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排序方式: 共有72条查询结果,搜索用时 31 毫秒
1.
Stepanova O. M. Kazak A. V. Astafiev A. M. Pinchuk M. E. Simonchik L. V. 《Technical Physics Letters》2018,44(9):841-843
Technical Physics Letters - The spatial distribution of gas temperature in air plasma jet of dc glow microdischarge has been determined. The temperature field was measured by a thermocouple probe... 相似文献
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Journal of Engineering Physics and Thermophysics - This paper describes methods and approaches for numerical simulation of liquid metal flows in a direct current (DC) arc furnace with a bottom... 相似文献
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Semiconductors - “Herein, we consider the technologies of obtaining composite structures that can exhibit the properties of metamaterials, namely layered metal–dielectric... 相似文献
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Katarzyna Tokarczyk-Dorociak Jan K. Kazak Szymon Szewrański Anna Haładyj Łukasz Szkudlarek Grzegorz Chrobak 《影响评估与项目评价》2019,37(2):150-164
Guidelines and instructions for Environmental Impact Assessment and Strategic Environmental Assessment (together referred to as EA here) are developed to improve the quality of legal requirements’ implementation and to support EA procedure accomplishment. However, to date, it has not been checked whether they are useful for practitioners. Therefore, the aim of the study underlying this paper was to verify, based on the experience of Polish EA experts, whether guidelines and instructions are useful in their everyday work. A qualitative study comprising of a questionnaire survey and interviews tested whether (1) EA practitioners know and use the Polish and EU guidelines, (2) how EA practitioners evaluate the validity and usefulness of such instructions, and (3) in which areas there is a lack of instructions and guidelines. The results show a low level of knowledge of national and EU handbooks. Those guidelines focusing on legal procedures, road investments and designing animal passageways are considered to be the most useful. Moreover, practitioners indicate that EU guidelines should be translated into Polish. Most important for practitioners is the linking of guidelines with the EA procedure, so that they can become a platform for dialogue of all stakeholders. 相似文献
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Katarzyna Tokarczyk-Dorociak Jan K. Kazak Haładyj Anna Szymon Szewrański Małgorzata Świąder 《影响评估与项目评价》2019,37(3-4):279-291
The paper presents the results of an evaluation of the effectiveness of SEA obtained as a result of a survey with the participation of stakeholders. In Poland, several hundred SEAs are conducted annually at the local and regional levels and several at the national level. Although the survey demonstrated that SEA is evaluated as effective or quite effective, the respondents pointed to several irregularities in the non-procedural dimension of effectiveness. The main ones in terms of substantive effectiveness are that SEA is rarely used to help develop plans/programmes and procedures are highly politicised. Moreover, low effectiveness in terms of variant assessment and cumulative impacts and nearly non-existent monitoring of the actual effects of implementing plans/programmes influence substantive effectiveness significantly. The respondents pointed to the problem resulting from the fact that plan-makers are unwilling to take into account the SEA recommended changes. They also emphasised that there are certain attempts to put pressure on SEA consultants to make the conclusions less stringent. Respondents indicate that in Poland the costs associated with conducting SEA often outweigh the profits. The research shows that the society is properly informed about SEA, but public involvement is still low. 相似文献
7.
A. A. Gvozdev N. V. Usol’tseva M. V. Kozinez A. V. Kazak A. I. Smirnova N. N. Rozhkova 《Journal of Friction and Wear》2016,37(2):155-159
It has been shown that the addition of a geotribomodifier to engine oil and the processing of rubbing surfaces by metal-cladding agent substantially reduce the mechanical loss (up to 45%) and the heat generation in the contact zone (by 38%) and increases the load-carrying ability (by 61%). The optimal concentration of the friction geotribomodifier additive in oil has been established. 相似文献
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A. A. Kazak E. A. Melnikova A. L. Tolstik U. V. Mahilny A. I. Stankevich 《Technical Physics Letters》2008,34(10):861-863
The characteristics of electric-field-controlled diffraction elements based on a nematic liquid crystal and a new photoalignment polymer have been studied. The photocross-linking of this polymer allows periodic oriented structures and liquid crystal phase gratings with a 30% diffraction efficiency in the first order to be formed. 相似文献
10.
Veysel T. Yilmaz Evrim Senel Canan Kazak 《Journal of Inorganic and Organometallic Polymers and Materials》2008,18(3):407-413
The reaction of [Cu(sac)2(H2O)4] · 2H2O with 2-methylpyrazine (mpyz) leads two complexes, concomitant crystallization of a mononuclear complex [Cu(sac)2(mpyz)(H2O)2] (1) and a polymeric complex [Cu(sac)2(μ-mpyz)]n (2). Both complexes have been characterized by elemental analyses, magnetic measurements, FT-IR and ESR, TG-DTA and single-crystal
X-ray diffraction analyses. Single-crystal X-ray analyses show that complex 1 consists of discrete molecules in which the copper(II) ions exhibits a square-pyramidal coordination geometry. The individual
molecules of 1 are connected into a hydrogen-bonded chain structure, which is further assembled to form a three-dimensional network by π–π stacking interactions.
Complex 2 is an 1D coordination polymer in which copper(II) centers are bridged by the mpyz ligand. The chains are further assembled
to form two-dimensional frameworks by π–π and C–H···π stacking interactions. 相似文献