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MORPHOLOGICAL AND MECHANICAL PROPERTIES OF MT. KELUD VOLCANIC ASH REINFORCED POLYESTER AND EPOXY COMPOSITES Henny Pratiwi
Jurnal Teknik Mesin Vol 6, No 2 (2017): JTM Edisi Spesial 2017
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v6i2.1189

Abstract

The use of suitable waste products as raw materials has become an interesting matter in composite industry nowadays due to the environmental issues. Volcanic ash is one of the waste materials containing a high number of silica. The aim of this study is to examine the morphological and mechanical properties of Mt. Kelud volcanic ash reinforced polyester and epoxy composites. The volcano ash was dried and sieved into 50 mesh then mixed with polyester or epoxy manually for 10 minutes. The ash added into the matrix was varied by 0%, 10%, 20%, 30% and 40% from matrix volume content. For epoxy matrix, the composite with 40 vol. % particles has the highest tensile strength. However, for the polyester/ash composites, the tensile strength continues to decrease with the addition of particles. There is a significant increasing of 47.04 % for polyester and 5.62 % for epoxy in impact strength when 40 vol. % of volcanic ash added into both polymers. The Scanning Electron Microscopy result shows that there is void and agglomeration contained in epoxy/ash composites and crack propagation along the surface of polyester/ash composites that could be the cause of the failure.
Hubungan Persepsi Pengembangan Karier Dengan Kinerja Karyawan PT. Jaya Tama Inovasi Agro Indonesia Henny Pratiwi; Sinaga, Kalvin; Riyadh, Muhammad Ilham
Jurnal Sains dan Teknologi Vol. 5 No. 1 (2023): Jurnal Sains dan Teknologi
Publisher : CV. Utility Project Solution

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

Abstract

This study aims to determine the relationship between perceptions of career development and the performance of . Jaya Tama Inovasi Agro Indonesia employees. The population of this study were employees in 3 fields, namely the education administration section, the marketing administration section and the work placement administration, totaling 55 people. The research sample uses a saturated sample system where the total population is used as a sample in the study. This study uses one scale, namely the career development perception scale. While the employee performance scale of the documentation method was taken in the HRD section of the . Jaya Tama Inovasi Agro Indonesia. On the career development perception scale consists of 4 aspects, namely responsibility, position status, authority, and compensation and employee performance scale is work quantity, work quality, work attendance and work timeliness. Data collection uses one psychological scale, namely the Career Development Perception Scale ( 40 items were declared valid with a value of r count > r table (0.3) and all items were declared reliable with a Cronbach alpha value of 0.916). The results of this study showed a correlation coefficient rxy 0.778 with p = 0.000 (p <0.01). These results indicate that the hypothesis put forward by researchers is that there is a positive relationship between perceptions of career development and the performance of . Jaya Tama Inovasi Agro Indonesia employees. The positive correlation coefficient value indicates that the direction of the relationship between the two variables is positive, meaning that the more positive the perception of career development, the better the performance of the . Jaya Tama Inovasi Agro Indonesia employees. Perceptions of career development make an effective contribution of 60.6% to the performance of . Jaya Tama Inovasi Agro Indonesia and 39.4% are influenced by other factors not examined in this study.
Career Development Strategies for Vocational Students in the Digital Era Novita Eka Muliawati; Tri Wahyuni; Henny Pratiwi; Lilik Nur Aini; Tuwoso Tuwoso
International Journal of Educational Evaluation and Policy Analysis Vol. 2 No. 2 (2025): April : International Journal of Educational Evaluation and Policy Analysis
Publisher : Asosiasi Riset Ilmu Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/ijeepa.v2i2.249

Abstract

The digital era has brought significant changes in various aspects of life, including in the fields of education and career development. Vocational High School students are faced with challenges to prepare themselves for an increasingly competitive and technology-based world of work. This study aims to identify effective career development strategies for vocational students in the digital era. Through literature analysis and case studies, this research found that the utilization of information technology, soft skills development, and collaboration with industry are key to improving students' work readiness. The results of this study are expected to provide insights for educators, students, and stakeholders in formulating career development programs that are relevant and adaptive to the needs of the labor market.
THE INFLUENCE OF HUMAN RESOURCE DEVELOPMENT ON IMPROVING EMPLOYEE PERFORMANCE AT PT PERKEBUNAN IV REGIONAL I Henny Pratiwi; Nova Elianti
Multidisciplinary Indonesian Center Journal (MICJO) Vol. 2 No. 4 (2025): Vol. 2 No. 4 Edisi Oktober 2025
Publisher : PT. Jurnal Center Indonesia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62567/micjo.v2i4.1263

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh pengembangan sumber daya manusia (SDM) terhadap kinerja karyawan di PT Perkebunan Nusantara IV Regional I. Pengembangan SDM mencakup motivasi, kepribadian, dan keterampilan, sedangkan kinerja karyawan diukur melalui kualitas, kuantitas, waktu, biaya, pengawasan, dan hubungan antar karyawan. Metode penelitian menggunakan pendekatan kuantitatif dengan sampel jenuh, yakni 30 karyawan tetap bagian SDM & Sistem Manajemen. Data diperoleh melalui observasi dan kuesioner, lalu dianalisis dengan regresi linear sederhana menggunakan SPSS. Hasil penelitian menunjukkan pengembangan SDM berpengaruh signifikan terhadap kinerja karyawan, ditunjukkan oleh nilai t hitung 5,872 > t tabel 1,699 dengan signifikansi 0,000 < 0,05. Artinya, semakin baik program pengembangan SDM maka semakin meningkat pula kinerja karyawan. Penelitian ini menyarankan agar perusahaan terus meningkatkan pelatihan, memberikan apresiasi, dan mengembangkan keterampilan karyawan guna mendorong produktivitas secara berkelanjutan.
ANALYSIS OF FARMING BUSINESS AND STRATEGY FOR INCREASING CORN PRODUCTION (ZEA MAYS) Susan Novrini; Murni Sari Rahayu; Surya Dharma; Mhd. Ilham Riyadh; Henny Pratiwi
International Journal of Economic, Business, Accounting, Agriculture Management and Sharia Administration (IJEBAS) Vol. 2 No. 6 (2022): December
Publisher : CV. Radja Publika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/ijebas.v2i6.743

Abstract

The research objectives were: (1) to find out how much corn farming income was in the research area, (2) to find out the efficiency level of farming income in the research area, (3) to find out strategies for increasing production in the research area. The sampling method uses saturated sampling method (census) with a sample of 30 farmers, the data used are primary and secondary data. Data were analyzed using I = TR-TC to calculate income, to calculate the level of efficiency a = R/C, and SWOT analysis. The results showed that the average income of corn farmers per hectare in Sena Village was Rp. 6,455,000. R/C value of 1.51 means corn farming is efficient and feasible to cultivate. From the results of the IE matrix, it can be found that the internal X point is 0.9 and the Y point is 0.
Konservasi Tanah pada Tanaman Pisang di Lahan Berlereng untuk Pertanian Berkelanjutan: Kajian di Kecamatan Tarabintang, Kabupaten Humbang Hasundutan: Soil Conservation in Banana Cultivation on Sloping Land for Sustainable Agriculture: A Study in Tarabintang District, Humbang Hasundutan Regenc Salman Alfarisi; Henny Pratiwi; Yelfi Yana Linda Br. Jabat; Miyarnis
Biofarm : Jurnal Ilmiah Pertanian Vol. 22 No. 2 (2026): BIOFARM JURNAL ILMIAH PERTANIAN
Publisher : Universitas Pekalongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31941/biofarm.v22i2.8335

Abstract

Kecamatan Tarabintang, Kabupaten Humbang Hasundutan, Sumatera Utara, terletak di lereng barat Pegunungan Bukit Barisan dengan topografi curam dan termasuk zona paling rawan longsor di kabupaten tersebut, sehingga erosi menjadi ancaman utama bagi keberlanjutan budi daya pisang di lahan kering berlereng. Penelitian ini bertujuan mengkaji faktor-faktor penyebab erosi pada tanaman pisang di Tarabintang dan merumuskan arahan konservasi tanah yang sesuai dengan kondisi lahannya. Penelitian menggunakan metode deskriptif-analitis berbasis data sekunder berupa dokumen tata ruang, rencana pembangunan kawasan, kajian komoditas unggulan, kajian kerawanan lahan, serta sintesis literatur dan meta-analisis konservasi tanah, yang dianalisis dengan kerangka faktor erosi USLE dan klasifikasi kemampuan lahan menurut kelas lereng. Hasil kajian menunjukkan bahwa faktor panjang dan kemiringan lereng (LS) tinggi, sehingga erosi aktual terutama ditentukan oleh pengelolaan tanaman (C) dan tindakan konservasi (P). Tanaman pisang rentan erosi pada fase awal tanam, saat penyiangan bersih, dan akibat tetesan tajuk, tetapi menghasilkan biomassa sisa panen yang besar untuk mulsa. Arahan konservasi yang dirumuskan adalah penanaman menurut kontur dan mulsa pada lereng 0–8%, guludan dengan strip rumput pada lereng 8–15%, teras gulud dan tanaman pagar legum pada lereng 15–25%, agroforestri pisang–kakao dengan teras individu pada lereng 25–40%, serta vegetasi permanen berbasis pohon pada lereng di atas 40%. Kata kunci: agroforestri; erosi; konservasi tanah; lahan berlereng; pisang
PELATIHAN MANAJEMEN SUMBER DAYA MANUSIA UNTUK MENINGKATKAN PRODUKTIVITAS KELOMPOK USAHA MASYARAKAT Nursaid; Rudolf Simatupang; Zaenudin; Henny Pratiwi; Fauziah F. Farawowan
Journal of Community Service Vol 8 No 2 (2026): JCS, December 2026
Publisher : Ikatan Dosen Menulis

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56670/jcs.v8i2.528

Abstract

Pengabdian kepada Masyarakat ini bertujuan meningkatkan pemahaman dan keterampilan kelompok usaha masyarakat dalam mengelola sumber daya manusia untuk mendukung produktivitas usaha. Kegiatan dilaksanakan di Kabupaten Sidoarjo, Provinsi Jawa Timur dan diikuti oleh 30 peserta. Pelaksanaan kegiatan dilakukan melalui beberapa tahapan, seperti penyampaian materi, diskusi interaktif, praktik penyusunan rencana kerja, pendampingan, dan evaluasi menggunakan pre-test dan post-test. Hasil kegiatan menunjukkan bahwa adaya peningkatan pemahaman peserta mengenai pentingnya perencanaan tenaga kerja, pembagian tanggung jawab berdasarkan kemampuan, pengelolaan waktu, motivasi kerja, serta evaluasi kinerja untuk mendukung kelancaran kegiatan usaha. Peningkatan tersebut dapat dilihat dari hasil evaluasi yang menunjukkan bahwa nilai rata-rata peserta meningkat dari 48% pada pre-test menjadi 83,7% pada post-test, dengan kenaikan sebesar 35,7%. Peningkatan tertinggi terdapat pada indikator pembagian tugas dan tanggung jawab serta penerapan manajemen sumber daya manusia untuk produktivitas, masing-masing sebesar 39%. Peserta juga mulai menerapkan pembagian tugas tertulis dan pencatatan hasil kerja secara lebih teratur. Secara keseluruhan kegiatan ini menunjukkan bahwa pelatihan berkontribusi terhadap peningkatan pemahaman, keterampilan, dan kesiapan peserta dalam menerapkan manajemen sumber daya manusia.