549 research outputs found
Services For Homeless Youth: A Needs Assessment and Program Design
Homelessness among youth is a problem that is growing in the Minneapolis/St. Paul metropolitan area. The purpose of this study was to examine the services currently available for this population and to assess whether or not they are sufficient enough to serve the population of young homeless adults. Research for the study was done by looking at existing records such as studies done by the Minnesota Department of Education, and the Minnesota Department of Education. A local study done by the Wilder Research Center on homeless youth and a program evaluation done by the Bridge Inc., was also used to obtain information for the study. The findings of the study indicated that there is a need for further services in the Minneapolis/St. Paul metropolitan area. A program design was then developed. The program design includes the mission, goals and objectives, programming, evaluation, management style and budget. This program when developed will help to more effectively serve the population of homeless youth in this area
Melting of aluminium clusters
The melting of Al clusters in the size range 49 <= N <= 62 has been studied
using two model interatomic potentials. The results for the two models are
significantly different. The glue potential exhibits a smooth relatively
featureless heat capacity curve for all sizes except for N = 54 and N = 55,
sizes at which icosahedral structures are favoured over the polytetrahedral.
Gupta heat capacity curves, instead, show a well-defined peak that is
indicative of a first-order-like transition. The differences between the two
models reflect the different ground-state structures, and neither potential is
able to reproduce or explain the size dependence of the melting transition
recently observed in experiments
Pengaruh Media dan Periode Simpan terhadap Viabilitas Benih Cengkeh Tuni (Syzygium Aromaticum L.)
Penelitian ini bertujuan untuk menguji pengaruh media dan periode simpan terhadap viabilitas benih cengkeh. Penelitian dilaksanakan di laboratorium Balai Besar Perbenihan dan Proteksi Tanaman Perkebunan Ambon. Penelitian menggunakan rancangan acak lengkap pola faktorial dengan dua macam faktor dan tiga kali ulangan. Media simpan terdiri dari 3 taraf yaitu: Tanpa media simpan, media simpan sekam padi dan media simpan serbuk gergaji. Faktor kedua adalah periode simpan terdiri dari 4 taraf yaitu: penyimpanan 10 hari, penyimpanan 20 hari, penyimpanan 30 hari dan penyimpanan 40 hari. Parameter yang diukur adalah daya berkecambah, laju perkecambahan dan indeks vigor. Media simpan dan periode penyimpanan berpengaruh nyata pada persentase perkecambahan dan indeks vigor tetapi tidak berpengaruh nyata pada laju perkecambahan. Hasil penelitian menunjukan bahwa media simpan serbuk gergaji merupakan media yang baik bagi penyimpanan benih cengkeh (Syzygium aromaticum L.). Hal ini terlihat pada hasil rata-rata daya berkecambah benih cengkeh yang disimpan pada media simpan serbuk dengan lama penyimpanan selama 10 hari memberikan hasil yang lebih baik yakni 85% jika dibandingkan dengan sekam padi pada lama penyimpanan 10 hari dengan persentase perkecambahan 65%.
Kata Kunci: benih cengkeh, media simpan, periode simpa
The Feynman effective classical potential in the Schr\"odinger formulation
New physical insight into the correspondence between path integral concepts
and the Schr\"odinger formulation is gained by the analysis of the effective
classical potential, that is defined within the Feynman path integral
formulation of statistical mechanics. This potential is related to the
quasi-static response of the equilibrium system to an external force. These
findings allow for a comprehensive formulation of dynamical approximations
based on this potential.Comment: 10 pages, 4 figure
Phase diagram of model anisotropic particles with octahedral symmetry
We computed the phase diagram for a system of model anisotropic particles
with six attractive patches in an octahedral arrangement. We chose to study
this model for a relatively narrow value of the patch width where the
lowest-energy configuration of the system is a simple cubic crystal. At this
value of the patch width, there is no stable vapour-liquid phase separation,
and there are three other crystalline phases in addition to the simple cubic
crystal that is most stable at low pressure. Firstly, at moderate pressures, it
is more favourable to form a body-centred cubic crystal, which can be viewed as
two interpenetrating, and almost non-interacting, simple cubic
lattices.Secondly, at high pressures and low temperatures, an orientationally
ordered face-centred cubic structure becomes favourable. Finally, at high
temperatures a face-centred cubic plastic crystal is the most stable solid
phase.Comment: 12 pages,10 figure
STUDI EKSPERIMENTAL PERFORMANCE KAVITASI WATERJET PROPULSI
Cavitation is a complex phenomenon of dynamic processes in hydraulic machines that can cause a decrease in energy performance, vibration and damage the blade surfaces. Analysis of cavitation symptoms in hydraulic machines is carried out through cavitation performance studies, namely the relations between energy parameters. Each hydraulic machine has a critical value on a different cavitation performance curve. Therefore, a study of the effect of cavitation changes is needed to determine the working zone of hydraulic machines without cavitation. In this study, cavitation performance analysis was carried out on a waterjet propulsor model with 5 impeller blades and 7 stator blades using experimental methods. The cavitation coefficient was varied at σ = 2.25 to 0.25 by setting and controlling the inlet pressure on the cavitation test rig. The critical point value will be observed at the point where the thrust coefficient decreased to 3.28%. The results showed that cavitation begins at σ = 1, the critical point is obtained at σ = 0.75. From these studies, we find that waterjet must be operated at conditions where is σ > 0.75
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