Nematicidal activity of plant extracts against the root-knot nematode, Meloidogyne incognita

Nematicidal activity of extracts from plants was assayed against Meloidogyne incognita. In laboratory assays extracts from tobacco (Nicotiana tabacum L), clove (Syzygium aromaticum L), betelvine (Piper betle L), and sweet flag (Acorus calamus L) were most effective in killing the nematode, with an EC50 that was 5-10 times lower than the EC50 of the synthetic pesticides chlorpyrifos, carbosulfan and deltamethrin. The shapes of the dead nematodes differed in a characteristic way, and groups of pesticides and plant extracts could clearly be distinguished based on this phenomenon, which may be an indicator for the modes of action of the tested pesticides. In a greenhouse bioassay clove bud and betelvine were tested as mulch. Experiments revealed that the total number of live nematodes on roots of pepper plants treated with mulch of the clove bud was 7% of that of the controls and did not differ significantly from that of plants treated with the recommended synthetic pesticide carbofuran. The application of clove buds as a botanical pesticide for future use against nematodes is highly promising since clove is the 6th major plant grown on Bangka Island, and the market value of clove has decreased sharply over the last year

KOHESI GRAMATIKAL DAN LEKSIKAL DALAM KUMPULAN JOKES "THE GOD LOVES GOLFERS" KARYA RAY FOLEY

Penelitian ini menganalisis kumpulan jokes berbahasa Inggris. Pendekatan yang dilakukan dalam penelitian ini menggunakan analisis wacana. Tujuan penelitian ini adalah untuk: (1) mendeskripsikan penanda kohesi gramatikal dalam teks jokes karya Ray Foley, (2) mendeskripsikan penanda kohesi leksikal dalam teks jokes karya Ray Foley, (3) menjelaskan peran kohesi gramatikal dan leksikal dalam penyampaian isi jokes kepada pembaca.Metode penelitian yang digunakan adalah kualitatif deskriptif. Sumber data penelitian ini adalah dokumen. Sumber data yang didapat dari dokumen berupa teks bacaan yang terdapat di dalam kumpulan jokes berbahasa Inggris. Data penelitian ini berupa teks bacaan dari kumpulan jokes berbahasa Inggris karya Ray Foley.Dari hasil analisis data, disimpulkan bahwa teks bacaan bergenre jokes karya Ray Foley merupakan sebuah wacana yang padu karena didukung oleh penanda kohesi. Dalam wacana ini ditemukan empat penanda kohesi gramatikal, yaitu referensi 38 Substitusi 2 ellipsis 1 dan konjungsi 4 Selanjutnya, dalam teks berbahasa Inggris karya Ray Foley juga ditemukan penanda kohesi leksikal, yaitu repetisi 211 Sinonimi 3 Antonimi 4 dan kolokasi 8. Kohesi gramatikal yang paling dominan dalam teks jokes berbahasa Inggris karya Ray Foley adalah referensi, sedangkan kohesi leksikal yang paling dominan adalah repetisi. Penanda kohesi tersebut memiliki peran dalam memunculkan alur cerita pada isi teks jokes karya Ray Foley.Kata kunci : Kumpulan Jokes berbahasa Inggris, Kohesi Gramatikal, Kohesi Leksikal, Peran Kohesi

ANALISIS MINAT ANAK Uol SEKOLAH DI PEDESAAN Ur MENUNTASKAN PROGRAM PENDIDIKAN WAJIB BELAJAI SEMBILAN TAHUN ( Studi Kasus : Desa Growong Lor, Kecamatan Juana, Kabnpaten Pati)

ABSTRACT This study aims to descrbe the social economic characteristics of school age children in the rural areas to finish nine year compulsory education programme, also to analyse dependent variable that is interest of school age children in rural areas to finish nine year compulsory education programme which is influenced by independent variable. They are parent's income, the parent's burden, school fee, education offamily head school distance, and parent's marriage status The Analysis model used in this reseacrh is Binary Logistic Regression, because the form of dependent variabll is dummy that consist of 1 and o. Growong Lor Village, Juana district in Pats regency is one of rural areas which describes the unsuccessfulness of nine year compulsory education programme. The traditional characetristic of Growong Lor village becomes environtmental factor whichsupport this village as the object ofthe study. As the result ofthis study, there are two independent variables that have significant influence to the dependent variable. Those variables are parent's income which is significant at a= S% andthe education offamily head which is significant at a= 10'916 . The otherfour variables are not significant at a= S% or a= 10A Key words: Binary Logistic Regression, interest ofschool age children in rural areas to finish nine year compulsory education programme, parent's income, the gent's burden school fee, education offamily head, school distance, parent's marriage statu

Interest of Vocational School Students in the Selection of Building Engineering Study Program Palangka Raya University in Class XII of Smk N 1 Palangka Raya

This study is descriptive research with a quantitative approach, the research subjects as many as 131 students from 7 different skill program classes in class XII SMK N 1 Palangka Raya. The questionnaire uses a likert scale and is created in the form of a Google form, then distributed online to students. After that, the data is analyzed using the achievement degree formula (DP) and multiple linear regression analysis. The results showed that the average percentage of interest of students of SMK N 1 Palangka Raya towards the selection of Program Building Engineering Education Study of Palangka Raya University amounted to 72.67% and belonged to the category of quite in demand. While the factors that affect the interest of students of SMK N 1 Palangka Raya continue their studies in the Building Engineering Education Study Program of The University of Palangka Raya, namely self-motivation factors, opportunity factors, social environmental factors and institutional factors are simultaneously indicated with a significance value of less than 0.05 and Fcalculated greater than Ftable (41,898 > 2.44). The most partially significant factor is the institutional factor with tcalculated value greater than the ttable value (7.605 > 1.97897). This research can be developed again, considering that only 55.7% of the free variables discussed in this study are able to explain bound variables,in addition this study can be used as an evaluation material on improving the promotion of PTB UPR Study Progra

Desain Ulang Meeting Room P3AI ITS Untuk Perbaikan Kualitas Akustik Video Conference

Ruang percakapan membutuhkan kejelasan suara yang cukup baik agar informasi bisa tersampaikan bisa diterima secara jelas. Parameter akustik ruang yang digunakan sebagai acuan adalah Reverberation Time, % Alcons, STI dan Critical Distance. Dalam penelitian ini ruangan yang digunakan untuk dianalisa dan dilakukan percobaan akustik ruangnya adalah ruangan yang terdapat di Perpustakaan ITS lantai 6 milik P3AI. Tujuan penelitian tugas akhir ini adalah untuk mendesain ulang ruangan di P3AI agar sesuai kebutuhan video conference. Desain yang dimaksud adalah bagaimana memberikan insulasi, menentukan material penyerap,dan mendesain sistem audio. Metode pengambilan data yang dilakukan adalah Impulse Response. Selain itu, simulasi hasil perhitungan dilakukan menggunakan software EASE4.3. Hasil perhitungan desain insulasi dalam ruangan sudah mampu mereduksi TTB maksimal yang keluar dari loudspeaker sebesar 35,92 dB dan 39,72 dB. Hasil desain ulang alternatif yang memakai material rock wool, glass wool, dan karpet pada permukaan dalam ruangan menunjukkan nilai RT 0,3 sekon, yang sebelumnya lebih tinggi yaitu sebesar 1,03 sekon. Hasil simulasi % Alcons dan STI untuk alternatif desain ulang juga sudah memenuhi standar yang sebesar 1,74% dan 0,841 yang berarti tingkat kejelasan suara dalam ruangan tersebut semakin baik

A case study in Bangka Island, Indonesia on the utilization of pesticides in black pepper plantations

Habits and consequences of pesticide use in pepper plantations were studied in Indonesia. The first study was conducted by questioning 117 farmers about their habits in pesticide use and determining pesticide residues on pepper berries on Bangka Island. Meanwhile, the second study was completed by analyzing exposure levels of pesticide in farmers' bodies before and after pesticide application to pepper plantations at Sukamulya, West Java. Risks of pesticide exposure to below ground terrestrial invertebrates and aquatic ecosystems adjacent to the treated fields were evaluated using scenarios and a decision support system. Results showed that five respondents (4.3%) were agricultural workers without their own plantations and the others were plantation owners. About 112 respondents (95.7%) used pesticides regularly, while 21 respondents (17.9%) had experienced pesticide poisoning. About 54 respondents (46.2%) tended to apply the same pesticide on all occasions, and 104 respondents (88.9%) indicated to always apply a single compound. About 91 respondents (77.8%) were not aware of the possible impact of pesticides on their health, and 102 respondents (87.2%) were not aware of the possible effects on the environment. In addition while spraying pesticides 17 respondents (14.5%) were smoking, 81 respondents (69.2%) were wearing daily clothes, and 84 respondents (71.8%) were throwing empty bottles into the forest. Exposure study revealed that the residues in the urine and blood increased 6.5-10 and 1.1-1.5 folds, respectively indicating actual and direct exposures. The environmental risk assessment indicated low risks for the terrestrial below ground invertebrates but high potential risks for the aquatic ecosystem. The residues of the major pesticides were below the maximum residue limits. This study indicated that the farmers and their workers, and probably also the environment, were at risk of high exposure to the pesticides applied, but that the risks for the consumers were negligible, if present at all

Penentuan Posisi SUmber Bising Pada Area Turbine Geared Compressor Set Di PT. Gresik Power Indonesia (the Linde Group) Dengan Beamforming

Pada dunia industri kebisingan merupakan hal yang wajib untuk dikendalikan. Identifikasi sumber bising adalah satu metode penting untuk mengoptimalkan emisi bising yang berasal dari area tersebut. Obyek penelitian ini adalah pada area steam turbine geared compressor set di LINDE GROUP. Dalam menentukan posisi sumber bising di suatu area, umumnya mengggunakan metode noise mapping dengan Sound Level Meter. Seiring dengan pesatnya perkembangan di bidang teknologi dan matematika, dari sinilah dikembangkan teknik alternatif untuk menentukan sumber bising pada suatu area dengan beamforming menggunakan sensor mikrofon array. Ada dua jenis metode beamforming yang digunakan yaitu Delay and Sum beamforming dan Minimum Variance Distortionless Response (MVDR) beamforming. Perekaman sinyal suara di Laboratorium dilakukan dengan menggunakan 1 mikrofon pada jarak 15 cm untuk mendapatkan sinyal baseline dan kombinasi 4 mikrofon pada jarak 90 cm terhadap sumber bunyi dengan kombinasi sudut 0°, +45° dan -45°. Sedangkan pada perekaman sinyal suara di Linde Group dilakukan dengan menggunakan 1 mikrofon pada jarak 15 cm untuk mendapatkan sinyal baseline dan kombinasi 4 mikrofon pada jarak 30 cm. Untuk mengetahui unjuk kerja dari kedua metode maka dilakukan perhitungan mean square error (MSE). Hasil penelitian yang didapatkan adalah nilai MSE MVDR beamforming di Linde Group terkecil bernilai 0.0899 yang terdapat pada titik 1 yang terletak pada belokan pipa masukan menuju kompresor stage 2. Sedangkan dengan analisa frekuensi sesaat menggunakan perhitungan Fast Fourier Transform (FFT) didapatkan adalah pola sinyal akustik dari area steam turbine geared compressor set dengan frekuensi yang selalu muncul dengan nilai amplitudo tertinggi yaitu pada 1358 Hz dengan nilai 0.0491. Sedangkan untuk validasi dengan Sound Level Meter (SLM) amplitudo tertinggi juga muncul pada frekuensi sekitar 1000Hz sampai dengan 1500 Hz dengan nilai power nya sebesar 122 dB