Characterization of Mo-Containing Systems Supported on AlPO4-5 and Aluminium Phosphate and Their Behavior in Thiophene Conversion

1992 ◽  
Vol 57 (4) ◽  
pp. 836-844 ◽  
Author(s):  
Alla A. Spojakina ◽  
Nina G. Kostova ◽  
Ljubomir Dimitrov
Keyword(s):  
Hydrogen Sulfide ◽  
Ir Spectroscopy ◽  
Chemical Interaction ◽  
Aluminium Phosphate ◽  
Thiophene Conversion ◽  
The Difference ◽  
The Impact

The properties of AlPO4-5 with zeolite-like structure and amorphous aluminium phosphate modified by nickel and/or molybdenum (1 wt.% and 10 wt.%, respectively) have been studied using ESR and IR spectroscopy and catalytic testing in hydrodesulfurization (HDS) of thiophene. The chemical interaction between all components of catalysts with formation of polymolybdate structures is revealed. The impact of the support is reflected in the difference of composition of polymolybdates, and different interactions with the hydrogen sulfide eliminated in thiophene conversion. The selectivity of the thiophene conversion and adsorption of H2S eliminated depend on the method of introduction of components only for AlPO4-5.

scholarly journals G. E. LESSING'S LAOCOON: THE POTENTIAL OF THE SEMANTIC APPROACH

2020 ◽  
pp. 23-27
Author(s):  
H. D. Mylenka
Keyword(s):  
Large Array ◽  
Semantic Approach ◽  
Key Concepts ◽  
Different Types ◽  
The Difference ◽  
Organic Combination ◽  
The Impact ◽  
Semantic Aspect ◽  
Theoretical Developments

Despite the large array of studies of the theoretical heritage of the German enlightener, this aspect has been most fully developed in the works of I.G. Gerder (article "Critical forests"), R. Ingarden (monograph "Research in aesthetics") and E. Basin (monograph "Art and communication"). In updating the potential of the semantic problematic of Laocoon, considerable assistance is provided by the recourse to studies in which the fruitfulness and relevance of this aspect of the Lessing tract is emphasized to one degree or another. There is an attempt to analyze, in one theoretical space, works on Lessing theory of signs. In order to identify the essence of the disagreement between I.G. Gerder and G.E. Lessing in the field of establishing boundaries between the kinds of art, special attention is paid to the consideration of Gerder concept of comparative analysis of painting, music and poetry, which is based on the difference of their ways of influence on the recipient – "in space", "in time "and" by force". In the process of analyzing Gerder's reflections, not only his critical attitude to the theory of signs developed by Lessing was considered, but also an attempt by the opponent of "Laokoon" author to justify the use of key concepts of metaphysics to compare the impact of different kinds of art. When comparing the views of E. Basin and R. Ingarden on the semantic aspect of "Laocoon", the debatable nature of their judgments about the characterization of the characters used in poetry by Lessing is identified. In addition, the article analyzes Lessing's thinking about the possibility of connecting different types of art, the organic combination of which depends on the specifics of the signs used by one or the other art, as well as emphasizes the productivity of the German thinker's idea. This aspect is revealed not only through the analysis of "Laokoon" in the works of E. Basin and R. Ingarden, but also by turning to the theoretical developments of E. Cassirer, B. Balash, A. Vartanova. Thus, the study of the semantic issues of Laokoon has shown the prominence of its conceptual landmarks for theoretical search, both in the field of aesthetics and art.

Response of FPSO Systems to Squalls

2011 ◽  
Author(s):  
Arun Duggal ◽  
Caspar Heyl ◽  
Amir H. Izadparast ◽  
Joerik Minnebo
Keyword(s):  
Wind Speed ◽  
Global Analysis ◽  
Single Degree Of Freedom ◽  
Transient Phenomena ◽  
Analysis Techniques ◽  
Extreme Response ◽  
Speed Up ◽  
The Difference ◽  
The Impact

Squalls are mesoscale sudden wind-speed increases that can occur worldwide and are a design driver for FPSO systems in areas the other design environmental conditions are relatively benign, e.g. offshore West Africa. Squalls are transient winds which rapidly reach a peak wind speed (up to 50 m/s) and then decay to low speeds in a span of 60 to 90 minutes. As squalls are transient phenomena traditional steady-state analysis techniques cannot be used for the global analysis or the development of the extreme response estimates. This paper focuses on the characterization of the squall environment and the impact of various parameters on the response of FPSOs. The responses of both spread and turret moored FPSOs are presented and the difference in response is discussed. The paper then focuses on a parametric study on a representative single degree of freedom model of a spread-moored FPSO with an emphasis on the estimation of the extreme response and its dependence on sample size.

Characterization of Highway Traffic Noise Generated by Rigid Pavement Contraction Joints

2003 ◽  
Author(s):  
Lawrin Ellis ◽  
Christopher Niezrecki ◽  
David Bloomquist
Keyword(s):  
Traffic Noise ◽  
Test Methods ◽  
Concrete Pavements ◽  
Highway Traffic ◽  
Rigid Pavement ◽  
Contraction Joints ◽  
The Difference ◽  
Current Concerns ◽  
The Impact

Contraction joints in rigid (concrete) pavements are required to permit expansion of each monolithic section of roadway. At higher speeds, the major source of highway noise is attributed to vehicle tire/roadway interaction. Current concerns about limiting the impact of highway traffic noise, has forced transportation agencies to consider strategies to control noise generated by tire/roadway interaction. Within this work the difference in noise generated by 1/4 versus 3/8-inch joint widths is conducted. The study focuses on passenger vehicles including a sedan and a light duty van/truck. Both vehicle in-cabin and roadside noise levels are measured for vehicle speeds of 50, 60, and 70 miles per hour. For the sedan, the minimum and maximum observed in-cabin differences were determined to be 1.08 and 1.82 dB(A), respectively. Minimum and maximum observed roadside differences are 1.19 and 2.58 dB(A), respectively. Van tests resulted in minimum and maximum observed in-cabin differences of 0.60 and 1.09 dB(A) and minimum and maximum observed roadside differences of 1.05 and 3.18 dB(A), respectively. This paper contains details of reference standards, test methods, and the results obtained.

scholarly journals Modification Bentonite Using Fe(III) and Its Application as Adsorbent for Phenol

2020 ◽  
Vol 9 (6) ◽  
pp. 422-431
Author(s):  
Muhammad Said ◽  
Widya Twiny Rizki ◽  
Widia Purwaningrum ◽  
Addy Rachmat ◽  
Ferlinahayati Ferlinahayati ◽  
...  
Keyword(s):  
Adsorption Process ◽  
Chemical Interaction ◽  
Xrd Analysis ◽  
Phenol Adsorption ◽  
First Order ◽  
Type Iv ◽  
Bet Analysis ◽  
Isotherm Adsorption ◽  
The Difference

Modification of bentonite material using doping Fe(III) was conducted. The purpose of this study is to increase the capacity and effectiveness of bentonite adsorption. The characterization of material was carried out using XRD, XRF, BET and FTIR spectrophotometers. The material produced were used as an adsorbent of phenol in an aqueous medium. The result of characterization material using XRD analysis was showed the difference between unmodified bentonite and modified bentonite, it is indicated from a shift of diffraction peak at 3-10°. The result of XRF analysis was showed the increasing of the iron element on doped bentonite, from 21.3 to 59.11%. The result of BET analysis was showed isotherm adsorption fitted to type IV, which indicates bentonite has a mesoporous type with a size 5-50 nm and natural bentonite has a smaller pore size than activated and doped bentonite. From the FTIR spectrum, there is no chemical interaction between adsorbent and adsorbate. The adsorption rate was fitted to pseudo-first-order. The maximum capacity of phenol adsorption at 60 minutes for controlled was 7.186% and for doped bentonite was 16.4651%. Thermodynamics study explained that the adsorption process occurred spontaneously. It can be concluded that modification bentonite use doping Fe(III) can enhance its ability to adsorbed phenol.

Evaluation of the impact of public investment programs on social and economic performance of territories

2019 ◽  
pp. 109-123
Author(s):  
I. E. Limonov ◽  
M. V. Nesena
Keyword(s):  
Bayesian Modeling ◽  
Positive Impact ◽  
Public Investment ◽  
Difference In Differences ◽  
The Public ◽  
Export Activity ◽  
Regional Investment ◽  
The Difference ◽  
The Impact ◽  
Development Institution

The purpose of this study is to evaluate the impact of public investment programs on the socio-economic development of territories. As a case, the federal target programs for the development of regions and investment programs of the financial development institution — Vnesheconombank, designed to solve the problems of regional development are considered. The impact of the public interventions were evaluated by the “difference in differences” method using Bayesian modeling. The results of the evaluation suggest the positive impact of federal target programs on the total factor productivity of regions and on innovation; and that regional investment programs of Vnesheconombank are improving the export activity. All of the investments considered are likely to have contributed to the reduction of unemployment, but their implementation has been accompanied by an increase in social inequality.

Analisis Karakterisasi Teknologi Direct Sequence Spread Spectrum Dan Frequency Hopping Spread Spectrum

2019 ◽  
Vol 2 (2) ◽  
pp. 129-138
Author(s):  
Fawzan Galib Abdul Karim Bawahab ◽  
Elvan Yuniarti ◽  
Edi Kurniawan
Keyword(s):  
Spread Spectrum ◽  
Communication Systems ◽  
Multiple Access ◽  
Frequency Hopping ◽  
Direct Sequence Spread Spectrum ◽  
Direct Sequence ◽  
Frequency Hopping Spread Spectrum ◽  
Two Systems ◽  
The Difference

Abstrak. Pada penelitian ini, telah dilakukan analisa karakterisasi pada teknologi Direct Sequence Spread Spectrum dan Frequency Hopping Spread Spectrum, sebagai salah satu teknik multiple-access pada sistem komunikasi. Karakterisasi dilakukan untuk mencari bagaimana cara meningkatkan keoptimalan kedua sistem tersebut, dalam mengatasi masalah interferensi dengan sistem dan channel yang sama. Dan juga untuk menentukan veriabel apa yang mempengaruhi keoptimalan kedua sistem tersebut. Karakterisasi dilakukan dengan menentukan variabel-variabel yang mempengaruhi keoptimalan keduanya. Hasil dari karakterisasi, diketahui variabel-variabel yang mempengaruhi kemampuan sistem DSSS yaitu nilai frekuensi spreading (). Sedangkan untuk sistem FHSS yaitu nilai frekuensi spreading ( dan ) dan selisih antara frekuensi hopping data dengan frekuensi hopping interferensi . Kata Kunci: BER, DSSS, FHSS, Interference, Spread spectrum. Abstract. In this study, characterization of Direct Sequence Spread Spectrum and Frequency Hopping Spread Spectrum technologies have been done, as one of the multiple-access techniques in communication systems. Characterization is done to find out how to improve the ability of the two systems, in solving interference problems with the same system and channel. And also to determine what veriabel affects the ability of the two systems. Characterization is done by determining the variables that affect the ability of both. The results of the characterization, known variables that affect the ability of the DSSS system are the spreading frequency value (). As for the FHSS system, the spreading frequency value ( and ) and the difference between frequency hopping data with frequency hopping interference .

The Use of Multimedia and its Impact on Bangladeshi EFL Learners at Tertiary Level

2020 ◽  
Vol 4 (2) ◽  
pp. 150
Author(s):  
Farzana Sharmin Pamela Islam
Keyword(s):  
Language Learning ◽  
Academic Writing ◽  
Teaching And Learning ◽  
English Language ◽  
Capital City ◽  
Tertiary Level ◽  
Language Classroom ◽  
The Difference ◽  
The Government ◽  
The Impact

As 21st century is the era of modern technologies with different aspects, it offers us to make the best use of them. After tape recorder and overhead projector (OHP), multimedia has become an important part of language classroom facilities for its unique and effective application in delivering and learning lesson. Although in many parts of Bangladesh, a South Asian developing country, where English enjoys the status of a foreign language, the use of multimedia in teaching and learning is viewed as a matter of luxury. However, nowadays the usefulness and the necessity of it are well recognized by the academics as well as the government. The study aims to focus on the difference between a traditional classroom void of multimedia and multimedia equipped classrooms at university level by explaining how multimedia support the students with enhanced opportunity to interact with diverse texts that give them more in-depth comprehension of the subject. It also focuses on audio-visual advantage of multimedia on the students’ English language learning. The study has followed a qualitative method to get an in-depth understanding of the impact of using multimedia in an English language classroom at tertiary level. For this purpose, the data have been collected from two different sources. Firstly, from students’ written response to  an open ended question as to their comparative experience of learning  lessons with and without multimedia facilities; and secondly, through  observation of English language classes at a private university of Dhaka, the capital city of Bangladesh. The discussion of the study is limited to  the use of multimedia in English language classroom using cartoons, images and music with a view to enhance students’ skills in academic writing, critical analysis of image and critical appreciation of music. For this purpose, cartoons in English language, images from Google and music from You Tube have got focused discussion in this paper.

The Analyses of Learning Strategies in English as a Second Language: Theoretical Classification and Measurement Test

2020 ◽  
Vol 4 (2) ◽  
pp. 118-129
Author(s):  
Asti Gumartifa ◽  
◽  
Indah Windra Dwie Agustiani
Keyword(s):  
Language Learning ◽  
Learning Outcomes ◽  
Learning Strategies ◽  
Learning Process ◽  
English Learners ◽  
English Language ◽  
Point Of View ◽  
Effective Learning ◽  
The Impact

Gaining English language learning effectively has been discussed all years long. Similarly, Learners have various troubles outcomes in the learning process. Creating a joyful and comfortable situation must be considered by learners. Thus, the implementation of effective learning strategies is certainly necessary for English learners. This descriptive study has two purposes: first, to introduce the classification and characterization of learning strategies such as; memory, cognitive, metacognitive, compensation, social, and affective strategies that are used by learners in the classroom and second, it provides some questionnaires item based on Strategy of Inventory for Language Learning (SILL) version 5.0 that can be used to examine the frequency of students’ learning strategies in the learning process. The summary of this study explains and discusses the researchers’ point of view on the impact of learning outcomes by learning strategies used. Finally, utilizing appropriate learning strategies are certainly beneficial for both teachers and learners to achieve the learning target effectively.

Case study: Prediction and field tests of railway noise and effects of a low-height noise barrier

2020 ◽  
Vol 68 (4) ◽  
pp. 303-314
Author(s):  
Yuna Park ◽  
Hyo-In Koh ◽  
University of Science and Technology, Transpo ◽  
University of Science and Technology, Transpo ◽  
University of Science and Technology, Transpo ◽  
...  
Keyword(s):  
High Speed ◽  
Field Tests ◽  
Residential Areas ◽  
Railway Systems ◽  
Railway Noise ◽  
Sound Levels ◽  
Noise Barrier ◽  
The Difference ◽  
Reduction Effect ◽  
The Impact

Railway noise is calculated to predict the impact of new or reconstructed railway tracks on nearby residential areas. The results are used to prepare adequate counter- measures, and the calculation results are directly related to the cost of the action plans. The calculated values were used to produce noise maps for each area of inter- est. The Schall 03 2012 is one of the most frequently used methods for the production of noise maps. The latest version was released in 2012 and uses various input para- meters associated with the latest rail vehicles and track systems in Germany. This version has not been sufficiently used in South Korea, and there is a lack of standard guidelines and a precise manual for Korean railway systems. Thus, it is not clear what input parameters will match specific local cases. This study investigates the modeling procedure for Korean railway systems and the differences between calcu- lated railway sound levels and measured values obtained using the Schall 03 2012 model. Depending on the location of sound receivers, the difference between the cal- culated and measured values was within approximately 4 dB for various train types. In the case of high-speed trains, the value was approximately 7 dB. A noise-reducing measure was also modeled. The noise reduction effect of a low-height noise barrier system was predicted and evaluated for operating railway sites within the frame- work of a national research project in Korea. The comparison of calculated and measured values showed differences within 2.5 dB.

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