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Uneven distribution of PM2.5 and residential area planning ZhengWang Wu1, a, Xin Ma1, b and Xin Yang1, c 1School of Civil Engineering and Architecture, North China University of Technology, 100144, Beijing, China awuzhengwang@126.com,bmaxin@ncut.edu.cn,c tammy19830331@163.com Keywords: PM2.5, uneven distribution, residential areas, landscape pattern, the optimization Abstract.

Experimental Determination of the Coefficient of Thermal Expansion of Hardened Alkali-Activated Slag Pastes Petr Nápravník1,a*, Dominik Lisztwan1,b, Petr Daněk1,c and Barbara Kucharczyková1,d 1Brno University of Technology, Faculty of Civil Engineering, Institute of Building Testing, Veveri 331/95, 602 00 Brno, Czech Republic aPetr.Napravnik1@vutbr.cz, bdominik.lisztwan@vutbr.cz, cdanek.p@fce.vutbr.cz, dbarbara.kucharczykova@vutbr.cz Keywords: coefficient of thermal expansion, alkali-activated slag, paste, liquid sodium silicate, sodium carbonate, sodium hydroxide Abstract.

Flotation Research on Dolomite-containing Magnesite Ore Wanzhong YIN a, Qiang LI b, Yingqiang MA c College of Resources and Civil Engineering, Northeastern University, Shenyang, China, 110004 a. yinwanzhong@mail.neu.edn.cn b. danyliqiang168@163.com， c. myq90426@126.com Keywords: magnesite, flotation, chemical bonds calculation, batch flotation ABSTRACT.

Engineering prototypes of GaN Schottky diodes are already available, although the processing of such diodes is much more complex as compared to that of SiC based diodes.
Still, long term reliability has to be established and the linearity obtained so far in amplifiers does not open large opportunities in civil markets such as cellular phone base station amplifiers.

Stabilized Dune Sand for Road Foundation Layers - Case of the Dune Sand of the Region of Djelfa (Algeria) Ghrieb Abderrahmane 1, a, Mitiche-Kettab Ratiba 2,b 1 Civil Engineering Department, University of Djelfa, 17000 Djelfa, Algeria 2 Laboratory of Construction and Environment, Polytechnic National school of Algiers,16000 Algiers, Algeria a ghrieb75@Gmail.com, b Mitiche_rdz@yahoo.fr Keywords: dune sand; stabilization; mechanical performances; valorisation; classification; road material.

A study on the technique for fire smoke control in urban traffic link tunnel * Jie Zhu 1 2, Jianbo Wu 1, Zhigang Zhang 1, Xiaoju Li 1 (1.Research Institute of Fire Engineering, Sichuan Normal University, Chengdu, 610101, China TEL：13880618382 email:zhujie0805@163.com) 2.
The current study was based on the fire plume model, and smoke production was calculated according to NFPA 92B of the USA and the Technical Specifications for Smoke Control in Civil Buildings of Shanghai, China.

Experimental Investigations of Removal of Phosphorus Compounds from Wastewater under Biological Purification TSYTLISHVILI Kateryna1,а 1National University of Civil Defence of Ukraine, 94 Chernishevska str., Kharkiv 61023, Ukraine аsoroka.soroka2@gmail.com (tsytlishvili@nuczu.edu.ua) Keywords: wastewater purification, phosphorus, immobilized microflora, aerobic conditions, anaerobic conditions, anoxic conditions, biological method.
Ecological Engineering and Environmental Technology, 22 (2) (2021) 59-66

Comparative Evaluation of Daylighting Simulation Programs Lenka Gábrová1, a *, Michaela Hlásková1,b and František Vajkay1,c 1Brno University of Technology, Faculty of Civil Engineering, Institute of Building Structures, Veveří 331/95, 602 00 Brno, Czech Republic agabrova.l@fce.vutbr.cz, bhlaskova.m@fce.vutbr.cz, cvajkay.f@fce.vutbr.cz Keywords: Daylighting, daylighting simulations, CIE test cases, ray-tracing, radiosity.

The Need for Affordable Urban Settlement in Tebet - Jakarta Indonesia: Challenge and Opportunity Budi Arlius Putra1,a 1 Department of Architecture and Architectural Engineering, Seoul National University, Korea a budi_arliusputra@yahoo.co.id Keywords: Affordable housing, Settlement, Jakarta, Personal space Abstract.
Nation flats are the state owned flats serve residence or dwelling for supporting the implementation of official duties and civil servants.

., Department of Civil Engineering, University of Malaya,, Malaysia.