bluuebunny/crossref_metadata_2025 huggingface dataset:
Signal detection for pediatric patient deterioration in simulation with nursing students : a mixed methods study
Authors:   , Zimpelman Leslie Turner
Published: October 2023

When nurses delay or fail to detect the signals of clinically significant changes during the early stages of disease complication or patient deterioration, it is known as a failure to rescue (FTR). Pediatric patients in the hospital are at risk of being harmed or dying due to FTR. Pediatric patient deterioration detection poses a different challenge because pediatric patients physiologically respond differently from adults. Student nurses are especially challenged in detecting pediatric patient deterioration because adult illness is the primary focus of nursing education. To assess and understand nursing students' pediatric deterioration detection performance, an explanatory sequential mixed method study was conducted with second-semester senior baccalaureate nursing students (n=21). A conceptual framework incorporating concepts from Ericsson et al.'s (1993) Deliberate Practice Theory and Despins et al.'s (2010) Patient Risk Detection Theory guided the study The group had a low sensitivity d' = 1.19 (SD 0.85) to signals of pediatric deterioration and an increased tendency c = -0.03 (SD 0.66) to decide, "Yes, this stimulus is a signal." vital sign type did not significantly affect detection. Student responses were influenced by Nursing School & Life Experiences, Self-Reflection with sub-themes Reflection on the Patient's Status and Reflection of own Abilities and Knowledge Needs, Responder Bias with sub-themes of Going to See the Patient and Not Going to See the Patient, and Sensitivity to Signals. Differences in detection performance corresponded with differences in influencing factors. More research is needed to provide a framework for the methods to improve nursing education for pediatric patient care.
Factors affecting the success and failure of agribusinesses in the Accra and Kumasi Metropoles in Ghana : an empirical study
Authors:   , Appiagyei Jeffrey Boakye
Published: October 2023

Ghana's agricultural sector remains a significant contributor to the economy. Moreover, agricultural entrepreneurs contribute positively to the economy of Ghana through job creation, tax revenues, and foreign exchange earnings. Nevertheless, in the agriculture sector, to wit, agricultural entrepreneurs are underperforming below their potential. This study sought to understand the factors that influence the success or failure of agribusinesses in the Accra and Kumasi Metropoles in Ghana. A qualitative method approach was employed to gather data from agricultural entrepreneurs in the study areas. Findings from this study showed that the success of agribusinesses in the study area is not necessarily based on the economic performance of the agribusiness, but rather on social factors -- that is, the human capital and personal qualities such as the technical skills, communication, and leadership skills of the entrepreneur, teamwork, customer relationship management skills and the attitudes of the employees such as commitment and discipline towards work. Meanwhile, this study associated the failure of agribusinesses primarily with economic factors, such as access to finance, adequate capital, and the pricing strategies of the business. Therefore, the study recommends that agribusinesses should consider the soft skills of candidates before hiring them to fill roles. Additionally, it is recommended that agribusinesses offer on-the-job training to improve the skills and knowledge of their employees. Furthermore, this study recommends that agribusinesses should take advantage of the Ghana Incentive-based Risk-sharing System for Agricultural Lending (GIRSAL), to enhance their chances of receiving agricultural finance from commercial banking institutions.
Demystifying the private sector : the use of publicly accessible records to report on private equity firms
Authors:   , Dereuck Kelly Lee
Published: October 2023

The purpose of this research is to provide journalists with the tools necessary to report on private equity firms, a notoriously opaque sector of the economy. Private equity firms exert a large amount of influence on the U.S. and global economy, but often keep information about themselves closely guarded. To conduct this research, seven semi-structured interviews were conducted with business and investigative journalists who have experience covering private equity. Additionally, information from an expert panel of journalists was also used to uncover additional information about private equity firms and how reporters can find information about them. This research uncovered a multitude of methods for uncovering information on private equity firms, thus giving journalists the tools to hold power to account and fulfill the watchdog role of the press. This research was conducted through the lens of political economy theory, which studies the relationships between individuals, governments and public policy, as well as the leverage that the private sector holds over public policy.
Modeling chronic wasting disease using Gaussian Process Boosting
Authors:   , Emanuel Joseph Alexander
Published: October 2023

Chronic Wasting Disease (CWD) is a fatal neurological condition that affects cervids (white tail deer, elk, mule deer, etc.). Veterinary epidemiologists at the state and federal level are interested in methods to accurately predict the presence of CWD in free-range cervids, and to provide inferences about how location and other environmental factors could affect the spread of CWD. The data for this project was provided by Dr. Ram Raghavan at the University of Missouri School of Veterinary Medicine and was originally collected by researchers in Kansas. Each observation notes the presence of CWD in the cervid carcass along with the coordinates and certain soil measurements from the locations where hunters harvested them. Understanding the spread of CWD is key, since government officials, scholars, and farmers who are in the business of captive breeding are interested in developing methods to contain it geographically, eradicate it, and ultimately preserve the health of existing herds. To this purpose, machine learning models, such as gradient boosting, offer flexibility and predictive accuracy, but lack interpretability. in order to make inferences regarding the features, we use SHapley Additive exPlanations (SHAP), which quantifies the influence of each feature on predictions. Spatial dependence between locations is not accounted for with gradient boosting, but can be modeled with Gaussian Processes. In this project, we use a recently developed spatial modeling method known as Gaussian Process Boosting, which preserves the flexibility and accuracy of gradient boosting while capturing spatial random effects with Gaussian Processes. Results show an 87.5 percent prediction accuracy on a binary response, and that the prediction contributions from the spatial random effects helped accuracy. SHAP values allowed for useful inferences to be made regarding the features.
The systemic and domestic determinants of antidumping trade remedies
Authors:   , Coleman Tyler
Published: October 2023

[EMBARGOED UNTIL 8/1/2024] Why do firms demand antidumping protectionism? The purpose of this thesis is to analyze how domestic and systemic factors affect national filing patterns throughout the global political economy. I first argue that countries that are economically integrated into global markets should be associated with less demand for antidumping protectionism. In particular, countries with higher leves of trade and financial flows should receive fewer petitions for antidumping protectionism from firms overall, ceteris paribus. I secondly argue that government responsiveness to petition filings is further conditioned by incumbent government ideology, finding that right wing governments are significantly less likely to respond to filed petitions compared to other types of government. Finally, I argue that governments with highly institutionalized incumbent political parties are more likely to respond to petition filings in order to maintain power and liberal trade regimes. I test this theoretical argument with a series of international and political indicators collected from 33 countries between 1978-2015, finding support for these arguments. The findings suggest that systemic economic variables structure country-level preferences for antidumping policies, while domestic political variables condition responses to systemic-level phenomena.
Study of plasma treatment effects on dental bond improvement, biofilm destruction, and oxidation prevention of AgNWs
Authors:   , Liao Yixuan
Published: October 2023

[EMBARGOED UNTIL 8/1/2024] Non-thermal plasma techniques have gained significant attention and applications in various fields, including the medical, dental, and industrial sectors. These techniques offer unique advantages in areas such as cell proliferation, cancer treatment, bacterial sterilization, biomaterial surface treatments, bond strength improvement, tooth whitening, oral bacterial deactivation, material surface modifications, package sterilization, and plant germination. This study specifically focuses on the application of non-thermal plasma techniques in tooth restoration materials for bonding performance improvement, oral biofilms destruction and recovery inhibition, and the oxidation protection of silver nanowires (AgNWs). The effects of plasma treatment on the bonding performance of lithium disilicate-resin and zirconia-resin, as well as brackets-teeth enamel bonding, were investigated in terms of immediate and long-term performance after completing the bonding procedures. The study also examined the impact of plasma treatment on the survival rate and recovery performance of dual-species oral biofilms under oxidative stress conditions. Furthermore, the report investigated the conductivity stability of AgNWs and the effectiveness of trimethylsilane (TMS) plasma nanocoatings. Additionally, the study also analyzed underlying mechanisms of the plasma treatment, which are crucial for optimizing its application in various dental and industrial processes. Overall, this study provides insights into the potential application of non-thermal plasma techniques for enhancing dental restoration material bond strength, inhibiting oral biofilm recovery, and protecting AgNWs from oxidation.
Understanding the experience of parents planning for the future care of adult children with autism
Authors:   , Stott Kevin L.
Published: October 2023

[EMBARGOED UNTIL 8/1/2024] This study explores the process of planning concerning parents and the future care and support of adult children with autism spectrum disorder (ASD). Eighteen parents between the ages of 50 and 74 completed genograms and in-depth interviews addressing their experience planning for their own and their children's future. Grounded theory analyses suggest that the process of planning is a perpetual cyclical process involving eight factors, including: ASD diagnosis, planning response, triggering event(s), planning (re)enacted, plans made, and situation changes. The level of satisfaction or confidence that parents have in the planning process is influenced by the last two factors: history in planning and reliability of support. Navigating losses represents the core concept because the data suggest that accumulating loss and the emotions associated with those losses have both a motivating and discouraging effect on the parents planning and is key to understanding the planning process.
Common Pollutants in Stormwater and Actions that Homeowners Can Take to Reduce Stormwater Pollution
Authors: Halcyon Anthony , Lusk Mary G. , Wilkie Ann C.
Published: October 2023

This publication explains what happens when stormwater runoff enters constructed environments, its impacts on water bodies, and how individuals can take steps to lower their own stormwater runoff footprint. This guide can increase awareness of ways to reduce each person's role in water quality impairment by stormwater pollution. This publication is intended primarily for urban residential readers and does not focus on agricultural runoff.
UJI EFEKTIFITAS JAMUR ENTOMOPATOGEN Lecanicillium lecanii Zimm. TERHADAP LARVA GRAYAK Spodoptera exigua Hubner PADA TANAMAN BAWANG MERAH Allium ascalonicum L
Authors: Putri Ria Astari
Published: October 2023

Shallots (Allium ascalonicum L) are one of the horticultural crops that have received attention from both the public and the government and shallots are one of the crop commodities that have high economic value and are widely cultivated by farmers in the lowlands. Indonesia is an attack of harmful plant-disturbing organisms (OPT). The main problem in onion cultivation is the onion caterpillar pest Spodoptera exiguaShallots (Allium ascalonicum L) are one of the horticultural crops that have received attention from both the public and the government and shallots are one of the crop commodities that have high economic value and are widely cultivated by farmers in the lowlands. Indonesia is an attack of harmful plant-disturbing organisms (OPT). The main problem in onion cultivation is the onion caterpillar pest Spodoptera exigua. This study was arranged using a Completely Randomized Design (CRD) with 5 treatments each and repeated 4 times. Each experimental unit consisted of 10 S. exigua instar 3. Treatment consisted of (P0) control treatment (P1) Treatment density 106 conidia/ml, (P2) Treatment density 107 conidia/ml, (P3) Treatment density 108 conidia/ml , (P4) Treatment density was 109 conidia/ml. S. exigua used for the application found 10 tails each. Observation variables used: mortality, mycosis, length of time mycosis, mummification and mummification time.The results showed that the use of entomopathogenic fungus L. lecanii had a significant effect on mortality of S. exigua, namely the most effective concentration was found in the treatment concentration of 109 konidia/ml with a mortality value of 62.5%. 80.95% and 98.33% mummification percentage. However, the fast results for S. Exigua mycosis were shown at a concentration of 108 conidia/ml and 109 conidia/ml, namely 1.06 days (Bar Chart 4.3) and the long time results for S. Exigua mummification were shown at a concentration of 107 conidia/ml, which was 4 days. while the treatment that had the fastest time for mummification was with a concentration of 109 conidia/ml which was 1.81 days and the use of entomopathogenic fungus L. lecanii could affect the mummification of S. exigua, the highest yield was indicated by a concentration of 109 conidia/ml, which was 98.3% (Bar Chart 4.4). while the treatment with the lowest mummification with a concentration of 106 conidia/ml is 75%.
KARAKTER PENCIRI MORFOLOGI TANAMAN UBI JALAR (Ipomoea batatas) (L.) Lam. DAN KEANEKARAGAMANNYA DI LAMPUNG
Authors: Yulianty Yulianty , Wahyuningsih Sri , Ernawiati Eti
Published: October 2023

Tanaman ubi jalar merupakan tanaman yang memiliki umbi batang. Ada beberapa macam ubi jalar berdasarkan warna umbinya, ada yang putih, kuning dan ungu. Khusus untuk ubi ungu mempunyai kandungan antosianin sehingga berwarna ungu. Pemilihan ubi jalar ungu disebabkan karena memiliki manfaat untuk kesehatan. Untuk mengetahui ciri dari tanaman ubi jalar dapat dilakukan dengan mengamati morfologi dan anatomi baik umbi maupun daunnya. Perlu dilakukan penciri lainnya sehingga memudahkan untuk mengenal kultivar yang ada dan ditemukan di Lampung. Hasil pengamatan morfologi untuk ubi jalar yang telah ditemukan memiliki karakter daun yang berbeda-beda, karakter lainnya adalah warna dan bentuk ubi jalar. Ada yang berwarna putih, oranye muda dan unguyang diperoleh dalam penelitian.
Mikrohabitat sarang burung gosong kaki merah (Megapodius reinwardt) di zona pemanfaatan Pulau Satonda Taman Nasional Moyo Satonda
Authors: Puspitasari Fini Laelani , Syaputra Maiser , Hadi Islamul
Published: October 2023

Satwa pembohong yang memiliki peranan penting di Pulau Satonda adalah burung gosong kaki merah ( Megapodius reinwardt ). Keunikan burung gosong kaki merah tidak mengerami telurnya sendiri, melainkan membangun sarang gundukan seperti bukit kecil yang berfungsi sebagai tempat menetaskan telurnya. Penelitian ini bertujuan untuk melakukan pengukuran mikrohabitat dan mengetahui pola sebaran sarang burung gosong kaki merah ( Megapodius reinwardt ) di Zona Pemanfaatan Pulau Satonda Taman Nasional Moyo Satonda. Metode yang digunakan pada penelitian ini adalah deskriptif dengan pendekatan kuantitatif. Analisis vegetasi menggunakan peta tunggal dan jalur observasi menggunakan reconnaissance rurvey.Terdapat 15 sarang burung gososng kaki merah. Suhu udara di dalam 27,1-30,8 °C dan kelembaban di dalam sarang 68%-90%, suhu di luar 27,6°C-29,7°C dan kelembaban di luar sarang 69%-89%, dan Intensitas cahaya 81-6.189 lux. C-Organik 0,99%-4,69%, kadar udara 4,76-22,22%, pH tanah 7,31-8,69, dan tekstur tanah pada setiap sarang di dominasi pasir. Kepadatan vegetasi tertinggi pada tingkat pohon di sarang ke-6 sebesar 475 pohon/Ha, sedangkan kerapatan vegetasi terendah di sarang ke-12 yaitu 125 pohon/Ha. Pohon asosiasi burung gosong yaitu Asam (Tamarindus indica) INP 45,13 % dan Banten (Lannea coromandelica) INP 54,09%. Pola sebaran sarang burung gosong di Pulau Satonda termasuk kategori seragam (Uniform) dengan nilai indeks derajat morisita yaitu -0.54.
PENGARUH MENGHAFAL AL-QUR’AN TERHADAP PEMBENTUKAN KARAKTER SANTRI DI PESANTREN
Authors: Habibah Mawarda , Amirudin Noor
Published: October 2023

The background of this research is the decline in character from year to year, especially students in Islamic boarding schools, while the research conducted by the author obtained data showing that there are some students who have good character. Based on this incident, this study aims to find out whether there is an influence of memorizing the Qur'an on the formation of the character of students at the Ayatur Rahman Islamic Boarding School. This study uses a quantitative approach and is included in the type of inferential research. The subjects in this study were the students of the Ayatur Rahman Gresik Islamic Boarding School with 70 respondents. Because the number of students is less than 100, the research technique uses population techniques and data collection techniques use closed questionnaires. The data analysis technique used simple linear regression with the help of the SPSS software version 23 for Windows. The results of the study are: (1) There is a significant influence between memorizing the Koran on the formation of the character of students at the Ayatur Rahman Gresik Islamic Boarding School, this is shown by the results of R = 0.604, with p = 0.00 <0.05 and is at a moderate level (0.40-0.70). (2) The magnitude of the influence of memorizing the Koran on the formation of the character of students at the Ayatur Rahman Islamic Boarding School is 36.5%, which is indicated by the price of p = 0.00 <0.05 while the remaining 63.5% is in the form of other factors, namely family factors environment, education and society.
PENGGUNAAN SEKAM PADI DENGAN ANYAMAN BAMBU SEBAGAI PAPAN SEMEN DEKORATIF
Authors: Wiyono Eko , Susilowati Anni
Published: October 2023

Abstrak

Penelitian dilakukan pada papan semen sekam padi dengan variasi kadar semen 75%, 100%, 125%, 150%, 175% dan 200%. Analisis menunjukkan bahwa Papan semen sekam padi yang dilapisi dengan anyaman bambu nilai berat papan, kerapatan, kadar air, pengembangan tebal dan kuat lentur rata-rata lebih besar masing-masing sebesar 49,381%; 13,342%; 30,206%; 146,106% dan 74,642% dari papan semen tanpa anyaman bambu. Sedangkan nilai penyerapan air papan semen sekam padi yang dilapisi dengan anyaman bambu rata-rata lebih rendah 37,092%. Papan semen sekam padi tanpa anyaman bambu yang memiliki sifat fisik dan mekanik yang paling baik serta masih memenuhi standar SNI 03-6861.1.2002 adalah papan semen sekam padi dengan komposisi kadar semen diatas 125% PC. Sedangkan untuk papan semen sekam padi dengan anyaman bambu semuanya memenuhi standar, tetapi yang memiliki sifat fisik dan mekanik yang paling baik serta kuat lentur yang tinggi adalah papan semen sekam padi dengan komposisi kadar semen 1 limbah : 1,75 PC.

Kata kunci : Sekam Padi, Anyaman bambu, Kuat lentur
DAMPAK PENAMBAHAN POLIMER TERHADAP KARAKTERISTIK BETON ASPAL
Authors: Achmad Djedjen , Sutjahjo Kusumo Dradjad
Published: October 2023

Abstrak

Syntetic Rubber Latex atau getah karet buatan, merupakan salah satu polimer organik yang memperlihatkan resiliensi (daya pegas) atau kemampuan meregang dan kembali ke keadaan semula dengan cepat Bahan ini terdispersi dengan stabil dalam suatu surfaktan yang mengandung air, berwarna putih seperti susu. Pada saat mengering patikelnya bersatu membentuk lapisan film yang berlanjut. Polimer organik adalah suatu bahan yang terdiri atas molekul raksasa yang dibentuk oleh sekumpulan molekul sederhana yang dikenal sebagai monomer dari hasil uji pada campuran panas (hot mix) dengan mencampurkan aspal sebanyak 6.5 % dari berat campuran dan agregat yang telah dipanaskan dalam tempat pemanas, diaduk pada suhu 140⁰ C dan dicampur polimer, lalu dicetak pada suhu 120⁰ C. Persentase polimer yang dimasukkan adalah 10, 15 dan 20 % dari berat aspal. Dari hasil uji marshall menunjukkan semakin tinggi polimer ditambahkan dampaknya adalah nilai flow semakin tinggi, sedangkan nilai stabilitas dan nilai marshall quotient nya semakin rendah..

Kata kunci : polimer, beton aspal, marshall, stabiitas, flow
Rancang Bangun Prototype Pengiris Umbi
Authors: Sholeh Mochammad , Pratama Gatra Herlambang , Pratama Hagi Yudha , Apair Risyky Yudha
Published: October 2023

Abstract

Home industry of producing chips which made from tubers are currently still using a simple methodi.e. by using the cut manually, so it takes a lot of effort and quite a long time time. One of the alternatives to increase efficiency and productivity is by making a tuber slicer tool. Making the tool starts from designing the cutting mechanism. Then, the calculation starts with an experiment to find the shear stress cassava because cassava is considered to have a stronger shear stress than other tubers. And proceed by finding the amount of power the electricity motor is used, find the forces on the elements of the machine used (belt & pulleys, shaft), and the amount of capacity generated by the tuber slicer tool. After making machines, testing is done to find the actual capacity that can be generated by the tuber slicer tool. Mover uses a 0.5 HP of electricity motor with a maximum speed of 1420 rpm with a round disc about 473 rpm. The resulting capacity is 147 kg/h with a maximum diameter of tuber 75 mm and the pieces have a thickness 1 mm.

Keywords : chip, tubers, capacity, thickness

Abstrak

Industri rumah tangga yang memproduksi makanan terbuat dari umbi-umbian dalam bentuk chip saat ini masih menggunakan metode sederhana yaitu dengan menggunakan pemotongan secara manual, sehingga selain memerlukan banyak tenaga juga waktu yang cukup lama. Salah satu alternatif untuk meningkatkan efisiensi dan produktivitas adalah dengan menggunakan alat pengiris umbi. Pembuatan alat dimulai dari penentuan kapasitas alat yang diinginkan, merancang bentuk mekanisme pemotongan, menentukan ukuran dan mewujudkan desain. Perhitungan dimulai dengan melakukan percobaan untuk mendapatkan nilai tegangan geser singkong karena singkong dianggap memiliki tegangan geser paling besar dibandingkan umbi-umbian lainnya. Selanjutnya menentukan daya motor listrik yang digunakan, juga gaya pada elemen mesin yang digunakan (belt & puli, poros), setelah itu menentukan ukuran dari tiap elemen alat berdasarkan perhitungan teknik. Setelah membuat mesin, pengujian dilakukan untuk mengetahui kapasitas sebenarnya yang dapat dihasilkan oleh alat pengiris umbi. Dalam protoyype ini digunakan penggerak motor listrik yang berkekuatan 0,5 HP dengan kecepatan maksimum 1420 rpm dan dengan transmissi yang dipergunakan menhasilkan putaran piringan pemotong sekitar 473 rpm sehingga menghasilkan produk irisan dengan ketebalan 1 mm dan berat 147 kg / jam dengan bahan baku umbi-umbian atau buah berdiameter maksimum 75 mm.Sementara ukuran ketebalan pemotongan bisa diatur sesuai kebutuhan.

Kata Kunci: Chip, Umbi-umbian, Kapasitas, Ketebalan
STUDI KASUS KERUSAKAN JEMBATAN DAN PENGARUHNYA TERHADAP SISA UMUR JEMBATAN
Authors: Indianto Andi , Supriyadi Iwan
Published: October 2023

This paper presents the results of research case studies of bridge damage and influence on the remaining life of the bridge. This research takes the case of the highway bridge between kebon jeruk – penjaringan west of jakarta. The purpose of this activity is to get an idea of the residual life of the bridge that is related to the presence of defects in the structure of the bridge. To determine the actual condition of the bridge, performed data collection by measuring the compressive strength of concrete, crack depth, crack width, thick concrete cover, reinforcement diameter, reinforcement spacing, deflection due to load and run. From these data made feasibility and serviceability analysis to determine the value of the bridge.condition. Furthermore value condition used to predict the residual life of the bridge. The results of the residual life analysis showed that highway bridge on 1 segment , who suffered damage to the value of the condition 2.67, residual life if the damage continue only 1.07 years, and if the damage does not continue, the remaining life of 11.67 years. For segment 3 which suffered minor damage with the value of condition 2, residual life if the damage continues only 2,125 years, and if the damage does not continue the residual life of 18.89 years.

Keywords: bridge, pile slab, value condition, feasibility, serviceability, remaining life.
PROTOTIPE DINDING BETIK HASIL DAUR ULANG SAMPAH PLASTIK
Authors: NURCAHYANINGSIH SRI RESPATI , SUTJAHJO KUSUMO DRADJAD , ACHMAD DJEDJEN
Published: October 2023

Researches about plastic concrete(betik)have been done since 2004 by kusumo drajad s. Betik consistsof a mixture of cement, sand, plastic aggregates (pellets) and water, can be categorized as lightweight concrete which have the same compressive strength with the normal concrete, approximately 120 kg/cm2. The research prototype betik walls which is done today as the result of the development composision ofbetik , consist of 1portion of cement, 2 portions of sand and 4 portions of plastic aggregate (recycling product ) and 0,6 portion of water. Afterward, all materials were mixed and poured into plastic bottles of mineral water packaging (such as aqua, ades ). Before the bottles are filled in,it should be cut into24 cm high, assembled with bendrat wires, and added concrete steel reinforcement diameter of 8 mm at the center of the bottle into a series of blocks that consisting of 6 bottles.

Based on the testing in physical properties of a block betik’s wall samples have been tested: the slump’s average value is 6cm, the bottom’s surface is quite smooth, no cracked and all intact, but there are several cross-section of bottle that has been filled betik not circle.the experiment also showed: the size of betik’s block : 8.5 cm widht, 48 cm length, 24 cm high and average weight of each block betik’s walls is 9.5 kg.

Furthermore, the blocks of betik’s wall were arranged and bonded using mortar that has composition 1 portion of cement and 4 portions of sand. The block of betik’s wall also supported horizontally by using bendrat wire and vertically by using 8 mm concrete bar, and shaped a segment of betik’s wall into 1.5 x 1.5 m. Subsequently, the wall of segment was standed up and than taken off, so the wall collapsed. The results shown that the knots of bindrat or concrete bar were in good condition and didn’t fall. The other results in this study were the blocks of betik’s wall blocks that collapsed are still in whole condition and it can be used again.

Keywords: betik, plastic pellets, walls, concrete
ANALISIS KINERJA BETON ASPAL BERBAHAN TAMBAH LIMBAH BOTOL AIR MINERAL (PET) TERHADAP VARIASI TEMPERATUR DAN LAMA PERENDAMAN BANJIR
Authors: LATIFA EVA AZHRA , PRAMONO EDY
Published: October 2023

Roads with flexible pavements whose surface layer consists of asphalt concrete have a high likelihood to get deteriorate due to frequent submersion caused by floods. This research aims to attain an economical asphalt concrete mix with high durability to submersion under the influence of high temperature. Performance is improved by making the asphalt concrete mix resistant to temperature changes through adding mineral water bottle wastes into asphalt until the optimum characteristics are attained. The filler aggregate used is stone ash. Research is conducted on the asphalt concrete mixture that submerged for 24.72 and 120 hours at 300, 380, and 500 celsius. Stability, flow, marshall quotient and pore contents are all tested by the marshall method. . Determination of the best mix with soaking time and temperature variation is done by the regression analysis method.

Keywords: aggregate filer, asphalt concrete, mineral water bottle waste, submersion, stability, temperature.
PERTUMBUHAN BARANG SISA KONSTRUKSI (CONSTRUCTION WASTE) DI INDONESIA
Authors: NURSIN AFRIZAL , LATIEF YUSUF , ABIDIN ISMET
Published: October 2023

ABSTRACT

Construction waste material and demolition is waste material that produced during construction process, renovate, and demolition building and structure. A large part of often thrown away in landfill. Is finding that construction waste material become serious problem that must be monitoring because its growth high enough. Objectives of paper, it is to see situation of construction waste in indonesian. This condition are needed for finding its occurrence and so can be found significant effort to answer it. Some methods as used in research this is the survey with preceded interview. Where to every responder that average is manager project gives answer to question raised. The result of data processing that conducted indicate that construction waste material in indonesia shows level tendency for three the last years, that is as big as: in first waste material value are compared to project value as high as 2,35%, later in second 2,55%, and in third leap become 3,01%.

Keyword: waste material, construction project, indonesiaN

ABSTRAK

Barang sisa konstruksi dan demolisi adalah barang sisa yang dihasilkan selama proses konstruksi, renovasi, dan demolisi bangunan dan struktur. Sebagian besar sering dibuang dalam urugan tanah. Merupakan temuan bahwa barang sisa konstruksi menjadi persoalan yang serius yang harus dicermati karena perkembangannya yang cukup tinggi. Tujuan penulisan makalah ini adalah untuk melihat keadaan barang sisa konstruksi di indonesia. Hal ini diperlukan untuk menukenali kejadiannya dan dengan demikian dapat ditemukan usaha yang signifikan untuk menjawabnya.Beberapa metode yang digunakan dalam penelitian ini adalah survey dengan didahului wawancara. Dimana kepada setiap responden yang rata-rata adalah proyek manajer memberikan jawaban terhadap pertanyaan yang diajukan. Hasil dari pengolahan data yang dilakukan menunjukan bahwa barang sisa konstruksi di indonesia menunjukan kecenderungan meningkat untuk tiga tahun terakhir, yaitu sebesar: pada tahun pertama nilai barang sisa dibandingkan nilai proyek sebesar 2,35%, kemudian pada tahun ke dua 2,55%, dan pada tahun ke tiga melonjak menjadi 3,01%.

Kata kunci: barang sisa, proyek konstruksi, indonesia
SOIL FOUNDATION IMPROVEMENT WITH TIRE-USED TO REDUCE SETTLEMENT OF SHALLOW FOUNDATION EMBEDDED ON SATURATED DEPOK CLAY
Authors: AGUNG M.A PUTERA , Pramusandi Sony , Sasongko IMAM Hariadi
Published: October 2023

ABSTRACT

One of soil foundation improvement methods to anticipate the problem of settlement is to use tire-used (pneusol). This is a preliminary study and aims to determine the reduction of vertical displacement or settlement on saturated clay reinforced with tire-used. Tire-used material generally has a density of between 8 and 10 kn/m3 and is usually classified as a material lightweight tire. Laboratory model test used 4 (four) models, model with and without tire-used and some variations of foundation model size (rollag). Ratio of the diameter of tire-used and rollag size is 0.60. Results are compared with the data obtained by plaxis program. Analysis of the plaxis program assumed that plane strain triangle element type; 6 (six) nodes element; mohr – coulomb criteria; and soil foundation in undrained condition. Results of the experimental model at laboratory works show that the tire-used can reduce the settlement of soil foundation up to 20% at maximum normal stress. However, the value of settlement obtained by experimental model at laboratory works could not be compared with the plaxis program results.

Keywords : tire used, hallow foundation, bearing capacity,settlement
KAJIAN DAYA DUKUNG SUMBER AIR HUJAN TERHADAP RENCANA TATA RUANG WILAYAH (RTRW) KOTA DEPOK
Authors: SA’AT JASURI
Published: October 2023

ABSTRACT

A city development is indicated by population growth and more complete facilities compare to rural area. Depok is one of city with massive development nowadays with high economic potential. In 2010, depok population is 1.675.213 peoples, this number has increase by 31.65% compare to 2000 (1.145.091 peoples), the average population growth is 3.64% per year.

In line with high population growth and changing on people dynamic, most of green open space area (rth) has shifting the function into used spaced with many buildings is develop nowadays for residential (house, apartment), office building, restaurant, etc.

For supporting population growth, one of the most important factor need to consider is the availability of reserved water for supporting people’s daily life.

The main objective of this study was to determine the potential capacity of rain water sources to the spatial plan of depok city in 2010. Some of water source for covering all depok area are kali, situ & ground water. Currently, the usage of ground water is more dominant (used by 82.5% of total population).

Based on the research result, potential source of rain water in depok is sufficient because the annual rainfall duration is very high (1106 – 4579 mm), resulting on the surplus value of dependable flow in each districts, except in beji district during dry season, in september and oktober.

Keyword: rain water sources, rainfall, spatial plan.
MOBILIZATION OF MINI PILE UPLIFT RESISTANCE IN SAND
Authors: Pradiptiya Andikanoza , Yuwono Yuwono , Sudardja Handi , Istiatun Istiatun
Published: October 2023

Abstract

Shaft resistance of tension pile will be fully mobilized at certain displacement. Some structures impose limits to the displacement of pile with a relatively small value in order not to cause damage. Therefore, it is necessary to know the behavior of pile resistance reaction against load that works in every displacement.

The study was conducted using the model of single pile made of concrete with a length of 0,2 m ; 0,3 m ; 0,4 m and each diameter 0,02 m ; 0,03 m ; 0,04 m. The model pile is jacked in sand that has been compacted in a box and then given uplift load that refers to the ASTM D3689-07 procedure E. Pile resistance reaction is shown by pile friction modulus and determined by mobilized unit shaft resistance and pile displacement relationship.

The results showed that mobilization of uplift resistance of mini pile that has been counted using friction modulus can only approach the value of true observations, so that it requires further consideration as design parameter.

Keywords : Mini pile, sand , uplift resistance.
PERENCANAAN ULANG SISTEM DRAINASE PERUM GRIYA ASRI WIKA JATIRANGGON BEKASI
Authors: Prihutomo Nuzul Barkah , Nurfadillah M. Zaqqi , Adistia Sarah
Published: October 2023

Abstract

Drainage is a series of waterworks that serve to reduce and remove excess water from the land or in a region, so that the land can function optimally and is defined as the infrastructure that serves the water and the surface water body or to buildings and artificial recharge. The goal is to help resolve the problem of flooding that occurred in Perum Griya Asri Wika Jatiranggon Bekasi. Data processing method using a manual calculation according a rational method for calculation the debit of rain, and Manning formula for the debit channel. After calculating, it is known there are many dimensions that couldn’t accommodating the needs of existing discharge so that the most rational solution to cope with the flood was able to do normalization and change the existing channel which was originally made of stone into a u-ditch dimensional (50.70.120cm)

Keywords: Flood, Drainage, Capacity, U-ditch.

Abstrak

Drainase adalah serangkaian bangunan air yang berfungsi untuk mengurangi dan/atau membuang kelebihan air dari suatu kawasan atau lahan, sehingga lahan dapat difungsikan secara optimal dan diartikan sebagai prasarana yang berfungsi mengalirkan air permukaan ke badan air dan/atau ke bangunan resapan buatan. Tujuannya untuk membantu menyelesaikan permasalahan banjir yang terjadi pada Perum Griya Asri Wika Jatiranggon, Bekasi. Metode pengolahan data menggunakan perhitungan secara manual sesuai dengan metode rasional untuk menghitung debit hujan, dan rumus manning untuk debit saluran. Setelah dilakukan perhitungan maka diketahui masih banyak dimensi yang tidak mampu menampung debit kebutuhan yang ada sehingga solusi yang paling rasional untuk mengatasi banjir tersebut adalah dengan melakukan normalisasi pada saluran dan mengubah saluran eksisting yang semula terbuat dari batu kali menjadi u-ditch dimensi (50.70.120cm).

Kata kunsi : Banjir, Drainase, Kapasitas, Uditch.
JQUERY SEBAGAI KOMPONEN USABILITAS ANTARMUKA APLIKASI WEB
Authors: Ganiardi Muhammad Aris , Salamah Irma , Kusumanto RD.
Published: October 2023

Abstract

Web applications are most widely used by the user in the cooperative information portal. This web application type is used as a communication tool to distribute information to the general public relating to the the organization or company. State Polytechnic Sriwijaya develop information portal that is used to distribute information related to academic activities in the form of announcements and news that happens in the State Polytechnic Sriwijaya. Portal of information held by the State Polytechnic Sriwijaya has not implemented the quality factor of reusability in Web application development cycle. The purpose of this research is to implement JQuery as the application of the quality factor of reusability at the Polytechnic of Sriwijaya information portal. JQuery is applied on the portal interface to allow users to use the information portal. Results obtained from this study that more information portal interesting and attractive.

Keywords : JQuery, Usabilitas, Aplikasi Web

Abstrak

Aplikasi web yang paling banyak digunakan oleh pengguna kooperasi berbentuk portal informasi. Jenis aplikasi web ini digunakan sebagai alat komunikasi untuk mendistribusikan informasi ke masyarakat umum berkaitan dengan organisasi atau perusahaan. Politeknik Negeri Sriwijaya mengembangkan portal informasi yang digunakan untuk mendistribusikan informasi berkaitan dengan kegiatan akademik berbentuk pengumuman dan berita yang terjadi di Politeknik Negeri Sriwijaya. Portal informasi yang dimiliki oleh Politeknik Negeri Sriwijaya belum menerapkan factor kualitas usabilitas dalam siklus pengembangan aplikasi web. Tujuan penelitian ini adalah mengimplementasikan JQuery sebagai penerapan factor kualitas usabilitas pada portal informasi Politeknik Negeri Sriwijaya. JQuery diterapkan pada antarmuka portal untuk memudahkan pengguna menggunakan portal informasi tersebut. Hasil yang didapatkan dari penelitian ini portal informasi yang lebih menarik dan atraktif.

Kata kunci : JQuery, Usability, Web Application
PENGASUTAN MOTOR INDUKSI TIGA PHASA PADA PENGEMBANGAN INSTALASI TENAGA DAN INSTALASI PENERANGAN DI BENGKEL LISTRIK
Authors: Said Anwar , Bastiar Yuda
Published: October 2023

Abstract

The use of an induction motor in an electrical power generation system is needed where the usefulness of an induction motor is as driving. Constraints on the use of an induction motor is at the time of starting. That is because the starting current that occurs in a very large induction motors. To fix the starter is needed so that later no damage equipment and interfere with the electrical system. Motors that will be analyzed is the motor in an electric workshop. Because of the breadth of the induction motors use a lot done various studies to improve the performance of an induction motor. Among the many studies that include about motor starting method. Some traditional induction motor starting methods include the DOL (Direct On Line), Y- Δ, autotrafo, and the primary resistor. The method used in the motor starting in the workshop is the starting DOL and star-delta starting.

Keywords : DOL, star-delta, induction motor

Abstrak

Penggunaan motor induksi didalam suatu sistem kelistrikan pembangkit listrik sangat dibutuhkan dimana kegunaan dari motor induksi adalah sebagai penggerak. Kendala dari penggunaan motor induksi adalah pada saat starting. Hal tersebut dikarenakan arus starting yang terjadi pada motor induksi sangat besar. Untuk mengatasinya diperlukan starter agar nantinya tidak merusak peralatan dan mengganggu sistem kelistrikannya. Motor yang akan dianalisa adalah motor pada bengkel listrik. Karena begitu luasnya penggunaan motor induksi maka banyak dilakukan berbagai penelitian untuk meningkatkan unjuk kerja dari motor induksi. Diantara banyaknya penelitian itu diantaranya adalah tentang metode starting motor. Beberapa metode starting tradisional motor induksi diantaranya adalah DOL (Direct On Line), Y- Δ, autotrafo, dan primary resistor. Metode starting yang digunakan pada motor di bengkel adalah dengan pengasutan DOL dan pengasutan star-delta.

Kata kunci : DOL, star-delta, motor induksi
KAJIAN ANALISIS ENGINEERING DENGAN METODE COMPUTATIONAL FLUID DYNAMICS
Authors: Widiawaty Candra Damis , Siswantara Ahmad Indra , Gunadi Gun Gun R
Published: October 2023

ABSTRACT

Computational fluid dynamic is fluid flow analysis in spesific system by mean of computer based simulation. The use of CFD to predict fluid flow in characteristic system which has specified conditions.

The purpose of this research is to describe the procedural of simulation. The scope of this research is to verify the calculation result with the simulation result. The method of this research are iteratif calculaation and simulation.

The result of iteratif calculation water outlet temperatur is of 71,88oC, while the simulation result for S1 is of 62,58 oC, S2 is of 79,44 oC, S3 is of 71,02oC, and S4 is of 71,68 oC. The difference of the result cause by the dimension of diameter tube, type of flow, and distribution of grid. The result of this research show that the accuration of simulation is depend on the intial engineering thingking, grid, and fluid flow specification.

Key words: CFD, fluid, grid, simulation

ABSTRAK

Computational Fluid Dynamics (CFD) adalah pemanfaatan komputer untuk menghasilkan informasi tentang bagaimana fluida mengalir pada kondisi tertentu. CFD digunakan untuk membuat prediksi aliran fluida di dalam suatu sistem tertentu pada suatu kondisi yang ditentukan.

Penelitian ini bertujuan mendeskripsikan langkah simulasi yang tepat. Lingkup penelitian ini adalah membandingkan hasil kalkulasi dengan hasil simulasi. Metode penelitian ini adalah kalkulasi iteratif dan simulasi. Hasil kalkulasi adalah temperatur keluaran air sebesar 71,88oC sedangkan dengan simulasi sebagai berikut parameter S1 sebesar 62,58 oC, S2 sebesar 79,44 oC, S3 sebesar 71,02oC, dan S4 sebesar 71,68 oC. Berbedaan hasil simulasi berurut-urut disebabkan oleh diameter tube, perbedaan tipe aliran, dan perbedaan distribusi grid. Hasil penelitian ini menunjukkan bahwa perancangan dengan software CFD sangat dipengaruhi oleh pemahaman pengguna terhadap sistem yang akan disimulasikan, pembangkitan grid/mesh, dan spesifikasi aliran.

Kata kunci: CFD, fluida, grid, simulasi
ANALISA KEKUATAN MEKANIK PADA MATERIAL AISI 4340 TERHADAP WELDING REPAIR DENGAN METODE SMAW
Authors: Purnama Dewin , Wardana Galih Ardy , Adicandra Nikko Setyo
Published: October 2023

ABSTRAK

Perkembangan teknologi di bidang perindustrian yang semakin maju tidak dapat dipisahkan dari proses pengelasan, salah satunya adalah welding repair. Perbaikan pengelasan bisa mempengaruhi suatu prosedur untuk dapat menghasilkan komponen yang aman dan mampu digunakan sesuai dengan ketentuannya. Kekuatan sambungan las harus diperhatikan dan dijamin kekuatannya, sehingga diharapkan minimal kekuatannya sama dengan kekuatan base metal, khususnya material yang digunakan untuk poros. Tujuan dari penelitian ini adalah membandingkan kualitas mekanik antara raw material baja paduan rendah kekuatan tinggi (HSLA) AISI 4340 dengan material yang sudah dilas. Sehingga akan didapat informasi mengenai kekuatan perubahan sifat mekanik dari sambungan las material AISI 4340 setelah di welding repair dibandingkan dengan raw material AISI 4340.

Metode proses pengelasan yang digunakan adalah SMAW (Shielded Metal Arc Welding) DC polaritas terbalik dengan arus 70 Ampere dan 100 Ampere, elektroda yang dipakai E7016 dan E7018 diameter 3,2 mm serta kampuh yang digunakan adalah kampuh V-Groove dengan sudut 60°. Material uji adalah AISI 4340. Pengujian yang dilakukan adalah uji tarik, uji impak dan uji kekerasan.

Hasil akhir dari penelitian ini telah didapat nilai kekuatan tarik material hasil pengelasan mengalami penurunan sebesar 0,26% dibanding raw material. Nilai rata-rata kerja patah dan nilai ketangguhan material hasil pengelasan mengalami penurunan terhadap raw material, yaitu sebesar 13,73% untuk kerja patah dan 9,18% untuk nilai ketangguhan. Nilai rata-rata kekerasan material hasil pengelasan juga mengalami penurunan 1,64% terhadap raw material. Kesimpulan yang diperoleh dari penelitian ini adalah material AISI 4340 tidak dapat dilakukan welding repair menggunakan metode SMAW dengan elektroda E7018 diameter 3,2 mm.

Kata Kunci : Welding Repair, Las SMAW, AISI 4340, Sifat Mekanik Material