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PENGARUH LATAR BELAKANG PENDIDIKAN DAN PENGALAMAN KERJA TERHADAP PRODUKTIVITAS KERJA KARYAWAN DI PT. INDOTIRTA SUAKA PULAU BULAN, BATAM Simanjuntak, Samuel; Zamora, Ramon
BENING Vol 3, No 2 (2016): NOVEMBER 2016
Publisher : University of Riau Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (626.88 KB) | DOI: 10.33373/bening.v3i2.742

Abstract

This study aims to examine and analyze the effect of Educational Background and Work Experience of the Employees Productivity at PT. Indotirta Suaka Moon Island, Batam. Data collect through questionnaires and conducted on 81 respondents.  Analysis of the data in this study using SPSS version 20 statistical sample technique and is based on research estimates using Slovin formula with an error rate of 10% and testing techniques of data used in this study include testing the validity of the factor analysis, reliability test with Cronbach alpha. Classical assumption test and multiple linear regression analysis, to test and prove the research hypothesis.  Hypothesis testing using t-test showed that varaiables and satisfaction Educational Background influence Employees Productivity and Work Experience variables affect the Employees Productivity. Then through the F test can be seen that two independent variables simultaneously affect the employees productivity. Figure adjusted R2 of 0.415 indicates that 41.5% variable employees productivity can be explained by the two independent variables in the regression equation, while the remaining 58.5% is explained by other variables outside the two variables used in the study.  
EVALUASI KEKUATAN TANAH DASAR BERDASARKAN UJI CALIFORNIA BEARING RATIO PADA SUATU RENCANA KAWASAN WISATA Simanjuntak, Samuel; Nugraha, Andrias Suhendra
JMTS: Jurnal Mitra Teknik Sipil Volume 9, Nomor 1, Februari 2026
Publisher : Prodi Sarjana Teknik Sipil, FT, Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmts.v9i1.36765

Abstract

Subgrade strength is a crucial factor in pavement design for areas subjected to static and dynamic traffic loads. This research aims to evaluate the subgrade's bearing capacity at a planned tourism area in Lembang, West Java. The evaluation was conducted using the field CBR test method in accordance with ASTM D 4429 and SNI 1738:2011. Data collection was carried out at 12 scattered areas, covering a total of 89 representative test points. The results show that the actual CBR values varied significantly with average values at each test area ranging from 4.35% to 6.45%. Although all values met the minimum design requirement (>2%), most of the subgrade conditions were classified as "Very Poor" to "Poor-Fair" and remained below the 6% threshold. This condition indicates low subgrade bearing capacity, high deformation potential, and non-uniform subgrade properties, so it is recommended to carry out soil improvement before the pavement construction stage is carried out in the planned tourism area. Abstrak Kekuatan tanah dasar (subgrade) merupakan faktor krusial dalam perencanaan perkerasan yang akan menanggung beban lalu lintas statis dan dinamis. Penelitian ini bertujuan untuk mengevaluasi daya dukung tanah dasar di suatu rencana kawasan wisata di Lembang, Jawa Barat. Evaluasi dilakukan menggunakan metode uji California Bearing Ratio (CBR) lapangan sesuai standar ASTM D 4429 dan SNI 1738:2011. Pengambilan data dilakukan pada 12 area yang tersebar dan mencakup total 89 titik uji representatif. Hasil penelitian menunjukkan bahwa nilai CBR lapangan tanah dasar rata-rata pada setiap area pengujian berkisar antara 4,35% hingga 6,45%. Meskipun seluruh nilai tersebut telah memenuhi syarat minimum perencanaan (>2%), mayoritas kondisi tanah dasar tergolong dalam kategori “Very Poor” hingga “Poor-Fair” dan berada di bawah ambang batas 6%. Kondisi ini mengindikasikan daya dukung tanah dasar yang rendah, potensi deformasi yang tinggi, dan sifat subgrade yang tidak seragam, sehingga direkomendasikan untuk melakukan perbaikan tanah (soil improvement) sebelum tahap konstruksi perkerasan dilakukan pada rencana kawasan wisata tersebut.