Pengaruh Pemberian Motivasi dan Komitmen Organisasi terhadap Kinerja Karyawan (Studi pada Hotel Dyan Graha Pekanbaru)

This study aims to analyze the provision of motivation and organizational commitment and its effect on employee performance at Hotel Dyan Graha Pekanbaru. Provision of motivation as a variable (X1), Organizational Commitment as Variable (X2), and employee performance as a variable (Y). The method in this research is descriptive and quantitative by using program of SPSS 21, where sample used is 56 employees conducted by census and technique of collecting data through questioner. The results of analysis using the validity test, test reliability, test determination, simple linear regression test, multiple linear regression test, t test and F test. So it can be concluded that the provision of motivation significantly influence employee performance at Hotel Dyan Graha Pekanbaru, Employee performance at Hotel Dyan Graha Pekanbaru, and giving motivation and organizational commitment have a significant effect on employee performance at Hotel Dyan Graha Pekanbaru

Penerapan Metode Drill and Practice Dilengkapi Modul Untuk Meningkatkan Keaktifan Dan Prestasi Belajar Pada Materi Pokok Hidrolisis Garam Kelas XI IPA 5 SMA Negeri 7 Surakarta Tahun Pelajaran 2012 / 2013

Penelitian ini bertujuan untuk meningkatkan keaktifan dan prestasi belajar siswa melalui metode drill and practice dilengkapi dengan modul pada materi pokok hidrolisis garam siswa kelas XI IPA 5 semester genap SMA N 7 surakarta, tahun pelajaran 2012/2013. Metode penelitian yang digunakan yaitu analisis deskripstif kualitatif dengan jenis penelitian tindakan kelas. Subjek penelitian yaitu siswa kelas XI IPA 5 dengan jumlah 25 siswa. Data penelitian berupa data kualitatif dan kuantitatif dengan teknik pengumpulan data menggunakan tes kognitif (aspek kognitif), observasi (keaktifan dan psikomotorik), dan angket (afektif dan keaktifan). Hasil penelitian menunjukkan bahwa penerapan metode drillandpractice dilengkapi modul. Hal ini dilihat dari hasil penelitian antara siklus I dengan siklus II. Dari segi keaktifannya, metode ini mampu meningkatkan keaktifan siswa, pada siklus I 52.80% meningkat menjadi 64.83% pada siklus II. Prestasi belajar siswa mencakup aspek kognitif naik dari 40 % saat pra siklus menjadi 54 % saat siklus I dan 80 % siklus II. Untuk aspek afektif juga mengalami kenaikan yaitu dari 74.65% pada siklus I menjadi 80,3% pada siklus II. Berdasarkan hasil penelitian dapat disimpulkan bahwa metode pembelajaran drill and practice dilengkapi modul dapat meningkatkan keaktifan dan prestasi belajar siswa pada materi pokok hidrolisis garam kelas XI IPA 5 SMA Negeri 7 Surakarta

Maximum entropy models for antibody diversity

Recognition of pathogens relies on families of proteins showing great diversity. Here we construct maximum entropy models of the sequence repertoire, building on recent experiments that provide a nearly exhaustive sampling of the IgM sequences in zebrafish. These models are based solely on pairwise correlations between residue positions, but correctly capture the higher order statistical properties of the repertoire. Exploiting the interpretation of these models as statistical physics problems, we make several predictions for the collective properties of the sequence ensemble: the distribution of sequences obeys Zipf's law, the repertoire decomposes into several clusters, and there is a massive restriction of diversity due to the correlations. These predictions are completely inconsistent with models in which amino acid substitutions are made independently at each site, and are in good agreement with the data. Our results suggest that antibody diversity is not limited by the sequences encoded in the genome, and may reflect rapid adaptation to antigenic challenges. This approach should be applicable to the study of the global properties of other protein families

Construction of a high-efficiency multi-site-directed mutagenesis

Although site-directed mutagenesis has been used in many fields, it still has low rate of success and high cost because of low-yield target products. A modified method for multi-site-directed mutagenesis was developed with shifted primer design and cold-start polymerase chain reaction (PCR). The developed method was successfully applied to hexapeptide gene synthesis and recombinant enterokinase gene modification in the plasmids pET41a and pET24b-EK. The efficiency was pronounced at a 1:10 molar ratio of 7-base mutant products to 705-bp fragment products as control. Even in a 10-base substitution mutagenic PCR, a 1:50 molar ratio of mutant  products to 705-bp fragment products was reached. Meanwhile, the quality of mutants was proved through the transformation efficiency and  sequencing. This method was beneficial to prepare high-quality multibase mutagenesis and also implied that large-scale multibase mutagenesis was feasible, efficient, economical, and productive.Key words: Site-directed multibase mutagenesis, shift primer, hexapeptide gene, enterokinase gene

On the form of growing strings

Patterns and forms adopted by Nature, such as the shape of living cells, the geometry of shells and the branched structure of plants, are often the result of simple dynamical paradigms. Here we show that a growing self-interacting string attached to a tracking origin, modeled to resemble nascent polypeptides in vivo, develops helical structures which are more pronounced at the growing end. We also show that the dynamic growth ensemble shares several features of an equilibrium ensemble in which the growing end of the polymer is under an effective stretching force. A statistical analysis of native states of proteins shows that the signature of this non-equilibrium phenomenon has been fixed by evolution at the C-terminus, the growing end of a nascent protein. These findings suggest that a generic non-equilibrium growth process might have provided an additional evolutionary advantage for nascent proteins by favoring the preferential selection of helical structures.Comment: 4 pages, 3 figures. Accepted for publication in Phys. Rev. Let

Analisa Karakteristik Biodiesel Nyamplung

Seno Darmanto, Windu Sediono, Sarwoko, Triyatno, in this paper explain that making of callophylum inophylum biodiesel fuel is done alkaly transesterification methode. Alkaly transesterification methode use methanol and basa (NaOH) of catalist. Procedur and setting of research that is consisted in material selection, treatment and setting of composition of methanol and catalist, operational temperature, reaction time, speed and mixer technical will effect quality and conversion level of callophylum inophylum biodiesel. And based data analyzer show that conversion of callophylum inophylum biodiesel can reach 90%. Properties of callophylum inophylum biodiesel show viscosity and flash point of callophylum inophylum biodiesel is ligthly higher than diesel fuel. And caloric value of callophylum inophylum biodiesel is slightly lower than diesel fuel

Bethe approximation for self-interacting lattice trees

In this paper we develop a Bethe approximation, based on the cluster variation method, which is apt to study lattice models of branched polymers. We show that the method is extremely accurate in cases where exact results are known as, for instance, in the enumeration of spanning trees. Moreover, the expressions we obtain for the asymptotic number of spanning trees and lattice trees on a graph coincide with analogous expressions derived through different approaches. We study the phase diagram of lattice trees with nearest-neighbour attraction and branching energies. We find a collapse transition at a tricritical theta point, which separates an expanded phase from a compact phase. We compare our results for the theta transition in two and three dimensions with available numerical estimates.Comment: 10 pages, 3 figures, to be published in Europhysics Letter