43 research outputs found
Fast algorithms for the quantile regression process
Get PDFThe widespread use of quantile regression methods depends crucially
on the existence of fast algorithms. Despite numerous algorithmic improvements,
the computation time is still non-negligible because researchers
often estimate many quantile regressions and use the bootstrap for inference.
We suggest two new fast algorithms for the estimation of a sequence of quantile
regressions at many quantile indexes. The first algorithm applies the preprocessing
idea of Portnoy and Koenker (1997) but exploits a previously estimated
quantile regression to guess the sign of the residuals. This step allows
for a reduction of the effective sample size. The second algorithm starts from
a previously estimated quantile regression at a similar quantile index and updates
it using a single Newton-Raphson iteration. The first algorithm is exact,
while the second is only asymptotically equivalent to the traditional quantile
regression estimator. We also apply the preprocessing idea to the bootstrap by
using the sample estimates to guess the sign of the residuals in the bootstrap
sample. Simulations show that our new algorithms provide very large improvements
in computation time without significant (if any) cost in the quality of
the estimates. For instance, we divide by 100 the time required to estimate 99
quantile regressions with 20 regressors and 50,000 observations.https://arxiv.org/abs/1901.03821First author draf
Optimasi Aktivitas Bakteriosin yang Dihasilkan oleh Bakteri Lactobacillus plantarum dari Minuman Ce Hun Tiau
No full textBacteriocin is a protein compound with a small molecular weight that has an antibacterial activity. Bacteriocin has been widely applied as a natural food preservative, as it effectively prevents the growth of pathogenic bacteria in foods and beverages. The aim of this research was to know the activity of bacteriocin produced by lactic acid bacteria Lactobacillus plantarum from Ce hun tiau beverages against Escherichia coli and Staphylococcus aureuswith different pH and temperature treatments. In this study, Lactobacillus plantarum bacteria isolated from Ce hun tiau beverages were characterized by Gram staining test. Bacteriocin was extracted from Lactobacillus plantarum bacteria which had been incubated in deMan Rogose Sharpe Broth media. Confirmation test using proteolytic enzyme and bacteriocin activity test with different pH (2, 4, 6, 8, and 10) and temperature (40°, 60°, 80°, 100°, and 121°C) treatments were conducted. The results showed that bacteriocin hadantibacterial activity against Escherichia coli but had no activity against Staphyloccus aureus. The inhibition zone was formed at pH 2 to 6 and at temperature range of 40°C to 121°C
TINJAUAN YURIDIS TENTANG PENERAPAN PASAL 307 KUHD TERHADAP SANTUNAN ASURANSI JIWA DI PT. ASURANSI JIWASRAYA CABANG BENGKULU
No full textPenelitian dilakukan bertujuan untuk mengetahui penerapan Pasal 307 KUHD terhadap santunan asuransi jiwa di PT. Asuransi Jiwasraya Cabang Bengkulu. Untuk mengetahui hak dan kewajiban pemegang polis apabila terjadi penyimpangan Pasal 307 KUHD pada PT. Asuransi Jiwasraya Cabang Bengkulu. Untuk mengetahui faktor penghambat apa yang dihadapi oleh PT. Asuransi Jiwasraya Cabang Bengkulu dalam penerapan Pasal 307 KUHD. Penelitian ini dilakukan di PT. Asuransi Jiwasraya Cabang Bengkulu. Penarikan sampel dilakukan dengan metode purposive sampling, data diperoleh melalui wawancara kepada responden yaitu Kepala Cabang PT. Asuransi Jiwasraya, dan 3 (tiga) orang tertanggung asuransi di PT. Asuransi Jiwasraya Cabang Bengkulu selain itu juga data diperoleh melalui penelitian kepustakaan. Hasil penelitian menunjukkan bahwa penerapan Pasal 307 KUHD untuk di wilayah Bengkulu belum pernah terjadi, namun apabila terjadi, maka pihak asuransi akan menerapkan Pasal 307 KUHD, mengenai santunan asuransi jiwa ialah apabila tertanggung melakukan bunuh diri atau dihukum mati oleh pengadilan maka santunannya tidak dibayar dan pemegang polis hilang hak dan kewajibannya terhadap polis, namun apabila di dalam polisnya terdapat atau ada nilai tunai, maka nilai tunainya yang dibayar. Nilai tunai di sini maksudnya adalah “sejumlah uang yang tercantum dalam polis yang merupakan kewajiban pemegang polis sesuai dengan yang diperjanjikan”. Faktor penghambat pelaksanaan Pasal 307 adalah masyarakat banyak yang belum mengenai manfaat asuransi di dalam kehidupan mereka
A Service of zbw Public Sector Pay Gap in France: New Evidence Using Panel Data Public Sector Pay Gap in France: New Evidence Using Panel Data ABSTRACT Public Sector Pay Gap in France: New Evidence Using Panel Data
No full textStandard-Nutzungsbedingungen: Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden. Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen. Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, gelten abweichend von diesen Nutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte. Terms of use: Documents in Public Sector Pay Gap in France: New Evidence Using Panel Data Olivier Bargain Blaise Melly The Institute for the Study of Labor (IZA) in Bonn is a local and virtual international research center and a place of communication between science, politics and business. IZA is an independent nonprofit organization supported by Deutsche Post World Net. The center is associated with the University of Bonn and offers a stimulating research environment through its international network, workshops and conferences, data service, project support, research visits and doctoral program. IZA engages in (i) original and internationally competitive research in all fields of labor economics, (ii) development of policy concepts, and (iii) dissemination of research results and concepts to the interested public. D I S C U S S I O N P A P E R S E R I E S IZA Discussion Papers often represent preliminary work and are circulated to encourage discussion. Citation of such a paper should account for its provisional character. A revised version may be available directly from the author. We estimate the public wage gap in France for the period 1990-2002, both at the mean and at different quantiles of the wage distribution, for men and women separately. We account for unobserved heterogeneity by using fixed effects estimations on panel data and, departing from usual practice, allow the public wage markup to vary over time. We also provide one of the very first applications of fixed effects quantile regressions. Contrary to common belief, results convey that monetary returns are not fundamentally different in the public sector. Firstly, public wage 'premia' (for women) or 'penalties' (for men) are essentially the result of selection. After controlling for unobserved heterogeneity, only small pay differences between sectors remain over time, reflecting fluctuations due to specific public policies and to the procyclicality of private sector wages. The long-term difference is essentially zero. Secondly, the relative compression of the wage distribution by the public sector is also partly due to unobserved characteristics. The most natural explanation for these results is that the civil sector manages to attract better workers in the lower part of the distribution, in part because of non-monetary gains (including job protection), but fails to retain the most productive ones at the top. JEL Classification: C13, C14, C21, J31, J4
Pengaruh ion Cu(II) dan Zn(II) terhadap efektivitas fotoreduksi ion Hg(II) yang dikatalisis TiO2
No full textPENGGUNAAN MEDIAGAMBAR UNTUK MENINGKATKAN KEMAMPUANMENGUASAI KALIMAT PREDIKAT KATA KERJA “SHI...DE” PADASISWA SMP
No full textAbstractGrammar is one of the main contents of language teaching. The same is true of chinese. One of the main words of chinese grammar is the verb predicate statement “ Shi…De”. The verb predicate statement “Shi…De” is a difficult problem in chinese grammar,especially junior high school students. Most students don’t know how to use verb to predicate statement “Shi…De” usage. In order to help students more easily grasp the verb predicate statement “Shi…De” usage,the author did experiment. First of all,the author of LKIA second-year students carried out a pre-test,and then the use of picture teaching aids for the three hours verb predicate statement “Shi…De” teaching. Through the post-test, the author found that the use of picture teaching helped students to improve their ability on the verb predicate statement “Shi…De”. Keywords: grammar, picture teaching aids, predicate statement “Shi…De
Harmony and discord within the English ‘counter-culture’, 1965-1975, with particular reference to the ‘rock operas’ Hair, Godspell, Tommy and Jesus Christ Superstar
No full textPhDThis thesis considers the discrete, historically-specific theatrical and musical sub-genre of ‘Rock Opera’ as a lens through which to examine the cultural, political and social changes that are widely assumed to have characterised ‘The Sixties’ in Britain. The musical and dramatic texts, creation and production of Hair (1967), Tommy (1969), Godspell (1971), Jesus Christ Superstar (1970) and other neglected ‘Rock Operas’ of the period are analysed. Their great popularity with ‘mainstream’ audiences is considered and contrasted with the overwhelmingly negative and often internally contradictory reaction towards them from the English ‘counter-culture’. This examination offers new insights into both the ‘counter-culture’ and the ‘mainstream’ against which it claimed to define and differentiate itself.
The four ‘Rock Operas’, two of which are based upon Christian scriptures, are considered as narratives of spiritual quest. The relationship between the often controversial quests for re-defined forms of faith and the apparently precipitous ‘secularization’ and ‘de-Christianization’ of British society during the 1960s and 1970s is considered.
The thesis therefore analyses the ‘Rock Operas’ as significant, enlightening prisms through which to view many of the profound societal debates – over ‘faith’ and ‘belief’ in the widest senses, sexuality, the Vietnam war, generational conflict, drugs and ‘spiritual enlightenment’, and race – which were, to some considerable extent, elevated onto the national, political agenda by the activities of the broadly-defined ‘counter-culture’. It considers subsequent representations of the ‘counter-culture’ as the root of a contested but enduring popular legacy of ‘The Sixties' as a period of profound cultural change
Analisis Kualitas Pelayanan Publik Kantor Keuchik Gampong Empee Trieng Berdasarkan Asas Penyelenggaraan Pemerintah Pada Pelayanan Umum
Get PDFThe government is expected to develop a public service paradigm from a centralized service to a service that focuses more on community satisfaction-oriented management. Moreover, the village apparatus (gampong in Acehnese language) as part of the state apparatus has a direct relationship so that they should better understand the living conditions of the people who are within the scope of their administration. In this case, the author takes a case study of the Gampong Empee Trieng Government, where the author performed community service tasks. To meet the demands of excellent administrative services, Gampong government officials are required to provide good services, especially in providing professional services, having work systems and service procedures that are transparent, integrated, responsive, and adaptive to any changes. This study uses a descriptive approach with qualitative research that will provide an overview of how the performance of the Gampong Empee Trieng government in improving the quality of public services for its people. The three principles of government administration that focus on public services will be used as indicators to measure the quality of public services in Gampong Empee Trieng, Darul Kamal District, Aceh Besar District
Anaerobic digestion of palm oil mill effluent with lampung natural zeolite as microbe immobilization medium and digested cow manure as starter
No full textAnaerobic treatment of palm oil mill effluent in batch reactor with digested biodiesel waste as starter and natural zeolite for microbial immobilization
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