From fusion to total disassembly: global stopping in heavy-ion collisions

Using the quantum molecular dynamics model, we aim to investigate the emis- sion of light complex particles, and degree of stopping reached in heavy-ion colli- sions. We took incident energies between 50 and 1000 MeV/nucleon. In addition, central and peripheral collisions and different masses are also considered. We ob- serve that the light complex particles act in almost similar manner as anisotropic ratio. In other words, multiplicity of light complex particles is an indicator of global stopping in heavy-ion collisions. We see that maximum light complex particles and stopping is obtained for heavier masses in central collisions

Unravelling technology-acceptance factors influencing farmer use of banana tissue culture planting materials in Central Uganda

Effective management of plant health is fundamental for food and income security to meet the growing demands of local and global markets. This however requires farmers’ adequate access to quality planting materials under the prevailing contextual and psycho-social factors. This study, anchored in the Unified Theory of Acceptance and Use of Technologies, unravels technology-acceptance factors that influence farmers’ intentions to use banana tissue culture planting materials in the control of Banana Xanthomonas Wilt. Data were collected from 248 randomly sampled banana farmers using a structured questionnaire and analyzed using structural equation modelling to examine hypothesized paths in the uptake of banana tissue culture planting materials. Results show that farmer intentions to use tissue culture planting materials are dependent on two constructs: social influence and farmer innovativeness. However, social influence is the main predictor of intentions to use tissue culture planting materials. In particular, farmer innovativeness mediates facilitating conditions and social influence in predicting intentions to use tissue culture planting materials. Thus, this study reveals two factors that influence farmer intentions to use tissue culture planting materials: social influence and farmer innovativeness. The findings imply that social influence and farmer innovativeness are critical in disseminating novel agricultural technologies in Uganda and elsewhere

Pengaruh Dosis Kompos Fermentasi Dan Penggunaan Pupuk Hayati Mikoriza Terhadap Pertumbuhan Dan Hasil Tanaman Buncis (Phaseolus Vulgaris. L)

Research has been conducted in Bojongsari Village, Kembaran Subdistrict Banyumas Regency Central Java on ± 3 month. The aim of research: To know dose of fermentation compost was best influenced on growth and yield of French bean. To know treatment of natural fertilizer mycorrhiza on influenced on growth and yield of French bean. To know the interaction's effect between fermentation compost dose and USAge of biological fertilizer micorrhyze on growth and yield of French bean. This research represents polibag experiment with factorial pattern. Used design was Randomized Block Design (RBD) with four times replications. Each treatment plot number was 24. Each experimental plot comprised of three plants then total number of plant was 72. Tested factors were fermentation compost dose (15.000 kg/ha or 75 gram/polibag, 20.000 kg/ha or 100 gr/polibag, 25.000 kg/ha or 125 gram/polibag) and USAge biological fertilizer mycorrhiza (without mycorrhiza and use mychorriza). Research result showed that treatment of fermentation compost providing significant effect on number of pods. While on other variable studied such as plant length, the amount of leaf, the weight of the wet upper plant, the weight of fresh root and pods weight was not significantly influenced. Treatment of fermentation compost with dose of 125 gram/polibag represent best fermentation compost dose at this research. Treatment of biological fertilizer mycorrhiza was not significantly influenced on entire observed variables that where plant length, leaf number, the weight of the wet upper plant, the weight of fresh root and pods weight. There was interaction between treatment of compost fertilizer combination and natural fertilizer mychorrhiza on growth and yield of French bean at observed variable that were lower bunch weight that significantly different and not significantly different in plant length, leaf number, the weight of the wet upper plant, the weight of fresh root and pods weight. Key words: Fermentation compost, mycorrhiza, french bea

Two-Color Polarization Spectroscopy Measurement of Nitric Oxide

Nitric Oxide (NO) is a greenhouse gas that contributes to smog and acid rain. Commercial combustion engines and turbines are significant sources of NO emission. Two-color Polarization Spectroscopy (PS) will be used to measure the collision-induced resonances of NO in gas mixtures. The effect of collision partners, such as He and Ar, on the line-shape of NO molecule will be studied. This experiment requires the use of two dye laser systems to generate 226nm beam from frequency mixing of 355nm and 622nm. This enhanced the scan range and improved the ease of operation. One dye laser will be used to generate circularly polarized pump beam, which will be tuned to excite the transitions across the X-A (0,0) band of NO. Another dye laser will be used to generate linearly polarized 226nm probe beam, which will be used to probe the transitions. A photomultiplier tube will be used to collect the polarization signal. Nitrogen will be mixed with the NO gas mixtures to measure the sensitivity of this technique. In the current stage of the project, the pump beam is aligned and its wavelength is controlled by a LabVIEW programmed motor. Laser induced fluorescence data was collected to calibrate the scanning frequency with NO’s excitation frequency. The excitation spectrum of NO from this specific pump-probe transition pair will help us understand the fundamental collision dynamics of NO and create a more quantitative technique of NO concentration measurement

Conflict-Free Coloring of Planar Graphs

A conflict-free k-coloring of a graph assigns one of k different colors to some of the vertices such that, for every vertex v, there is a color that is assigned to exactly one vertex among v and v's neighbors. Such colorings have applications in wireless networking, robotics, and geometry, and are well-studied in graph theory. Here we study the natural problem of the conflict-free chromatic number chi_CF(G) (the smallest k for which conflict-free k-colorings exist). We provide results both for closed neighborhoods N[v], for which a vertex v is a member of its neighborhood, and for open neighborhoods N(v), for which vertex v is not a member of its neighborhood. For closed neighborhoods, we prove the conflict-free variant of the famous Hadwiger Conjecture: If an arbitrary graph G does not contain K_{k+1} as a minor, then chi_CF(G) <= k. For planar graphs, we obtain a tight worst-case bound: three colors are sometimes necessary and always sufficient. We also give a complete characterization of the computational complexity of conflict-free coloring. Deciding whether chi_CF(G)<= 1 is NP-complete for planar graphs G, but polynomial for outerplanar graphs. Furthermore, deciding whether chi_CF(G)<= 2 is NP-complete for planar graphs G, but always true for outerplanar graphs. For the bicriteria problem of minimizing the number of colored vertices subject to a given bound k on the number of colors, we give a full algorithmic characterization in terms of complexity and approximation for outerplanar and planar graphs. For open neighborhoods, we show that every planar bipartite graph has a conflict-free coloring with at most four colors; on the other hand, we prove that for k in {1,2,3}, it is NP-complete to decide whether a planar bipartite graph has a conflict-free k-coloring. Moreover, we establish that any general} planar graph has a conflict-free coloring with at most eight colors.Comment: 30 pages, 17 figures; full version (to appear in SIAM Journal on Discrete Mathematics) of extended abstract that appears in Proceeedings of the Twenty-Eighth Annual ACM-SIAM Symposium on Discrete Algorithms (SODA 2017), pp. 1951-196

PERBANDINGAN PENENTUAN KADAR PROKSIMAT DALAM BATUBARA MENGGUNAKAN METODE GRAVIMETRI KONVENSIONAL DAN THERMOGRAVIMETRIC ANALYSIS

Research on the comparison of the determination of proximate levels in coal using conventional gravimetric methods and Thermogravimetric Analysis (TGA) through comparative tests has been carried out. This study aims to determine the comparison of the average analysis results using the t-test, the precision level of analysis results of each method using CV Horwitz, and the comparison of the precision level of the analysis results using the F test. Based on the results of the t-test showed a significant difference in the average analysis results between the two methods for all parameters. In the test using CV Horwitz for parameters of inherent moisture, volatile matter and fixed carbon using both methods and also ash content using the conventional gravimetric method was declared to meet the precision requirements, but for the ash content parameter using TGA instruments was stated otherwise. The F test for parameters of ash content and inherent moisture showed a significant difference in the precision level of the analysis results between the two methods, but for the parameters of volatile matter and fixed carbon was stated otherwise

PERBANDINGAN PENENTUAN KADAR PROKSIMAT DALAM BATUBARA MENGGUNAKAN METODE GRAVIMETRI KONVENSIONAL DAN THERMOGRAVIMETRIC ANALYSIS

Research on the comparison of the determination of proximate levels in coal using conventional gravimetric methods and Thermogravimetric Analysis (TGA) through comparative tests has been carried out. This study aims to determine the comparison of the average analysis results using the t-test, the precision level of analysis results of each method using CV Horwitz, and the comparison of the precision level of the analysis results using the F test. Based on the results of the t-test showed a significant difference in the average analysis results between the two methods for all parameters. In the test using CV Horwitz for parameters of inherent moisture, volatile matter and fixed carbon using both methods and also ash content using the conventional gravimetric method was declared to meet the precision requirements, but for the ash content parameter using TGA instruments was stated otherwise. The F test for parameters of ash content and inherent moisture showed a significant difference in the precision level of the analysis results between the two methods, but for the parameters of volatile matter and fixed carbon was stated otherwise

Developments in Longwall Ventilation

Rapid development in longwall mining technology has brought significant changes in panel layout and geometry. These changes require adaptations in the ventilation system to provide sufficient air quantities in longwall face and bleeder areas. At CONSOL, various longwall bleeder systems in the Pittsburgh No. 8 Seam have been studied with detailed ventilation surveys. Computer model network simulations were conducted from these surveys to study the effects of different bleeder configurations and ventilation adjustments. This paper examines the relationships between the longwall face air quantity and the convergence in the tailgate-to-bleeder entries, number of development entries, bleeder fan pressure and the tailgate ventilation scheme. It shows that, using conventional ventilation patterns, the face air quantity may be limited if the gob caves tightly. In such cases, modification of the ventilation pattern to an internal bleeder system, combined with appropriate tailgate ventilation and higher bleeder fan pressure may be required. Experience in CONSOL\u27s operations has proven this method successful especially in mines that changed from four-entry to three-entry longwall development

EVALUASI PROSES INSINERASI LIMBAH BAHAN BERBAHAYA DAN BERACUN MENGGUNAKAN INSINERATOR PADA PT PLKK KUTAI KERTANEGARA

Seiring peningkatan aktivitas industri di berbagai sektor memiliki konsekuensi terhadap bertambahnya jumlah Limbah Bahan&nbsp; Berbahaya dan Beracun (LB3) sehingga perlu dikelola dengan baik dan benar, agar tidak berpotensi memicu terjadinya kecelakaan dan pencemaran lingkungan. Pengelolaan Limbah B3 telah diatur dalam peraturan pemerintah, meliputi kegiatan pemusnahan Limbah B3 menggunakan Insinerator. Evaluasi pengelolaan limbah B3 Perlu dilakukan untuk mengetahui apakah sudah sesuai dengan Peraturan Pemerintah No 22 Tahun 2021 di PT PLKK, khususnya proses pemusnahan Limbah B3 yang dilakukan secara incinerator, emisi udara, jumlah dan klasifikasi limbah B3 serta&nbsp;&nbsp; menilai&nbsp;&nbsp; pelaksanaan&nbsp;&nbsp; pengelolaan&nbsp;&nbsp; Limbah&nbsp;&nbsp; B3&nbsp;&nbsp; di&nbsp;&nbsp; PT.&nbsp;&nbsp; PLKK. Penelitian&nbsp; ini&nbsp; dilakukan&nbsp; di&nbsp; area&nbsp; operasi&nbsp; PT.&nbsp; PLKK&nbsp; yang&nbsp; terletak&nbsp; di Samboja, Kalimantan Timur dengan menggunakan metode wawancara pada responden kunci menggunakan purposive sampling.&nbsp; Hasil penelitian menunjukkan kegiatan PT. PLKK meliputi kegiatan pengangkutan, pengumpulan, pemanfaatan dan pemusnahan serta telah memiliki izin operasi yang dikeluarkan oleh pemerintah pusat, provinsi maupun daerah. Jenis limbah yang dikumpulkan dan dikelola sebanyak 18 jenis limbah B3 yang berasal dari berbagai macam kegiatan industri dan memiliki karakteristik mudah terbakar, korosif, infeksius dan beracun. Sedangkan untuk jumlah Limbah B3&nbsp; yaitu 20.777,3 Ton/Tahun. Proses pengelolaan limbah B3 dan pembakaran/insinerasi limbah B3, PT. PLKK telah sesuai dengan SOP dan peraturan yang berlaku, tetapi terdapat 3 realisasi di PT PLKK yang tidak sesuai dengan Peraturan Pemerintah Nomor 22 Tahun 2021 yaitu pada proses pengumpan/insinerasi limbah B3, ketidaksesuaian SOP dan pengawasan pekerja oleh PT. PLK