POTENSI ALELOPATI BEBERAPA GULMA SEBAGAI BIOHERBISIDA PADA TANAMAN KEDELAI (GLYCINE MAX L)

Penelitian ini bertujuan untuk mengetahui pengaruh alelopati gulma Imperata cylindrica, Cyperus rotundus dan Cynodon dactylon yang berpotensi sebagai bioherbisida untuk mengendalikan gulma pada tanaman kedelai. Penelitian ini dilaksanakan di Laboratorium Ilmu Gulma dan Kebun Percobaan Fakultas Pertanian Universitas Syiah Kuala Banda Aceh. Waktu penelitian ini mulai Mei sampai Agustus 2014. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) non Faktorial 7 perlakuan dengan 3 kali ulangan (tanpa ekstrak, konsentrasi ekstrak Imperata cylindrica 10%, konsentrasi ekstrak Imperata cylindrica 20%, konsentrasi ekstrak Cyperus rotundus 10%, konsentrasi ekstrak Cyperus rotundus 20%, konsentrasi ekstrak Cynodon dactylon 10%, konsentrasi ekstrak Cynodon dactylon 20%). Parameter yang diamati antara lain persentase keracunan tanaman kedelai, persentase pengendalian gulma, tinggi tanaman kedelai, bobot basah dan bobot kering gulma, jumlah biji per tanaman dan bobot biji per tanaman. ekstrak gulma berpengaruh nyata terhadap persentase keracunan tanaman kedelai pada 14 dan 21 HSA, pengendalian gulma Amaranthus spinosus dan Chloris barbata pada 7, 14 dan 21 HST. Pemberian beberapa konsentrasi ekstrak gulma tidak berpengaruh nyata terhadap tinggi tanaman kedelai, bobot biji per tanaman, jumlah biji per tanaman, bobot basah gulma, bobot kering gulma.Kata kunci : Alelopati, Bioherbisida, Tanaman Kedela

Hubungan persepsi kualitas pengajaran dosen dengan kepuasan mahasiswa Psikologi UIN Angkatan 2012 Universitas Islam Negeri Maulana Malik Ibrahim Malang

INDONESIA: Penelitian ini merupakan penelitian dengan analisis data yang menggunakan pendekatan kuantitatif, yaitu suatu penelitian yang didasari oleh falsafah positifisme, ilmu yang valid, ilmu yang dibangun dari empiris, teramati, terukur, menggunakan logika matematika dan membuat generalisasi atas rerata. Peneliti menjadikan metode pengumpulan data melalui angket sebagai metode utama, metode observasi atau pengamatan sebagai metode tambahan. Pengamatan dilakukan kepada seluruh Mahasiswa Psikologi UIN Maulana Malik Ibrahim Malang. peneliti mengamati proses belajar mengajar yang dilakukan mahasiswa dengan dosen dan nantiny peneliti akan mengetahui kualitas pelayanan pembelajaran dosen tersebut. Metode interview dan wawancara ini digunakan sebagai metode tambahan. Wawancara dilakukan kepada mahasiswa untuk mengetahui titik kepuasan saat pelaksanaan proses belajar mengajar. Hasil penelitian yang dilakukan peneliti terhadap tingkat kepuasan mahasiswa dimana dibagi menjadi 3 (tiga) tingkatan, yaitu tinggi, sedang, dan rendah.Untuk kategori tinggi 7 %, kategori sedang 47 %, dan kategori rendah 46 %.Jadi dapat disimpulkan bahwa tingkat kepuasan Mahasiswa UIN Maulana Malik Ibrahim adalah rendah. Hasil penelitian yang telah dilakukan oleh peneliti mengenai tingkat kualitas pengajaran dosen Psikologi UIN Maulana Malik Ibrahim Malang, menghasilkan tiga tingkat, untuk tingkat kualitas tinggi (1) 12 %, kemudian untuk tingkat kualitas sedang (2) 49 %, dan untuk kualitas rendah (3) 39 %. Jadi dapat disimpulkan bahwa tingkat kualitas pengajaran dosen Psikologi UIN Maulana Malik Ibrahim Malang rendah. Berdasarkan analisis yang dilakukan oleh peneliti mengenai hubungan antara kualitas pengajaran dosen dengan kepuasan mahasiswa, peneliti menggunakan media SPSS 15,0 for windows yang dilakukan untuk mengetahui hubungan antara dua variabel, yaitu Kualitas Pengajaran dengan Kepuasan Mahasiswa menunjukkan hubungan yang signifikan positif, dengan r = 0,640 . Penjelasannya berada pada Sig = 0.000. Dimana koefisien korelasi (correlation coefficients) yang merupakan petunjuk kuantitatif dari jenis dan tingkat hubungan antar variabel dengan interval-1,000 sampai +1,000.Angka -1,000 menunjukkan korelasi negatif yang mutlak dan angka +1,000 mununjukkan korelasi positif yang mutlak. nilai antara keduanya menunjukkan keragaman tingkat korelasi yang terjadi. Jika tidak terdapat hubungan sistematik antar variabel angka korelasinya adalah 0,000.Sehingga kedua variabel pada penelitian ini dinyatakan mempunyai korelasi yang signifikan positif. Kedua hal tersebut, Kepuasan Mahasiswa dan Kualitas Pengajaran Dosen, keduanya berbanding lurus. ENGLISH: This research is the analysis of the data using a quantitative approach, which is a study based on the philosophy of positivism, a valid science, a science that is built from the empirical, observable, measurable, using mathematical logic and make generalizations on average. Researchers made the method of collection of data through questionnaires as the primary method, the method of observation as an additional method. Observations were made to all Psychology students UIN Maulana Malik Ibrahim Malang.peneliti observe teaching and learning processes undertaken by the faculty and student researchers will be aware learning service quality lecturers. Interviews and interview method was used as an additional method. Interviews were conducted with students to determine the point of satisfaction at the implementation of the teaching and learning process. The results of the study conducted by researchers of the level of student satisfaction which is divided into 3 (three) levels: high, medium, and high categories of low 7%, the category was 47%, and 46% lower category. So it can be concluded that the level of student satisfaction UIN Maulana Malik Ibrahim was low. The results of the research that has been done by researchers on the quality level of teaching Psychology lecturer of UIN Maulana Malik Ibrahim Malang, generate three levels, for a high quality level (1) 12%, and then to rate the quality of being (2) 49%, and for low quality (3 ) 39%. So it can be concluded that the level of quality of teaching Psychology lecturer of UIN Maulana Malik Ibrahim Malang low. Based on the analysis conducted by researchers on the relationship between the quality of teaching faculty to student satisfaction, researchers used SPSS 15.0 for windows media were conducted to determine the relationship between two variables, namely the Quality of Teaching Student Satisfaction showed a significant positive correlation, with r = 0.640. The explanation is at Sig = 0.000. Where the coefficients of correlation (correlation coefficients) which is a quantitative indication of the type and degree of relationship between variables with interval -1.000 to +1.000. Figures showed negative correlation -1.000 absolute and figures +1.000 mutlak.nilai mununjukkan positive correlation between the two suggests that the level of diversity correlation exists. If there is no systematic relationship between variable rate correlation is 0.000. So these two variables in this study has revealed a significant positive correlation. Both cases, the Student Satisfaction and Quality of Teaching Faculty, both proportional

Potensisumber Daya Hayati Sebagai Penunjang Pembangunan Daerah Yang Berkelanjutan

Konsep perabangunan berkelanjutan (sustainable development) di Indonesia selatna ini belum diimplementasikan sebagaimana mestinya.Pembangunan yang dijalankan selama ini masih menitikberatkan pada aspek ekonomi dan meninggalkan aspek konservasi jauh di belakang. Akibatnya adalah menurunnya kualitas lingkungan hidup yang terjadi di mana-mana, termasuk degradasi lahan, penurunan fiingsi dan produktivitas lahan serta meningkatnya berbagai bentuk bencana alam. Untuk itu kebutuhan manusia dan kegiatannya haras diselaraskan dengan pemeliharaan keanekaragaman hayati. Pendekatan keterpaduan ini dijabarkan dalam pengelolaan bioregional yang mewadahi dan menitikberatkan konservasi keanekaragaman hayati dan peran serta masyarakat dalam memanfaatkan sumberdaya alam

An Electric-Circuit Model on the Inter-Tape Contact Resistance and Current Sharing for REBCO Cable and Magnet Applications

REBCO coated conductor has demonstrated high current capacity that can enable high-field magnets for high energy physics and fusion applications. However, quench protection is still one of the main challenges to be addressed for these applications. In addition, Ic and n value variations along the length of REBCO tapes exist in commercial production. The inter-tape contact resistance plays a key role to develop the self protection capability in cables and magnets by enabling current sharing and suppressing excessive eddy currents. Here we propose an electric-circuit model to describe the inter-tape contact resistance and its impact on the current sharing between REBCO tapes. We report the experiments on a 2-stacked tape REBCO cable with local Ic drop to validate the model. With the developed model, we study the upper limit of the contact resistance which allows current sharing between tapes. We also study the impact of variation in Ic and n values in tapes on the cable performance. Our model is expected to provide useful insight into the current sharing and target values for inter-tape contact resistance in REBCO cables and magnets for various applications

Implementasi Kebijakan Pengendalian Alih Fungsi Lahan Pertanian Pangan Berkelanjutan di Kecamatan Rimba Melintang Kabupaten Rokan Hilir

Conversion of agricultural land into Non Agricultural become a serious problem, which in essence is of particular concern, it is happening in District transverse Rimba Rokan Hilir, the tendency of the transfer function in this agricultural land into oil palm plantations is, along with the rate of rice farmland alihfungsi happened which has increased from year to year, from the year 2011-2012 were 1120.2 hectares of rice farmland converted to oil palm plantations in the District Jungle Crossing. With the issuance of Law No. 41 of 2009 on the Protection of Agricultural Land Sustainable Food, the aim of this study examines the implementation and the factors that influence achievement and efforts of sustainable food agriculture protection and control over the function of sustainable agricultural land. So that no agricultural land in the District Jungle rice Across functioned over to oil palm plantations.The method used in this study is descriptive, descriptive research method is done by analyzing the data and data collection fakta.Teknik using interview techniques, observation and documentation. The results show the implementation of Law No. 41 Year 2009 in Rokan Hilir districts particularly in the Jungle Crossing is still at the stage of identification lokasi.Hasil location identification has been carried out by the Department of Agriculture in 2012 showed that the sustainable protection of agricultural land need to be implemented to control over land use, food security and environmental sustainability. In the implementation, there should be a clear and unequivocal rule set on protected farmland, sanctions in the event of conversion of the protected land, and incentives which will be accepted by society if protecting agricultural land.Keywords: Policy, Land Transfer Functions, Protectio

Kontribusi Kompetensi Profesional, Supervisi Pendidikan Dan Iklim Kerja Terhadap Kinerja Guru SMP Negeri 2 Amlapura

Penelitian ini bertujuan untuk mengetahui: (1) kontribusi kompetensi profesional terhadap kinerja guru SMPN 2 Amlapura; (2) kontribusi supervisi pendidikan terhadap kinerja guru SMPN 2 Amlapura; (3) kontribusi iklim kerja terhadap kinerja guru SMPN 2 Amlapura; dan (4) kontribusi kompetensi profesional, supervisi pendidikan dan iklim kerja secara bersama-sama terhadap kinerja guru SMPN 2 Amlapura. Penelitian ini termasuk penelitian ex-post facto. Populasi penelitian adalah semua guru SMPN 2 Amlapura. Pengambilan sampel dilakukan dengan teknik studi sensus. Besarnya sampel penelitian adalah 50 orang. Data kompetensi profesional, supervisi pendidikan dan iklim kerja dikumpulkan dengan menggunakan kuesioner model skala Likert. Data kinerja guru dikumpulkan dengan menggunakan lembar penilaian kinerja guru dan dianalisis menggunakan analisis regresi. Hasil penelitian menunjukkan bahwa: (1) terdapat kontribusi yang signifikan kompetensi profesional terhadap kinerja guru SMPN 2 Amlapura; (2) terdapat kontribusi yang signifikan supervisi pendidikan terhadap kinerja guru SMPN 2 Amlapura; (3) terdapat konstribusi yang signifikan iklim kerja terhadap kinerja guru SMPN 2 Amlapura; dan (4) terdapat kontribusi yang signifikan kompetensi profesional, supervisi pendidikan dan iklim kerja sekolah secara bersama-sama terhadap kinerja guru SMPN 2 Amlapura.Kata Kunci : kompetensi profesional, supervisi pendidikan, iklim kerja, kinerja guru. This research aimed at finding out: (1) the contribution of professional competence towards teachers' performance in SMPN 2 Amlapura; (2) the contribution of educational supervision towards teachers' performance in SMPN 2 Amlapura; (3) the contribution of working climate towards teachers' performance in SMPN 2 Amlapura; and (4) the simultaneous contribution of professional competence, educational supervision and working climate towards teachers' performance in SMPN 2 Amlapura. This is an ex post facto research. The population was the teachers in SMPN 2 Amlapura. The sample was chosen through census studies technique. The sample consisted of 50 teachers. The data of professional competence, educational supervision, and working climate were collected through questionnaires while the data of teachers' performance were obtained through teachers working observation. All data were analyzed by using regression analysis. The findings are: (1) there was significant contribution of professional competence towards teachers' performance in SMPN 2 Amlapura; (2) there was significant contribution of educational supervision towards teachers' performance in SMPN 2 Amlapura; (3) there was significant contribution of working climate towards teachers' performance in SMPN 2 Amlapura; and (4) there was simultaneous contribution of professional competence, educational supervision and working climate towards teachers' performance in SMPN 2 Amlapura

DISTRIBUTION AND THREATS OF PHENGARIS TELEIUS (LEPIDOPTERA: LYCAENIDAE) IN NORTHERN SERBIA

The paper provides an overview on the distribution of recently discovered Scarce Large Blue (Phengaris (Maculinea) teleius) in northern Serbia (Selevenj Sands, Ludaš Lake and Subotica Sands). Mapping of the butterfly and its habitat has shown that most of the suitable habitats are limited to protected areas where at least some of the wet meadows with Sanguisorba officinalis host plant are suitably managed and regularly mown. Given the known maximum dispersal distances of P. teleius, the suitable habitat patches possibly support two separate meta-populations. Fragmentation and isolation of remaining colonies represent the main threats to long term survival of the species in Serbia. Based on IUCN criteria for regional red lists, the species qualifies as Endangered (EN) in Serbia and requires immediate conservation actions. Our results suggest that mowing is of high importance for maintaining suitable habitat. Until more is known about local ecological requirements of the species, general mowing recommendations should be followed with avoidance of mowing between mid June and mid September and providing a mosaic of different mowing regimes

ISO spectroscopy of gas and dust: from molecular clouds to protoplanetary disks

Observations of interstellar gas-phase and solid-state species in the 2.4-200 micron range obtained with the spectrometers on board the Infrared Space Observatory are reviewed. Lines and bands due to ices, polycyclic aromatic hydrocarbons, silicates and gas-phase atoms and molecules (in particular H2, CO, H2O, OH and CO2) are summarized and their diagnostic capabilities illustrated. The results are discussed in the context of the physical and chemical evolution of star-forming regions, including photon-dominated regions, shocks, protostellar envelopes and disks around young stars.Comment: 56 pages, 17 figures. To appear in Ann. Rev. Astron. Astrophys. 2004. Higher resolution version posted at http://www.strw.leidenuniv.nl/~ewine/araa04.pd

Removal of mineral oil and wastewater pollutants using hard coal

This study investigates the use of hard coal as an adsorbent for removal of mineral oil from wastewater. In order to determine the efficiency of hard coal as an adsorbent of mineral oil, process parameters such as sorption capacity (in static and dynamic conditions), temperature, pH, contact time, flow rate, and chemical pretreatment were evaluated in a series of batch and continuous flow experiments. There were significant differences in the mineral oil removal for various pH values examined. The adsorption of mineral oil increased as pH values diverged from 7 (neutral). At lower temperatures, the adsorption was notably higher. The wastewater flow rate was adjusted to achieve optimal water purification. Equilibrium was reached after 10 h in static conditions. At that time, more than 99% of mineral oil had been removed. At the beginning of the filtering process, the adsorption rate increased rapidly, only to show a minor decrease afterwards. Equilibrium data were fitted to Freundlich models to determine the water-hard coal partitioning coefficient. Physical adsorption caused by properties of the compounds was the predominant mechanism in the removal process

Enhanced susceptibility of Candida albicans to chlorhexidine under anoxia

Aim: Periodontal pockets can be colonized not only by bacteria, but also by Candida albicans. However, its role in periodontitis is unknown. This study evaluated the inhibitory performance of chlorhexidine digluconate under normoxic and anoxic conditions against 16 strains of C. albicans from periodontal pockets and other 20 from the oral mucosa. Methods: Strains were grown in normoxia and anoxia to adapt themselves to the different atmospheric conditions. Microdilution-based assays were carried out to determine the minimum concentrations of chlorhexidine that may restrain the conditioned candidal strains, in normoxia (normoxic MIC) and anoxia (anoxic MIC). The Mann-Whitney U test was used to evaluate the antimicrobial effect of chlorhexidine on C. albicans under normoxic and anoxic conditions (α = 0.05). Results: The normoxic MIC of chlorhexidine varied broadly from 150 to 1200 μg/mL, whereas its anoxic MIC varied narrower from 2.34 to 37.5 μg/mL. Regarding the origins of strains, no statistically significant differences (p > 0.05) were found. Conclusions: These results indicate that anoxic environmental conditions, compatible with periodontal pockets, tend to enhance C. albicans susceptibility to chlorhexidine.published_or_final_versio