PENGARUH PERHATIAN ORANG TUA, PERGAULAN SISWA, DAN BIMBINGAN BELAJAR SISWA DI SEKOLAH TERHADAP KETEKUNAN BELAJAR SISWA KELAS XI TEKNIK GAMBAR BANGUNAN SMK NEGERI 1 SEYEGAN YOGYAKARTA

Penelitian ini bertujuan untuk mengetahui: (1) pengaruh perhatian orang tua, pergaulan siswa, dan bimbingan belajar siswa di sekolah terhadap ketekunan belajar siswa Kelas XI Teknik Gambar Bangunan SMK Negeri 1 Seyegan Yogyakarta; dan (2) tingkat perhatian orang tua, pergaulan siswa, bimbingan belajar di sekolah, dan ketekunan belajar siswa Kelas XI Teknik Gambar Bangunan SMK Negeri 1 Seyegan Yogyakarta. Populasi penelitian ini adalah kelas XI Teknik Gambar Bangunan SMK Negeri 1 Seyegan. Jenis penelitian ini adalah ex post facto. Jumlah sampel ditentukan berdasarkan pada tabel Krejcie dan Morgan dengan mengambil tingkat kesalahan α sebesar 5%. Jumlah sampel diambil secara simple random terhadap populasi yang bersangkutan. Sampel dipilih secara acak, dengan cara tersebut diperoleh jumlah sampel sebanyak 30 siswa. Hipotesis dalam penelitian ini diuji dengan analisis regresi linier metode enter dengan bantuan program SPSS V. 19. Hasil penelitian ini menunjukkan bahwa: (1) terdapat pengaruh yang positif dan signifikan antara perhatian orang tua terhadap ketekunan belajar siswa kelas XI TGB SMK N 1 Seyegan (p < 0,05); (2) terdapat pengaruh yang positif dan signifikan antara pergaulan siswa terhadap ketekunan belajar siswa kelas XI TGB SMK N 1 Seyegan (p < 0,05); (3) terdapat pengaruh yang positif dan signifikan antara bimbingan belajar siswa di sekolah terhadap ketekunan belajar siswa kelas XI TGB SMK N 1 Seyegan (p < 0,05); dan (4) terdapat pengaruh yang positif dan signifikan antara perhatian orang tua, pergaulan siswa, dan bimbingan belajar siswa di sekolah terhadap ketekunan belajar siswa kelas XI TGB SMK N 1 Seyegan (p < 0,05); dan (5) tingkat perhatian orang tua = 73,09%; pergaulan siswa = 76,66%; bimbingan belajar di sekolah = 71,87%; dan ketekunan belajar siswa = 74,05%

Cova de Can Sadurní, la transformació d’un jaciment. L’episodi sepulcral del neolític postcardial

The present study deals with the structural characterization and classification of the novel compounds <b>1</b>–<b>8</b> into perovskite subclasses and proceeds in extracting the structure–band gap relationships between them. The compounds were obtained from the employment of small, 3–5-atom-wide organic ammonium ions seeking to discover new perovskite-like compounds. The compounds reported here adopt unique or rare structure types akin to the prototype structure perovskite. When trimethylammonium (TMA) was employed, we obtained TMASnI₃ (<b>1</b>), which is our reference compound for a “perovskitoid” structure of face-sharing octahedra. The compounds EASnI₃ (<b>2b</b>), GASnI₃ (<b>3a</b>), ACASnI₃ (<b>4</b>), and IMSnI₃ (<b>5</b>) obtained from the use of ethylammonium (EA), guanidinium (GA), acetamidinium (ACA), and imidazolium (IM) cations, respectively, represent the first entries of the so-called “hexagonal perovskite polytypes” in the hybrid halide perovskite library. The hexagonal perovskites define a new family of hybrid halide perovskites with a crystal structure that emerges from a blend of corner- and face-sharing octahedral connections in various proportions. The small organic cations can also stabilize a second structural type characterized by a crystal lattice with reduced dimensionality. These compounds include the two-dimensional (2D) perovskites GA₂SnI₄ (<b>3b</b>) and IPA₃Sn₂I₇ (<b>6b</b>) and the one-dimensional (1D) perovskite IPA₃SnI₅ (<b>6a</b>). The known 2D perovskite BA₂MASn₂I₇ (<b>7</b>) and the related all-inorganic 1D perovskite “RbSnF₂I” (<b>8</b>) have also been synthesized. All compounds have been identified as medium-to-wide-band-gap semiconductors in the range of <i>E</i>_g = 1.90–2.40 eV, with the band gap progressively decreasing with increased corner-sharing functionality and increased torsion angle in the octahedral connectivity

Essays on Global Supply Chains and Trade Policies

The structure of international trade has become increasingly complex in recent decades. Advances in productivity, transportation, and information and communications technology (ICT) have significantly changed the nature of cross-border activities between countries, and global supply chains have become a substantial component of the world economy. Despite the importance of global supply chains, most existing studies take them as fixed and generally overlooked their endogenous responses to trade policies and economic shocks. This dissertation examines the role of global supply chains in shaping trade and welfare consequences of modern trade agreements, such as preferential trade agreements (PTAs). The first chapter of this dissertation studies the trade effect of supply chain reallocations, with a focus on producers' endogenous input sourcing decisions. I first introduce a global sourcing framework where producers optimally choose their input sourcing locations based on tradeoffs between variable input prices and fixed sourcing costs. As one of the major characterizations of the global supply chain structure, the distribution of producers' sourcing locations will endogenously respond to economic and trade conditions, amplifying the corresponding impact on input trade flows. Based on the model-implied relationship between individual import values and the number of imported intermediate products for any given sourcing location, I find supporting evidence of this transmission channel using US product-level import data. The estimation results indicate that an increase in expected import values or a reduction in fixed sourcing costs equivalent to a 10% annual average import value would induce around a 1% increase in the number of US producers sourcing from a given location. To capture the cross-country and cross-sector transmission and spillovers generated by global supply chains, the second chapter extends the global sourcing framework introduced in Chapter 1 to a general equilibrium (GE) structure and further studies the welfare consequences of several trade policy events. In addition to their input sourcing decisions, producers also make market entry decisions, which determine the size of domestic supply chains. These two decisions jointly characterize the supply chain structure in the model. I then calibrate the model to the World Input-Output Database (WIOD) and use it to quantify the trade and welfare consequences of two hypothetical trade policy changes, namely a US-China tariff war and the elimination of all preferential trade agreements. The quantitative analysis reveals two novel angles through which global supply chains transmit shocks. First, allowing endogenous supply chain reallocations amplifies the trade and welfare consequences of shocks to variable trade costs. Second, changes in fixed sourcing costs are essential in welfare evaluation and could generate a larger impact than similar changes in variable trade costs. These results suggest an important role of supply chain reallocations and fixed sourcing costs in shaping the macroeconomic impact of trade shocks. In the third chapter, I examine dynamic features of global supply chains by investigating the interaction between global supply chains and preferential trade agreements during the Great Trade Collapse (GTC) and the subsequent recovery. Using time-series data from WIOD, I first empirically test the relationship between bilateral trade flows and PTA status using a gravity specification. The estimated results indicate that a bilateral PTA relation can generate additional effects for supply chain-related (intermediate) trade during post-GTC recovery. I then introduce a novel method to decompose the impact of PTAs into a direct border price channel and an indirect behind-border channel. With the data structure of WIOT and some additional assumptions, I find that: (i) the structure of global supply chains changed significantly after the GTC, and behaved differently across countries; (ii) the border price channel was dominant before the GTC, the behind-border channel contributed considerably to the recovery of GVC-related trade and accounted for 26% of the aggregate impact. These results suggest an important role of PTAs in securing GVC growth after the GTC

Thermodynamics of quark matter with multiquark clusters in an effective Beth-Uhlenbeck type approach

We describe multiquark clusters in quark matter within a Beth-Uhlenbeck approach in a background gluon field coupled to the underlying chiral quark dynamics using the Polyakov gauge which establishes the center symmetry of color SU(3) that suppresses colored states as an aspect of confinement. Quark confinement is modeled by a large quark mass in vacuum motivated by a confining density functional approach. A multiquark cluster containing $n$ quarks and antiquarks is described as a binary composite of smaller subclusters $n_1$ and $n_2$ ($n_1+n_2=n$). It has a spectrum consisting of a bound state and a scattering state continuum. For the corresponding cluster-cluster phase shifts we discuss simple ans\"atze that capture the Mott dissociation of clusters as a function of temperature and chemical potential. We go beyond the simple "step-up-step-down" model that ignores continuum correlations and introduce an improved model that includes them in a generic form. In order to explain the model, we restrict ourselves here to the cases where the cluster size is $1 \le n \le 6$. A striking result is the suppression of the abundance of colored multiquark clusters at low temperatures by the coupling to the Polyakov loop and their importance for a quantitative description of lattice QCD thermodynamics at non-vanishing baryochemical potentials. An important ingredient are Polyakov-loop generalized distribution functions of $n$-quark clusters which are derived here for the first time. Within our approach we calculate thermodynamic properties such as baryon density and entropy. We demonstrate that the limits of a hadron resonance gas at low temperatures and $\mathcal{O}(g^2)$ perturbative QCD at high temperatures are correctly reproduced. A comparison with lattice calculations shows that our model is able to give a unified, systematic approach to describe properties of the quark-gluon-hadron system.Comment: 20 pages, 11 figures, 6 table

1871-03-16 Flemingsburg Democrat

Flemingsburg Democrat published on March 16, 1871

Riista ja riistää

Fi. riista und riistää (saksa)Kielenainekseta(a)lto (kieli: suomi, sivulla: 146)jalu-riist (kieli: viro, sivulla: 153)jooma-riist (kieli: viro, sivulla: 154)juust (kieli: viro, sivulla: 147)juusto (kieli: suomi, sivulla: 146, 147)jy(y)stää (kieli: suomi, sivulla: 147)ka(a)rna (kieli: suomi, sivulla: 146)kaarn (kieli: viro, sivulla: 146)kaista (kieli: suomi, sivulla: 146)kalu (kieli: suomi, sivulla: 153, 157)kappale (kieli: suomi, sivulla: 153)karna, kaarna (kieli: suomi, sivulla: 146)kiista (kieli: suomi, sivulla: 142)kiistää (kieli: suomi, sivulla: 142)kiskoa (kieli: suomi, sivulla: 152)kuurne (kieli: suomi, sivulla: 147)kuuro (kieli: suomi, sivulla: 147)kä(ä)rme (kieli: suomi, sivulla: 146)kääppä (kieli: suomi, sivulla: 147)laattia (kieli: suomi, sivulla: 146)lattia (kieli: suomi, sivulla: 146)liista (kieli: suomi, sivulla: 144)liista (kieli: suomi, sivulla: 154)liiste (kieli: suomi, sivulla: 144)lista (kieli: suomi, sivulla: 146)listiä (kieli: suomi, sivulla: 152)lõhk (kieli: viro, sivulla: 148)lohko (kieli: suomi, sivulla: 148)majariist (kieli: viro, sivulla: 153)neuvo (kieli: suomi, sivulla: 154, 157)nõu (kieli: viro, sivulla: 154)pa(a)sto (kieli: suomi, sivulla: 147)paast (kieli: viro, sivulla: 147)rastas (kieli: suomi, sivulla: 147)riehtilä (kieli: suomi, sivulla: 146)riist (kieli: viro, sivulla: 153)riista (kieli: suomi, sivulla: 142, 153)riistainen (kieli: suomi, sivulla: 144)riistan (kieli: suomi, sivulla: 155)riiste (kieli: suomi, sivulla: 143)riisteellinen (kieli: suomi, sivulla: 144)riisteinen (kieli: suomi, sivulla: 144)riistettyä (kieli: suomi, sivulla: 151)riistoa (kieli: suomi, sivulla: 151)riistyä (kieli: suomi, sivulla: 151)riistää (kieli: suomi, sivulla: 142, 149)riitta (kieli: suomi, sivulla: 142)riittää (kieli: suomi, sivulla: 142)rikkoa (kieli: suomi, sivulla: 146)rista (kieli: suomi, sivulla: 146)ruode (kieli: suomi, sivulla: 144)ruot|a, -o (kieli: suomi, sivulla: 144)rästäs (kieli: suomi, sivulla: 147)räästas (kieli: viro, sivulla: 147)sõa-riist (kieli: viro, sivulla: 153)sälö (kieli: suomi, sivulla: 148)särö (kieli: suomi, sivulla: 147)säröillä (kieli: suomi, sivulla: 147)säröinen (kieli: suomi, sivulla: 148)vaaja (kieli: suomi, sivulla: 146)vai (kieli: viro, sivulla: 146)vapa (kieli: suomi, sivulla: 144)vave (kieli: suomi, sivulla: 144)viikko (kieli: suomi, sivulla: 147)viljalti (kieli: suomi, sivulla: 155)viljan (kieli: suomi, sivulla: 155)viljand (kieli: viro, sivulla: 155)vilju (kieli: viro, sivulla: 155

Особенности оценивания эффективности информационных систем и технологий

The task of creating a methodology for evaluating the efficiency of information systems and technologies is considered. A distinctive feature of information systems is their service nature which results in the need of indirect estimation of their efficiency through terminal positive effect of metasystem, for the benefit of which this system was created or adapted. The brief summary of the existing approaches and techniques for estimating efficiency of information systems and technologies is provided. Ambiguity of the used efficiency measurements, resulting in the difficulties of the creation of a formalized, numerical technique for efficiency estimation, was revealed. The quantitative efficiency evaluations of an information system, which take into account the probabilistic nature of the basic data used for creation of these estimates, are offered. The options of necessary and sufficient criteria for efficiency of information systems, expressed through efficiency of metasystems for the benefit of which they function, are provided.Рассмотрена задача построения методологии оценки эффективности информационных систем и технологий, позволяющая количественно оценить результативность их применения. Особенностью информационных систем является их сервисный характер, что приводит к необходимости косвенного оценивания их эффективности через терминальный положительный эффект метасистемы, в интересах которой данная система была создана или адаптирована. Приведен краткий обзор существующих подходов и методик к оцениванию эффективности информационных систем и технологий. Установлена неоднозначность используемых определений эффективности, и как следствие, сложности построения формализованной количественной методики ее оценивания. Предложены количественные оценки эффективности информационной системы, учитывающие вероятностную природу исходных данных, используемых для построения этих оценок. Представлены варианты необходимых и достаточных критериев эффективности информационных систем, выраженные через эффективность метасистем, в интересах которых они функционируют