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1

Performance of ultra reliable low latency communication (URLLC) in 5G wireless networks

Yonis Aws Zuheer

Przegląd Elektrotechniczny

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2023

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R. 99, nr 9

76--79

EN

Recently, The research paper will focus on allowing URLLC services in order to estimate electric vehicle wireless charging (EVWC) which is become the most important topic due to the many advantages that can get from it such as lack of wires which tends to reduce the risk of wires that they get damaged at any time, saving time, simple and the car battery smaller than electric vehicle charge using wire, also it is considered one of the green technology applications where it tends to reduce the pollution in the world. This technology is one of the intelligent applications like smartphones wireless charging and still grow to make it a flexible dealing to allow all electric car charging wireless. In this research paper, a type of electric car (EC) has been discussed and designed a model of wireless electric vehicles charging to get a 5 kW charger then discussed the results.

PL

Ostatnio, Artykuł badawczy skupi się na umożliwieniu usługom URLLC w celu oszacowania bezprzewodowego ładowania pojazdów elektrycznych (EVWC), co stało się najważniejszym tematem ze względu na wiele zalet, jakie można z niego uzyskać, takich jak brak przewodów, który zwykle zmniejsza ryzyko przewodów że ulegają uszkodzeniu w dowolnym momencie, oszczędzając czas, prosto i akumulator samochodowy mniejszy niż ładowanie pojazdu elektrycznego za pomocą drutu, jest również uważane za jedno z zastosowań zielonej technologii, w którym ma tendencję do zmniejszania zanieczyszczenia na świecie. Ta technologia jest jedną z inteligentnych aplikacji, takich jak bezprzewodowe ładowanie smartfonów i wciąż się rozwija, aby uczynić ją elastyczną, umożliwiającą bezprzewodowe ładowanie wszystkich samochodów elektrycznych. W tym artykule badawczym omówiono typ samochodu elektrycznego (EC) i zaprojektowano model bezprzewodowego ładowania pojazdów elektrycznych w celu uzyskania ładowarki o mocy 5 kW, a następnie omówiono wyniki.

2

Development of Renewable Energy Businesses within China’s Green Industry Framework

Korabayev Rustem, Korabayev Kazbek

Management and Production Engineering Review

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2023

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Vol. 14, No. 4

117--126

EN

The main goal of the research is to develop a set of guidelines for the development of business within the framework of the green industry, in compliance with all current environmental regulations, as applied to the realities of the current economic situation in China. The methodology basis is a combination of system analysis of the key principles of business development within the framework of environmental strategy in China with a comprehensive analysis of green industry concept as a factor limiting the activities of enterprises to avoid environmental pollution. The results obtained in the research indicate the presence of significant results in the interaction of government and business in the framework of mutually beneficial collaboration for the growth of the green industry. Chinese business structures invest in the development of “green” industrial and manufacturing technologies while ensuring the necessary level of environmental protection.

3

Ozone Method Recycling Domestic Waste to Prevent Waste Water Pollution

Munawir Abdillah, Rusdiyanto Edi, Fathar Imam Rozali, Nurhasanah, Mierzwa Jose Carlos

Journal of Ecological Engineering

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2023

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Vol. 24, nr 12

16--28

EN

This study aims analyze the physical-chemical quality of domestic wastewater in hotel areas and analyze the biological quality of domestic wastewater which includes total coliform bacteria in hotel areas. The research data was obtained by conducting observation and laboratory analysis with the assessment of several standardized thresholds for environmental quality standards Regulation No. P.68 of 2016 and PP No. 22 of 2021. The results of the total coliform parameter after the application of ozonation, the results are obtained with a value of 2900 Most Probable Number/100 milliliters which is still below the maximum allowable threshold value; total suspended solid parameter test, obtained results with a value of 5 miligram/liter or under limit 30–400 miligram/liter which is the maximum allowable value limit. The oil/fat parameter obtained a value of <2 miligram/liter while the quality standard value was 5 miligram/liter; the ammonia parameter yielded 0.58 miligram/liter, while the maximum allowable limit was 10 miligram/liter; the biochemical oxygen demand parameter yielded <2 miligram/liter, while the maximum allowable limit was 12–30 miligram/liter; the chemical oxygen demand parameter yielded <4 miligram/liter, and the maximum allowed limit was 80–100 miligram/liter. The use of ozone can be an option in the process of recycling domestic wastewater in a sustainable manner proven to reduce levels of waste, viruses and its main pathogens total suspended solid, Ammonia, chemical oxygen demand, biochemical oxygen demand, Oil and Grease, as well as total coliform biological bacteria so that it can be reused by the community.

4

Exploring the Phytoremediation Capability of Athyrium filix-femina, Ludwigia peruviana and Sphagneticola trilobata for Heavy Metal Contamination

Aveiga Ana, Banchón Carlos, Sabando Roxanna, Delgado María

Journal of Ecological Engineering

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2023

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Vol. 24, nr 7

165--174

EN

Heavy metals are one of the leading environmental pollutants that are hazardous to the health of humans, soils, plants, and aquatic life. This study investigated the potential of Athyrium filix-femina, Ludwigia peruviana, and Sphagneticola trilobata for phytoextraction of Al, Ag, Cd, Cr, Ga, and Sr. To evaluate the heavy metal uptake by the plants, a pot experiment was conducted using uncontaminated soil mixed with a heavy metal solution. At the end of thirty days of planting, the bioconcentration and translocation factors were calculated. Cd accumulated to a greater degree in the shoots of A. filix-femina and L. peruviana than in their roots (8% and 12% respectively). Conversely, S. trilobata accumulated 27% more Cd in its roots than in its shoots. In all three plant species, roots had significantly higher heavy metal concentrations than shoots. These findings demonstrate that L. peruviana, A. filix-femina, and S. trilobata have high potential for phytoextraction and bioaccumulation of Cd, Sr, Ag, and Ga. The herbaceous nature of these plants, coupled with their deep roots and rapid growth rates, make them promising candidates for phytoremediation in heavy metal-contaminated soils.

5

Exploration on sustainable new infrastructure green development pattern: coupling coordination measurement and evaluation of China’s new infrastructure investment intensity and green technology innovation

Yang Simin, Zhu Kunjie

Archives of Environmental Protection

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2023

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Vol. 49, no 3

3--15

EN

In the context of China’s new infrastructure construction developing rapidly, this paper explores the sustainable new infrastructure green development pattern. We establish qualitative and quantitative indicators for green technology innovation (GTI) at both the societal macro level and enterprise micro level, capturing the multidimensional nature of China’s green innovation dynamic. Additionally, we create an indicator system for China’s new infrastructure investment intensity (NTI) across three areas: information infrastructure, integration infrastructure, and innovation infra-structure. Using provincial panel data from 2010 to 2020, we construct a coupling coordination degree model (CCDM) to examine the level of coordination between NTI and GTI. Our findings reveal that: the degree of coordination between NTI and GTI follows a U-shaped curve, with both subsystems remaining far from highly coordinated during rapid development; the coupling level of NTI and GTI in China is currently at a near dissonance level overall; the degree of coupling and coordination between NTI and GTI is mainly influenced by policies, and the coupling level is higher on the enterprise side than on the societal side; the two parameters (α-NTI and β-GTI) widely used in prior studies have less of an effect on the coordinated coupling system than other factors considered herein.

6

Strategia wodorowa Polski i Unii Europejskiej w czasie kryzysu energetycznego

Cygańczuk Krzysztof, Roman Łukasz

Przemysł Chemiczny

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2022

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T. 101, nr 11

903--911

7

Bank filtration for climate resilience: potentiality of a new site along the Ismailia Canal in Egypt

Ghodeif Kamal, Wahaab Rifaat A., Grischek Thomas, Afifi Hana, Wahsh Neveen

Geologos

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2022

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Vol. 28, No. 1

51--60

EN

Bank filtration (BF) is a nature-based solution that can provide safe drinking water at a low cost, in being a green technology that benefits from natural ecosystem services and saves energy as well. The objective of the present paper is to evaluate the potentiality of a new site for bank filtration along a surface water source that experiences periods of both high and low flow. This site is located along the Ismailia Canal in the eastern Nile Delta fringe of Egypt. The present evaluation is based on exploratory drilling, installation of monitoring infrastructure and monitoring of both water level and water quality parameters for one year. The site has favourable hydrogeological conditions; the mean hydraulic conductivity of aquifer materials (sand and gravel) is 18.98 m/day. Moreover, there is a hydraulic connection between canal and aquifer; under steady conditions, the canal feeds the aquifer. Using different tracers, such as Cl, EC, Sr and SO4, the average bank filtration share is in excess of 95%. BF has reduced the particulates (turbidity) by 96%, total coliform by 99 % and total organic carbon (TOC) expressed as ultra-violet absorbance at 254 wavelengths (UVA254) by 44%. In addition, BF reduces concentrations of disinfection by-products due to its ability to remove organic matter. The potential degradation of TOC in the canal bed sediments may cause the release of iron (Fe) and manganese (Mn) to the bank filtrate water; this process is exaggerated during low-flow periods. Compared to conventional water treatment, BF is a cost-effective green technology, because no chemicals are used and no waste products are generated.

8

Life Cycle Assessment (LCA) and environmental comparison the selected construction methods of residential buildings in traditional and straw cubes technology - a case study

Fąfara Marta, Łukaszewski Łukasz, Owczarek Eliza, Źrebiec Izabela

Archives of Civil Engineering

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2022

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Vol. 68, nr 3

241--255

EN

Popular, traditional building materials typically exhibit a high energy intensity and a detrimental effect on the environment. Only a negligible part of them are recovered and recycled, re-used in the building trade or other branches of industry. However, the technology of building detached houses based on ceramic blocks is still most often favored by investors due to its price and high availability (in terms of materials and workmanship). The research indicates that 25-30% of CO2 emissions generated by buildings originate from materials and their manufacturing process. In contrast, 70-75% can be attributed to the use of buildings over a longer period of time. As a result, the importance of alternative materials with minimal environmental impacts is growing year by year. Eco-friendly housing, using natural products, pollutes the environment less significantly compared to conventional construction. Its key element is the use of materials characterized by the lowest possible degree of processing, and thus by the lowest possible embodied energy. A type of material that perfectly fits into the above assumptions is straw bale. The purpose of the article focus on, four variants of a construction of detached house have been compared by means of the LCA method. Variant I - the reference one, presents the technology utilizing ceramic hollow bricks, variants II, III and IV are eco-friendly technologies employing wood and straw. The study presents the amount of energy required for construction and carbon footprint that remains in the environment following the construction of the buildings.

PL

Popularne, konwencjonalne materiały budowlane zwykle charakteryzują się wysoką energochłonnością i szkodliwym oddziaływaniem na środowisko. Tylko niewielka ich część poddawana jest procesom odzysku i recyklingu, do ponownego użycia w budownictwie czy też innych gałęziach przemysłu. Technologia budowania domów jednorodzinnych z bloczków ceramicznych jest jednak wciąż najczęściej wybierana przez inwestorów z uwagi na cenę i dużą dostępność (materiałową i wykonawczą). Badania wskazują, ze 25-30% emisji CO2 generowanej przez budynki pochodzi z materiałów oraz procesu ich produkcji. Natomiast 70-75% odpowiedzialne jest użytkowanie budynków w dłuższym okresie czasu. W rezultacie znaczenie alternatywnych materiałów o minimalnym wpływie na środowisko naturalne jest z roku na rok coraz większe. Budownictwo ekologiczne, używając produktów naturalnych, znacznie mniej zanieczyszcza otoczenie naturalne niż budownictwo konwencjonalne. Kluczowym jego elementem jest stosowanie materiałów o jak najmniejszym stopniu przetworzenia, a co za tym idzie o jak najmniejszej energii wbudowanej. Materiałem, który doskonale wpisuje się w powyższe założenia są kostki słomy, tzw. straw bale, które na przestrzeni ostatnich lat są coraz chętniej używane w budownictwie ekologicznym. W artykule, za pomocą metody LCA porównano cztery warianty budowy domu jednorodzinnego. Wariant I - referencyjny, przedstawia technologie z wykorzystaniem pustaka ceramicznego, wariant II, III i IV to technologie ekologiczne z wykorzystaniem drewna i słomy. W badaniach przedstawiono ilość energii potrzebnej do wybudowania i ślad węglowy jaki pozostaje w środowisku po wybudowaniu obiektów. Porównano także ich parametry ekonomiczne takie jak rzeczywiste koszty materiałów i wykonawstwa. Wyniki badań są źródłem wiedzy w temacie projektowania ekologicznego z wykorzystaniem słomy. Pokazują i zachęcają do wykorzystania zrównoważonego projektowania w architekturze domów jednorodzinnych.

9

China’s Environmental Protection in the New Era from the Perspective of Eco-civilization Construction

Huan Qingzhi

Problemy Ekorozwoju

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2020

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Vol. 15, nr 1

7--14

EN

Under a particular context of China’ eco-civilization construction in the New Era after the 18th national congress of CPC, an interesting question is that the discourse of socialist eco-civilization and its practice can to what an extent reshape or change the relationship among eco-capital, green technology and public participation in achieving a better environmental governance. A field-study in Fuzhou City, Jiangxi Province, shows clearly that there are both great hope for a radical reconstruction and multitudinous difficulties and challenges in front of the pioneering Green enterprises and the pilot areas of eco-civilization construction.

PL

W szczególnym momencie budowy eko-cywilizacji Chin w Nowej Erze po 18. kongresie narodowym KPCh interesującym jest, że koncepcja socjalistycznej eko-cywilizacji w praktyce może do pewnego stopnia przekształcić lub wręcz zmienić relacje pomiędzy eko-kapitałem, zieloną technologią i udziałem społeczeństwa w celu osiągnięcia lepszego zarządzania środowiskiem. Badanie przeprowadzone w mieście Fuzhou, w prowincji Jiangxi, wykazały, że wśród mieszkańców istnieje wielka nadzieja na radykalną przebudowę, zarazem jednak występuje mnogość trudności i wyzwań stojących przed pionierskimi zielonymi przedsiębiorstwami i pilotażowymi obszarami budowy eko-cywilizacji.

10

Design of a Reed Bed System for Treatment of Domestic Wastewater using Native Plants

Al-Ajalin Fayeq Abdel Hafez, Idris Mushrifah, Abdullah Siti Rozaimah Sheikh, Kurniawan Setyo Budi, Imron Muhammad Fauzul

Journal of Ecological Engineering

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2020

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Vol. 21, nr 6

22--28

EN

The reed bed system is one types of phytoremediation technology for removing pollutants from the environment. This technology provides an environmentally friendly approach to treating contamination with competitive cost, compared to the physico-chemical treatment. The design of reed bed system is highly important in order to achieve the highest pollutant removal efficiency. The design of reed bed system affects the natural oxygen transfer from the environment. The reed bed system was proven to have a good efficiency in removing Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Suspended Solid (TSS), Total Dissolve Solid (TDS), Total Nitrogen (TN) and a number of bacteria. In addition to the oxygen transfer from the environment, the interaction among pollutant-plants-medium-microbes also plays a vital role in the removal of pollutant using the reed bed system. It was suggested that the future related research should accommodate the importance of several environmental conditions to the interaction between pollutant, plants, medium and microbes as well as the impact of those interactions on the pollutant removal efficiency.

11

Selected Problems of the Environmental Impact Analysis of Investment Projects Based on Life Cycle Assessment Procedure

Szafranko Elżbieta

Journal of Ecological Engineering

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2019

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Vol. 20, nr 9

87--94

EN

The building objects show a wide variety. Among them, we can distinguish buildings and various building constructions. In addition to the fact that they are of various sizes, they perform different functions, while their purpose and use generates various problems, they can be made using various materials, different technologies and construction solutions. Therefore, the decision on which solutions to apply may be difficult to make. In this situation, it is good to develop several alternative solutions for their comprehensive comparison. In addition, the existing regulations that originate in the EU directives, in many cases impose the obligation to develop several variants of future investments and analyze them taking into account many factors. In the EU recommendations, the analysis related to the impact of construction investments on the environment is of highest importance. The ISO 14040–1404X regulations created and introduced by the European Union are the most important tool for a global assessment of the environmental impact of a product, facility and service. They relate to the environmental impact assessment of the entire Life Cycle Assessment (LCA), and their assumption is to identify and minimize any environmental impacts that may arise from the production, use and disposal of the product. Research should include specific stages according to the LCA evaluation system: determination of the purpose and scope of the assessment, inventory of input and output data and the impact assessment. The following research methods were used: source materials analysis, library query, advanced data collection methods through online surveys, LCA assessment, multicriterial methods. The research conducted by the author showed that the analysis involving selected problems related to the object-environment interaction is dominant. However, in practice it is difficult to find the analyses covering the entire lifecycle of an object in accordance with the LCA procedure and examples of comparison of specific design solutions within the variant assessment procedure taking into account the LCA procedure. The aim of the article is to show how such procedure can look while comparing the exemplary variants of a construction project. The article presents an example and diagrams of conduct covering the whole life cycle of an object, and the analysis is based on specific examples.

12

Sustainability assessment of designed family house alternatives with aplication of green technologies

Vilčeková S., Krídlová Burdová E., Moňoková A.

Czasopismo Inżynierii Lądowej, Środowiska i Architektury / Journal of Civil Engineering, Environment and Architecture

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2018

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z. 65, nr 4

57--68

EN

The paper aimed at an assessment of environmental and energy impacts of designed family house using green technologies. Investigated buildings are located in Kosice region. The analysis investigates the role of applied green technologies in proposed variants of family house from embodied energy and equivalent emissions of CO2 and SO2 by using LCA assessment method within “cradle to gate” boundaries. The main contribution of the study is underlining that green technologies have significant part in the reduction of the environmental and energy impacts.

13

Określanie czynników oceny inwestycji budowlanej w ramach procedury LCA

Szafranko E.

Materiały Budowlane

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2017

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nr 10

64--66

PL

Jednym z ostatnich trendów rozwoju technologii w inżynierii lądowej jest „green technology” – rozwiązania mające na celu skuteczne zarządzanie energią i surowcami naturalnymi, począwszy od produkcji materiałów, przez rozwiązania projektowe i wykonawcze, okres eksploatacji, po recykling materiału rozbiórkowego. Istnieje wiele metod oceny budynków pod kątem rozwiązań przyjaznych dla środowiska. Jedną z proponowanych przez Dyrektywy Unijne oraz normy serii ISO jest ocena oddziaływania na środowisko w całym cyklu życia obiektu budowlanego (LCA). W artykule przedstawiono przykładowe czynniki oceny obiektu w całym cyklu życia z propozycją wykorzystania ich jako danych do analizy wielokryterialnej oceny oddziaływania na środowisko.

EN

One of the most recent trends in the technological development of civil engineering is „green technology”. In the construction industry, it primarily means solutions with an aim of attaining efficient management of energy and natural resources, from production of building materials, through design and construction solutions, a period of exploitation, to the recycling of demolition materials. There are many methods for evaluation of buildings in the context of eco-friendly solutions. A method which has been recommended in the EU Directives and ISO standards it an assessment of the impact on the natural environment over the entire life cycle of a building (LCA). This article presents examples of factors involved in an evaluation of a building in its whole life cycle, together with the suggestion of using such factors and input data for a multi-criteria analysis of an assessment of a building’s impact on the environment.

14

Implementation of green technologies and innovations in Košice Region, Slovakia

Zeleňáková M., Vilčeková S., Zvijáková L.

Czasopismo Inżynierii Lądowej, Środowiska i Architektury / Journal of Civil Engineering, Environment and Architecture

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2016

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z. 63, nr 2/II

495--504

EN

Almost each country has potential for ensuring the sustainability of its economy if it avails itself of the opportunities offered by a nationally customized green economy strategy. To move towards a green economy, it will, however, have to introduce innovative technologies, techniques and processes. In particular, it will have to modernize its obsolete production and transport infra-structures and construction and cultivation methods. Green technologies can also contribute to the green economy because they have the potential to create new business opportunities, markets and jobs. This paper i) reviews the main environmental challenges and opportunities for the greening of the Košice region economy; ii) assesses the country’s innovation policies and the challenges and opportunities for the introduction of green technologies; iii) provide policy recommendations on adopting and applying innovative green technologies more efficiently. The strategy for adopting and applying innovative green technologies, also in Košice region, should carefully consider the current status of policy measures, challenges and opportunities which the country faces. Success depends not only on the improvement of each individual sector in region, but also on how these separate elements interact. Therefore, a wide range of consultations and interactions with stakeholders, such as the government authorities, business community, civil society, academics, researchers, scientists, financial institutions, etc., are essential to facilitate this interaction.

15

Sustainability and growth - study in environmental pistemology

Bołtuć P.

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

|

2015

|

z. 84

27--48

EN

Sustainable development is sometimes taken to mean stagnation and even civilizational regress. This is based on the philosophy that treats the Earth as an overcrowded lifeboat, which originated with P. Ehrlich. This approach is based on two theses: A general thesis, that the Earth has some limits to its carrying capacity, and an empirical thesis, that the Earth is about to reach the limits of carrying capacity. The general thesis is true, in general terms. To support the empirical thesis Ehrlich and the Club of Rome presented a testable hypothesis (shortages of natural resources and food). Those predictions failed to materialize. Currently, the empirical thesis is supported largely by intuitions. The view of the Earth as overcrowded leads to pessimistic and anti-humanist approaches. A better vision, proposed by Elon Musk and recent environmental epistemology, shows that civilizational development gives us a better chance to solve the real environmental challenges.

PL

Zrównoważony rozwój niekiedy traktowany jest nie jako rozwój, ale stagnacja lub regres cywilizacyjny. Podejście takie, które zapoczątkował P. Ehrlich opiera się na filozofii traktującej Ziemię jako przeładowaną tratwę ratunkową oraz na dwóch tezach: Teza ogólna, iż Ziemia ma maksymalną zdolność uniesienia pewnej ilości ludzi, oraz teza empiryczna, iż Ziemia niedługo osiągnie taką granicę. Teza ogólna jest w generalnym sensie prawdziwa. Na poparcie tezy empirycznej Ehrlich i Klub Rzymski przedstawili testowalne hipotezy (przewidywano kryzys surowcowy i żywnościowy), które nie sprawdziły się. Obecnie teza empiryczna jest wspierana jedynie za pomocą zachowawczych intuicji. Podejście do Ziemi jako przeludnionej ma pesymistyczne i antyhumanistyczne konsekwencje. Lepszą wizję proponuje Elon Musk i nowoczesna epistemologia środowiska naturalnego, która pokazuje, że rozwój cywilizacyjno-technologiczny daje najlepszą szansę rozwiązania problemów środowiska naturalnego.

16

Fundusze zewnętrzne a zielone technologie

Gola-Sienkiewicz R.

Recykling

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2014

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nr 5

28--30

PL

Zielona technologia to połączenie nauki i praktyki, które jest przyjazne środowisku oraz służy zachowaniu naturalnych zasobów, a także ograniczeniu negatywnych skutków działalności człowieka.Pojęcie tzw. zielonych technologii funkcjonuje dość krótko. W ciągu kilkudziesięciu ostatnich lat ewoluowało zarówno praktyczne, jak i teoretyczne znaczenie tego określenia. Bardzo dużą rolę w rozwoju zielonych technologii odgrywa działalność Organizacji ds. Współpracy Gospodarczej i Rozwoju (OECD). Przyjęta w czerwcu 2009 r. deklaracja OECD odnośnie zielonego wzrostu (ang. green growth) jako główne wyzwanie najbliższych lat wskazuje wyjście z kryzysu oraz konieczność zapewnienia zrównoważonego rozwoju pod względem ekologicznym i społecznym, akcentując, że pojęcia „wzrost” i „zielony” nie tylko nie wykluczają się, ale powinny się uzupełniać. W dokumencie podkreślono także potrzebę podejmowania działań na rzecz zielonych inwestycji oraz racjonalnego korzystania z zasobów naturalnych, w szczególności inwestowania w infrastrukturę i nowe technologie, które będą kluczowymi elementami niskowęglowego wzrostu gospodarczego.

17

Greening the future of transport by using a regenerative variable geometry gas turbine engine

Najjar Y. S. H., Dalgamoni H. N.

Journal of Power Technologies

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2014

|

Vol. 94, nr 4

259--269

EN

Gas turbine engines are cleaner, have multi-fuel capability, and a lower volume to power ratio than piston engines. A main disadvantage of gas turbine engines in automotive use is their poor part-load efficiency. As transport engines spend most of their operating life at part-load; a gas turbine engine that achieves a wide range of high-efficiency should be used. This paper aims to develop a computer model to simulate the performance of regenerative gas turbine engines for transport use. A computer program for the performance prediction was designed based on the characteristics of each component in the engine and the compatibility between them. The influence of a variable power turbine setting-angle on engine performance was investigated. Compressor and turbines maps were used in a particular form; hence, each point on the map has a specific value of rotational speed, pressure ratio, mass flow rate, and efficiency. Variation in effectiveness of the regenerator was considered. Variable pressure drop and mass flow rate across the combustion chamber and the regenerator were included.

18

Green Roofs - Landscaped roofs in their most attractive form

Pfaus M.

Zeszyty Naukowe. Inżynieria Środowiska / Politechnika Opolska

|

2003

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Vol. 291, z. 4

543-547