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All Journal Jurnal Pengabdian Teknologi Tepat Guna EINSTEIN (E-JOURNAL) IPER (Indonesian Physics Education Research)
Doloksaribu, Maryati Evivani
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Religion Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Other

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Pendampingan Peningkatan Usaha Jamu Tradisional Melalui Penerapaan Teknologi Tepat Guna Di Desa Medan Krio Sipahutar, Herbert; Panggabean, Deo Demonta; Doloksaribu, Maryati Evivani; Effiyanti, Tri; Panggabean, Jonny Haratua; Harahap, Mukti Hamjah; Syah, Dedy Husrizal
JURNAL PENGABDIAN TEKNOLOGI TEPAT GUNA Vol 5 No 3 (2024): Teknologi Tepat Guna (JPTTG)
Publisher : Universitas Sahid Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47942/jpttg.v5i3.1859

Abstract

Kegiatan pengabdian pada masyarakat ini dilaksanakan di Desa Medan Krio Kecamatan Sunggal Kabupaten Deli Serdang. Yang menjadi mitra adalah industri rumah tangga yaitu usaha jamu tradisional yang dikelola Ibu Deli Sandra. Permasalahan yang dihadapi mitra diantaranya yaitu teknologi pengolahan masih tradisional sehingga mitra mengalami kesulitan dalam memenuhi kuantitas Produksi jamu yang dibutuhkan dalam waktu singkat, khususnya teknologi dalam pemerasan dan penggiling bahan baku, dan minimnya pengetahuan mitra dalam pencatatan pembukuan usaha yang baik. Sehubungan dengan permasalahan yang dihadapi mitra, pada program pengabdian kepada masyarakat ini dilakukan dengan pendampingan peningkatan usaha jamu melalui transfer alat/mesin penggiling bahan baku pembuatan jamu dan pelatihan pembukuan. Metode yang digunakan untuk mencapai tujuan kegiatan pengabdian ini adalah metode pendampingan, praktik dan pelatihan. Kegiatan pengabdian masyarakat ini telah menghasilkan teknologi tepat guna berupa 1 unit mesin penggiling bahan baku jamu, buku kas untuk pembukuan usaha, peningkatan produksi dan keterampilan menulis pembukuan usaha.
IDENTIFICATION OF SUBSURFACE SOIL LAYERS USING GEOELECTRIC METHOD IN ENVIRONMENT 2 OF RIANIATE VILLAGE TAPANULI SELATAN REGENCY Kristina; Doloksaribu, Maryati Evivani
EINSTEIN (e-Journal) Vol. 12 No. 3 (2024): EINSTEIN (e-Journal)
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ein.v12i3.48965

Abstract

A research on the identification of subsurface layers using the schlumberger configuration geoelectric method has been carried out on the coast of Lake Siais Environment 2, Rianiate Village, South Tapanuli Regency. With the aim of knowing the identification of subsurface layers, rock types, resistivity values, 2D contour cross section using Res2DinV software and the relationship of the resistivity value of the subsurface layer with climatology data. The results collected on 3 tracks with a length of 155m have a resistivity value of 133Ωm – 3389Ωm on the first track, the second track has 140Ωm - 2768Ωm and the third track 705Ωm - 4358Ωm. The results were processed by Res2DinV software to obtain a 2D cros section. As for the relationship of field data to BMKG data, rainfall has decreased from the last five years from 3744 mm – 3534 mm/year, humidity has decreased by 0,01762% each year, air temperature has increased by 0,09270 0C. From these results, resulting in changes in resistivity value in the subsurface.
Development of Problem-Solving Instruments Test at Rotational Dynamics and Equilibrium of Rigid Bodies Topic Sipahutar, Angelson Fery Estomihi; Doloksaribu, Maryati Evivani
(IPER) Indonesian Physics Education Research Vol. 5 No. 2 (2024): IPER (Indonesian Physics Education Research)
Publisher : UNIVERSITAS NEGERI MEDAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/iper.v5i2.56295

Abstract

The ability to think at a higher level (HOTS) refers to the cognitive thinking process of students at a higher level, which evolves from various cognitive concepts and learning taxonomies, such as problem-solving methods. Based on the observations conducted by researchers at SMAN 5 Medan, the current assessment does not prioritize problem-solving skills. This research aims to develop a test instrument that can measure problem-solving skills in students with a high level of validity and reliability. The method used in this development is the research and development model ADDIE (Analysis, Design, Development, Implementation, and Evaluation). In summary, the steps in this development include 1) problem identification and analysis. 2) designing a problem-solving test instrument. 3) developing the problem-solving test instrument to a suitable level. 4) testing the problem-solving test instrument on a small and large scale. 5) analysis the validity of the test instrument and the quality of test items. The result of this research is a developed problem-solving test instrument in the form of essays, meeting the criteria for a high-quality test instrument, and suitable test items.
EXPERIMENTAL STUDY OF BORATE-BASED GLASS MEDIUM MATERIAL AND HUTA GINJANG QUARTZ SAND THROUGH MELT-QUENCHING TECHNIQUE Pangabean, Jonny Haratua; Hutahaean, Juniar; Sihombing, Luli Warty; Doloksaribu, Maryati Evivani; Rajagukguk, Juniastel
EINSTEIN (e-Journal) Vol. 13 No. 1 (2025): EINSTEIN (e-Journal)
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/eins.v13i1.64965

Abstract

This research aims to produce a glass material based on quartz sand and borate compounds that can later be applied as a host matrix of rare earth ions as optical amplifiers. The research stages began with exploring quartz sand from Huta Ginjang, cleaning, grinding using a ball-mill and mixing with several other compounds namely Boron oxide (B(2) O3), barium oxide (BaO) and sodium oxide (Na2) O. The calculation and weighing process is carried out to obtain the mass of each compound to be used. The composition of each compound is shown through the chemical formula (x)Quartz sand + (60- x)B(2)O(3)+ 10BaO + 30Na2O (where x = 0; 2.5; 5; 10; 15; 20 mol%). The next step is the melting and molding process using the melt-quenching method. Through this experiment, a homogeneous and more transparent glass medium with optimum composition for each former and modifier compound was obtained.
IMPROVEMENT OF BIOPLASTIC CHARACTERISTICS FROM TAPIOCA WASTE USING TITANIUM DIOXIDE AS A FILLER Sipayung, Esther Permata; Doloksaribu, Maryati Evivani
EINSTEIN (e-Journal) Vol. 13 No. 1 (2025): EINSTEIN (e-Journal)
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/eins.v13i1.65201

Abstract

The use of conventional plastics that are difficult to decompose so that the accumulation of plastic waste can cause various problems in the environment. One way to overcome this problem is to replace petroleum-based plastics with other materials that have similar characteristics but are made from renewable materials and have biodegradable properties so that they can decompose naturally in a relatively faster time. Cassava is a polysaccharide containing starch with a high amylopectin content but lower than sticky rice, namely 83% amylopectin and 17% amylose. Tapioca dregs are waste that rots quickly if not processed further. Therefore, efforts are needed to utilize tapioca waste. The addition of Titanium Oxide is very suitable as an antibacterial agent because it is economical, has good mechanical stability, thermal stability, absorbs ultraviolet light, has a photocatalytic effect, and has a large surface area, especially in the manufacture of Bioplastics. Titanium oxide as a filler in bioplastics from tapioca waste can improve the characteristics of bioplastics. In this study, the water resistance value of biodegradable plastics was the highest, namely 47.73%. Titanium Oxide as a filler affects the tensile strength of bioplastics from tapioca waste. The highest tensile stress was obtained at a percentage of 0.8307 MPa, the highest strain was obtained at a percentage of 0.0951%, and the highest modulus of elasticity was 11.4411 MPa. In the biodegradability test with a value of 47.77% with the addition of titanium oxide filler, it meets the requirements to be used as a basic material for biodegradable plastic.
Co-Authors Dedy Husrizal Syah, Dedy Husrizal Herbert Sipahutar, Herbert Jonny Haratua Panggabean, Jonny Haratua Juniar Hutahaean Juniastel Rajagukguk, Juniastel Kristina Mukti Hamjah Harahap, Mukti Hamjah Pangabean, Jonny Haratua Sembiring, Rinawati Sihombing, Luli Warty Sipahutar, Angelson Fery Estomihi Sipayung, Esther Permata Tri Effiyanti