Determination of the transition point in a boundary layer by the measurement of pressure fluctuation

A method is developed for determining the laminar-to-turbulent transition point in a boundary layer. The method involves the measurement of pressure on the surface of the body and the computation of pressure fluctuations. This method of determining the transition point is suitable when visualization methods cannot be used

Prevention of cyber crime in the primary and secondary school

The article discusses the current state of knowledge of pupils in primary and secondary schools on cyber crime and their attitudes towards it. Based on the survey was obtained data on the attitudes of students to various illegal activities when using computers. The results of the evaluation data were then proposed recommendations for the preparation of teaching materials that teachers use in every teaching through computers and in computer science.Článek pojednává o současném stavu vědomostí žáků základních a středních škol o počítačové kriminalitě a o jejich postojích k ní. Na základě dotazníkového šetření byla získána data o postojích žáků k různým nelegálním činnostem při použití počítačů. Z výsledků vyhodnocení dat pak byly navrženy doporučení pro přípravu výukových materiálů které by učitelé využívali při každé výuce pomocí počítačů zejména při výuce informatiky.The article discusses the current state of knowledge of pupils in primary and secondary schools on cyber crime and their attitudes towards it. Based on the survey was obtained data on the attitudes of students to various illegal activities when using computers. The results of the evaluation data were then proposed recommendations for the preparation of teaching materials that teachers use in every teaching through computers and in computer science

Infrared optical properties of Pr2CuO4

The ab-plane reflectance of a Pr2CuO4 single crystal has been measured over a wide frequency range at a variety of temperatures, and the optical properties determined from a Kramers-Kronig analysis. Above ~ 250 K, the low frequency conductivity increases quickly with temperature; the resistivity follows the form e^(E_a/k_BT), where E_a ~ 0.17 eV is much less than the inferred optical gap of ~ 1.2 eV. Transport measurements show that at low temperature the resistivity deviates from activated behavior and follows the form e^[(T_0/T)^1/4], indicating that the dc transport in this material is due to variable-range hopping between localized states in the gap. The four infrared-active Eu modes dominate the infrared optical properties. Below ~ 200 K, a striking new feature appears near the low-frequency Eu mode, and there is additional new fine structure at high frequency. A normal coordinate analysis has been performed and the detailed nature of the zone-center vibrations determined. Only the low-frequency Eu mode has a significant Pr-Cu interaction. Several possible mechanisms related to the antiferromagnetism in this material are proposed to explain the sudden appearance of this and other new spectral features at low temperature.Comment: 11 pages, 7 embedded EPS figures, REVTeX

Constance Phaulkon: Myth or reality?

This journal has been published at different time periods under the following titles: Explorations: A Graduate Student Journal of Southeast Asian Studies, Explorations in Southeast Asian Studies, and The Journal of the Southeast Asian Studies Association.The Student Activities Program Fee Boar

OPTIMASI FORMULA TABLET EKSTRAK DAUN SAMBUNG NYAWA(Gynura procumbens (Lour.) Merr) DENGAN KOMBINASI BAHAN PENGIKAT NATRIUM KARBOKSIMETIL SELULOSA DAN BAHAN PENGHANCUR STARCH 1500 DENGAN METODE FACTORIAL DESIGN

Daun sambung nyawa (Gynura procumbens (Lour.) Merr) adalah salah satu tanaman yang berkhasiat sebagai antikanker. Penggunaan daun sambung nyawa dimasyarakat masih secara tradisional, sehingga perlu dikembangkan menjadi bentuk sediaan yang lebih stabil dalam penyimpanan dan penggunan yaitu tablet. Penelitian ini bertujuan untuk melihat pengaruh bahan pengikat Na CMC dan bahan penghancur Strach 1500 terhadap sifat fisik tablet yang dihasilkan dengan metode factorial design. Serbuk daun sambung nyawa, diekstraksi dengan metode maserasi sampai didapatkan ekstrak kental, kemudian ekstrak dicampur dengan bahan-bahan lain sampai terbentuk campuran granul. Tablet dibuat menjadi 4 formula dengan variasi konsentrasi bahan pengikat dan bahan penghancur berbanding sebagai berikut:1%-2%, 6%-2%, 1%-10%, 6%-10%. Dilakukan uji granul meliputi: uji kecepatan alir, sudut diam, pengetapan, densitas massa dan kadar air, setelah itu granul dibuat tablet dan diuji sifat fisik tablet meliputi: uji keseragaman bobot, kekerasan , kerapuhan dan waktu hancur tablet. Data dianalisis menggunakan metode factorial design dan didapatkan titik optimum pada counter plot supper imposed. Berdasarkan titik optimum didapatkan formula optimum untuk diverifikasi. Validitas hasil verifikasi dengan hasil prediksi berdasarkan metode factorial design diuji statistik dengan menggunakan progam SPSS versi 17 dengan uji one sample t-Test dengan taraf kepercayaan 95%. Hasil penelitian menunjukkan adanya pengaruh antara bahan pengikat dan bahan penghancur, yakni kenaikan konsentrasi Na CMC dan penurunan konsentrasi Strach 1500, dapat menurunkan kecepatan alir, meningkatkan kekerasan tablet dan memperlama waktu hancur tablet. Pada daerah counter plot imposed didapatkan daerah optimum dengan perbandingan Na CMC 0,81 mg dan Strach 1500 30,17 mg

Pengaruh Kombinasi Avicel Ph 101 Dan Amilum Manihot Sebagai Bahan Penghancur Terhadap Sifat Fisis Tablet Parasetamol

The aims of this study was to find out the influence of Avicel PH 101, tapioca starch and the combinationboth of Avicel PH 101 and tapioca starch as a disintegrant to physical properties of acetaminophen tablets. Three formula were prepared containingof different disintegrant in each formula, and tablets were made by wet granulation method.Formula I with disintegrant Avicel PH 101 100%. Formula II with disintegrant amilum starch 100%, and formula III with combination Avicel PH 101 50% and tapioca starch 50%. Flow rates of the granule were tested and physical propertiesof tablets includes of weight uniformity, hardness, friability, and disintegrationtime were tested. Formula I containing Avicel PH 101 as a disintegrant produced hardest tablets (6.28 kg), smallest friability (0.6279 %), and fastest disintegration time (3.03 minutes). Tablets formula II containing tapioca strach as a disintegrant produced softest tablets (5.66 kg), highest friability (0.8513 %), and slowest disintegration time (6.06 minutes).While formula III containing Avicel PH 101 and tapioca strach as disintegrant produced harder tablets (6.08 kg), smaller friability (0.6985%), and faster disintegration time (3.89 minutes) than formula II. Keywords : Avicel PH 101, tapioca strach, acetaminophen

Identita v díle Zadie Smith Bílé Zuby

The bachelor work focuses on the question of maintaining a religious identity in a multicultural society, namely today's Britain. Using Zadie Smith's novel White Teeth, it explores the conflicts that can arise during the coexistence of both eastern and western culture. It also looks at the differences between the first and second generation family members portrayed in the novel. Particular attention is also paid to the religious identity of the ethnic and minority groups living in British society. The work also analyzes the changes in one's own perception of self identity whilst living in and experiencing the effects of British culture.Bakalářská práce se zaměřuje na otázku zachování náboženské identity v multikulturní společnosti, a to v současné Británii. Na základě knihy Zadie Smith Bílé zuby, práce zkoumá konflikty, které mohou vznikat ze vzájemného soužití západní a východní společností. Dále poukazuje na rozdíly mezi první a druhou generací členů tří rodin, přičemž zvláštní pozornost je věnována významu náboženské identity u etnických a menšinových skupin žijících v britské společnosti. Velká část práce je také věnována analýze změn ve vnímání vlastní identity pod vlivem britské kultury.Katedra anglistiky a amerikanistikyDokončená práce s úspěšnou obhajobo

Investigation of A1g phonons in YBa2Cu3O7 by means of LAPW atomic-force calculations

We report first-principles frozen-phonon calculations for the determination of the force-free geometry and the dynamical matrix of the five Raman-active A1g modes in YBa2Cu3O7. To establish the shape of the phonon potentials atomic forces are calculated within the LAPW method. Two different schemes - the local density approximation (LDA) and a generalized gradient approximation (GGA) - are employed for the treatment of electronic exchange and correlation effects. We find that in the case of LDA the resulting phonon frequencies show a deviation from experimental values of approximately -10%. Invoking GGA the frequency values are significantly improved and also the eigenvectors are in very good agreement with experimental findings.Comment: 15 page

Partial Perception and Approximate Understanding

What is discussed in the present paper is the assumption concerning a human narrowed sense of perception of external world and, resulting from this, a basically approximate nature of concepts that are to portray it. Apart from the perceptual vagueness, other types of vagueness are also discussed, involving both the nature of things, indeterminacy of linguistic expressions and psycho-sociological conditioning of discourse actions in one language and in translational contexts. The second part of the paper discusses the concept of conceptual and linguistic resemblance (similarity, equivalence) and discourse approximating strategies and proposes a Resemblance Matrix, presenting ways used to narrow the approximation gap between the interacting parties in monolingual and translational discourses

The Ruling Discourse on Proper Womanhood in the Hungarian Parliament

Starting with a debate in September 2012 on the incorporation of domestic violence as a distinct offence in Hungary’s new Criminal Code, the issue of gender and proper womanhood has regularly re-surfaced in statements made by ruling coalition MPs in parliamentary debates. Drawing on discourse analysis, this study investigates a selection of these statements in the context of the government’s current policy and public discourse. The paper argues that these discourses outline an essentialist model reflective of a dominant ideology that is traditional, Christian, patriarchal and heteronormative, which, by hinting at women’s accountability for certain social ills, also allows for a chain of associations that ultimately results in the subversion of the overall social status of women, dividing and marginalising them further and discrediting any claims or actions aimed at establishing a more egalitarian society in the country