soka hadiati - Academia.edu (original) (raw)

Papers by soka hadiati

Research paper thumbnail of Pengaruh Doping Strontium pada Lapisan Tipis BaZr0,20Ti0,80O3

Jurnal Fisika dan Aplikasinya, 2013

Lapisan tipis Barium Zirconium Titanat (BaZr0,20Ti0,80O3/ BZT) didoping strontium (Sr) 1% dan 3% ... more Lapisan tipis Barium Zirconium Titanat (BaZr0,20Ti0,80O3/ BZT) didoping strontium (Sr) 1% dan 3% telah berhasil ditumbuhkan di atas substrat Pt/Si. Lapisan tipis dideposisi menggunakan metode Chemical Solution Deposition (CSD) yang disiapkan dengan spin coater dengan kecepatan putar 4000 rpm dan suhu annealingnya 800 • C. Hasil karakterisasi XRD menunjukkan adanya puncak-puncak milik BZT dan terjadi pergeseran puncak setelah didoping Sr. Refinement dengan analisis Rietveld menggunakan program GSAS dilakukan untuk menunjukan doping Sr telah masuk dalam senyawa BZT dan hasil analisisnya menunjukkan parameter kisi semakin besar seiring bertambahnya Sr. Hasil karakterisasi dari SEM menunjukkan permukaan lapisan tipis BSZT telah rata di atas substrat Pt/Si dan seiring penambahan Sr ukuran butirnya semakin kecil.

Research paper thumbnail of Development of Higher Order Thinking Skills Assessment Refer the Theory of Bloom in Laboratory Work

AL-ISHLAH: Jurnal Pendidikan

Higher-order thinking skills (HOTS) are one of the important components that students must master... more Higher-order thinking skills (HOTS) are one of the important components that students must master to be successful in the 21st century. The HOTS of students in several regions in Indonesia is low because HOTS-based learning and the instruments are not appropriate. This study aims to determine the validity and reliability of the HOTS assessment content, empirical, and constructs referring to bloom theory in laboratory work. The development model used is the Plomp development model, which consists of five stages: initial investigation, design, realization/construction, test, evaluation and revision, and implementation. The HOTS assessment was proven relevant by experts and then distributed to 70 Physics Education students. The HOTS assessment was analyzed by rash model theory analysis with the Winstep program to obtain empirical validity. SEM (Structural Equation Model) was used to obtain construct validity. The results showed that the HOTS assessment was valid and reliable. The resul...

Research paper thumbnail of The Effect of Laboratory Work Style and Reasoning with Arduino to Improve Scientific Attitude

International Journal of Instruction

This study aims to examine students' reasoning based on the model in each laboratory work style a... more This study aims to examine students' reasoning based on the model in each laboratory work style and find the effect on scientific attitude and student activity. This study uses a quantitative approach with the experimental method. The study was conducted in three classes with different lab work styles. Arduino and sensors were used as a measurement apparatus in Ohm's law experiments that will stimulate students' reasoning in each lab work. The measuring instruments consist of a scientific attitude scale, observation sheet, and worksheet. A descriptive statistical analysis was used to describe students' reasoning in the three laboratory work styles. The improvement of scientific attitude and activities were analyzed by normalized gain. The effects of the three types of lab work to scientific attitudes were analyzed by analysis of variance (ANOVA). The results show that the style of lab work gives rise to various students' reasoning. Observations show that many students solve problems in the experiment by reasoning to improve the measurement model. Problem-solving laboratory work is effective to improve activities and scientific attitudes. This study has succeeded to discover alternative concepts in the laboratory work with reasoning based on models.

Research paper thumbnail of The Effect of Laboratory Work Style and Reasoning with Arduino to Improve Scientific Attitude

This study aims to examine students' reasoning based on the model in each laboratory work style a... more This study aims to examine students' reasoning based on the model in each laboratory work style and find the effect on scientific attitude and student activity. This study uses a quantitative approach with the experimental method. The study was conducted in three classes with different lab work styles. Arduino and sensors were used as a measurement apparatus in Ohm's law experiments that will stimulate students' reasoning in each lab work. The measuring instruments consist of a scientific attitude scale, observation sheet, and worksheet. A descriptive statistical analysis was used to describe students' reasoning in the three laboratory work styles. The improvement of scientific attitude and activities were analyzed by normalized gain. The effects of the three types of lab work to scientific attitudes were analyzed by analysis of variance (ANOVA). The results show that the style of lab work gives rise to various students' reasoning. Observations show that many students solve problems in the experiment by reasoning to improve the measurement model. Problem-solving laboratory work is effective to improve activities and scientific attitudes. This study has succeeded to discover alternative concepts in the laboratory work with reasoning based on models.

Research paper thumbnail of Teamwork quality and project success in software development: A survey of agile development teams

Small, self-directed teams are central in agile development. This article investigates the effect... more Small, self-directed teams are central in agile development. This article investigates the effect of teamwork quality on team performance, learning and work satisfaction in agile software teams, and whether this effect differs from that of traditional software teams. A survey was administered to 477 respondents from 71 agile software teams in 26 companies and analyzed using structural equation modeling. A positive effect of teamwork quality on team performance was found when team members and team leaders rated team performance. In contrast, a negligible effect was found when product owners rated team performance. The effect of teamwork quality on team members´learning and work satisfaction was strongly positive, but was only rated by the team members. Despite claims of the importance of teamwork in agile teams, this study did not find teamwork quality to be higher than in a similar survey on traditional teams. The effect of teamwork quality on team performance was only marginally greater for the agile teams than for the traditional teams.

Research paper thumbnail of Pengaruh Doping Strontium pada Lapisan Tipis BaZr0,20Ti0,80O3

Jurnal Fisika dan Aplikasinya, 2013

Lapisan tipis Barium Zirconium Titanat (BaZr0,20Ti0,80O3/ BZT) didoping strontium (Sr) 1% dan 3% ... more Lapisan tipis Barium Zirconium Titanat (BaZr0,20Ti0,80O3/ BZT) didoping strontium (Sr) 1% dan 3% telah berhasil ditumbuhkan di atas substrat Pt/Si. Lapisan tipis dideposisi menggunakan metode Chemical Solution Deposition (CSD) yang disiapkan dengan spin coater dengan kecepatan putar 4000 rpm dan suhu annealingnya 800 • C. Hasil karakterisasi XRD menunjukkan adanya puncak-puncak milik BZT dan terjadi pergeseran puncak setelah didoping Sr. Refinement dengan analisis Rietveld menggunakan program GSAS dilakukan untuk menunjukan doping Sr telah masuk dalam senyawa BZT dan hasil analisisnya menunjukkan parameter kisi semakin besar seiring bertambahnya Sr. Hasil karakterisasi dari SEM menunjukkan permukaan lapisan tipis BSZT telah rata di atas substrat Pt/Si dan seiring penambahan Sr ukuran butirnya semakin kecil.

Research paper thumbnail of Development of Higher Order Thinking Skills Assessment Refer the Theory of Bloom in Laboratory Work

AL-ISHLAH: Jurnal Pendidikan

Higher-order thinking skills (HOTS) are one of the important components that students must master... more Higher-order thinking skills (HOTS) are one of the important components that students must master to be successful in the 21st century. The HOTS of students in several regions in Indonesia is low because HOTS-based learning and the instruments are not appropriate. This study aims to determine the validity and reliability of the HOTS assessment content, empirical, and constructs referring to bloom theory in laboratory work. The development model used is the Plomp development model, which consists of five stages: initial investigation, design, realization/construction, test, evaluation and revision, and implementation. The HOTS assessment was proven relevant by experts and then distributed to 70 Physics Education students. The HOTS assessment was analyzed by rash model theory analysis with the Winstep program to obtain empirical validity. SEM (Structural Equation Model) was used to obtain construct validity. The results showed that the HOTS assessment was valid and reliable. The resul...

Research paper thumbnail of The Effect of Laboratory Work Style and Reasoning with Arduino to Improve Scientific Attitude

International Journal of Instruction

This study aims to examine students' reasoning based on the model in each laboratory work style a... more This study aims to examine students' reasoning based on the model in each laboratory work style and find the effect on scientific attitude and student activity. This study uses a quantitative approach with the experimental method. The study was conducted in three classes with different lab work styles. Arduino and sensors were used as a measurement apparatus in Ohm's law experiments that will stimulate students' reasoning in each lab work. The measuring instruments consist of a scientific attitude scale, observation sheet, and worksheet. A descriptive statistical analysis was used to describe students' reasoning in the three laboratory work styles. The improvement of scientific attitude and activities were analyzed by normalized gain. The effects of the three types of lab work to scientific attitudes were analyzed by analysis of variance (ANOVA). The results show that the style of lab work gives rise to various students' reasoning. Observations show that many students solve problems in the experiment by reasoning to improve the measurement model. Problem-solving laboratory work is effective to improve activities and scientific attitudes. This study has succeeded to discover alternative concepts in the laboratory work with reasoning based on models.

Research paper thumbnail of The Effect of Laboratory Work Style and Reasoning with Arduino to Improve Scientific Attitude

This study aims to examine students' reasoning based on the model in each laboratory work style a... more This study aims to examine students' reasoning based on the model in each laboratory work style and find the effect on scientific attitude and student activity. This study uses a quantitative approach with the experimental method. The study was conducted in three classes with different lab work styles. Arduino and sensors were used as a measurement apparatus in Ohm's law experiments that will stimulate students' reasoning in each lab work. The measuring instruments consist of a scientific attitude scale, observation sheet, and worksheet. A descriptive statistical analysis was used to describe students' reasoning in the three laboratory work styles. The improvement of scientific attitude and activities were analyzed by normalized gain. The effects of the three types of lab work to scientific attitudes were analyzed by analysis of variance (ANOVA). The results show that the style of lab work gives rise to various students' reasoning. Observations show that many students solve problems in the experiment by reasoning to improve the measurement model. Problem-solving laboratory work is effective to improve activities and scientific attitudes. This study has succeeded to discover alternative concepts in the laboratory work with reasoning based on models.

Research paper thumbnail of Teamwork quality and project success in software development: A survey of agile development teams

Small, self-directed teams are central in agile development. This article investigates the effect... more Small, self-directed teams are central in agile development. This article investigates the effect of teamwork quality on team performance, learning and work satisfaction in agile software teams, and whether this effect differs from that of traditional software teams. A survey was administered to 477 respondents from 71 agile software teams in 26 companies and analyzed using structural equation modeling. A positive effect of teamwork quality on team performance was found when team members and team leaders rated team performance. In contrast, a negligible effect was found when product owners rated team performance. The effect of teamwork quality on team members´learning and work satisfaction was strongly positive, but was only rated by the team members. Despite claims of the importance of teamwork in agile teams, this study did not find teamwork quality to be higher than in a similar survey on traditional teams. The effect of teamwork quality on team performance was only marginally greater for the agile teams than for the traditional teams.