59 research outputs found
Rainforest conversion to smallholder plantations of rubber or oil palm leads to species loss and community shifts in canopy ants (Hymenoptera: Formicidae)
No full textCurrently, our understanding of the responses of ant communities under rainforest conversion to cash crops in SE Asia is based on comparisons of primary rainforests to large company-owned oil palm estates in Malaysian Borneo and a few comparisons of natural forests to rubber plantations in Thailand and China. In Indonesia, second largest rubber producer and largest oil palm producer worldwide, the vast majority of its rubber economy and almost half its oil palm acreage relies on smallholder farmers. This study compares canopy ant communities among four land-use systems in Jambi Province, Sumatra, Indonesia: 1) lowland rainforest, 2) jungle rubber (i.e., extensive rubber cultivation), and monoculture plantations of 3) rubber or 4) oil palm. Smallholder plantations of rubber and oil palm support less than 25% of the abundance and less than 50% of the canopy ant species richness in lowland rainforest, with intermediate levels in jungle rubber. Canopy ant communities from rainforest and jungle rubber were similar and differed from those in monoculture rubber and oil palm plantations, which each hosted distinct communities. Nestedness and turnover also differed between rainforest and jungle rubber on the one hand and rubber and oil palm on the other. This pattern was in part due to significantly greater proportions of tramp ants in the monoculture plantations: While virtually absent in forest (< 1%), six tramp ant species accounted for 9.8% of the collected ant individuals in jungle rubber, 26.6% in rubber and 41.1% in oil palm plantations (up to 88.1% in one studied plantation). Overall, this study improves our understanding of the effects of rainforest conversion to cash crop plantations of rubber and oil palm on ant communities by incorporating smallholder systems in one of the most important regions for oil palm and rubber production worldwide. Open access, licensed under CC BY 4.0. © 2020 The Author(s).Open-Access-Publikationsfonds 202
ANALISA TERGANGGUNYA PROSES KEGIATAN BONGKAR MUATAN PADA CARGO PUMP DI KAPAL MT. SC OCEAN LI
Get PDFABSTRAKSI
Feri Hidayat Toha, 2019, NIT : 51145409.T, “Analisa terganggunya proses
kegiatan bongkar muatan pada cargo pump di kapal MT. SC OCEAN LI”, skripsi
Program Studi Teknika, Program Diploma IV, Politeknik Ilmu Pelayaran Semarang,
Pembimbing I : SARIFUDDIN, M.Pd, M.Mar.E
Pembimbing II : TONY SANTIKO, S.ST.,M.Si
Terganggunya kinerja Cargo Pump pada proses bongkar muatan dapat
diindikasikan dengan rusaknya Mechanical Seal dan Main Bearing sehingga
mempengaruhi proses bongkar muatan. Menurunnya tekanan disebabkan karena
adanya kerusakan pada komponen pompa. Dalam hal ini penulis ingin menguraikan
analisa permasalahan mengenai menurunnya tekanan Cargo Pump.
Jenis penelitian yang digunakan adalah deskriptif kualitatif dengan Fishbone
analysis. Dimana metode adalah suatu cara untuk menyusun urutan prioritas isu yang
harus diselesaikan dengan menentukan tingkat urgensi, keseriusan, sampai ke
perkembangan masalahnya. Dengan menganalisa masalah menentukan factor
penyebab, upaya yang harus dilakukan dan menyimpulkan suatu permasalahan.
Teknik pengumpulan data dilakukan melalui observasi, dokumentasi dan studi
kepustakaan secara langsung terhadap subyek yang berhubungan dengan pengaruh
terganggunya kinerja Cargo Pump pada bongkar muatan di kapal.
Ada banyak penyebab kerusakan komponen pada Cargo Pump yang berakibat
menurunnya sistem putaran pada pompa di MT. SC OCEAN LI, dari penyebab
tersebut dianalisa untuk menemukan penyebab dasar. Di MT. SC OCEAN LI,
menurunnya kinerja Cargo Pump disebabkan oleh kotornya main bearing karena
kurangnya pemberian greace dan kebocoran mechanical seal karena kurangnya
perawatan ataupun pengecekan pada komponen pompa.
Dari abtraksi diatas penulis dapat menyimpulkan bahwa tidak optimalnya
Cargo Pump disebabkan oleh beberapa faktor antara lain kotornya main bearing
karena rusak kurangnya pelumasan dan kebocoran mechanical seal karena
kurangnya perawatan ataupun pengecekan pada komponen pompa.
ABSTRACTION
Feri Hidayat Toha, 2019, NIT: 51145409.T, "Analysis of the disruption of the
loading and unloading process at the cargo pump on the MT vessel. SC OCEAN LI
", Thesis of Engineering Study Program, Diploma IV,
Semarang Merchant Marine Polytechnic.
Advisor I: SARIFUDDIN, M.Pd, M.Mar.E
Advisor II: TONY SANTIKO, S.ST., M.Si
The disruption of Cargo Pump's performance in the loading and unloading
process can be indicated by damaged mechanical seals and Main Bearings which
affect the loading and unloading process. Decreased pressure due to damage to pump
components. In this case the author wants to describe the analysis of the lower
pressure Cargo Pump.
The type of research used is descriptive qualitative with Fishbone analysis.
Where method is a way to arrange a sequence of issues that must be resolved by
determining the level of urgency, seriousness, to developmental developments. By
analyzing the problem determines the causes, efforts that must be done and overcome
a problem. The technique of collecting data is done through observation,
documentation and direct library study of subjects related to centralized performance.
Cargo pump on loading and unloading on board.
There are many causes of damage to the components of the Cargo Pump
which results in a decrease in the rotation system at the pump at MT. SC OCEAN LI,
from that reason is analyzed to find the basic cause. At MT. SC OCEAN LI,
decreasing the performance of Cargo Pump caused by dirty main bearings due to
lack of grease and mechanical seal release due to maintenance which is not
responsible for pump components.
From the abstraction pump, it can load the Cargo pump optimally due to
several factors including the gross bearing due to poor lubrication and leakage of
mechanical seals due to good maintenance or checking on pump components
Pengaruh Kualitas Produk, Kualitas Pelayanan Dan Persepsi Harga Terhadap Kepuasaan Pelanggan Di Basic Instic Culinary Jakarta
Get PDFTujuan dari penelitian ini adalah untuk mengetahui pengaruh kualitas produk, kualitas pelayanan, dan persepsi harga terhadap kepuasan pelanggan di Basic Instic Culinary Jakarta. Populasi sasaran penelitian ini adalah pelanggan Basic Instic Culinary Jakarta. Para peneliti menggunakan metode sampling aksidental untuk memilih partisipan. Ukuran sampel untuk penelitian ini terdiri dari 100 responden. Pengumpulan data dilakukan dengan menggunakan kuesioner yang diuji validitas dan reliabilitasnya. Peneliti menggunakan beberapa analisis linier dalam SPSS 25 untuk Windows untuk menganalisis data. Pengujian hipotesis dilakukan dengan menggunakan uji-F untuk menilai efek simultan secara keseluruhan dan uji-t untuk mengevaluasi efek parsial individu. Hasil penelitian ini menunjukkan bahwa kualitas produk, kualitas pelayanan, dan persepsi harga berpengaruh signifikan terhadap kepuasan pelanggan, baik secara parsial maupun simultan. Temuan ini mendukung anggapan bahwa faktor-faktor tersebut memainkan peran penting dalam menentukan tingkat kepuasan pelanggan di Basic Instic Culinary Jakarta
Pengaruh Promo Gratis Ongkos Kirim, Return Dan Online Customer Review Terhadap Keputusan Pembelian Pada Marketplace Shopee (Studi Pada Kelurahan Sudirejo II)
Get PDFPenelitian ini bertujuan untuk mengetahui pengaruh Promo Gratis Ongkos Kirim, Return dan Online Customer Review terhadap Keputusan Pembelian pada Marketplace Shopee (Studi Pada Kelurahan Sudirejo II) baik secara parsial maupun simultan. Jenis penelitian menggunakan data primer, instrumen penelitian ini menggunakan kuisioner. Populasi yang digunakan dalam penelitian ini berjumlah 11.000 orang konsumen Shopee di Kelurahan Sudirejo II dan Sampel dalam penelitian ini sebanyak 100 responden. Metode penelitian ini menggunakan metode kuantitatif deskriptif. Teknik analisis data ini menggunakan analisis regresi linier berganda dengan persamaan regresi Y = 1.395 + 0.308X1 + 0.305X2 + 330X3. Hasil Uji Parsial (T) pada variabel Promo Gratis Ongkos Kirim diperoleh nilai sig. 0.003 < 0.05 dan t-hitung 3.020 > t-tabel 1.661, pada variabel Return diperoleh nilai sig. sebesar 0.003 < 0.05 dan t-hitung sebesar 3.070 > t-tabel 1.661 dan pada variabel Online Customer Review diperoleh nilai sig. sebesar 0.001 < 0.05 dan t-hitung sebesar 3.483 > t-tabel 1.661. Sedangkan hasil Uji Simultan (F) diperoleh nilai sig. sebesar 0.001 < 0.05 dan f-hitung sebesar 68.458 > f-tabel 2.70. Dan hasil yang diperoleh dalam penelitian menunjukkan nilai R2 sebesar 68.1%, sehingga dapat disimpulkan bahwa ada pengaruh Promo Gratis Ongkos Kirim, Return dan Online Customer Review berpengaruh simultan terhadap Keputusan Pembelian pada Marketplace Shopee di Kelurahan Sudirejo II
Optical properties of substituted phthalocyanine rare-earth metal complexes
Get PDFThis article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in K. Yoshino, S. B. Lee, T. Sonoda, H. Kawagishi, R. Hidayat, K. Nakayama, M. Ozaki, K. Ban, K. Nishizawa, K. Ohta, and H. Shirai, Journal of Applied Physics 88, 7137 (2000) and may be found at https://doi.org/10.1063/1.1316050.Comparative study of optical properties of alkylthio-group-substituted phthalocyanine rare-earth metal sandwich complexes ([(CnS)8Pc]2M,M=Eu,Lu,Tb) is presented. Photoluminescence and photoconductivity of [(CnS)8Pc]2M complex is very weak. Two photoluminescence bands were observed at around 400–650 and 720–800 nm in chloroform solution corresponding to the Soret and Q bands in the absorption spectra, respectively. However, the emission from Eu3+ ion (as well as Tb3+) was not found compared with other Eu complexes because the 5d levels of the Eu3+ ion lie higher than the triplet level of the ligand. The significant enhancement of the photoconductivity of [(C16S)8Pc]2M after C60 doping is reported. The photoconductivity is positive at the low electric field in the ohmic regime while it becomes negative at the high electric field upon photoexcitation with strongly absorbed light. The negative photoconductivity is attributed to space-charge effects. The mechanism of photoluminescence and photoconductivity are discussed by taking the electronic energy schemes of phthalocyanine ligands and lanthanide ion and C60 into consideration
Analisis Komparatif Ditinjau dari Pendapatan dan Efisiensi Usaha Ternak Itik Pedaging dan Petelur Di Kecamatan Sumpiuh
Get PDFPenelitian ini dilaksanakan pada bulan Agustus-September 2015. Tujuan penelitian ini yaitu mengetahui tingkat pendapatan dan efisiensi itik pedaging dan petelur, serta mengkaji faktor jumlah ternak, pakan ternak, pendidikan, curahan kerja, lama beternak dan pola pemeliharaan terhadap pendapatan dan efisiensi usaha ternak pedaging dan petelur di Kecamatan Sumpiuh. Metode pengambilan sampel yaitu metode survey dengan metode penetapan sampel kecamatan menggunakan purposive sampling dengan lokasi Kecamatan Sumpiuh ditentukan karena salah satu penghasil itik di Banyumas, sedangkan metode penetapan peternak menggunakan metode stritifed random sampling. Sampel dibagi menjadi dua strata yaitu itik pedaging dan itik petelur masing-masing strata diambil 30% dan minimal 30 responden. Itik pedaging jumlah sampelnya kurang dari 30, maka dibulatkan menjadi 30 responden. Jumlah responden itik pedaging sebesar 30 responden, sedangkan petelur berjumlah 49 responden. Data dianalisis menggunakan student t test dan analaisis multiple regresi. Hasil penelitian menunjukan adanya perbedaan signifikan antara itik pedaging dan petelur pada variabel pendapatan dengan nilai signifikasi pendapatan sebesar 0,002 dan efisiensi sebesar 0,300. Terdapat perbedaan tersebut dikarenakan variabel pendapatan hasil ujinya kurang dari 0,05. Analisis regresi terhadap pendapatan mendapatkan hasil bahwa f signifikan sebsar 0,000000002 yang berarti bahwa jumlah ternak, pakan ternak, curahan kerja, pendidikan, lama berternak dan variabel dummy pola pemeliharan secara bersama-sama berpengaruh terhadap pendapatan dengan tingkat signifikasi 99% (p<0,01). Analisis regresi terhadap efisiensi mendapatkan hasil bahwa f signifikan sebesar 0,000 yang berarti bahwa jumlah ternak, pakan ternak, curahan kerja, pendidikan, lama berternak dan variabel dummy pola pemeliharan secara bersama-sama berpengaruh terhadap efisiens
Good coupling performance of PyBOP in the solid-phase synthesis of tetrapeptide, OH-Pro-Leu-Ala-Ileu-NH2
No full textPengaruh Harga, Keragaman Barang Dan Kualitas Pelayanan Terhadap Keputusan Pembelian (Studi Pada Konsumen Swalayan Aneka Jaya Ngaliyan Semarang)
Get PDFOne of many proof that tradig market in Indonesia growing is increasing of total supermarket. Retail Company required to fullfilling consume desire. Aneka Jay Supermarket in Ngaliyan is a supermarket in semarang which still growing comparing its competitor with same field.This study aims to determine the effect of price, product variation, and service quality towards purchasing decision in Swalayan Aneka Jaya Ngaliyan. Population in this study are consumen from Swalayan Aneka Jaya in Ngaliyan and taking sample consist 95 respondence. The data were analyzed through correlation coefficient, determination coefficient, simple linear regression, and t test.Based on the survey results revealed that price, product variation and service quality have significant effect on purchasing decision., either partially or simultaneously. Independent variables that have the biggest influence on purchasing decisions was the variable of product variation.In conclusion, obtained the three variables, that is price, product variation, and service quality have dominant effect with purchasing decision whereas product variation have the biggest effect from those three variables. Suggestion from author is increase promotion activity that have relation with price, gave discount of certain moment, increase the product variation, facility of supermarket, and increase service quality from worker to make cosumen felling impulse purchasing and repeat purchasing
Internal geometry effect of structured PLA materials manufactured by dropplet-based 3D printer on its mechanical properties
No full textMOBILE SCANNER ADOPTION ANALYSIS BETWEEN EMPLOYMENT AND EDUCATIONAL BACKGROUND – AN ANALYSIS OF LOGISTIC REGRESSION
Get PDFAs of today, the mobile apps may be downloaded everywhere. The development of mobile apps depends on the type of the work. An increasing use of mobile app is scanner apps due to an easy use. This paper presents the regression analysis on employment and educational background of the mobile scanner app because this research used category in the questionnaire. The use of logistic regression is to prove that any different comparisons are detected between employment and educational background so that the use of mobile scanner can be optimally used. The results show that educational background and employment have vital roles for mobile scanner adoption. This study also proves that previous researches on mobile scanner adoption were true for UTAUT model and comparison analysis
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