Garuda - Garba Rujukan Digital

Quantitative Analysis of Liquid by Quick Freezing Into Ice Using Nd-YAG Laser-Induced Atmospheric Plasma Yulianto Ichwan, Mohamad Infrawan; Suyanto, Hery; Suliyanti, Maria Margaretha; Hedwig, Rinda; Pardede, Marincan; Kagawa, Kiichiro; Lie, Tjung Jie; Kurniawan, Koo Hendrik
Journal of Engineering and Technological Sciences Vol 37, No 1 (2005)
Publisher : ITB Journal Publisher, LPPM ITB

A new approach of quantitative analysis of liquid sample using laser ablation technique was developed. The liquid was immediately freezed using the mixture of dry ice and alcohol in weight ratio of 95% : 5%. As a result, an increase of the repulsion force from the sample surface will enable the generation of the laser-induced shock wave plasma which was difficult to carry out on liquid surface. The ice sample was then irradiated using Nd-YAG laser operated in its fundamental wavelength. In order to increase the signal to background ratio and to obtain a sharp atomic line spectra, helium gas was used instead of air. Dynamic characterization of the spatially integrated time profile of the Cu I 521.8 nm, Cu I 510.5 nm and HÎ± lines shows a shock excitation stage and cooling stage which is corresponded to our shock wave model even when the plasma was generated under atmospheric gas pressure. Further study of the time profile averaged temperature of the atmospheric plasma also shows an increase of temperature during the shock excitation stage followed by diminution of temperature during the cooling stage. An application of this technique was then applied to quantitative analysis of several liquid samples. A linear calibration curve which intercept at 0 point was obtained for all of the elements investigated in this study such as sodium, potassium, lithium, copper, silver, lead and aluminum. A detection limit of around 1 ppm was found for the above element. This new technique will contribute to a great extent of laser atomic emission spectrochemical analysis for liquid samples.

Quantitative Analysis of Liquid by Quick Freezing Into Ice Using Nd-YAG Laser-Induced Atmospheric Plasma Mohamad Infrawan Yulianto Ichwan; Hery Suyanto; Maria Margaretha Suliyanti; Rinda Hedwig; Marincan Pardede; Kiichiro Kagawa; Tjung Jie Lie; Koo Hendrik Kurniawan
Journal of Engineering and Technological Sciences Vol. 37 No. 1 (2005)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.eng.sci.2005.37.1.4

A new approach of quantitative analysis of liquid sample using laser ablation technique was developed. The liquid was immediately freezed using the mixture of dry ice and alcohol in weight ratio of 95% : 5%. As a result, an increase of the repulsion force from the sample surface will enable the generation of the laser-induced shock wave plasma which was difficult to carry out on liquid surface. The ice sample was then irradiated using Nd-YAG laser operated in its fundamental wavelength. In order to increase the signal to background ratio and to obtain a sharp atomic line spectra, helium gas was used instead of air. Dynamic characterization of the spatially integrated time profile of the Cu I 521.8 nm, Cu I 510.5 nm and HÎ± lines shows a shock excitation stage and cooling stage which is corresponded to our shock wave model even when the plasma was generated under atmospheric gas pressure. Further study of the time profile averaged temperature of the atmospheric plasma also shows an increase of temperature during the shock excitation stage followed by diminution of temperature during the cooling stage. An application of this technique was then applied to quantitative analysis of several liquid samples. A linear calibration curve which intercept at 0 point was obtained for all of the elements investigated in this study such as sodium, potassium, lithium, copper, silver, lead and aluminum. A detection limit of around 1 ppm was found for the above element. This new technique will contribute to a great extent of laser atomic emission spectrochemical analysis for liquid samples.

LOKAKARYA FUN LEARNING DENGAN FLOW, GRIT & GROWTH MINDSET [FUN LEARNING WORKSHOP WITH FLOW, GRIT & GROWTH MINDSET] Ihan Martoyo; Marincan Pardede; Julinda Pangaribuan; Mario Gracio A. Rhizma; Henri Putra Uranus; Junita Junita; Herman Kanalebe; Rocky T. Putra; Heri Yulian; Rianto Mangunsong; Rosmaya Nainggolan
Jurnal Sinergitas PKM & CSR Vol 3, No 1 (2018): October
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Three theories in educational psychology: (1) Flow (Mihaly Csikszentmihalyi), (2) Grit (Angela Duckworth), dan (3) Growth mindset (Carol Dweck) open the possibility for fun learning. Flow according to Csikszentmihalyi happens when the challenge in an activity is balanced with the necessary skill, so that one can experience flow during the activity. This feeling of flow is actually what makes learning fun. The concept of grit consists of two components: (1) perseverance and (2) passion for long term goals. Duckworth discovered that grit can predict success better than mere intellect (IQ). Growth mindset is a psychological state where one is not afraid to look stupid and therefore is more open to challenges because he/she focuses more on the learning process rather than momentary results. In the workshop in one private school in Tangerang, the three concepts were explained with concrete examples from movies and other illustrations. Furthermore, we did a demonstration in optical physics with simple equipments to simulate natural phenomena: A rainbow, the red evening sky, and laser deflection due to refractive index difference. Pre-test and post-test results after the fun learning workshop show that the concept of flow and grit is easier to comprehend by the teachers than growth mindset. After the workshop, there is an increase in the opinion that math and physic lessons can also be fun.

Lokakarya Fun Learning Bersama Sma Favorit Di Jakarta: Teori Grit Dan Growth Mindset Lebih Sulit Dari Flow Ihan Martoyo; Mario Gracio A. Rhizma; Rocky T. Putra; Rianto Mangunsong; Heri Yulian; Marincan Pardede; Junita Junita; Julinda Pangaribuan; Henri P. Uranus; Herman Kanalebe
Prosiding Konferensi Nasional Pengabdian Kepada Masyarakat dan Corporate Social Responsibility (PKM-CSR) Vol 2 (2019): Peran Perguruan Tinggi dan Dunia Usaha dalam Mempersiapkan Masyarakat Menghadapi Era I
Publisher : Asosiasi Sinergi Pengabdi dan Pemberdaya Indonesia (ASPPI)

Program Studi Teknik Elektro Universitas Pelita Harapan secara berkala melakukan lokakarya bersama berbagai sekolah untuk membagikan konsep fun learning, yang bertumpu pada 3 teori psikologi: teori flow, teori grit dan teori growth mindset. Walaupun proses pembelajaran modern sudah melibatkan banyak teknologi digital, kualitas pembelajaran itu sendiri diyakini lebih ditentukan oleh teori psikologi yang diterapkan daripada teknologi yang dipakai. Lokakarya kali ini dilakukan bersama guru-guru dari sebuah SMA favorit di Jakarta. Konsep fun learning yang dipresentasikan dilanjutkan dengan diskusi tentang kesulitan menerapkan konsep-konsep tersebut dalam aktivitas belajar yang sesungguhnya. Selain itu, dalam lokakarya juga dilakukan demonstrasi konsep-konsep fisika optik dengan laser dan kotak cahaya sederhana. Demonstrasi dengan peralatan sederhana ini diharapkan dapat dimanfaatkan untuk pembelajaran yang menyenangkan. Diskusi dengan para guru menunjukkan bahwa konsep grit dan growth mindset lebih sulit dipraktikkan dibandingkan konsep flow. Hasil pre-test dan post-test juga menunjukkan bahwa konsep flow lebih mudah ditangkap daripada teori grit dan growth mindset.

PELATIHAN PEMBUATAN ROBOT LINE FOLLOWER UNTUK MENINGKATKAN MINAT SISWA SISWI SMA TERHADAP STEM Junita, Junita; Uranus, Henri P.; A.R, M. Gracio; Pardede, Marincan; Mangunsong, Rianto; Yulian, Dwi Heri
Prosiding Konferensi Nasional Pengabdian Kepada Masyarakat dan Corporate Social Responsibility (PKM-CSR) Vol 6 (2023): INOVASI PERGURUAN TINGGI & PERAN DUNIA INDUSTRI DALAM PENGUATAN EKOSISTEM DIGITAL & EK
Publisher : Asosiasi Sinergi Pengabdi dan Pemberdaya Indonesia (ASPPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37695/pkmcsr.v6i0.2084

Perkembangan teknologi memungkinkan pengembangan sistem kecerdasan buatan dan otomatisasi dalam berbagai hal. Salah satunya adalah robotika. Berbagai efisiensi dan kecanggihan yang ditawarkan oleh teknologi robotika membuat banyak orang terpesona. Pesona robotika dapat meningkatkan keingintahuan dan minat siswa siswi terhadap STEM (science, technology, engineering, and mathematics), yang cenderung kurang. Dalam rangka meningkatkan minat siswa siswi terhadap STEM, Program Studi Teknik Elektro Universitas Pelita Harapan membuat pelatihan pembuatan robot untuk siswa siswi SMA. Pada pelatihan ini, para peserta diberikan pemaparan teori dasar untuk mengetahui cara kerja dari robot line follower, kemudian mereka diberikan modul robot yang dapat dirakit dengan bimbingan dari dosen dan laboran yang bertugas. Dari survei yang diisi oleh 35 peserta pelatihan, terdapat perubahan pendapat sebelum dan sesudah pelatihan mengenai merakit komponen listrik dan mekanik, yaitu penurunan sebesar 6% untuk yang merasa sulit dan tidak menyenangkan, penurunan 17% untuk yang merasa sulit tapi menyenangkan, dan peningkatan 23% untuk yang merasa mudah dan menyenangkan. Didapatkan juga perubahan pendapat mengenai Program Studi Teknik Elektro, sebelum dan sesudah pelatihan, yaitu penurunan sebesar 40% untuk yang berpendapat sulit dan tidak menyenangkan, peningkatan 31% untuk yang berpendapat sulit tapi menyenangkan, dan peningkatan 9% untuk yang berpendapat mudah dan menyenangkan. Kata Kunci: Robotika, STEM, Teknik Elektro

ANALISIS PENGARUH PELATIHAN ROBOT LINE FOLLOWER DAN LAMPU IOT DALAM MENINGKATKAN MINAT STEM SISWA SMA Junita, Junita; Uranus, Henri P.; Kanalebe, Herman; A.R, M. Gracio; Pardede, Marincan; Mangunsong, Rianto; Yulian, Dwi Heri; Prafo, Salfatore Yan; Susanto, Kathleen Gabriella; Yapply, Legolas
Prosiding Konferensi Nasional Pengabdian Kepada Masyarakat dan Corporate Social Responsibility (PKM-CSR) Vol 7 (2024): PKMCSR2024: Kolaborasi Hexahelix dalam Optimalisasi Potensi Pariwisata di Indonesia: A
Publisher : Asosiasi Sinergi Pengabdi dan Pemberdaya Indonesia (ASPPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37695/pkmcsr.v7i0.2548

This analysis aims to compare the effectiveness of two Community Service (PkM) activities in increasing high school students' interest in STEM (Science, Technology, Engineering, and Mathematics). The activities compared include line follower robot training and IoT (Internet of Things) light-making training. Both activities were designed to provide practical understanding and hands-on experience for students in the field of technology and engineering. This study used an experimental method by comparing students' perceptions of STEM before and after the training. The results of this analysis show that IoT light training was overall more effective in increasing students' interest in the Electrical Engineering program, with a positive perception increase of 58% in the "fun" category and a reduction in negative perceptions by 53%. Meanwhile, the line follower robot training showed a 37% increase in "fun" perception and a 39% decrease in the "not fun" perception. However, line follower robot training was more successful in improving students' technical understanding and skills, with an 18% reduction in the "difficult" perception and an 18% increase in the "easy" perception. In contrast, IoT light training saw a 4% decrease in the "easy" perception and a 1% increase in the "difficult" perception. This difference indicates that both types of training have their respective strengths in shaping students' interest and skills in STEM fields, and a training program that combines aspects of both approaches might yield more optimal results.

Title

Found 6 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 6 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 6 Documents
Search