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All Journal Jurnal Pendidikan Almuslim International Journal Software Engineering and Computer Science (IJSECS) Brilliant International Journal of Management and Tourism
Zulyani Zulyani
Unknown Affiliation
Computer Science & IT Economics, Econometrics & Finance Education

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UPAYA MENINGKATKAN KEMAMPUAN BERPIKIR KRITIS SISWA KELAS VIII SMP NEGERI 3 GANDAPURA MELALUI PENERAPAN MODEL PEMBELAJARAN PROBLEM POSSING PADA KONSEP TEKANAN M. Taufiq; Zulyani Zulyani
Jurnal Pendidikan Almuslim Vol. 2 No. 2 (2014): Jurnal Pendidikan Almuslim
Publisher : FKIP

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Abstract

Penelitian ini bertujuan untuk mengetahui peningkatan kemampuan berpikir kritis siswa kelas VIII SMP Negeri 3 Gandapura pada konsep tekanan melalui penerapan model pembelajaran Problem Possing. Jenis penelitian ini adalah penelitian tindakan kelas (Classroom Action Research) dengan subjek penelitian siswa kelas VIII SMP Negeri 3 Gandapura yang berjumlah 17 orang. Instrument yang digunakan dalam penelitian ini adalah LKS, RPP, tes, lembar observasi dan angket respon siswa. Penelitian ini terdiri dari 3 siklus, setiap siklus terdiri dari 2 kali pertemuan. Setiap pertemuan diamati oleh dua orang pengamat yang mengamati aktivitas guru dan siswa. Disetiap akhir siklus dilaksanakan tes untuk mengetahui peningkatan kemampuan berpikir kritis siswa. Tes kemampuan berpikir kritis siswa dianalisis dengan menggunakan statistik deskriptif. Hasil analisis data menunjukkan bahwa terjadi peningkatan kemampuan berpikir kritis siswa disetiap siklusnya, siklus I memperoleh persentase 14,3%, siklus II memperoleh persentase 35,7% dan mengalami peningkatan pada siklus III menjadi 92,9% tergolong dalam kategori sangat baik. Selain itu aktivitas guru siklus I persentase yang diperoleh 70,5%, siklus II memperoleh persentase 81,1%  dan mengalami peningkatan pada siklus III menjadi 90,3% tergolong dalam kategori sangat baik, sedangkan aktivitas siswa pada siklus I memperoleh persentase sebesar 68,1%, siklus II 78,3% dan mengalami peningkatan pada siklus III menjadi 85,6% tergolong dalam kategori baik.   Kata kunci : Penelitian tindakan kelas, kemampuan berpikir kritis, pembelajaran Problem Possing.
How PT. SINJ Distributes Products Across Indonesia : A Study of Hybrid Distribution Strategies Zulyani Zulyani; Suharto Suharto; Umar Burhan
Brilliant International Journal Of Management And Tourism Vol. 5 No. 2 (2025): : Brilliant International Journal Of Management And Tourism
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/bijmt.v5i2.4457

Abstract

Distribution inefficiencies remain a persistent challenge for firms operating in geographically dispersed and infrastructure-limited markets such as Indonesia. Companies must navigate logistical complexity while maintaining service reliability and cost-efficiency. This study focuses on PT. SINJ, a major distributor of automotive spare parts headquartered in Gresik Regency, which addresses these challenges through a hybrid distribution strategy. Employing a qualitative descriptive method, data were gathered through interviews, direct observations, and document analysis involving internal managers and regional agents. The findings reveal that PT. SINJ utilizes multiple distribution levels—ranging from direct-to-consumer to agent-based and multi-tier intermediary systems—based on regional infrastructure and accessibility. While this approach enables broad market coverage, it also produces operational constraints, including frequent stockouts, delayed deliveries, and weak coordination between central and field operations. The study recommends actionable improvements, such as implementing real-time inventory tracking across agents, establishing micro-warehouses in underserved regions, integrating automated restocking protocols, and formalizing logistics partnerships with multiple freight carriers. These measures are essential to enhancing PT. SINJ’s distribution resilience, reducing lead time variability, and sustaining competitive advantage in Indonesia’s fragmented logistics landscape.
A Probability-Based Reliability Model for Evaluating Ro-Ro Ferry Sailing-Speed Compliance on an Indonesian Short-Sea Route Using AIS Data Hardiyanto Hardiyanto; Andri Nofiar. Am; Teguh Widodo; Supria Supria; Depandi Enda; Zulyani Zulyani
International Journal Software Engineering and Computer Science (IJSECS) Vol. 6 No. 3 (2026): DECEMBER 2026
Publisher : Lembaga Komunitas Informasi Teknologi Aceh (KITA), Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35870/ijsecs.v6i2.7589

Abstract

Automatic Identification System (AIS) data provide continuous operational records that can be transformed into computational indicators for evaluating maritime service performance. This study aims to develop an AIS-based probabilistic model for assessing Ro-Ro ferry service-speed reliability through sailing-speed compliance. Speed over Ground (SOG) observations were used to determine whether vessels operated within a predefined reliable speed range during sailing. The reliable speed range was defined as 7–9 knots based on the performance indicator required by the local transportation authority responsible for route licensing, while sailing observations were identified using a 3–15 knot SOG filter. From 32,358 raw AIS messages collected between 1 January and 31 March 2026, 11,166 sailing observations were retained. Observation-based reliability was 35.63%, while duration-based reliability was 36.63%, indicating that 324.76 of 886.64 estimated sailing hours were spent within the reliable speed range. Vessel-level analysis showed substantial variation, with two vessels recording duration-based reliability above 50% and two others below 10%. The Weibull distribution provided the best parametric fit, with an Akaike Information Criterion (AIC) of 44,051.48, the lowest among the fitted candidate distributions. The cumulative distribution function indicated a 35.88% probability of operating within the 7–9 knot range. Monte Carlo bootstrap resampling with 10,000 iterations produced 95% confidence intervals of 34.75–36.53% and 35.38–37.88% for observation-based and duration-based reliability, respectively. These findings indicate that AIS data can support a reproducible screening approach for evaluating aggregate and vessel-level ferry service-speed reliability.
Co-Authors Andri Nofiar. Am Depandi Enda Hardiyanto Hardiyanto M. Taufiq Suharto Suharto Supria Supria Teguh Widodo Umar Burhan