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All Journal IPTEK Journal of Proceedings Series Journal of Engineering and Technological Sciences JURNAL SOSIAL HUMANIORA (JSH) Jurnal Bimbingan Konseling Sewagati
Siti Machmudah
Institut Teknologi Sepuluh Nopember
Arts Humanities Computer Science & IT Education Engineering Languange, Linguistic, Communication & Media Public Health Social Sciences Other

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Synthesis of Polyhedral Magnetite Particles by Hydrothermal Process under High Pressure Condition Machmudah, Siti; Wahyudiono, Wahyudiono; Kanda, Hideki; Goto, Motonobu
Journal of Engineering and Technological Sciences Vol 48, No 6 (2016)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6878.865 KB) | DOI: 10.5614/j.eng.technol.sci.2016.48.6.8

Abstract

Magnetite particles were successfully generated by hydrothermal synthesis using water at subcritical conditions. By changing the temperature and pressure at subcritical water conditions, the thermodynamics and transport properties of the water can be controlled, thus enabling to manage the way of crystal formation, morphology, and particle size. In this work, the experiments were carried out at temperatures of 250 °C and 290 °C and a pressure of 10 MPa with a reactor made of SUS 316 in a batch system. The synthesized particles were dried in vacuum condition and characterized by SEM and XRD. The XRD patterns showed that magnetite particles were dominantly formed in the particle products with a black color. The results showed that the magnetite particles formed had diameters of around 60 nm in all experiments with irregular polyhedral shaped morphologies.
The Effect of Furnace Temperature and Precursor Concentration Ratio to The Characteristics of Nanocomposite ZnO-Silica Iva Maula; Widiyastuti Widiyastuti; Tantular Nurtono; Fadlilatul Taufany; Siti Machmudah; Sugeng Winardi
IPTEK Journal of Proceedings Series Vol 1, No 1 (2014): International Seminar on Applied Technology, Science, and Arts (APTECS) 2013
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2014i1.323

Abstract

Zinc Oxide is a semiconductor with relatively non-toxic, cheap and abundant properties which can be applied to LEDs. ZnO colloids are unstable due to further chemical reactions and coagulation so the addition of silica is needed to inhibit the growth of ZnO. ZnO was synthesized using sol-gel method by hydrolyze zinc acetate dihydrate in ethanol solution. Silica colloids was prepared by dissolving waterglass in distilled water at a temperature of 60 °C then passed into cation resin that has been activated using 2N HCl for ion exchange with Na+ to H+. In this study, the spray drying method was used to produce ZnO-silica nanocomposite. Morphological characterization of particles formed was analyzed using Scanning Electrostatic Microscope (SEM) (Zeiss Evo MA LS, Cambridge, England). X-Ray Diffraction (XRD) (Cu-Kα 1.54 A0, 40 kV, 30 mA, X’pert Pro, PAN alytical, Netherlands) and Fourier Transform Infrared (FTIR) (Therniscientific Nicolet iS10, US) were used to analyze the crystallinity and group functionalization, respectively. The results show that more particles are formed on 10% concentration volume of ZnO colloids rather than 5%.
Abstract of Invited Speaker : Research Opportunities in Japanese Universities and Tips for Scientific Publications Siti Machmudah
IPTEK Journal of Proceedings Series No 1 (2015): 1st International Seminar on Science and Technology (ISST) 2015
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (399.613 KB) | DOI: 10.12962/j23546026.y2015i1.1116

Abstract

This article gives information for researcher to do research in Japanese Universities based on author’s experience and some literatures. Researchers may obtain research opportunities with Japanese Universities through postdoctoral fellowship program provided by Japanese Society for the Promotion of Science (JSPS). Other financial supports to make research collaboration with Japanese Universities may also be applied through JSPS program. In addition, author summarized tips for scientific publications  both  in  international  conferences  and journals. The tips may help researchers to write a scientific article to be published in an international journal
The Effectiveness Of Group Counseling With A Religiously Integrated Cognitive Behavioral Therapy Approach To Improve Students’ Self-Effucacy And Self-Regulation Machmudah, Siti; Sutoyo, Anwar; Purwanto, Edy
Jurnal Bimbingan Konseling Vol 11 No 2 (2022): Regular Issue
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jubk.v11i2.57595

Abstract

Low self-efficacy may affect students’ academic performance realized in the practice of procrastination. In the same way, low self-regulation can make students difficult in regulating emotion and behavior, which for sure will affect their performance in learning process. Here, the students of Public Islamic Junior High School or MTs Negeri 1 Kudus were found to have low self-efficacy and self-regulation. Thus, the present student strived for examining the effectiveness of group counseling with religiously integrated cognitive behavioral therapy which focuses on Islamic beliefs, namely using shirah nabawiyah technique to improve students’ self-efficacy and self-regulation. As many as 18 students involved as the subjects of this study were grouped into two and researched using randomized pretest posttest group design. The findings have proved that the group counseling with religiously integrated cognitive behavioral therapy approach is effective to improve students’ self-efficacy and self-regulation. Further discussion of the implication and limitations can be found in the discussion chapter.
Identifikasi Permasalahan Mahasiswa Evaluasi Semester Program Akademik dan Vokasi di Institut Teknologi Sepuluh Nopember Surabaya Purwanto, Yuli; Setiawan, Setiawan; Sunawi, Sunawi; Iman Nurdjati, Fatkhul; Machmudah, Siti
JURNAL SOSIAL HUMANIORA (JSH) Vol 17, No 2 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24433527.v17i2.21982

Abstract

This study investigates the issues faced by students with Dispensation, Probation Semester Promotion, and Non-Promotion statuses based on evaluations from the 2021 Even Semester to the 2024 Odd Semester at Institut Teknologi Sepuluh Nopember, Surabaya. Using a quantitative descriptive approach, the research examines problems in semester evaluations. The population consists of 422 active students, with a sample of 252 students selected through Proportioned Stratified Random Sampling. Data was collected via questionnaires and interviews. Analysis employed the Guidance and Counseling Problem Checklist (DCM) in Higher Education, covering 11 topics through 56 Likert-scale statements. Problems were ranked based on Respondent Achievement Level (TCR) percentages. Findings reveal that the most significant issue is in the "Very Problematic" category. The top problem topic is Campus Adjustment (69.78%), with the leading issue being motivation to study (88.73%). The second issue is Future and Ambition (55.94%), with a focus on identifying self-potential (79.60%). Social Life and Organizational Activity ranks third (52.56%), primarily due to lack of organizational participation (60.79%). Lastly, Recreation and Hobbies (51.40%) highlights insufficient time for hobbies to boost enthusiasm (65.56%). These findings underscore key areas for student support interventions.
Penerapan Pangan Jajan Anak Sekolah (PJAS) pada SDN MOJO VI Surabaya dan Potensinya untuk dikembangkan menjadi ZONA Kuliner Halal Aman dan Sehat (KHAS) Kluster Pendidikan Tingkat Dasar Airlangga, Bramantyo; Rahmawati, Yeni; Juliastuti, Sri Rachmania; Darmawan, Raden; Machmudah, Siti; Aparamarta, Hakun Wirawasista; Roesyadi, Achmad; Sumarno, Sumarno; Rachmaniah, Orchidea
Sewagati Vol 9 No 4 (2025)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j26139960.v9i4.2511

Abstract

Makanan sehat mendukung sistem kekebalan tubuh, menjaga tubuh tetap kuat dan siap melawan infeksi dan penyakit. Adanya penerapan program Pangan Jajan Anak Sekolah (PJAS) di SDN MOJO VI Surabaya secara tidak langsung meningkatan kesadaran siswa sekaligus orang tua siswa akan pentingnya memilih jajan anak yang aman dan sehat. Hal ini tidak hanya bermanfaat bagi siswa di sekolah, namun dalam jangka panjang akan mempengaruhi kebiasaan makan keluarga. Penerapan PJAS pada kios-kios kantin sekolah merupakan langkah awal penerapan Sistem Jaminan Halal (SJH); mengingat kriteria PJAS yang sesuai adalah aman dan bermutu selain bergizi. Sehingga PJAS yang aman dan bermutu selangkah menuju PJAS halal. Pemberian pendampingan gratis untuk pengajuan sertifikasi halal dilakukan kepada setiap kios di SDN MOJO VI Surabaya: kantin Melati, Kenanga, Anggrek, dan Mawar. Kegiatan ini membawa keberhasilan bagi SDN Mojo VI Surabaya dalam meraih juara 1 Nasional dalam kategori PJAS. Penerapan PJAS sekaligus sertifikasi halal disetiap kios kantin di SDN Mojo sangat berpotensi untuk ditingkatkan menjadi Zona KHAS. Sehingga pihak pengelola Kantin SDN MOJO VI Surabaya tidak hanya menjamin kehalalan makanan tetapi juga menjamin kebersihan dan kesehatan jajan siswanya secara keseluruhan.
Co-Authors Achmad Roesyadi Airlangga, Bramantyo Anwar Sutoyo Aparamarta, Hakun Wirawasista Darmawan, Raden Edy Purwanto Fadlilatul Taufany Goto, Motonobu Hideki Kanda Iman Nurdjati, Fatkhul Iva Maula Kanda, Hideki Mitsuru Sasaki Motonobu Goto Purwanto, Yuli Rachmaniah, Orchidea Setiawan, Setiawan Sri Rachmania Juliastuti, Sri Rachmania Sumarno . Sunawi, Sunawi Tantular Nurtono Wahyudiono . Wahyudiono, Wahyudiono Widiyastuti Widiyastuti Winardi, Sugeng Yeni Rahmawati, Yeni Yui Matsunaga