Jurnal Cakrawala Ilmiah最新文献

REDESIGN KATUP GAS LIFT (CONTINUOUS) MENGGUNAKAN METODE ANALISIS NODAL UNTUK OPTIMASI PRODUKSI SUMUR BRAVO-011 DI PT PERTAMINA HULU ROKAN REGION 1 ZONA 4 FIELD LIMAU 重新设计气举（连续式）系统，采用节点分析方法，以优化在 PT PERTAMINA HULL ROCKAN 第 1 区第 4 油田（LIMAU）的 BAVO-011 号油田的生产。

Jurnal Cakrawala Ilmiah Pub Date : 2024-07-25 DOI: 10.53625/jcijurnalcakrawalailmiah.v3i11.8173

Sefilra Andalucia, Ekariza Ekariza, Bagas Juniar Kusuma Negara

{"title":"REDESIGN KATUP GAS LIFT (CONTINUOUS) MENGGUNAKAN METODE ANALISIS NODAL UNTUK OPTIMASI PRODUKSI SUMUR BRAVO-011 DI PT PERTAMINA HULU ROKAN REGION 1 ZONA 4 FIELD LIMAU","authors":"Sefilra Andalucia, Ekariza Ekariza, Bagas Juniar Kusuma Negara","doi":"10.53625/jcijurnalcakrawalailmiah.v3i11.8173","DOIUrl":"https://doi.org/10.53625/jcijurnalcakrawalailmiah.v3i11.8173","url":null,"abstract":"Sumur Bravo-011 merupakan salah satu sumur minyak di Lapangan Limau yang berproduksi menggunakan gas lift. Produktivitas Sumur Bravo-011 tergolong rendah, karena pengaruh penurunan tekanan reservoir dan diikuti peningkatan nilai watercut mencapai 95%. Dari data profil sumur dan struktur diketahui nilai tekanan reservoir sebesar 1500 Psi, tekanan dasar sumur sebesar 900 Psi, kedalaman sumur mencapai 4950,787 ft dan laju produksi 843 BPD. Berdasarkan analisis kurva IPR, Sumur Bravo-011 memiliki laju alir maksimum mencapai 1460,115 BPD, artinya sumur ini masih memiliki potensi untuk berproduksi lebih besar. Setelah dilakukan analisis nodal diketahui bahwa laju alir optimum yang dapat dicapai yaitu sebesar 980 BPD. Adanya potensial produksi tersebut, membuat perusahaan berusaha meningkatkan produksi sumur dengan melakukan redesign katup gas lift pada sumur tersebut. Redesign katup gas lift Sumur Bravo-011 dilakukan melalui tiga tahapan, yaitu tahap desain secara manual, kemudian dilanjutkan tahap desain secara simulasi serta tahap uji sensitivitas terhadap hasil desain yang diperoleh. Berdasarkan hasil desain secara manual, diketahui jumlah katup yang dibutuhkan sebanyak 4 unit dengan kedalaman setiap katup yaitu 1550 ft, 2500 ft, 3125 ft dan 3700 ft. Kemudian hasil tersebut dilanjutkan ke tahap desain menggunakan Simulator IPM Prosper dan didapatkan desain jumlah katup sebanyak 3 unit dengan kedalaman setiap katup yaitu 1337,8 ft, 1757,2 ft dan 2018,1 ft serta perkiraan laju produksi liquid sebesar 904,3 BPD dengan laju produksi minyak 45,2 BOPD. Selanjutnya dilakukan uji sensitivitas pada hasil desain tersebut dengan delapan opsi berbeda, dan didapatkan persentase oil gain dari masing-masing opsi yaitu 7,2%, 8,9%, 7,2%, 8,8%, 9,6%, 10,8%, 8,9% dan 9,8%. Dari 8 opsi uji sensitivitas tersebut, terdapat oil gain tertinggi yaitu opsi 6 dengan persentase sebesar 10,8%.","PeriodicalId":470943,"journal":{"name":"Jurnal Cakrawala Ilmiah","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141804289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ANALISIS BIAYA OPERASIONAL BULLDOZER RIPPING KOMATSUD375 PT BINA SARANA SUKSES SITE PT PRIMA MULIA SARANA SEJAHTERA 分析推土机开裂 Komatsud375 pt bina sarana sukses site pt prima mulia sarana sejahtera

Jurnal Cakrawala Ilmiah Pub Date : 2024-07-25 DOI: 10.53625/jcijurnalcakrawalailmiah.v3i11.8172

Maya Matofani, A. Azizah

{"title":"ANALISIS BIAYA OPERASIONAL BULLDOZER RIPPING KOMATSUD375 PT BINA SARANA SUKSES SITE PT PRIMA MULIA SARANA SEJAHTERA","authors":"Maya Matofani, A. Azizah","doi":"10.53625/jcijurnalcakrawalailmiah.v3i11.8172","DOIUrl":"https://doi.org/10.53625/jcijurnalcakrawalailmiah.v3i11.8172","url":null,"abstract":"Dalam kegiatan penambangan sangatlah berkaitan dengan biaya untuk mendukung target produksi. Biaya operasional sangatlah berpengaruh terhadap keuntungan atau kerugian perusahaan, sehingga perlu adanya analisis terhadap biaya tersebut. Penelitian ini menganalisis biaya operasional bulldozer ripping Komatsu D375 yang memiliki 2 unit Bulldozer pada kegiatan ripping dengan nomor unit DZ265 dan DZ262 yang bertujuan untuk mengetahui keefektifan produksi dari masing masing unit serta biaya operasional pada kegiatan ripping berlangsung. Proses analisis dilakukan dengan melakukan perhitungan terhadap produktivitas dan biaya operasional (bahan bakar, perbaikan, upah tenaga kerja) serta perhitungan terhadap pendapatan hasil ripping overburden. Maka dari hasil analisis tentang produktivitas, biaya operasional dan pendapatan maka unit yang lebih efektif dan efisien yaitu Bulldozer DZ265 dengan produktivtasnya sebesar 1481.04 Bern/Jam sedangkan Bulldozer DZ262 sebesar 1330.43 Bern/Jam faktor yang mempengaruhi perbedaan produktivitas yang eukup signifikan meliputi luas area ripping, pengawasan, keterampilan operator. Serta pada unit Bulldozer Komatsu DZ262 dibandingkan dengan unit Bulldozer DZ265, memiliki tingkat keefektifan yang lebih unggul dilihat dari 4 indikator yaitu 4 indikator yaitu physical availability, mechanical availability, use of availability dan effective utilization. Hal ini disebabkan oleh jam operasi, jam breakdown serta jam maintenance yang eukup berbanding jauh antara kedua unit tersebut pada bulan Maret 2023. Adapun total biaya operasional dari Bulldozer Komatsu D375 sebesar Rpl.266.916.353 dengan total pendapatan bersih yang telah dilakukan pengurangan dari biaya operasional, maka pada bulan Maret 2023 PT Bina Sarana Sukses mendapat keuntungan dari hasil ripping overburden sebesar Rp37.097.695.647","PeriodicalId":470943,"journal":{"name":"Jurnal Cakrawala Ilmiah","volume":"37 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141804261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PENGARUH METODE THE LEARNING CELL TERHADAP KEMAMPUAN MEMBACA PEMAHAMAN PADA SISWA KELAS VIII SMP NEGERI 7 PALEMBANG 学习细胞法对巴伦邦第七中学八年级学生阅读理解能力的影响

Jurnal Cakrawala Ilmiah Pub Date : 2024-03-25 DOI: 10.53625/jcijurnalcakrawalailmiah.v3i7.7578

Yanti Juniarti

{"title":"PENGARUH METODE THE LEARNING CELL TERHADAP KEMAMPUAN MEMBACA PEMAHAMAN PADA SISWA KELAS VIII SMP NEGERI 7 PALEMBANG","authors":"Yanti Juniarti","doi":"10.53625/jcijurnalcakrawalailmiah.v3i7.7578","DOIUrl":"https://doi.org/10.53625/jcijurnalcakrawalailmiah.v3i7.7578","url":null,"abstract":"Penelitian ini untuk mengetahui pengaruh metode The Learning Cell terhadap kemampuan membaca pemahaman siswa kelas VIII SMP Negeri 7 Palembang. Jenis penelitian eksperimen yang menggunakan sampel dalam kelas belajar (intact group) untuk diberi perlakuan. Sampel penelitian ini berjumlah 76 siswa yang terbagi menjadi dua kelas yaitu VIII.5 sebagai kelas kontrol yang menggunakan metode konvensional sebanyak 38 orang siswa dan kelas VIII.6 sebagai kelas eksperimen menggunakan metode The Learning Cell sebanyak 38 orang siswa. Teknik pengumpulan data menggunakan membaca pemahaman, sedangkan teknik analisis data menggunakan perhitungan uji-t dengan program SPSS. Berdasarkan hasil penelitian ini dapat diketahui nilai terendah tes awal 24,49 kelas eksperimen dan nilai terendah kelas kontrol 29,87. Nilai tertinggi untuk kelas eksperimen 85,65 dan kelas kontrol 84,68. Hasil tes akhir yang diperoleh nilai terendah kelas eksperimen 53,05 dan kelas kontrol 33.96. Nilai tertinggi kelas eksperimen adalah 100 dan kelas kontrol 82,86. Kesimpulan hasil penelitian ini adalah terdapat perbedaan yang signifikan kemampuan membaca pemahaman anatar siswa yang pembelajaranyya menggunakan metode The Learning Cell dan yang menggunakan pembelajaran konvensional.","PeriodicalId":470943,"journal":{"name":"Jurnal Cakrawala Ilmiah","volume":" 1058","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140382294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

STRATEGI BISNIS STARTUP MELALUI BUSINESS MODEL CANVAS: STUDI KASUS GOJEK DAN AIRBNB 通过商业模式画布制定初创企业战略：Gojek 和 Airbnb 案例研究

Jurnal Cakrawala Ilmiah Pub Date : 2024-01-27 DOI: 10.53625/jcijurnalcakrawalailmiah.v3i5.7423

K.M. Faisal Reza, KA. Noviansyah

{"title":"STRATEGI BISNIS STARTUP MELALUI BUSINESS MODEL CANVAS: STUDI KASUS GOJEK DAN AIRBNB","authors":"K.M. Faisal Reza, KA. Noviansyah","doi":"10.53625/jcijurnalcakrawalailmiah.v3i5.7423","DOIUrl":"https://doi.org/10.53625/jcijurnalcakrawalailmiah.v3i5.7423","url":null,"abstract":"This study explores the application of the Business Model Canvas (BMC) in formulating business strategies that enable innovation and sustainability, focusing on the successful startups Gojek and Airbnb as case studies. BMC, a strategic management tool, provides a structured approach for startups to dissect and optimize their business models. This research delves into how Gojek and Airbnb utilized BMC to identify unique value propositions, adapt to market dynamics, and sustain long-term growth. Through a qualitative analysis, the study highlights the significance of BMC in fostering continuous innovation, strategic adaptation, and scalability in the competitive startup ecosystem. The findings underscore the importance of a holistic approach in business model formulation, continuous iteration based on market feedback, and the strategic alignment of business components to achieve sustainability and competitiveness. This research contributes to the understanding of BMC's practical application in startup strategy development, offering insights and recommendations for startups aiming to navigate the complexities of the modern market landscape","PeriodicalId":470943,"journal":{"name":"Jurnal Cakrawala Ilmiah","volume":"9 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140492250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ANALISIS KENDALA OPERASIONAL PADA KOMPRESOR SKG X MILIK PT. P PRABUMULIH PADA PERIODE APRIL 2018 – MARET 2019 2018年4月至2019年3月，PT. P prabumuli对SKG X压缩机的操作限制分析

Jurnal Cakrawala Ilmiah Pub Date : 2023-10-26 DOI: 10.53625/jcijurnalcakrawalailmiah.v3i2.6725

None Azka Roby Antari, None Zulfan Yusuf Asdan

{"title":"ANALISIS KENDALA OPERASIONAL PADA KOMPRESOR SKG X MILIK PT. P PRABUMULIH PADA PERIODE APRIL 2018 – MARET 2019","authors":"None Azka Roby Antari, None Zulfan Yusuf Asdan","doi":"10.53625/jcijurnalcakrawalailmiah.v3i2.6725","DOIUrl":"https://doi.org/10.53625/jcijurnalcakrawalailmiah.v3i2.6725","url":null,"abstract":"The gas compressor engine is the main equipment at the Gas Compressor Station (SKG). The working principle is gas compression, the compressor has rotating impeller blades pushing the gas into the diffuser forcing the gas to move into the vessel until the pressure on the gas increases. At SKG X PT. P Prabumulih who supplies gas to PT. Pusri, there are 4 compressor units (A, B, C, D), where in one day three compressor units are operating, and one compressor unit is in stand-by condition or under maintenance so it does not operate. The total operating hours of all compressors in one day is 72 hours and total stand-by hours are 24 hours. This quantitative research analyzes compressor performance data to obtain operational constraints experienced by compressors and their impact on compressor performance. Based on the results of the analysis, the hours of operation and stand-by of the 4 compressor units during a year did not run normally, due to some troubles with the compressor, a total of 25,773 working hours, 9,075 hours of standby, 444 hours of damage/loss. No compressor works 100% full, compressor B has the worst breakdown hours with 173 hours (3.64% of the total breakdown hours). During the year, there were 59 occurrences of damage to the compressor consisting of 26 types of damage with the peak performance decline occurring between June and July, which resulted in a loss of 2% of productive hours per year. This certainly has an impact on the loss of production target volume.","PeriodicalId":470943,"journal":{"name":"Jurnal Cakrawala Ilmiah","volume":"13 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134909887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ANALISIS REALISASI BIAYA PADA KEGIATAN OVERBURDEN REMOVAL DI PT ABC KABUPATEN LAHAT PROVINSI SUMATERA SELATAN 南苏门答腊省 Lahat 县 Pt Abc 的覆盖层清理活动成本实现情况分析

Jurnal Cakrawala Ilmiah Pub Date : 2023-09-30 DOI: 10.53625/jcijurnalcakrawalailmiah.v3i1.6590

None M. Ikbal Aziz, None Lina Rianti, None Lendra Sagita Putri

{"title":"ANALISIS REALISASI BIAYA PADA KEGIATAN OVERBURDEN REMOVAL DI PT ABC KABUPATEN LAHAT PROVINSI SUMATERA SELATAN","authors":"None M. Ikbal Aziz, None Lina Rianti, None Lendra Sagita Putri","doi":"10.53625/jcijurnalcakrawalailmiah.v3i1.6590","DOIUrl":"https://doi.org/10.53625/jcijurnalcakrawalailmiah.v3i1.6590","url":null,"abstract":"Mining sector is very closely related to mechanical device utilization and is inseparable from cost so that production targets can be achieved. Operational costs can affect the company’s income, so an analysis of operational costs is necessary. This study analyzed the realization of operational costs in fleet 1 overburden removal activities to determine lost opportunities experienced by a company. The analysis process was conductued by identifying the target and actual production of overburden fleet 1. The production target of overburden removal was 15,000 BCM with the tools used 1 digging equipment and 3 hauling equipment and the operational cost consisted of solar cost, oil cost, filter cost, grease cost, tire cost, repair/maintenance cost and operator salary cost. The total operational cost for overburden removal activity was Rp237,579,500 with the overburden transportation cost of Rp29,500 for a distance of 1.2 Km, the gross income carned was Rp435,309,080. The factors that caused the lost opportunity were the unachieved production factor of overburden removal fleet 1 which was Rp7,190,920 and the mechanical equipment maintenance factor which was Rp103,261,000 with a lost opportunity of Rp110,451,920.","PeriodicalId":470943,"journal":{"name":"Jurnal Cakrawala Ilmiah","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136278734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ANALISIS REALISASI BIAYA OPERASIONAL PENGUPASAN COAL GETTING KHUSUS ALAT UTAMA PENAMBANGAN DI PT DUTA ALAM SUMATERA SITE PT XYZ KABUPATEN LAHAT PROVINSI SUMATERA SELATAN 在苏门答腊省南苏门答腊pt duta alam pt xyz lahat 区使用特殊采矿主要设备剥离煤炭的运营成本实现情况分析

Jurnal Cakrawala Ilmiah Pub Date : 2023-09-30 DOI: 10.53625/jcijurnalcakrawalailmiah.v2i12.6591

None M. Ikbal Aziz, None Lina Rianti, None Tia Oktarina

{"title":"ANALISIS REALISASI BIAYA OPERASIONAL PENGUPASAN COAL GETTING KHUSUS ALAT UTAMA PENAMBANGAN DI PT DUTA ALAM SUMATERA SITE PT XYZ KABUPATEN LAHAT PROVINSI SUMATERA SELATAN","authors":"None M. Ikbal Aziz, None Lina Rianti, None Tia Oktarina","doi":"10.53625/jcijurnalcakrawalailmiah.v2i12.6591","DOIUrl":"https://doi.org/10.53625/jcijurnalcakrawalailmiah.v2i12.6591","url":null,"abstract":"Mining activities will definitely require calculation in mining cost. Operational cost can effect the company’s revenue, so an analysis of operational costs is necessary. This study aimed to calculate the estimated production and actual production of coal getting in March 2023 and to calculate the operational costs of estimated production and actual production of coal getting in March 2023. The analysis process was carried out by determining the estimation and realization of coal getting production where the estimated production of coal getting was 35000 tons with 1 unit of digging equipment and 5 units of hauling equipment with operational costs for coal getting production incluiding the realization of diesel fuel of Rp76,926,810.00, oil of Rp500,000.00, operator salary of Rp5,400,000.00, repair/maintenance of Rp42,980,000.00, grease of Rp239,267.00, and Liugong Excavator filter of Rp300,000.00. those were lower than the estimated costs of diesel fuel of Rp103,647,600.00, oil of Rp4,000,000.00, operator salary of Rp10,800,000.00, repair/maintenance of Rp76,680,000.00, grease pf Rp3,800,000.00, and filters of Rp2,100,000.00. whereas for the Dongfeng Dump Truck, the actual costs of diesel was Rp25,000,000.00, oil cost was Rp360,000.00, operator salary cost was Rp25,000,000.00, spare parts cost was Rp270,000.00, grease cost was Rp656,355.00, filter cost was Rp300,000.00, and tires cost was Rp705,000.00 which were lower than the estimated cost of diesel fuel of Rp483,688,800.00, oil of Rp4,000,000.00, operator salary of Rp50,000,000.00, repair/maintenance of Rp76,680,000.00, grease of Rp3,800,000.00, filters of Rp2,100,000.00 and tires of Rp18,350,000.00. thus, the estmated operational cost was Rp777,589,300.00 and the realization was IDR 282,819,689.00.","PeriodicalId":470943,"journal":{"name":"Jurnal Cakrawala Ilmiah","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136278730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

UJI KUALITAS BAHAN BAKAR BIODIESEL DARI MINYAK JELANTAH ( PENGGORENGAN PECEL LELE) DENGAN PARAMETER UJI SPESIFIC GRAVITY 60/60 ˚F ASTM D-1298, DISTILASI ASTM D-86, VISKOSITAS KINEMATIK ASTM D-445, FLASH POINT PM ASTM D-93, POUR POINT ASTM D-97 DAN CETANE 利用废食用油（鲶鱼油炸机）进行生物柴油燃料质量测试，其比重为 60/60 ˚f astm d-1298，馏程为 astm d-86，运动粘度为 astm d-445，闪点为 pm astm d-93，倾点为 astm d-97 和十六烷值。

Jurnal Cakrawala Ilmiah Pub Date : 2023-09-25 DOI: 10.53625/jcijurnalcakrawalailmiah.v3i1.6538

None Rahma Nuryanti, None Ineke Febrina Anggraini, None Dian Kurnia Sari, None Sonya

{"title":"UJI KUALITAS BAHAN BAKAR BIODIESEL DARI MINYAK JELANTAH ( PENGGORENGAN PECEL LELE) DENGAN PARAMETER UJI SPESIFIC GRAVITY 60/60 ˚F ASTM D-1298, DISTILASI ASTM D-86, VISKOSITAS KINEMATIK ASTM D-445, FLASH POINT PM ASTM D-93, POUR POINT ASTM D-97 DAN CETANE","authors":"None Rahma Nuryanti, None Ineke Febrina Anggraini, None Dian Kurnia Sari, None Sonya","doi":"10.53625/jcijurnalcakrawalailmiah.v3i1.6538","DOIUrl":"https://doi.org/10.53625/jcijurnalcakrawalailmiah.v3i1.6538","url":null,"abstract":"Biodiesel refers to one alternative fuel replacing diesel fuel obtained from renewable materials such as vegetable oil / animal fats (cooking oil). Used cooking oil is cooking oil which has been repeatedly used. Repeated use of cooking oil is by cause harm to the consumers. One of the utilizations of used cooking oil is by converting it into biodiesel. This study aims ti find out the process of converting used cooking oil into biodiesel and to investigate the quality of biodiesel produced from converted used cooking oil based on the parameters of Spesific gravity 60/60˚ F ASTM D-1298, distillation ASTM D-86, kinematic viscosity ASTM D-445, flash point ASTM D-93, pour point ASTM D-97, and cetane index ASTM D-4737. The process of making biodiesel from used cooking oil was conducted by two processes, namely esterification dan transesterification. On the process of esterification, ratio of used cooking oil and methanol was 1:2 and H2SO4 as the catalyst. On the process transesterification, on the other hand, the ratio of oil resulted from ester and methanol was 1:2 with NaOH as catalyst. Based on the analysis resul, Spesific gravity 60/60˚ F test showed 0.8562, 0.8569, 0.8569 (on specs), distillation on temperature 90% werw 340, 351 and 341 (on specs), kinematic viscosity resul showed 1,98 (off specs), flash point PM was 130˚ C, and 132˚ C (on specs), pour point result were 15˚ C, 17˚ C and 17˚ C (on specs), and cetane index result showed 51, 52, 51,5 (on specs).","PeriodicalId":470943,"journal":{"name":"Jurnal Cakrawala Ilmiah","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135816126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

FAKTOR- FAKTOR YANG MEMPENGARUHI KINERJA SISTEM INFORMASI AKUNTANSI PADA RS. PANTI WALUYO SURAKARTA 影响日惹瓦鲁约疗养院会计信息系统性能的因素

Jurnal Cakrawala Ilmiah Pub Date : 2023-08-24 DOI: 10.53625/jcijurnalcakrawalailmiah.v2i12.6385

None Enggi Silvia Tiarawati, None Ismunawan

引用次数: 0

ANALISIS FAKTOR-FAKTOR YANG BERPENGARUH TERHADAP PEMULIHAN BROMAGE SCORE PASIEN PASCA ANESTESI SPINAL DI RUMAH SAKIT KHUSUS BEDAH JATIWINANGUN 分析影响哥伦比亚治疗后脊髓麻醉患者康复的因素

Jurnal Cakrawala Ilmiah Pub Date : 2023-08-24 DOI: 10.53625/jcijurnalcakrawalailmiah.v2i12.6384

None Rismawati, None Tophan Heri Wibowo, None Arlyana Hikmanti

{"title":"ANALISIS FAKTOR-FAKTOR YANG BERPENGARUH TERHADAP PEMULIHAN BROMAGE SCORE PASIEN PASCA ANESTESI SPINAL DI RUMAH SAKIT KHUSUS BEDAH JATIWINANGUN","authors":"None Rismawati, None Tophan Heri Wibowo, None Arlyana Hikmanti","doi":"10.53625/jcijurnalcakrawalailmiah.v2i12.6384","DOIUrl":"https://doi.org/10.53625/jcijurnalcakrawalailmiah.v2i12.6384","url":null,"abstract":"Suatu blok neuraksial yang disebut anestesi spinal terjadi ketika obat anestesi lokal atau ajuvan dimasukkan ke rongga subarachnoid. Hal ini dapat menghilangkan sensasi dan memblokir fungsi motorik. Setelah anestesi spinal diruang pemulihan, motorik pasien dinilai dengan bromage score. Ada faktor-faktor yang memengaruhi waktu pemulihan, kecemasan dan gangguan neurologis seperti paratesi muncul sebagai akibat pemulihan yang lama. Tujuan dari penelitian ini adalah untuk mengetahui faktor-faktor yang berpengaruh terhadap pemulihan bromage score pasien pasca anestesi spinal di Rumah Sakit Khusus Bedah Jatiwinangun. Penelitian ini menggunakan metode deskriptif korelasional dengan pendekatan cross-sectional. Penelitian ini melibatkan 65 responden, dan data dikumpulkan melalui lembar observasi. Hasil penelitian menunjukkan bahwa status fisik ASA memiliki nilai ρ value 0,000 < α 0,05, dan nilai uji corelasi coefficient=0,763 menunjukkan keeratan hubungan sedang dan korelasi positif. Usia memiliki nilai ρ value 0,000 < α 0,05, dan nilai uji corelasi coefficient=0,873 menunjukkan keeratan hubungan kuat dan korelasi positif. Untuk jenis kelamin nilai ρ value 0,033 < α 0,05, dan nilai uji Contingensi Coefficient=0,256. Kesimpulan pemulihan bromage score pasien pasca anestesi spinal di Rumah Sakit Khusus Bedah Jatiwinangun dipengaruhi oleh status fisik ASA, usia, dan jenis anestesi","PeriodicalId":470943,"journal":{"name":"Jurnal Cakrawala Ilmiah","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134983513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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