scholarly journals APPROACH TO REFURBISHMENT OF TIMBER PRESCHOOL BUILDINGS WITH A VIEW ON ENERGY AND ECONOMIC EFFICIENCY

2019 ◽  
Vol 25 (1) ◽  
pp. 27-40 ◽  
Author(s):  
Nataša Šuman ◽  
Maja Žigart ◽  
Miroslav Premrov ◽  
Vesna Žegarac Leskovar
Keyword(s):  
Economic Efficiency ◽  
Energy Savings ◽  
Main Idea ◽  
Energy Demands ◽  
Functional Quality ◽  
Low Efficiency ◽  
Almost All ◽  
The City

The refurbishment of educational buildings usually involves a variety of measures aiming at reducing energy demands and improving building functionality to achieve higher living comfort. This paper aims to develop an approach for determination of comprehensive refurbishment strategy upon existing preschool buildings in Slovenia from the aspects of energy and economic efficiency. The main idea of the approach is to separate and individually analyse the investments into those related to energy efficiency improvements and those related to improvements of building functional quality through the step-by-step evaluation of individual measures. The proposed approach was applied on the case study of the existing timber preschool building in the city of Maribor. Generally, the highest energy savings are detected only in the case of combination of multiple renovation measures. Moreover, the economic indicators show low efficiency for almost all measures if they are treated separately. Additionally, the analysis reveals that certain measures are totally inefficient in terms of energy, yet they are highly beneficial from the viewpoint of building functional quality, which indicates the importance of the multi-perspective assessment of renovation process. The conclusions of this study can be implemented to similar building types and construction ages in similar climatic and economic environments.

scholarly journals Farmers’ Perspective on Sociological and Environmental Issues of Urban and Peri-Urban Agriculture: A Case Study from Western and Southern Regions of Sierra Leone

2017 ◽  
Vol 9 (7) ◽  
pp. 186
Author(s):  
Osman Nabay ◽  
Abdul R. Conteh ◽  
Alusaine E. Samura ◽  
Emmanuel S. Hinckley ◽  
Mohamed S. Kamara
Keyword(s):  
Sierra Leone ◽  
Urban Agriculture ◽  
Environmental Aspect ◽  
Financial Organization ◽  
The Social ◽  
Alternative Means ◽  
Household Assets ◽  
Almost All ◽  
The City

The paper examined and brought to the fore the typical characteristic of urban and peri-urban farmers in Freetown and Bo communities which serves as major source of supply of agricultural products into the cities’ markets. The social and environmental aspect and perception of producers involved in urban and peri-urban agriculture was examined. Descriptive statistics and pictograms were used to analyze and present the data. Results indicate that 56.34% never went to formal school and mostly dominated by women, showing that farming became the alternative means of livelihood support for those groups. Crops grown are purely influenced by market orientation—demand and cost, as is evident in Gloucester (lettuce, cabbage and spring onions). Potato leaves were commonly grown in almost all communities, reason being that it serves as common/major sauce/vegetable cooked in every household in Sierra Leone. Maize and rice were featured in Ogoo farm—government supervised land set aside purposely for growing crops to supply the city. Findings also revealed that majority of the farmers are resource poor, judging from calculation about their monthly income earning and available household assets and amenities. About 70.4% of the lands the farmers grow their crops on is leased for production. Except for Gloucester community, when costs of production will be summed, minimal benefit seem to be realized from the farming activities. Even though some of these farmers are engaged in organization, many have limited access to micro financial organization that would probably loan them money to upscale production.

scholarly journals A Critical View on Pension Savings in Slovakia

2021 ◽  
Vol 101 (4) ◽  
pp. 370-382
Author(s):  
Jana Špirková ◽  
Martin Dobrovič ◽  
Miroslava Vinczeová
Keyword(s):  
Pension System ◽  
Investment Fund ◽  
Monthly Basis ◽  
Critical View ◽  
Pension Systems ◽  
Administrative Costs ◽  
The World ◽  
Almost All

In almost all countries around the world, pension systems are based on several pillars. This is also the case of Slovakia with its three-pillar pension system. The paper presents a case study underlying the risks that can seriously affect the amount of future pensions. The case study clearly indicates that current pensions in Slovakia paid under all three pillars do not correspond with the expectations from the implementation of the three-pillar pension system. The aim of the paper is to the risks that can seriously affect the amount of future pensions. Our own contribution is the determination of the amount of pension for a specific pensioner specified in the presented case study. Within the saving phase of pension contributions the development of investment fund returns, the amount of future pensioner´s contributions, as well as administrative costs are analyzed on a monthly basis. The payout phase is modelled using actuarial functions applying the mortality tables of Slovakia.

An Integrated DEA Model Allowing Decomposition of Eco-Efficiency: A Case Study of China

2017 ◽  
Vol 5 (5) ◽  
pp. 473-488 ◽  
Author(s):  
Wanbin Pan ◽  
Lei Huang ◽  
Linlin Zhao
Keyword(s):  
Economic Efficiency ◽  
Economic Benefits ◽  
Environmental Efficiency ◽  
Decision Makers ◽  
Pollutant Emissions ◽  
Data Envelopment ◽  
Dea Model ◽  
Almost All ◽  
Economic Efficiencies

Abstract A common feature of previous studies about the application of data envelopment analysis (DEA) to determine environmental and economic efficiencies is that the two were analyzed in separate models or frameworks. The purpose of this paper is to analyze the economic efficiency and environmental efficiency with a single model. This paper proposes an integrated DEA model, based on a modification of the directional distance function, which allows us to decompose the eco-efficiency (EE) into the economic efficiency (ECE) and environmental efficiency (ENE). The ECE characterizes the ability of gaining economic benefits while the ENE characterizes the ability to control pollutant emissions in production activities. Identification of ECE and ENE can help decision makers of different regions detect what kind of factor (economic inefficiency or environmental inefficiency) is the main source of eco-inefficiency. This can help decision makers more targeted to improve EE. To illustrate the feasibility of our approach, a case study of 30 regions in China is presented. The empirical results show that almost all regions have very high economic efficiencies. The environmental inefficiency is the main source of eco-inefficiency. The differences of environmental efficiencies lead to the differences of eco-efficiencies in the east, central and west areas, while the economic efficiencies do not have significant differences among these areas. The economic efficiencies showed an opposite “V” shape and the environmental efficiencies showed a decreasing trend during the period 2010–2014.

scholarly journals Joint Analysis of Cost and Energy Savings for Preliminary Design Alternative Assessment

2020 ◽  
Vol 12 (18) ◽  
pp. 7507
Author(s):  
Carlo Iapige De Gaetani ◽  
Andrea Macchi ◽  
Pasquale Perri
Keyword(s):  
Energy Demand ◽  
Alternative Assessment ◽  
Energy Savings ◽  
Life Cycles ◽  
Decision Makers ◽  
Joint Analysis ◽  
Energy Demands ◽  
Design Alternatives ◽  
The Impact

The building sector plays a central role in addressing the problem of global energy consumption. Therefore, effective design measures need to be taken to ensure efficient usage and management of new structures. The challenging task for designers is to reduce energy demands while maintaining a high-quality indoor environment and low costs of construction and operations. This study proposes a methodological framework that enables decision-makers to resolve conflicts between energy demand and life cycle costs. A case study is analyzed to validate the proposed method, adopting different solutions for walls, roofs, floors, windows, window-to-wall ratios and geographical locations. Models are created on the basis of all the possible combinations between these elements, enriched by their thermal properties and construction/management costs. After the alternative models are defined, energy analyses are carried out for an estimation of consumption. By calculating the total cost of each model as the sum of construction, energy and maintenance costs, a joint analysis is carried out for variable life cycles. The obtained results from the proposed method confirm the importance of a preliminary assessment from both energy and cost points of view, and demonstrate the impact of considering different building life cycles on the choice of design alternatives.

scholarly journals Implementation of Certified Energy ManagementSystem in Municipality. Case Study

2020 ◽  
Vol 24 (2) ◽  
pp. 41-56
Author(s):  
Anda Jekabsone ◽  
Agris Kamenders ◽  
Marika Rosa
Keyword(s):  
Energy Management ◽  
Public Transportation ◽  
Energy Savings ◽  
Implementation Process ◽  
Energy Management System ◽  
The European Union ◽  
The Public ◽  
Regulatory Pressure ◽  
The City

AbstractThe European Union has taken the course to become climate neutral by 2050. To reach that target significant changes in all sectors are necessary, resulting in increasing regulatory pressure on energy producers, consumers and other sectors. Increasing legal requirements was also one of the reasons why the city of Daugavpils (population of 82 000) took a decision to implement an Energy management system (EnMS). In the boundaries of EnMS Daugavpils included more than 100 public buildings, public transportation and public lighting. This research paper presents results of the EnMS implementation, main drivers and barriers that Daugavpils has faced and overcome in the implementation process, and also assesses the benefits the city of Daugavpils has gained from EnMS. The success rate of EnMS in such an organisation as a municipality is based on the awareness and knowledge of the municipality’s employees and support from the municipality leaders. The case study of Daugavpils shows energy savings of 12 % in the public building sector after implementing EnMS.

scholarly journals A Novel Application Based on a Heuristic Approach for Planning Itineraries of One-Day Tourist

2021 ◽  
Vol 11 (19) ◽  
pp. 8989
Author(s):  
Agostino Marcello Mangini ◽  
Michele Roccotelli ◽  
Alessandro Rinaldi
Keyword(s):  
User Interaction ◽  
Technological Innovations ◽  
Optimization Approach ◽  
Information And Communications Technologies ◽  
New Approach ◽  
Communications Technologies ◽  
Intelligent Cities ◽  
The City

Technological innovations have revolutionized the lifestyle of the society and led to the development of advanced and intelligent cities. Smart city has recently become synonymous of a city characterized by an intelligent and extensive use of Information and Communications Technologies (ICTs) in order to allow efficient use of information. In this context, this paper proposes a new approach to optimize the planning of itineraries for one-day tourist. More in detail, an optimization approach based on Graph theory and multi-algorithms is provided to determine the optimal tourist itinerary. The aim is to minimize the travel times taking into account the tourist preferences. An Integer Linear Programming (ILP) problem is introduced to find the optimal outward and return paths of the touristic itinerary and a multi-algorithms strategy is used to maximize the number of attractions (PoIs) to be visited in the paths. Finally, a case study focusing on cruise tourist in the city of Bari, demonstrates the efficiency of the approach and the user interaction in the determination of the itinerary.

scholarly journals URBAN’S RIVER FLOOD ANALYSING USING SENTINEL-1 DATA CASE STUDY: (GORGANROOD, AQ’QALA)

2019 ◽  
Vol XLII-4/W18 ◽  
pp. 415-419
Author(s):  
K. Ganji ◽  
S. Gharachelou ◽  
A. Ahmadi
Keyword(s):  
Agricultural Products ◽  
Synthetic Aperture ◽  
Flood Mapping ◽  
Sar Images ◽  
River Flood ◽  
Northern Regions ◽  
Almost All ◽  
The City ◽  
Flooded Areas

Abstract. Flood is one of the greatest disasters in the world, and the cause of a lot of damages to buildings and Agricultural products every year. Gorganrood river crossing the city of Aq’qala and it is always under flood risk. In the spring, due to the high intensity rainfall and melting of the snow, upstream areas bring much water into the Gorganrood river. On 23rd March, 2019 occurred a terrible flood in Aq’qala passing discharge 650 (m^3/s), it would occur every 100 years in this river. This river in normal time is passing discharge approximately 120 (m^3/s). A large of an urban and non-urban area was affected by this flood and mapping and analyzing of this flood have a key role for river and disaster management. Remote sensing is one of the best ways to flood mapping, especially in flood time weather is cloudy, Therefore, Synthetic Aperture Radar (SAR) images had high potentiality for flood analysis. In this study the Sentinel-1 data used for flood studying due to free available and shorter revisit time. After the processing has done, by selecting the VV band the flooded areas detected. After that overlapped the images and combination of RGB bands and the change the value of pixels, at last, we will be able to obtain the flood mapping images for Gorganrood river. In the primary days of the flooding, almost all the northern regions of the city were flooded, and during a week about 96.8 (km^2) city flooded.

Brigdeheader Space for Dwell in Jakarta

2015 ◽  
Vol 747 ◽  
pp. 136-140
Author(s):  
Deni ◽  
Salwin
Keyword(s):  
Low Income ◽  
Low Cost ◽  
Practical Observation ◽  
Low Cost Housing ◽  
The Government ◽  
Almost All ◽  
The City ◽  
Collection Methods

Bridgeheader is one of the typology of low-income people in the city who assume that the house is only ‘a springboard’ for their life in the city. This group of people dwelt not far from the location of their place to work; occupying marginal spaces in the city and its environment tend to be slump. Almost all areas in the city of Jakarta have marginal spaces, therefore the government attempt to improve the quality of their houses, for example by providing low-cost housing. In fact the low-cost house which was provided by the government failed to be ‘consumed’ by the brigdeheaders at the time when the used value of the house has been turned into market value. The research aimed to determine such approaches of use value of the house that can be ‘consumed’ by the brigdeheader, but did not undermine the space in the city. Data collection methods using practical observation conducted with interviews. While the analysis using descriptive pragmatic method in four case study area in Jakarta. The findings indicate that the concept of house for this group is not determined only by the ‘low price tag’ but also ‘the way of use’ of the space contributed with the result that the house can be ‘consumed’ well.

An Approach for Concurrent and Integrated Material Selection and Dimensional Synthesis

1992 ◽  
Vol 114 (4) ◽  
pp. 633-641 ◽  
Author(s):  
H. M. Karandikar ◽  
F. Mistree
Keyword(s):  
Composite Materials ◽  
Design Problem ◽  
Material Selection ◽  
Dimensional Synthesis ◽  
Efficient Operation ◽  
Almost All ◽  
Domain Independent ◽  
Selection Phase

Difficulty in material selection is often mentioned as a reason for lengthy design cycles. Problems dealing with material selection play a central role in almost all design and are generally tackled using the experience-based judgment of a designer. Better methods for material selection are needed, however, because demands of efficient operation require judicious use of materials and there is increasing pressure to reduce costs. To date, material selection and dimensional synthesis of artifacts have mostly been tackled sequentially rather than concurrently. In this paper, a domain-independent, algorithmic method to guide a designer in the material selection phase of design is presented. The method enables concurrent determination of the material and the dimensions for an artifact. The approach, applicable to any material selection and design problem, is illustrated by a case study dealing with the design of a component made of composite materials.

scholarly journals FLIP FABRIC AND NAME BOARD (CASE STUDY IN PANGKALPINANG CITY, BANGKA BELITUNG ISLANDS)

2020 ◽  
Vol 12 (1) ◽  
pp. 44
Author(s):  
Muhammad Iqbal Arrosyad ◽  
Asyraf Suryadin ◽  
Harun Joko Prayitno
Keyword(s):  
Data Collection ◽  
Foreign Languages ◽  
The Public ◽  
Qualitative Descriptive ◽  
Data Collection Technique ◽  
Almost All ◽  
The City ◽  
Descriptive Method ◽  
Local Languages

This study aims to explain the forms of fabrik range errors and nameplate in the City of Pangkalpinang, Bangka Belitung Islands and find out the factors behind the occurrence of errors in the use of Indonesian in the fabric range and nameplate in the City of Pangkalpinang, Islands. Bangka Belitung. The method used in this research is qualitative descriptive method. The data collection technique used is the triangulation technique which consists of observation, documentation, and interviews. The subjects in this study were all fabric ranges and nameplate in the city of Pangkalpinang, Bangka Belitung Islands which experienced errors in writing with the use of Indonesian. The results of this study are: the form of class that is often done is in writing sentences in foreign languages, the use of non-standard words, the use of abbreviated words that are not explained, and the use of local languages. and the lack of understanding of the owner of the fabric, the education of the owner or maker cannot be biased because there are still errors even though the education is high through S2, then the purpose of making it does not pay attention to the rules of writing. and almost all spandex fabric or nameplate no one gives input or criticism, it's just that there are some from the public who ask questions related to writing or related businesses.

Sign in / Sign up

Export Citation Format

Share Document