberikan sumbangan efektif pada adiksi smartphone.Artikel kedelapan tentang mindfulness dan work engangement pada generasi Y. Hasil penelitian menunjukan bahwa mindfulness berhubungan positif terhadap work engangement            Kami berharap hadirnya Psycho Idea edisi Agustus 2019  ini memberikan manfaat dan bisa menginspirasi penelitian psikologi dari berbagai kajian.. Terima kasih. Wassalamu’alaikum Wr. Wb
Keterikatan Kerja Karyawan Swasta Di Masa Pandemi Covid-19: Peran Ketidakamanan Kerja dan Modal Psikologis
Authors: Iftadi Nisrina Hanun , Taufik Taufik
Published: August 2024

Pandemi covid-19 telah menyebabkan krisis di berbagai bidang kehidupan, terutama industri dan organisasi. Kondisi yang tidak pasti menyebabkan turunnya semangat karyawan dalam bekerja. Penelitian ini bertujuan menganalisis keterikatan kerja karyawan swasta di masa pandemi covid-19 ditinjau dari persepsi ketidakamanan kerja dan modal psikologis. Metode dalam penelitian ini menggunakan pendekatan kuantitatif dengan menggunakan kuesioner yang terdiri atas Utrecht Work Engagement Scale-9 (α= 0,948), skala job insecurity (α= 0,925), dan PsyCap Questionnaires (α= 0,936). Partisipan penelitian ini adalah 100 karyawan swasta yang bekerja di masa pandemi covid-19 yang dipilih dengan teknik convenience sampling. Analisis data penelitian yang dilakukan dengan menggunakan multiple regression analysis. Hasil analisis menunjukkan peran signifikan ketidakamanan kerja dan modal psikologis terhadap keterikatan kerja sebesar 36,7% (p<0,05). Hasil analisis ini menunjukkan bahwa ketidakamanan kerja dan modal psikologis secara bersama-sama dapat memprediksi keterikatan kerja pada karyawan.
The Differences in Adaptation Between Lowland and Highland Populations
Authors: Pranatami Dwimei Ayudewandari , Atiqah Indy Naurah , Mariska Refi
Published: August 2024

Indonesia is an archipelagic country with different characteristics of each island. Indonesian people face various challenges related to their geographical place of residence which can affect their body's adaptation. Apart from being influenced by race and ethnicity, habits and the outside environment greatly affect adaptation in humans. The three most striking areas that experience geographical differences in Indonesian territory are coastal communities, lowland communities and upland communities. Geographical conditions in fact provide differences in the special characteristics of each of its inhabitants. Not only related to physical development, but patterns of daily life can also be affected by differences in geographical conditions. Things that experience differences from the conditions of the population living in the highlands, lowlands and coastal areas include: The amount of hemoglobin in the blood, Food consumption patterns, Physical appearance such as height, skin color and chest shape, Prevalence of diabetes, Daily activity and work and Heart rate and lung capacity. The adaptation made by each resident in different types of geography is a necessity in order to be able to live without experiencing difficulties in carrying out daily activities. As for people in different geographies, they can still live with each other in different ages, but the general characteristics that exist will always be the same as places where they often carry out their daily activities.
Isolation and Characterization of Cellulolytic Bacteria from Soil around Chicken Coop
Authors: Anggriani Latusi , Alvionita Dewinta Nur , Yulistian Saldi , Hidayat Angger
Published: August 2024

Bacteria that utilize cellulose as a substrate and convert it into simpler compounds with the help of cellulase enzymes are known as cellulolytic bacteria. Cellulase enzymes are capable of breaking down cellulose into glucose. Cellulolytic bacteria are bacteria that can produce cellulase enzymes and are typically found in areas containing compost, soil rich in leaf litter, as well as agricultural and livestock soils. The aim of this study is to obtain bacterial isolates from soil around a chicken coop. Bacterial isolates from the soil around the chicken coop were cultured on selective CMC media. The successfully isolated bacteria were then purified to obtain single colonies. The obtained single colonies were characterized to determine the type of cellulolytic bacteria that were successfully isolated. Subsequently, testing was conducted to measure the cellulase enzyme activity produced by the obtained isolates. Four isolates of bacteria successfully grew on the selective CMC media. These four isolates were identified as gram-negative bacteria with a rod-shaped cell morphology. Enzyme activity testing was only performed on isolate LD 2, as it exhibited a clear zone indicating enzyme activity. The highest cellulase enzyme activity value was 0.0062 U/mL, with a 30-minute incubation time of the cell supernatant at 37°C, and a specific enzyme activity of 0.1891 U/mg. Based on the conducted research, only one isolate from the soil around the chicken coop exhibited enzyme activity
Diversity of Soil Macrofauna in Lembah Harau, West Sumatra
Authors: Hidayah Dwi Savitri Nur , Ihsan Mahya , Syafitri Dara Septia
Published: August 2024

Soil macrofauna constitutes fauna that inhabits both the soil surface and subsurface. Soil macrofauna plays a crucial role in ecosystems by safeguarding soil fertility through the decomposition of organic matter within the soil. Biodiversity is an essential aspect supporting the sustainability of living organisms on Earth. Macrofauna can serve as bioindicators of environmental quality, particularly soil conditions. The presence of soil macrofauna aids in the land recovery process by enhancing the physical, chemical, and biological properties of the soil. The objective of this research is to identify the diversity of soil macrofauna in varying environmental conditions. The employed methodology involves surveys and direct observations conducted in the Lembah Harau Forest Area in the Payakumbuh City of Limapuluh Kota Regency, West Sumatra Province. Sampling is conducted using monoliths in aquatic environments, canopy-covered areas, and open regions. The central portion of the monolith is excavated at depths of 10 cm, 20 cm, and 30 cm successively, followed by hand sorting. The diversity of soil macrofauna discovered falls into the moderate category (H’=2.77) with a macrofauna evenness of 0.726. These values are within the moderate range, indicating a relatively even distribution of soil macrofauna in the surveyed location. The predominant species identified is Ruticulitermes Hesperus.
A Study on the Content of Eco Enzyme from Pineapple Peel (Ananas comosus L.) and Watermelon (Citrullus lanatus)
Authors: Lestari Widya
Published: August 2024

Fruits widely consumed and cultivated by the Indonesian community include pineapple (Ananas comosus L.) and watermelon (Citrullus lanatus). The utilization of both fruits generates waste in the form of fruit peels. Pineapple and watermelon peels can be utilized as raw materials for eco enzyme production with the addition of water and molasses. Several functions of eco enzyme include serving as a floor cleaner, vegetable and fruit cleaner, insect repellent, and plant fertilizer. Additionally, it functions as a disinfectant due to its alcohol and acetic acid content. The objective of this research is to analyze the eco enzyme product using parameters such as pH, TDS, alcohol content, color, aroma, and final volume. The raw materials for eco enzyme are divided into three groups: 1) pineapple peels; 2) watermelon peels; 3) a mixture of pineapple and watermelon peels. The method involves mixing water, fruit peels, and molasses in a ratio of 10:3:1 and incubating for 30, 60, and 90 days. Based on the research results, the pH values range from 3.4 to 3.6. The TDS values increase for all raw materials except in the group of pineapple peel raw materials. The alcohol content in the eco enzyme product remains unchanged after incubation. The eco enzyme produced exhibits a cloudy brown color on the 90th day of incubation. The aroma produced is characteristic of fermentation, consistent with the concentration of raw materials used. The highest final volume of the eco enzyme product is observed on the 90th day of incubation.
PERSPEKTIF ANAK-ANAK TENTANG KEKERASAN DOMESTIK
Authors: Namirah Namirah
Published: August 2024

This study explores children's perceptions of domestic violence and its impact on their psychological and social health. Through in-depth interviews and observations, the study revealed that children exposed to domestic violence often experience deep trauma, fear, and prolonged anxiety. These children also show difficulty in establishing healthy social relationships and often develop reactive coping strategies. The results highlight the importance of comprehensive interventions and holistic support to help these children recover from their traumatic experiences. The study also emphasizes the need for collaboration between families, schools, and communities in creating a safe and supportive environment for the development of children affected by domestic violence.
Peran Ayah dalam Pengasuhan Anak di Keluarga Urban
Authors: Irawan Wanwan
Published: August 2024

This study explores the role of fathers in childcare in Jambi urban families, focusing on the challenges faced, the strategies implemented, and the impact of fathers' involvement on child development. Through in-depth interviews with several fathers and direct observation in the household, the study identified that open communication, positive rewards, skill teaching, and examples of good behavior are effective strategies that fathers use in parenting. However, fathers also face various obstacles such as work pressure and rigid social expectations regarding gender roles. This study shows that social support and policies that facilitate work-life balance are essential to increase fathers' involvement in parenting. The results of this study have implications for the development of policies and programs that support the role of fathers, with the aim of creating a more inclusive and supportive parenting environment for children and families in Jambi.
Pemenuhan Hak Anak dalam Keluarga dengan Orang Tua Tunggal di Jambi: Tantangan dan Strategi
Authors: Wulandari Tati
Published: August 2024

This study aims to examine the fulfillment of children's rights in single-parent families in Jambi, including the rights to education, health, protection, economy, and social welfare. This research uses a qualitative approach with in-depth interviews, participatory observation, and documentation methods. The results of the study show that single parents face various challenges, such as financial limitations, inadequate access to health services, and social stigma. Nonetheless, they implement various strategies to fulfill children's rights, such as seeking help from the community and school scholarship programs. Observations in the home and school environment show support from the school in the form of tutoring and scholarships. The discussion of the results of this study underlined the need to increase the socialization of assistance programs, cooperation between the government, schools, and communities, and the provision of more accessible health services. The implications of this study show the importance of more comprehensive interventions and better coordination to ensure the fulfillment of children's rights in single-parent families in Jambi.
ANALISIS DAMPAK LALU LINTAS AKIBAT AKTIFITAS PADA KAWASAN PASAR TURI BARU SURABAYA
Authors: Hapsari Yunita Tri , Sholichin Ibnu , Estikhamah Fithri
Published: August 2024

Terjadinya penambahan volume lalu lintas jalan telah mengakibatkan kemacetan lalu lintas pada ruas kawasan Pasar Turi Baru Surabaya. Kemacetan pada ruas jalan ini diakibatkan oleh keluar masuk aktifitas pengunjung pada Pasar Turi Baru Surabaya.  Pada penelitian ini mengenai analisis dampak lalu lintas dilakukan untuk mengetahui kinerja simpang, hambatan samping, tingkat pelayanan pada kawasan Pasar Turi Baru Surabaya. Penelitian ini menggunakan metode peritungan yang berpedoman  pada Pedoman Kapasitas Jalan Indonesia (PKJI) tahun 2014 tentang Simpang Alat Pemberi Isyarat Lalu Lintas (APILL). Penelitian ini dilakukan selama satu minggu pada jam-jam sibuk. Dari hasil perhitungan kinerja lalu lintas, didapatkan nilai derajat kejenuhan (DJ) Jalan Dupak Raya sebesar 0,91, Jalan Pasar Turi sebesar 0,93, Jalan Tembaan sebesar 0,89, Jalan Semarang sebesar 0,91. Sedangkan untuk derajat kejenuhan (DJ) simpang dengan APILL pada kondisi eksisting Jalan Dupak Raya sebesar 0,93 dan tundaan rata-rata (T) = 36,96 detik/skr, Jalan Pasar Turi sebesar 0,92 dan tundaan rata-rata (T) = 49,76 detik/skr, Jalan Tembaan sebesar 0,89 dan tundaan rata-rata (T) = 40,34 detik/skr, Jalan Semarang sebesar 0,93 dan tundaan rata-rata (T) = 49,02 detik/skr. Dari kinerja lalu lintas dan simpang dapat disimpulkan nilai derajat kejenuhan (DJ) tertinggi 0,93 dengan tingkat pelayanan (LOS) E, karena pada kawasan tersebut tergolong ramai dan pusat aktifitas pasar dan padatnya arus lalu lintas.
Analisis Korelasi Kerusakan Bangunan Terhadap Tingkat Kepuasan Pengguna Dengan Metode Customer Satisfaction Index (Studi Kasus Gedung F Universitas DR. Soetomo Surabaya)
Authors: Nikmatus Sa'adah  , Rizki Astri A  , Wisnu Abiarto N
Published: August 2024

Sejak pembangunan gedung F Universitas Dr. Soetomo Surabaya ini belum mengalami perubahan baik dari segi bentuk maupun sudut pandang lainnya. Berdasarkan pengamatan kondisi gedung saat ini, masih kurang diperhatikan dan usia bangunan yang sudah membutuhkan perawatan, pemeliharaan dan perbaikan pada kerusakan. Kualitas bangunan sangat mempengaruhi kepuasan pengguna bangunan karena kualitas bangunan yang baik dapat membuat penggunanya merasa nyaman berada di dalam gedung. Tujuan penelitian ini adalah menganalisis item yang mengalami kerusakan, menganalisis tingkat kepuasan pengguna dan menganalisis kondisi bangunan yang kurang baik. Metode yang dipakai pada penelitian ini yaitu metode kuantitatif dimana pengumpulan data dilakukan dengan cara menyebarkan survei kuesioner melalui google form kepada 135 responden yang terdiri dari Bapak/Ibu Dosen Fakultas Teknik dan Mahasiswa/Mahasiswi pengguna gedung F Universitas Dr. Soetomo Surabaya, selain dengan penyebaran kuesioner penelitian ini dilakukan dengan cara observasi langsung. Penelitian ini menggunakan metode customer satisfaction index yang bertujuan untuk mengetahui tingkat kepuasan pengguna gedung dan menggunakan bantuan software Smart-PLS untuk membantu pengolahan data yang dihasilkan dari kuesioner dengan uji validitas dan relibalititasnya. Hasil penelitian ini terdapat beberapa kerusakan diantaranya adalah kerusakan pada kolom, balok, pelat lantai, dinding, finishing, kusen kaca dan pintu, lantai dan plafon. Kerusakan pada penelitian ini mengacu pada klasifikasi kerusakan bangunan menurut (PUPR, 2021) yang dimana kerusakan keseluruhan pada dinding dikategorikan dengan kerusakan sangat ringan, kerusakan pada kolom dikategorikan dengan kerusakan sedang, kerusakan pada balok dikategorikan dengan kerusakan berat, kerusakan pada pelat lantai dikategorikan kerusakan berat, kerusakaan pada lantai dikategorikan kerusakan ringan, kerusakan pada plafon dikategorikan kerusakan sedang, dan untuk finishing dikategorikan kerusakan berat karena kerusakan finishing menyeluruh. Hasil penelitian tingkat kepuasan pengguna terhadap kondisi bangunan dengan metode customer satisfaction index (CSI) adalah 55,41% yang berarti pengguna bangunan cukup puas dengan kondisi bangunan sekarang ini. Selain itu, untuk hasil kondisi bangunan menurut sudut pandang responden yang kurang baik adalah kerusakan pada warna cat dinding, kondisi langit-langit, accessories pintu dan jendela, pintu dan jendela, kusen pintu dan jendela, dinding.
 
Kata Kunci: Kerusakan Bangunan, Kepuasan Pengguna, Customer Satisfaction Index, Smart-PLS
PENERAPAN KINERJA PROYEK KONSTRUKSI PADA Pembangunan Ruas Jalan dan Jembatan Tawang Ngalang Segmen IV menggunakan earned value concept
Authors: Kartika Widya , Buddewi Sukindrawati  , Diki Rohman
Published: August 2024

Pelaksanaan proyek konstruksi memerlukan suatu manajemen yang baik agar proyek dapat mencapai suatu tujuan yang telah direncanakan. Ketepatan biaya, waktu dan mutu sangat berpengaruh terhadap keberhasilan suatu proyek. Salah satu metode dalam pengendalian biaya dan waktu proyek konstruksi adalah metode konsep nilai hasil. Studi kasus pada proyek pembangunan Ruas Jalan dan Jembatan Tawang Ngalang Segmen IV. Metode penelitian menggunakan metode konsep nilai hasil yaitu metode yang digunakan untuk menghitung besarnya biaya menurut anggaran sesuai dengan pekerjaan yang telah diselesaikan atau dilaksanakan. Analisis kinerja pelaksanaan proyek yang ditinjau dari segi biaya dan waktu dengan menghitung besarnya BCWS, BCWP, dan ACWP. Analisis estimasi biaya dan waktu penyelesaian proyek konstruksi menghitung CPI to-go dan SPI to-go. Variabel yang akan diteliti adalah Cost Variance (CV), Schedule Variance (SV), Cost Performance Index (CPI), dan Schedule Performance Index (SPI). Hasil penelitian menunjukkan bahwa secara keseluruhan proyek pembangunan Ruas Jalan dan Jembatan Tawang Ngalang Segmen IV berjalan dengan baik dengan hasil SPI >1 menunjukan waktu yang lebih cepat dari rencana dan hasil CPI >1 menunjukkan biaya yang lebih hemat dari anggaran. Nilai SPI to-go yaiu 1.129 yang berarti bahwa proyek selesai lebih cepat dari rencana. Nilai CPI to-go yaitu 1.975 yang berarti bahwa biaya pelaksanaan proyek lebih rendah dibandingkan dengan anggaran rencana. Berdasarkan hasil evaluasi dan analisis data pelaksanaan proyek dengan deviasi positif atau lebih cepat 2,23 % dari jadwal rencana
Pemanfaatan Limbah Karbit Pada Campuran Beton Ringan Sebagai Bahan Tambah
Authors: ERDIANSYAHPUTRA B , SHARWANDA ASFARINA
Published: August 2024

Perkembangan beton ringan merupakan suatu teknologi yang sedang mengalami perkembangan pesat, Beton ringan digunakan untuk berbagai keperluan, termasuk dinding bangunan, insulasi, atap, dan pengisi pondasi. Karena kepadatannya yang rendah, konsumsi energi yang rendah, beton ringan dapat menggantikan material beton asli, sehingga mendorong pengembangan rendah karbon. Penelitian ini bertujuan untuk mengidentifikasi dampak dari penambahan limbah karbit pada komposisi campuran beton, serta untuk menemukan campuran beton yang memberikan hasil yang optimal. Metode yang dilakukan berupa penentuan bahan dan komposisi campuran yang akan digunakan, variasi komposisi campuran dengan persentase limbah karbit 0-35 porsen dengan perbandingan 1Pc : 6Pasir dan satu variasi akan dibuatkan 3 benda uji serta pada umur 7, 14, 28 hari dilakukan pemeriksaan. Pembuatan sampel dengan membuat benda uji beton ringan dengan variasi komposisi yang telah ditentukan. benda uji berupa kubus 5x5x5 cm. Hasil penelitian nenunjukan bahwa kuat tekan rerata beton dari campuran limbah karbit variasi 0%,15%, 20%, 25%, 30% dan 35% pada umur 28 hari berturut-turut adalah sebesar 6.35 MPa, 5.50  Mpa, 5.45 Mpa, 5.32 Mpa, 4.78 Mpa.dan berat isi berturut-turut sebesar 1872.12 kg/m3, 1865.76 kg/m3, 1862.31 kg/m3, 1853.42 kg/m3, 1840. 24 kg/m3, dan 1808. 26 kg/m3. Campuran beton dari komposisi 1Pc: 6Psr dengan penambahan limbah karbit menunjukkan bahwa kuat tekan optimal beton berumur 28 hari dengan 15% limbah karbida sebesar 5.50 MPa).
Numerical Investigation of Steel Section Remaining Tensile Capacity During SMAW Welding
Authors: Mushthofa Malik
Published: August 2024

This study investigates a method for calculating the remaining axial tension capacity of thin steel sections during Shielded Metal Arc Welding (SMAW) under load.  This necessitates a method to address situations where welding operations must be performed on structures already experiencing stress. Thin sections are particularly susceptible to the elevated temperatures associated with welding. To address this challenge, simulations were utilized to model the effect of the welding heat on thin sections. The simulations considered the temperature rise experienced by each segment within the section. This rise led to a reduction in yield strength, ultimate strength, and elastic modulus for each segment. Subsequently, the partial tension capacity for each segment was calculated based on its area and the reduced strength properties. Finally, the remaining axial tension capacity was determined by summing the tension capacities of all segments. The results revealed a noteworthy correlation between welding parameters and the remaining tension capacity. Higher welding currents were associated with a greater loss of tension capacity, while faster welding speeds resulted in minimizing this loss. The scenario employing the lowest welding current and highest welding speed yielded the most favorable outcome, with the remaining tension capacity reaching 76%, 85%, and 89% for sections of 40.40.4, 50.50.5, and 60.60.6, respectively. Conversely, employing the highest welding current and slowest welding speed significantly reduced the remaining axial tension capacity until there were only 28%, 50%, and 66% left for the respective sections.
Analisis Faktor Keamanan Pada Permodelan Timbunan Yang Diperkuat Geogrid Di Atas Tanah Lempung Lunak
Authors: Muzaidi Irwandy , Anggarini Elia , Hardiani Dyah Pradhitya , Sriardi Doni
Published: August 2024

Timbunan yang dibangun di atas tanah lunak memiliki kecenderungan mengalami kegagalan oada tanah dasarnya (bearing failure). Hal tersebut diakibatkan tanah lunak mempunyai daya dukung yang rendah untuk memikul beban konstruksi. Apabila akan dibangun timbunan yang harus selesai dalam waktu yang relative cepat dan harus ditimbun di atas tanah lunak, dapat di atasi dengan melakukan perkuatan tanah menggunakan bahan geogrid sehingga meningkatkan daya dukung tanah lunak (bearing capacity) dan stabilitas timbunan. Analisa menggunakan metode elemen hingga dengan bantuan perangkat lunak PLAXIS untuk mencari nilai faktor keamanan, deformasi, dan perubahan tegangan pada timbunan yang dibangun di atas tanah lunak yang diperkuat geogrid. Dari penelitian ini didapatkan bahwa Pemodelan timbunan 2 tanpa geogrid mendapatkan nilai sf 1,0668 dan menggunakan geogrid mendapatkan nilai sf 1,3349. Faktor keamanan tanah timbunan 2 berada di atas 1,25 yang berarti kelongsoran jarang terjadi meski tanpa geogrid atau pakai geogrid
Analisis Pengaruh Suhu Terhadap Daya Output pada Panel Surya Monocrystalline dan Polycrystalline 50 Wp
Authors: Atikah Nur , Pramono Jati Budi , Nugroho Dedi
Published: August 2024

Ada 2 jenis panel surya yaitu jenis monocrystalline dan jenis polycrystalline. Permasalahan dalam panel surya adalah perbedaan pengaruh suhu terhadap efisiensi dan karakteristik dalam konversi energi daya output pada panel surya monocrystalline dan polycrystalline. Untuk mengetahui perbedaannya maka dilakukan pengukuran produksi energi pada PV monocrystalline 50W dan polycrystalline 50W masing-masing dengan cara didinginkan dan tidak didinginkan dengan air, untuk mempertahankan suhu menjadi normal. Paper ini membahas tentang pengaruh suhu terhadap daya output pada panel surya monocrystalline dan polycristaline. Tujuannya adalah dengan menurunkan suhu pada panel surya akan menghasilkan efisiensi yang lebih tinggi. Metode yang digunakan dengan metode air pendingin dan tanpa air pendingin. Parameter yang digunakan dengan metode adalah suhu permukaan panel, sudut terhadap posisi matahari, tegangan, arus dan daya output pada panel, pengambilan data dilakukan dari jam 07.00-17.00 WIB, dengan waktu pengukuran diambil 4 kali setiap 30 menit. Hasil dari penelitiann ini adalah pada puncak tertinggi output daya panel di jam 12.00 WIB, dengan hasil tertinggi pada panel surya monocrystalline. Bahwa ketika panel surya dengan air pendingin didapat hasil lebih efisien dan didapat hasil pada panel surya monocrystalline lebih bagus dibandingkan polycrystalline. Dari hasil penelitian didapat hasil yang terbaik adalah pada saat panel surya monocrystalline dengan air pendingin pada jam 12.00 WIB dengan suhu 26 °C, arus 1,69A, tegangan 18,8V, dan daya 31,772W. Hasil yang kedua panel surya monocrystalline tanpa air pendingin pada jam 12.00 WIB dengan suhu 50 °C, arus 1,67A, tegangan 16,9V, dan daya 28,223 W. Hasil yang ketiga panel surya polycrystalline dengan air pendingin pada jam 11.30 WIB dengan suhu 30 °C, arus 1,56A, tegangan 16,5V, dan daya 25,74 W. Hasil yang empat panel surya polycrystlaline tanpa air pendingin pada jam 12.00 WIB dengan suhu 52 °C, arus 1,62A, tegangan 15,4V, dan daya 24,948W.
Kata kunci: Monocrystalline, polycrystalline, Tegangan, Arus, Suhu, Daya.
Evaluasi Sistem Proteksi Petir Eksternal pada Bangunan Pusat Perbelanjaan Studi Kasus Gedung XYZ
Authors: Mahira Athaya , Widyanto Aji Nur , Husnayain Faiz , Fitri Ismi Rosyiana
Published: August 2024

Sustainable Development Goals (SDGs) adalah 17 tujuan global yang disusun oleh Perserikatan Bangsa-Bangsa untuk mengatasi berbagai tantangan global seperti kemiskinan, degradasi lingkungan, perdamaian, dan perubahan iklim. Salah satu tujuannya adalah poin 11, "sustainable cities and communities," yang bertujuan membuat kota dan pemukiman manusia inklusif, aman, tangguh, dan berkelanjutan. Indonesia, dengan iklim tropisnya, rentan terhadap hujan petir yang bisa menyebabkan kerusakan elektronik, cedera, kematian, dan kebakaran. Dengan Indeks Kerawanan Petir (IKL) 45%, Jakarta adalah salah satu kota dengan risiko tinggi terhadap petir, sehingga penting untuk mengevaluasi sistem proteksi petir pada bangunan perkotaan. Salah satu bangunan yang banyak di Jakarta merupakan bangunan pusat perbelanjaan. Penelitian ini menganalisis risiko pada salah satu bangunan pusat perbelanjaan di Jakarta, Gedung XYZ, yang dilakukan berdasarkan standar nasional dan internasional. Sistem proteksi petir eksternal yang terpasang adalah Early Streamer Emission (ESE). Evaluasi dilakukan berdasarkan standar NF C 17-102 dengan fokus pada terminal udara, konduktor penyalur, dan sistem pentanahan. Empat skenario perbaikan area proteksi terminal udara ditawarkan: penggeseran, penambahan, penggantian batang penangkal, dan aplikasi sistem konvensional. Perbaikan sistem grounding melibatkan pemasangan ground ring electrode atau penambahan elektroda pentanahan di setiap sistem terminasi tanah.
Sıfır Atık Uygulaması İçin Gıda Atıklarından Takviye Kuru Kedi Maması Üretimi
Authors: Şahin Muhammed Emin , Yiğit Rukiye , Altay Filiz
Published: August 2024

Gıdalar, üretim, taşıma ve tüketim sürecinin çeşitli aşamalarında atık olarak israf edilmekte ve bunların bir kısmı geri dönüştürülebilir olmalarına rağmen çeşitli sebeplerle geri kazandırılamamaktadır. Buna ilaveten kabuk, posa, öz suyu, işlem sonrası oluşan sular, çekirdek gibi kısımlar tüketilemediği için kaçınılmaz atıklar olarak ortaya çıkmakta olup israf nedeniyle değil kullanım alanı bulunamadığı için atık olmaktadır. Bu atıkların değerlendirilip farklı amaçlarla kullanıma hazır hale getirilmeleri mümkün iken israf ediliyor olması hem ekonomik hem de çevresel ve toplumsal sorunlara yol açmaktadır. Bu çalışma ile hem israf hem de kaçınılmaz olarak oluşan gıda atıklarından sıfır atık uygulaması kapsamında takviye kuru kedi maması üretilmesi amaçlanmıştır. Bunun için ekmek, portakal kabuğu, yumurta kabuğu, kemik suyu ve peynir altı suyu atıkları ile ürüne aroma katması ve mama hamurunun reolojisine katkıda bulunması amacıyla kemik suyu bulyonu kullanılarak takviye kuru kedi maması geliştirilmiştir. Atık maddelerden hazırlanan mama hamuru, koşulların ön denemelerle optimize edilmesinden sonra mikrodalgada 180 W gücünde 2 dk 25 sn süreyle kurutulmuştur. Elde edilen kuru mamanın nem içeriği %4,36 ± 0,06 olarak tespit edilmiştir. Ayrıca, teorik olarak yapılan hesaplamalara göre takviye kuru kedi maması 100 g’da %14,75 protein, %12,72 yağ, %64,95 karbonhidrat, %3,21 kül ile %3,08 oranında kalsiyum içermekte olup 447,626 kcal enerji değerine sahiptir.
Surface damage and particle ejection during irradiating vanadium with pulse flows of ions and plasma in the Plasma Focus device
Authors: Kolokoltsev V. N. ,   Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences, Maslyaev S. A. , Pimenov V. N. , Demin A. S. , Morozov E. V. , Epifanov N. A. , Borovitskaya I. V. , Demina E. V. , Sasinovskaya I. P. , Gaidar A. I. ,   Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences,   Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences,   Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences,   Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences,   Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences,   Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences,   Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences,   Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences,   Scientific Research Institute of Advanced Materials and Technologies
Published: August 2024

The damage to the vanadium surface and the ejection of microdroplets from the surface of vanadium into the vacuum chamber of the Plasma Focus device “Vikhr” under the influence of pulsed flows of deuterium ions and deuterium plasma with a power density of ~ 107 – 108 W/cm2 has been studied. It is shown that, as a result of pulsed heating, a liquid film is formed on the surface of vanadium. Under the action of a plasma flow moving parallel to the surface at a high speed, the Kelvin — Helmholtz instability arises, which leads to the formation of waves on the melt film. Under the influence of the plasma flow and powerful acoustic pulses that occur during pulsed irradiation of the sample, micro-droplets of liquid vanadium break off and transfer them to the surface of the copper screen-collector. The possible influence of such processes on the operation of thermonuclear fusion facilities is noted.
High temperature gas and salt corrosion of nickel alloy
Authors: Poilov V. Z. ,   Perm National Research Polytechnic University (PNRPU), Skovorodnikov P. V. , Saulin D. V. , Kazantsev A. L. , Puzanov A. I. ,   Perm National Research Polytechnic University (PNRPU),   Perm National Research Polytechnic University (PNRPU),   Perm National Research Polytechnic University (PNRPU),   Joint Stock Company “UEC-Aviadvigatel”
Published: August 2024

The article presents the results of high-temperature gas and salt corrosion of a heat-resistant nickel alloy on an automated installation at temperatures of 750, 850 °C, a gas flow velocity of 270 m/s and the supply of synthetic sea salt or a mixture salts of Na2SO4 – NaCl (at ratio 3:1) as corrosive-active agents. It has been established that with an increase in the number of heating/cooling cycles and the temperature of corrosion tests the nickel alloy damage increases. As a result of corrosion tests when supplying an aqueous solution of synthetic sea salt and at temperature of 750 °C was established that on the surface sample of the nickel alloy to formation of micrograined layers of magnesium oxides, which are products of thermohydrolysis of MgCl2. When the test temperature increases to 850 °C the process of thermohydrolysis of sea salt components is accompanied by the formation of oxide deposits with an abnormally high cobalt content. The increase in cobalt content in oxide deposits is caused by the action of the sea salt component NaCl. It has been established that a mixture salts of Na2SO4 and NaCl has the greatest negative effect on the alloy than salt corrosion caused by the action of synthetic sea salt. At the same time the areas of intense corrosion were observed on the alloy surface and thinning-out of the sample working part due to spalling of brittle oxide deposits.
La presunción de inocencia como regla de tratamiento estético
Authors: Muyo Bussac Pablo
Published: August 2024

En este artículo se estudia lo que denominamos el derecho a la presunción de inocencia como regla de tratamiento estético, producto de la acción pretoriana del TEDH y de los artículos 4 y 5 de la Directiva (UE) 2016/343 de 9 de marzo de 2016, según el cual toda persona física o jurídica que sea o haya sido sospechosa o acusada de haber cometido un hecho delictivo deberá ser tratada, reputada y mostrada por las autoridades públicas ante el público en general, en el proceso penal del cual sea sujeto pasivo, así como en cualquier otro proceso judicial de cualquier orden jurisdiccional, procedimiento administrativo o comisión parlamentaria, de tal forma que no se sugiera que es culpable de dicho delito mientras no se haya establecido dicha culpabilidad mediante una sentencia firme de condena. En primer lugar, se pondrán de relieve tres riesgos asociados al fenómeno de la imputación a los que pretende hacer frente este derecho y que obligan a repensar el fenómeno del honor y la reputación del encausado, la imparcialidad judicial y el monopolio jurisdiccional del ius puniendi desde la óptica del derecho a la presunción de inocencia. A continuación, se propondrá una definición circunstanciada del derecho y de las correlativas obligaciones exigibles a los poderes públicos en nuestro ordenamiento vigente. Posteriormente, se propondrá un modelo posible y vertebrado de garantías procesales para el tratamiento de las infracciones de este derecho dentro del proceso.
La asistencia inefectiva del letrado en el proceso penal
Authors: Rocha García Alberto
Published: August 2024

El Tribunal Europeo de Derechos Humanos y el Tribunal Constitucional garantizan la efectividad de la defensa letrada de oficio, pero no ocurre lo mismo cuando el abogado es de designación particular. El trabajo estudia los fundamentos de tal protección a la luz de los derechos de carácter procesal recogidos tanto en el CEDH como en la Constitución, con el fin de dar respuesta a si la distinción es legítima. El asunto tiene una importancia clave en el ámbito del proceso penal, dado que la naturaleza de sus consecuencias hace necesario extremar las garantías procesales y puesto que en él es casi siempre preceptiva la asistencia letrada.
Desmistificando um Tabu
Authors: Ferreira de Souza Daniel , Reis Irigaray Hélio Arthur
Published: August 2024

O suicídio é um fenômeno cada vez mais comum entre os policiais militares do estado do Rio de janeiro. Para tentar mitigar a sua ação e os seus efeitos, é imperioso entender os principais fatores e peculiaridades relacionados ao suicídio consumado e tentado de policiais militares da ativa da Polícia Militar do Estado do Rio de Janeiro (PMERJ). Buscando esse objetivo, esta pesquisa empírica, com inspiração etnográfica, dado que o pesquisador faz parte da corporação, é um estudo aprofundado e pouco explorado a respeito do tema. Para alcançar o objetivo central da pesquisa, foram analisados dados estatísticos a respeito do fenômeno do suicídio na PMERJ, bem como foram realizadas entrevistas com policiais militares envolvidos em casos de suicídio de maneira direta ou indireta. Os resultados obtidos apontam para uma multiplicidade de questões, nomeadamente, o cotidiano do ofício em si, problemas psicológicos, familiares, bem como disciplinares dentro da corporação. O campo revela que o suicídio é um tabu negligenciado na polícia militar fluminense e que os policiais militares do estado não estão capacitados a detectar os sinais de um potencial suicida. A partir dos resultados desta pesquisa, observa-se a necessidade de que sejam realizados investimentos e uma maior atenção à saúde mental dos policiais militares, assim como maiores investimentos e atenção à capacitação dos policiais PMERJ, quanto à identificação de sinais a respeito do suicídio e das doenças de cunho psicoemocional.