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Mei Sulistyoningsih
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JITEK (Jurnal Ilmiah Teknosains)
Published by Universitas PGRI Semarang
ISSN : 24609986     EISSN : 24769436     DOI : https://doi.org/10.26877/jitek
Core Subject : Health, Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Mechanical Engineering Veterinary
JITek: Jurnal Ilmiah Teknosains 2476-9436 (media online) & 2460-9986 (media cetak) published scientific papers on the results of applied and natural science research covering the fields of science including engineering (civil, chemistry, architecture, electrical, mechanical, enviromental), food technology, agriculture, physics, biology, mathematics, chemistry and technical information. The manuscript must be original research, written in Bahasa Indonesia or English, and not be simultaneously submitted to another journal or conference. Manuscripts will be reviewed by an expert editor and managing editor. The journal has been indexed in Google Scholar, Dimensions and Crossref.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 10 Documents
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Search results for , issue "Vol 9, No 2/Nov (2023): JiTek" : 10 Documents clear
KLASIFIKASI PENGUNJUNG WISATA DI KOTA PAGAR ALAM DENGAN MENGGUNAKAN ALGORITMA K-NEAREST NEIGHBOR (K-NN) Syahri, Riduan; Puspita, Desi
(JITEK)Jurnal Ilmiah Teknosains Vol 9, No 2/Nov (2023): JiTek
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/jitek.v9i2/Nov.17329

Abstract

The city of Pagar Alam has many beautiful tourist options, fresh and cold air, and unique culture and culinary delights. So that it becomes an area that is visited by many local and foreign tourists. Of the many visitors who come, not a few of them leave impressions in the form of reviews of the places they have visited. The purpose of this study is to determine the classification and to determine the accuracy produced by the K-Nearest Neighbor (K-NN) method. The K-Nearest Neighbor (K-NN) method is used to classify visitor data on Pagar Alam tours. Tests carried out to get good accuracy results and evaluate using a confusion matrix. This research produces a classification system that can identify and classify Pagar Alam tourism visitors using the K-Nearest Neighbor (K-NN) algorithm with the results obtained the greatest accuracy with a value of k = 3 with 99% accuracy, K0 gets 98% precision, recall 100 and a fi-score of 99%, for k1 precision 100%, the recal is 89% and the fi-score is 92%, while for K2 the precision is 100%, the recal is 100%, the f1-score is 100%.
PEMESANAN PRODUK SOUVENIR BERBASIS WEB Gusmaliza, Debi; Sasmita, Sasmita; Setiadi, Dedi
(JITEK)Jurnal Ilmiah Teknosains Vol 9, No 2/Nov (2023): JiTek
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/jitek.v9i2/Nov.17303

Abstract

Pagar Alam City is known as a tourist city. Apart from being rich in ancient relics in the form of megalith stones, Pagar Alam is also famous for its natural beauty. This city makes agricultural tourism a direction for developing the people's economy, one of which is a business that sells souvenirs, where tourists from inside and outside always buy souvenirs as souvenirs for relatives and friends. The problem with ordering at this shop is that it still uses a manual system so the data entered is not computerized. In this research, a web-based souvenir product ordering application will be created. The programming languages used to create this program are Php and MySQL with the help of Visual Studio Code, Adobe Photoshop and Xampp tools. The research method used is the waterfall method which has stages such as the user requirements analysis stage, system design stage, implementation stage, verification stage, and finally the maintenance stage. The final result of this research is the creation of an application that can solve data processing problems quickly, precisely and accurately which is connected to a database, making it easier to create orders and recapitulate monthly order reports quickly and at any time if needed.
MIKROSTRUKTUR SENG OKSIDA YANG DISINTESIS MENGGUNAKAN EKSTRAK DAUN ANTING-ANTING Nurhasanah, Iis; Mukti, Nursanti Ajune; Paramita, Safira Arta
(JITEK)Jurnal Ilmiah Teknosains Vol 9, No 2/Nov (2023): JiTek
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/jitek.v9i2/Nov.17270

Abstract

Cakupan aplikasi yang luas dari seng oksida telah meningkatkan produksi seng oksida menggunakan berbagai metode fisika dan metode kimia. Penggunaan bahan kimia berbahaya dalam produksi seng oksida, mendorong pemanfaatan bahan alam yang ramah lingkungan untuk mereduksi dampak lingkungan.  Penelitian ini bertujuan untuk mensintesis seng oksida dengan memanfaatkan ekstrak daun anting-anting.  Seng oksida disintesis menggunakan proses presipitasi dari campuran larutan seng nitrat dengan ekstrak daun anting-anting.  Produk presipitasi dikalsinasi pada temperatur 500oC selama 3 jam.  Mikrostruktur produk presipitasi dianalisis menggunakan difraksi sinar-x dan scanning electron microscope.  Pola difraksi sinar-x menunjukkan intensitas puncak-puncak difraksi yang tajam dan tinggi mengindikasikan pembentukan material kristalinitas tinggi.  Analisis parameter-parameter struktur menghasilkan nilai yang bersesuaian dengan struktur wurtzite dari seng oksida.  Partikel-partikel berbentuk bulat dengan ukuran 100 nm teramati pada citra electron microscope. Analisis mikrostruktur mengindikasikan bahwa seng oksida kristalin berhasil disintesis. Ekstrak daun anting-anting potensial sebagai bahan alami untuk sintesis oksida logam.
KEANEKARAGAMAN JENIS LICHENES SEBAGAI BIOINDIKATOR KUALITAS UDARA DI OBJEK WISATA WONO SRENI INDAH KOTA JEPARA Kaswinarni, Fibria; Ananda, Titania Triska; Rachmawati, Rivanna Citraning
(JITEK)Jurnal Ilmiah Teknosains Vol 9, No 2/Nov (2023): JiTek
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/jitek.v9i2/Nov.16773

Abstract

Penelitian ini bertujuan untuk mengetahui keanekaragaman jenis Lichenes di Objek Wisata Wono Sreni Indah. Metode penelitian yang digunakan yaitu metode kualitatif dan kuantitatif. Sampling dilakukan di 2 stasiun pengamatan yaitu di Sreni dan di jalan menuju Sreni. Pengambilan sampel di jalan menuju Sreni dilakukan dengan cara teknik purposive sampling sedangkan pengambilan sampel di Sreni dilakukan dengan metode transek dalam plot. Hasil penelitian didapatkan 16 spesies Lichenes dari 7 family dengan tipe thalus foliose dan crustose. Dapat disimpulkan bahwa indeks keanekaragaman di Sreni tergolong tingkat sedang, sedangkan indeks keanekaragaman di jalan menuju Sreni tergolong rendah. Indeks keanekaragaman Lichenes tersebut dipengaruhi oleh faktor lingkungan meliputi suhu, kelembapan udara, dan intensitas cahaya.
SISTEM PENDUKUNG KEPUTUSAN REKOMENDASI HOMESTAY DI KOTA PAGAR ALAM DENGAN METODE TOPSIS Masdalipa, Risnaini; Setiadi, Dedi; Syahri, Riduan
(JITEK)Jurnal Ilmiah Teknosains Vol 9, No 2/Nov (2023): JiTek
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/jitek.v9i2/Nov.17247

Abstract

Technological developments can be used appropriately and properly will provide benefits and facilitate human work. The decision support system is an information system that can be used to assist in decision making, in this case, namely providing homestay recommendations to tourists who will visit the city of Pagar Alam which is a tourist destination in South Sumatra. Tourists who will stay at homestays must come directly to several homestays to ask about the rental price and facilities provided by the homestay manager. Sometimes people who are looking for a homestay don't immediately match the homestay they are visiting, so they have to find another homestay that is suitable and in accordance with the available budget so that this situation is not optimal, because the process for people to find a suitable homestay can take a long time. The method used is Technique for Order of Preference by Similiarty to Ideal Solution, which is a method for solving Multi Attribute Decision Making problems. The system development uses the Rapid Application Development (RAD) method, which is a process model used in incremental software development, especially for short processing times, which consists of three stages, namely requirements planning, design workshop, implementation. From the calculation results of the TOPSIS method with four criteria determined for several alternatives, according to the selection of criteria by the user, as well as the results of ranking alternatives with the highest preference value, namely 0.5962, and kia homestay as a recommendation according to what is expected by the user.
PEMBUATAN PAVING BLOCK DENGAN SERBUK BATU KARANG SEBAGAI SUBSTITUSI SEMEN MENGGUNAKAN METODE DRYMIX Rochmanto, Decky; Pratama, Andrie Mandala Yudha; Saputro, Yayan Adi; Qomaruddin, Mochammad; Roesdiana, Tira
(JITEK)Jurnal Ilmiah Teknosains Vol 9, No 2/Nov (2023): JiTek
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/jitek.v9i2/Nov.16918

Abstract

Utilizing dead rock as a cement additive in the manufacture of paving blocks, and the rock contains CaCO3 which includes limestone as in the content of cement which has lime content (CaO), the aim is to determine the effect of rock on the compressive strength value of paving blocks. Utilization of stone in the manufacture of paving blocks using a mixture of design 0%, 5%, 10%, and 15% of the weight of cement to be used. Manufacture of paving blocks using a ratio of 1: 3 sand cement, cement water factor 0.4 with molds 20 x 10 x 6 cm, compaction weight of 1 paving 3.52 kg and testing compressive strength at 7, 14 and 28 days, using the method (SNI 03- 0691-1996) paving block. From the analysis of compressive strength testing, it was found that the compressive strength of paving blocks increased towards normal paving blocks to produce the highest compressive strength with added rock in the 15% variation at the age of 28 days, which amounted to 45.1 MPa and included the quality of class A paving blocks with SNI 03-0691 (1996) standards. The compressive strength of the 5% variation at 28 days of age is 38.7 MPa and the compressive strength of the 10% variation at 28 days of age is 43.5 MPa. It can be seen that coral stone as a cement additive is able to improve the quality of compressive strength of paving blocks.
PENGARUH PARKIR DI BADAN JALAN (ON STREET PARKING) PASAR TRADISIONAL TERHADAP KINERJA JALAN Ristiyanto, Hartono Guntur; Abadi, Anugerah Ageng
(JITEK)Jurnal Ilmiah Teknosains Vol 9, No 2/Nov (2023): JiTek
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/jitek.v9i2/Nov.15688

Abstract

Keberadaan parkir di badan jalan berpotensi menurunkan kinerja jalan. Penurunan kinerja jalan tersebut perlu diantisipasi dengan berdasar informasi terkait kondisi parkir dan seberapa besar pengaruh parkir tersebut terhadap kinerja jalan. Oleh karena itu, pertanyaan penelitian ini adalah : bagaimana karakteristik parkir saat ini dan dampaknya terhadap kinerja jalan? Tujuan penelitian adalah menganalisis karakteristik dan pengaruh parkir terhadap kinerja jalan. Metode analisis kapasitas jalan menggunakan PKJI 2014. Keberadaan parkir di badan jalan oleh pengguna pasar tradisional berupa bentuk jumlah kendaraan parkir dan hambatan samping. Kedua jenis dampak tersebut baik terpisah maupun bersama-sama mempengaruhi kinerja jalan. Secara terpisah, kendaraan parkir berdampak terhadap : volume lalu lintas (Q), kapasitas (C), dan nilai bobot hambatan samping. Sedangkan secara bersama-sama, berpengaruh terhadap : derajat kejenuhan dan kecepatan (bebas maupun rata-rata). Hasil analisis menunjukkan, kinerja jalan yang paling terdampak adalah derajat kejenuhan. Parkir kendaraan di badan jalan mempunyai dampak terbesar terhadap derajat kejenuhan (DJ) pada hari Minggu, yaitu menaikkan nilai DJ sebesar 45%. Sementara dampak terkecil adalah terhadap kecepatan bebas jalan di hari Senin, yaitu menurunkan kecepatan sebesar 2%. Namun demikian, dampaknya terhadap kecepatan rata-rata jauh lebih besar daripada kecepatan bebas, yaitu menurunkan kecepatan sebesar 10%. Hal ini disebabkan karena nilai kecepatan rata-rata juga fungsi dari derajat kejenuhan
ACTIVE INTERMEDIATE REACTION MECHANISM FOR NITROCELLULOSE PRODUCTION Panjaitan, Jabosar Ronggur Hamonangan
(JITEK)Jurnal Ilmiah Teknosains Vol 9, No 2/Nov (2023): JiTek
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/jitek.v9i2/Nov.16838

Abstract

One of the most widely applied cellulose derivative products in industry is nitrocellulose which was produced through a nitration reaction between cellulose and nitric acid. In this research, the determination of the active intermediate reaction mechanism for nitrocellulose production was investigated. Four active intermediate mechanism models were used to predict the nitrocellulose formation reaction. Based on the results, it was found that models 3 and 4 which were active intermediate models that did not consider the effect of the sulfuric acid catalyst in the nitration reaction with irreversible nitration reaction. NO2+ ion was an active intermediate compound which had an important role in producing nitrocellulose. Sulfuric acid in the nitration reaction used to break down nitric acid into NO2+ ions without affecting the cellulose nitration process.
PENGEMBANGAN ALAT BANTU MESIN CUTTING BESI DENGAN SISTEM CONVEYOR SLIDING MENGGUNAKAN METODE RULA DAN REBA UNTUK MENGURANGI RISIKO GANGGUAN MUSKOLOSKELETAL Mirajhusnita, Isradias; Syaefulloh, Syaefulloh; Nurwildani, M. Fajar; Sugiono, Mohammad Cipto; Hariyanto, Hariyanto
(JITEK)Jurnal Ilmiah Teknosains Vol 9, No 2/Nov (2023): JiTek
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/jitek.v9i2/Nov.17365

Abstract

This The purpose of this study, to identify complaints of Musculoskeletal Disorders (MSDs) experienced by workers at UD. Andika Aluminum and Welding, these complaints include pain in the upper arm, waist, right forearm, right wrist, and right and left knees. The results of the RULA and REBA scores obtained from the highest cutting activities before the use of work tools currently resulted in a high risk of 76 and 75 and decreased after the development of tools, namely to 40 and 39. Assessment of work posture for cutting with ergofellow software obtained RULA scores and the highest REBA is with a RULA score of 7 7 and a REBA of 12 11, which is included in the category "Immediate action is required" and after repairs are made to the highest score the work station cuts the RULA and REBA scores decreased with a RULA of 4 4 and REBA of 2 3 which are categorized in the "no action required" level of action.
SISTEM INFORMASI PANGGIL KULI PROYEK (SIPAKUPROY) BERBASIS WEBSITE MENGGUNAKAN FRAMEWORK CODEIGNITER Bismi, Waeisul; Febriyani, Anisa; Ramadhan, Farid
(JITEK)Jurnal Ilmiah Teknosains Vol 9, No 2/Nov (2023): JiTek
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/jitek.v9i2/Nov.16198

Abstract

The development of Website-based information systems has provided significant benefits in terms of distance, time, and accessibility, particularly in the construction industry for finding skilled and experienced construction workers. However, challenges arise in finding qualified workforce due to the phenomenon of globalization. To overcome this issue, SIPAKUPROY is designed as an information system that supports these needs. Through SIPAKUPROY, users can access multiple construction worker teams, obtain detailed pricing information, and follow an efficient payment process. The transition process from manual to digital sales systems, known as digitalization, is a crucial key in implementing SIPAKUPROY, which requires suitable and reliable software and hardware. In the design of SIPAKUPROY, user-friendly design is the main focus, aiming to provide an easy and comfortable user experience. Overall, SIPAKUPROY offers a solution for individuals seeking reliable construction workers without personal connections in the industry. Thus, SIPAKUPROY makes a positive contribution in addressing the challenges faced in finding trustworthy construction workers in this era of globalization.

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