bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hubungan Antara Jumlah Leukosit dengan Kejadian Syok pada Penderita DBD Anak di RS Al-Islam
Authors: Fani Amalia Putri  , Wida Purbaningsih  , Retno Ekowati  
Published: March 2024

Abstract. Dengue Hemorrhagic Fever (DHF) can be fatal if it turns into SSD or DSS because Fatality Rate DSS can reach 10% or even more. However, if detected early,Fatality Rate can be reduced to less than 1%. So this research aims to find predictors before shock occurs, and the indicator studied is the number of leukocytes. This research is an analytical observational research approach cohort retrospective to analyze the relationship between the number of leukocytes and the incidence of shock in children with Dengue Hemorrhagic Fever. Samples were taken from inpatient medical records at Al-Islam Hospital in the period 1 January 2022 to 28 February 2023. Samples were taken using the total sampling In DHF patients with shock and without shock then analysis was carried out chi-square. On crosstabulation It was found that all 12 children who experienced a decrease in their leukocyte count experienced shock, but of the 55 children who had their leukocyte count within normal limits, 18 children or the equivalent of 32% experienced shock. An alternative analysis is carried out, namely by fisher's exact test because there is value expected count which is not feasible to do uji chi-square and obtained a p value = 0.000 so it can be concluded that there is a relationship between the number of leukocytes and the incidence of shock in pediatric dengue fever patients.
Abstrak. Demam Berdarah Dengue (DBD) bisa berakibat fatal jika berubah menjadi Sindrom Syok Dengue (SSD) atau Dengue Shock Syndrome (DSS) karena Fatality Rate DSS bisa mencapai 10% bahkan lebih. Namun, jika dideteksi sedari dini, Fatality Rate dapat berkurang sampai kurang dari 1%. Sehingga penelitian ini bertujuan untuk mencari prediktor sebelum terjadinya syok, dan indikator yang diteliti adalah jumlah leukosit. Penelitian ini merupakan penelitian observasional analitik dengan pendekatan cohort retrospective untuk menganalisis hubungan jumlah leukosit dengan kejadian syok pada penderita Deman Berdarah Dengue anak. Sampel diambil dari rekam medis rawat inap RS Al-Islam pada periode 1 Januari 2022 sampai 28 Februari 2023. Sampel diambil dengan metode total sampling pada pasien DBD dengan syok dan tanpa syok lalu dilakukan analisis chi-square. Pada crosstabulation didapatkan bahwa 12 anak yang mengalami penurunan jumlah leukosit semuanya mengalami syok, tetapi dari 55 anak yang memiliki jumlah leukosit dalam batas normal terdapat 18 anak atau setara dengan 32% mengalami syok. Dilakukan analisis alternatif yaitu dengan fisher’s exact test karena ada nilai expected count yang tidak memenuhi untuk dilakukan uji chi-square dan didapatkan nilai p = 0,000 sehingga dapat disimpulkan bahwa terdapat hubungan antara jumlah leukosit dengan kejadian syok pada pasien DBD anak.
Gambaran Karakteristik dan Beban Kerja pada Pekerja Bagian Produksi Suku Cadang Otomotif PT. “X” Cikarang
Authors: Nada Nabila Ramadhani  , Titik Respati  , Purnomo  
Published: March 2024

Abstract. Musculoskeletal disorders are a primary work-related health concern globally, often leading to disability and lost work years. This study explores the distribution of characteristics and workloads among workers in automotive production at PT. "X" in Cikarang Objective: This study's primary goal is to describe employees' characteristics and physical workload. Method: The study used an analytical observational approach with a cross-sectional design. It involved all 46 workers through a total sampling method. The workload assessment was based on SNI 7269:2009 guidelines and musculoskeletal complaints using the Nordic Body Map (NBM). From the Pearson correlation test results, a value of p=0.032 (p<0.05) was obtained, indicating a positive relationship between workload and musculoskeletal complaints. Conclusion of this study is there is a relationship between workload and musculoskeletal complaints.
Abstrak. Gangguan muskuloskeletal merupakan salah satu masalah kesehatan yang sering terjadi di tempat kerja dan menjadi penyebab kedua terbesar kecacatan global, diukur dari jumlah tahun kerja yang hilang. Beban kerja fisik dikenal sebagai faktor risiko utama untuk gangguan ini. Namun, belum banyak penelitian yang mengkaji gambaran karakteristik dan beban kerja pada pekerja. Penelitian ini bertujuan untuk menganalisis karakteristik dan beban kerja pada pekerja di bagian Produksi Suku Cadang Otomotif PT. “X” Cikarang. Untuk itu, penelitian ini dilakukan dengan menggunakan metode observasional analitik dan pendekatan cross-sectional. Sampel penelitian diambil secara keseluruhan dari responden yang berjumlah 46 orang, dengan mengukur beban kerja mereka berdasarkan pedoman SNI 7269:2009 dan keluhan muskuloskeletal menggunakan Nordic Body Map (NBM). Dari hasil uji korelasi Pearson, diperoleh nilai p=0.032 (p<0.05), yang menunjukkan adanya hubungan positif antara beban kerja dan keluhan muskuloskeletal. terdapat adanya hubungan antara beban kerja dengan keluhan muskuloskeletal.
Uji Aktivitas Antifungi Ekstrak Herba Floss Flower (Ageratum Houstonianum Mill.) Terhadap Pertumbuhan Malassezia Furfur dan Tricophyton Mentagrophytes
Authors: Iqlima Khairunnisa Tanjung  , Lanny Mulqie  
Published: March 2024

Abstract. Fungal growth on the surface of the skin that occurs due to fungal infections can be treated by using antifungals. However, the use of synthetic antifungals carries the risk of causing resistance, so alternative antifungals from natural ingredients are increasingly in demand, one of which is from weed plants such as floss flower. This study aims to see the antifungal activity of floss flower extract at concentrations of 5%, 10%, 20%, 40%, 60% and 80% against Malassezia furfur and Tricophyton mentagrophytes, the methods that uses in this research are well diffusion method. The conclusion from this research showed that floss flower extract have antifungal activity against Malassezia furfur and Tricophyton mentagrophytes.
Abstrak. Pertumbuhan jamur di permukaan kulit yang terjadi akibat infeksi jamur dapat diatasi dengan menggunakan antifungi. Akan tetapi, penggunaan antifungi sintetik beresiko menimbulkan resistensi, sehingga alternatif antifungi dari bahan alam semakin diminati, salah satunya dari tanaman gulma seperti tumbuhan floss flower. Penelitian ini bertujuan untuk melihat adanya aktivitas antifungi dari ekstrak floss flower pada konsentrasi 5%, 10%, 20%, 40%, 60% dan 80% terhadap jamur Malassezia furfur dan Tricophyton mentagrophytes dan metode yang digunakan adalah metode difusi sumuran agar. Kesimpulan dari penelitian ini menunjukkan ekstrak floss flower memiliki aktivitas antifungi terhadap Malassezia furfur dan Tricophyton mentagrophytes.
Estimasi Regresi Kuantil untuk Data Biner Longitudinal dengan Pendekatan Bayesian-Gibbs Sampling pada Kasus TBC dan Stunting pada Anak di RSUD Lembang Tahun 2022
Authors: 10060119131 Alvina Damayanti Fauzia , Suliadi  
Published: March 2024

Abstract. Quantile regression models the quantiles of the dependent variable as a function of independent variables. This method is robust to ourlier and heterscedasticity and allows modeling the influence of independent variables at various quantile points, providing a more comprehensive insight into the relationship between dependent and independent variables. Recently Rahman & Vosmeyer (2019) proposed a method named “quantile binary longitudinal data” (QBLD) to analyze longitudinal binary data for quantile regression based on Bayesian approach. This study applied QBLD to analyze the effect of predictor variables (x1-age, x2-Weight, x3-Height and x4-stunting status) to the probability of children tuberculosis (TB) status for different quantiles (0.25, 0.50, 0.75). In all three quantile regressions, based on Gelman-Rubin statistics, it was found that all regression coefficients have converged. The models for quantiles 0.25, 0.50, and 0.75 were: ; respectively. For all three quantile regressions, variables x1 (age), x2 (Weight), x3 (Height) significantly influenced the response, while x4 (stunting status) did not.
Abstrak. Model regresi kuantil menggambarkan kuantil variabel dependen sebagai fungsi dari variabel independen. Metode ini tahan terhadap pencilan dan heteroskedastisitas, serta memungkinkan pemodelan pengaruh variabel independen pada berbagai titik kuantil, memberikan wawasan yang lebih komprehensif tentang hubungan antara variabel dependen dan independen. Rahman & Vosmeyer (2019) mengusulkan metode "quantile binary longitudinal data" (QBLD) untuk menganalisis data biner longitudinal untuk regresi kuantil berdasarkan pendekatan Bayesian. Penelitian ini menerapkan QBLD untuk menganalisis pengaruh variabel prediktor (x1-umur, x2-Berat, x3-Tinggi, dan x4-status stunting) terhadap probabilitas status tuberkulosis (TBC) pada anak-anak untuk kuantil yang berbeda (0,25, 0,50, 0,75). Pada ketiga regresi kuantil, berdasarkan statistik Gelman-Rubin, ditemukan bahwa semua koefisien regresi telah konvergen. Model untuk masing-masing kuantil adalah ; . Pada ketiga regresi kuantil, x1 (umur), x2 (Berat Badan), x3 (Tinggi Badan) berpengaruh siginifikan terhadap respon, sedangkan x4 (status stunting) tidak berpengaruh signifikan.
Identifikasi Pelayanan Puskesmas Berdasarkan Network Analysis di Kabupaten Bandung
Authors: Abiel Fida Nazzary Djabrail  , Irland Fardani  
Published: March 2024

Abstract. Health is one of the most important things for humans. A sign of poor health is that humans will have difficulty carrying out their daily activities. The government is obliged to build health facilities to support the health of its people. Puskesmas is a health facility provided by the government for community health services. The health center service standard from SNI 13-1733-2004 has a radius of 3000 meters. Bandung Regency has a population in 2022 of 3,718,660 residents with population growth of 1.3% per year. This is because Bandung Regency is the hinterland area of ​​Bandung City. Based on this phenomenon, the problem of this research is "Have all areas in Bandung Regency been identified as being included in the community health center service area?". Researchers use quantitative methods supported by geospatial information systems (GIS). Data collection in this research was agency and literature study. The monetary data used are the coordinates of the location of the health center, road network shapefiles, and average vehicle speed. The analysis method used is network analysis with the service area method. The results of this research show that the service coverage area in Bandung Regency is still not covered throughout the region. The total area of ​​puskesmas service coverage based on distance is 193,211,573 hectares and the total area of ​​puskesmas service coverage based on travel time is 2,281,709,838 hectares.
Abstrak. Kesehatan merupakan salah satu hal terpenting bagi manusia. Tanda apadanya kesehatan, manusia akan kesulitan dalam menjalani aktivitas kesehariannya. Pemerintah wajib membangun sarana kesehatan untuk menunjang kesehatan masyarakatnya. Puskesmas merupakan sarana kesehatan yang disediakan pemerintah untuk pelayanan kesehatan masyarakat. Standar pelayanan puskesmas dari SNI 13-1733-2004 memiliki jangkauan radius seluas 3000 meter. Kabupaten Bandung memiliki jumlah penduduk di tahun 2022 sebanyak 3.718.660 penduduk dengan jumlah pertumbuhan penduduk sebesar 1,3% pertahun. Hal ini dikarenakan Kabupaten Bandung merupakan wilayah hinterland nya Kota Bandung. Berdasarkan fenomena tersebut, maka permasalahan penelitian ini yaitu "Apakah semua wilayah di Kabupaten Bandung sudah teridentifikasi masuk kedalam area pelayanan puskesmas?". Peneliti menggunakan metode kuantitatif yang didukung dengan sistem informasi geospasial (SIG). Pengumpulan data dalam penelitian ini yaitu instansi dan studi pustaka. Data-data uang digunakan yaitu titik koordinat lokasi puskesmas, shapefile jaringan jalan, dan rata-rata kecepatan kendaraan. Metode analisis yang digunakan yaitu network analysis dengan metode service area. Hasil dari penelitian ini bahwa area cakupan pelayanan di Kabupaten Bandung masih belum tercakup ke seluruh wilayah. Total luas cakupan pelayanan puskesmas berdasarkan jarak seluas 193.211,573 hektar dan total luas cakupan wilayah pelayanan puskesmas berdasarkan waktu tempuh seluas 2.281.709,838 hektar.
Aluminum Continues to Shine in Commercial Aircraft Applications
Authors: Sanders Robert , Marshall Graeme 
Published: March 2024

Abstract
During the 20th century, the use of aluminum alloys helped the Allied Powers win World War II and made modern global air travel possible. Continuous improvements in engine technology, alloys, and manufacturing methods enabled the development of practical and efficient aircraft with varying passenger capacity and range capability. Conventional wrought aluminum alloys make up 70-80% of the weight of single-aisle airliners. Aluminum sheet, plate, forgings, extrusions, and castings all continue to be utilized in modern aircraft construction. This article explores a brief history of the special alloys, tempers, and product forms required to meet the unique challenges of flight.
United States Advanced Ultra-Supercritical Component Test Facility with 760°C Superheater and Steam Turbine
Authors: Romanosky Robert , Cedro Vito , Purgert Robert , Phillips Jeffrey N. , Hack Horst , Weitzel Paul , Pschirer James , Claeys James 
Published: March 2024

Abstract
Following the successful completion of a 14-year effort to develop and test materials which would allow advanced ultra-supercritical (A-USC) coal-fired power plants to be operated at steam temperatures up to 760°C, a United States-based consortium has started on a project to build an A-USC component test facility, (A-USC ComTest). Among the goals of the facility are to validate that components made from the advanced alloys can perform under A-USC conditions, to accelerate the development of a U.S.-based supply chain for the full complement of A-USC components, and to decrease the uncertainty for cost estimates of future commercial-scale A-USC power plants. The A-USC ComTest facility will include a gas fired superheater, thick-walled cycling header, steam piping, steam turbine (11 MW nominal size) and valves. Current plans call for the components to be subjected to A-USC operating conditions for at least 8,000 hours by September 2020. The U.S. consortium, principally funded by the U.S. Department of Energy and the Ohio Coal Development Office with co-funding from Babcock & Wilcox, General Electric and the Electric Power Research Institute, is currently working on the Front-End Engineering Design phase of the A-USC ComTest project. This paper will outline the motivation for the project, explain the project’s structure and schedule, and provide details on the design of the facility.
Status of the Power Industry in China and Overall Progress for A-USC Technology
Authors: LIU Zhengdong 
Published: March 2024

Abstract
The Chinese power industry has experienced rapid development in the past decade. The newly built 600+°C ultra-super-critical (UCS) fossil fire power plants and pressed water reactor nuclear power plants in China are the world’s most advanced level technically and effectively. The available capacity of 600+°C UCS fossil fire power plant in China is more than 200 GW by the end of 2015, which has greatly contributed to the energy-saving and emission-reduction for China and the whole world. In China, the 610°C and 620°C advanced USC (A-USC) fossil fire power plants had been combined into the grid, 630°C A-USC fossil fire power plant is about to start to build, the feasibility of 650°C A-USC fossil fire power plant is under evaluation, 700°C AUSC fossil fire power plant has been included in the national energy development plan and the first Chinese 700°C A-USC testing rig had been put into operation in December 2015. The advanced heat resistant materials are the bottlenecking to develop A-USC fossil fire power plant worldwide. In this paper, the research and development of candidate heat resistant steels and alloys selected and/or used for 600+°C A-UCS fossil fire power plant in China is emphasized, including newly innovated G115 martensitic steel used for 630°C steam temperature, C-HRA-2 fully solid-solution strengthening nickel alloy used for 650°C steam temperature, C-HRA-3 solid-solution strengthening nickel alloy used for 680°C steam temperature, 984G iron-nickel alloy used for 680°C steam temperature, C-HRA-1 precipitation hardening nickel alloy and C700R1 solid-solution strengthening nickel alloy used for 700+°C steam temperature.
Materials Performance in the First U.S. Ultrasupercritical (USC) Power Plant
Authors: Crichton Michael , Shingledecker John 
Published: March 2024

Abstract
Early supercritical units such as American Electric Power (AEP) Philo U6, the world’s first supercritical power plant, and Eddystone U1 successfully operated at ultrasupercritical (USC) levels. However due to the unavailability of metals that could tolerate these extreme temperatures, operation at these levels could not be sustained and units were operated for many years at reduced steam (supercritical) conditions. Today, recently developed creep strength enhanced ferritic (CSEF) steels, advanced austenitic stainless steels, and nickel based alloys are used in the components of the steam generator, turbine and piping systems that are exposed to high temperature steam. These materials can perform under these prolonged high temperature operating conditions, rendering USC no longer a goal, but a practical design basis. This paper identifies the engineering challenges associated with designing, constructing and operating the first USC unit in the United States, AEP’s John W. Turk, Jr. Power Plant (AEP Turk), including fabrication and installation requirements of CSEF alloys, fabrication and operating requirements for stainless steels, and life management of high temperature components
Some Problems in Metal Material Service of Fossil Power Units in Mainland China
Authors: Jia Jianmin , Ma Hong , Cui Xionghua , Wang Junmin 
Published: March 2024

Abstract
Along with rapid development of thermal power industry in mainland China, problems in metal materials of fossil power units also change quickly. Through efforts, problems such as bursting due to steam side oxide scale exfoliation and blocking of boiler tubes, and finned tube weld cracking of low alloy steel water wall have been solved basically or greatly alleviated. However, with rapid promotion of capacity and parameters of fossil power units, some problems still occur occasionally or have not been properly solved, such as weld cracks of larger-dimension thick-wall components, and water wall high temperature corrosion after low-nitrogen combustion retrofitting.
Alloy 740H: Development of Fittings Capability for A-USC Applications
Authors: deBarbadillo John J. , Baker Brian A. , McCoy Stephen A. 
Published: March 2024

Abstract
INCONEL alloy 740H has been specified for tube and pipe for the boiler and heat exchanger sections of AUSC and sCO2 pilot plants currently designed or under construction. These systems also require fittings and complex formed components such as flanges, saddles, elbows, tees, wyes, reducers, valve parts, return bends, thin-wall cylinders and tube sheets. The initial evaluation of alloy 740H properties, leading to ASME Code Case 2702, was done on relatively small cross-section tube and plate. The production of fittings involves the use of a wide variety of hot or cold forming operations. These components may have complex geometric shapes and varying wall thickness. The utility industry supply chain for fittings is largely unfamiliar with the processing of age-hardened nickel-base alloys. Special Metals has begun to address this capability gap by conducting a series of trials in collaboration with selected fittings manufacturers. This paper describes recent experiences in first article manufacture of several components. The resulting microstructure and properties are compared to the published data for tubular products. It is concluded that it will be possible to manufacture most fittings with properties meeting ASME Code minima using commercial manufacturing equipment and methods providing process procedures appropriate for this class of alloy are followed. INCONEL and 740H are registered trademarks of Special Metals Corporation.
Influence of Data Scattering on Estimation of 100,000 Hours Creep Rupture Strength of Alloy 617 and Alloy 740 by Larson-Miller Method
Authors: Abe Fujio , Tabuchi Masaaki , Hayakawa Masao 
Published: March 2024

Abstract
The reasonable procedures for estimation of 100,000 h creep rupture strength have been investigated for Alloy 617 and Alloy 740 for A-USC power plants by Larson Miller method. The creep rupture data of longer duration than 500 h in the temperature range between 593 and 816 °C and between 600 and 850 °C were used for the analysis on Alloy 617 and Alloy 740, respectively. The data were obtained by Special Metals. In these temperature ranges, Ni3Al-γ’ can precipitate in Alloy 617 and Alloy 740 during creep. The maximum time to rupture was 40,126.7 and 24,066 h for Alloy 617 and Alloy 740, respectively. The rupture data for Alloy 617 exhibit large scattering, especially at 760 °C, showing a split into two groups. After eliminating the shorter time to rupture data at 760 °C, the regression analysis using the second order equation of Larson-Miller parameter gives us the Larson-Miller constant C of 12.70 and the 100,000 h creep rupture strength of 100 MPa at 700 °C. The regression analysis underestimates the constant C and corresponding 100,000 h creep rupture strength of Alloy 617, as shown by the regression curves locating below the rupture data at long times, while those locating above the rupture data at short times. The underestimation of constant C is caused by large data scattering. The linear extrapolation of log tr versus reciprocal temperature 1/T plot to 1/T = 0 at constant stresses gives us the constant C of 18.5, which is much larger than that by the regression analysis. Using an appropriate constant C of 18.45, the 100,000 h creep rupture strength of Alloy 617 is estimated to be 123 MPa at 700 °C. On the other hand, the rupture data for Alloy 740 exhibit only a little bit scattering. The regression analysis gives us C = 18.45, which agrees very well with that by the linear extrapolation of log tr versus 1/T plot to 1/T = 0. The 100,000 h creep rupture strength of Alloy 740 is estimated to be 214 and 109 MPa at 700 and 760 °C, respectively.
Correlation of Microstructure and Properties of Alloy 617B and Alloy C-263 for A-USC Power Plants
Authors: de Boer Nicole , Schraven Patrik 
Published: March 2024

Abstract
Nickel-based Alloy 617B (DIN 2.4673) and Alloy C-263 (DIN 2.4650) with high creep strength and good fabricability are promising material candidates for the design of next generation coal-fired “Advanced Ultra-Super-Critical A-USC” power plants with advanced steam properties and thus higher requirements on the material properties. Microstructural studies of the precipitation hardened alloy C-263 were performed with Electron Microscopy (TEM) with respect to their strengthening precipitates like carbides and intermetallic gamma prime. Specimens were subjected to different ageing treatments at elevated temperatures for different times. The microstructural results of the investigated nickel alloy C-263 are presented and discussed with respect to their correlation with required properties for A-USC, e.g. the mechanical properties, the creep resistance and the high temperature stability and compared to Alloy 617B. The manufacturing procedure for the prematernal and forgings as well as for thin walled tube components for A-USC power plants is presented.