Blog List

Sunday, 9 April 2017

Collaborative 3D Modeling: Conceptual and Technical Issues

Author
Rafika Hajji and Roland Billen
Additional contact information

Abstract: The need of 3D city models increases day by day. However, 3D modeling still faces some impediments to be generalized. Therefore, new solutions such as collaboration should be investigated. The paper presents a new vision of collaboration applied on 3D modeling through the definition of the concept of a 3D collaborative model. The paper highlights basic questions to be considered for the definition and the development of that model then argues the importance of reuse of 2D data as a promising solution to reconstruct 3D data and to upgrade to integrated 3D solutions in the future. This idea is supported by a case study, to demonstrate how 2D/2.5D data collected from different providers in Walloon region in Belgium can be integrated and reengineered to match the specifications of a 3D building model compatible with the CityGML standard.
Date: 2016
References: Add references at CitEc
Citations Track citations by RSS feed
Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text
Access Statistics for this article
International Journal of 3-D Information Modeling (IJ3DIM) is currently edited by Jason Underwood
More articles in International Journal of 3-D Information Modeling (IJ3DIM) from  IGI Global
Series data maintained by Journal Editor (journaleditor@igi-global.com).

For further details log on website :
http://econpapers.repec.org/article/iggj3dim0/v_3a5_3ay_3a2016_3ai_3a3_3ap_3a47-67.htm

Analysis of the Complexities of Building Information Model(ling) Guides to Support Standardization

Author
Susan Keenliside and Megan Beange
Additional contact information

Abstract: The current approach to the development of a building information modelling (BIM) standard or guideline has provisioned for each individual authority in a unique way. There has been no universally standardized format, content or defined concepts employed in document development from one organization or region to the next. Though format and content vary widely according to the specific document scope and context, many published BIM guides around the world define the same, or similar, terms and concepts. The BIM guides project is the first attempt to leverage these existing publications within an open process of peer review and consensus standardization. It is believed that this structured approach to BIM document development will deliver increased efficiency in the creation and implementation of future Guidelines and Standards, contributing to the adoption and standardization of BIM within industry and providing the much needed universal baseline from which the many user-types of BIM can effectively build their knowledge, skills and abilities.
Date: 2016
References: Add references at CitEc
Citations Track citations by RSS feed
Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text
Access Statistics for this article
International Journal of 3-D Information Modeling (IJ3DIM) is currently edited by Jason Underwood
More articles in International Journal of 3-D Information Modeling (IJ3DIM) from  IGI Global
Series data maintained by Journal Editor (journaleditor@igi-global.com).

For further details log on website :
http://econpapers.repec.org/article/iggj3dim0/v_3a5_3ay_3a2016_3ai_3a3_3ap_3a18-30.htm

Description in BIM for 3D Indoor Navigation

Author
Abdoulaye Abou Diakité and Sisi Zlatanova
Additional contact information

Abstract: The BIM paradigm, supplied by appropriate standards like IFC, became unavoidable in recent construction projects. Several applications (e.g. indoor navigation, energy analysis ...) find in it a source of information on which they can rely. However, practices reveal that BIM models are not always directly reliable for applications and the latter have to ensure the validity of the data by their own. In the case of indoor navigation, the calculations will highly rely on the IfcSpace objects describing the rooms, in addition to their spatial relationships with their surrounding components. Unfortunately, it is common to face IFC models in which IfcSpace objects contain wrong geometric and topological description. In this paper, the authors discuss the issues related to BIM models validation for indoor navigation. Furthermore, they present a method to generate valid indoor spaces in IFC models. The approach relies on the structural components of the building (walls, slabs, etc.) and uses topological operations, supported by the combinatorial map data structure, to produce watertight space volumes.
Date: 2016
References: Add references at CitEc
Citations Track citations by RSS feed
Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text
Access Statistics for this article
International Journal of 3-D Information Modeling (IJ3DIM) is currently edited by Jason Underwood
More articles in International Journal of 3-D Information Modeling (IJ3DIM) from  IGI Global
Series data maintained by Journal Editor (journaleditor@igi-global.com).

For further details log on website :
http://econpapers.repec.org/article/iggj3dim0/v_3a5_3ay_3a2016_3ai_3a3_3ap_3a1-17.htm

Requirements, and Limitations of BIM for Offsite Timber Construction

Author
Panagiotis PatlakasJesus Menendez and Robert Hairstans
Additional contact information

Abstract: Offsite Timber Construction has the potential to deliver important benefits for the housing sector, but there are obstacles that prevent a more widespread adoption. The advent of Building Information Modelling (BIM) has the potential to address many of these, improving the process and enhancing the end product. The paper identifies the key aspects of offsite timber construction in which BIM can play a significant role, and describes the immediate benefits that can be derived from applying BIM to those, with an emphasis on the UK market. The respective limitations are identified and discussed. The issue of financial viability is addressed and suggestions are made about how research and government initiatives can provide support for those. Finally, the need for a mid-term paradigm shift in BIM is identified, moving towards a more open and extensible strategy for construction that can respond to the expanded needs of Offsite Timber Construction.
Date: 2015
References: Add references at CitEc
Citations Track citations by RSS feed
Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text
Access Statistics for this article
International Journal of 3-D Information Modeling (IJ3DIM) is currently edited by Jason Underwood
More articles in International Journal of 3-D Information Modeling (IJ3DIM) from  IGI Global
Series data maintained by Journal Editor (journaleditor@igi-global.com).

For further details log on website :
http://econpapers.repec.org/article/iggj3dim0/v_3a4_3ay_3a2015_3ai_3a1_3ap_3a54-70.htm

Marketing of Forest Products: Income and Employment Perspective - An Analysis

Author
Dr. G. Bhaskar and Dr. M. Yadagira Charyulu
Abstract: One phenomenon inherent in the nature of the plural society of the Indian subcontinent is the co-existence often in narrow space of populations varying greatly at the level of material and intellectual development (Haimendorf 1985). Confrontation and eventual harmonization are the two possible outcomes of such a state of affairs ((Haimendorf 1985). Though such a state of affairs have influenced and affected many distinct groups, main focus can be diverted towards socially, economically and politically powerful groups on one side and autochthonous societies / groups which persisted until recently in an archaic and in many respects primitive life–style on the other ((Haimendorf 1985). This is about 84.32 millions of tribal population of India according to 2001census, which constitute 8.2 percent of the total population. They are generally called Adivasis implying original inhabitants and are believed to be the earliest settlers in Indian peninsula. Out of such total tribal population, nearly 80 percent are found in central India, 12 percent in North Eastern States and the remaining in Southern India(Verma 1990). The recent studies under “people of India projects” have identified 636 communities among Scheduled Tribes(Singh 1993). From isolated and primitive bands like jarwas, Shompens of Andaman and Nicobar Islands the accultured Bhils, Parajs, Gonds, Chenchus and Koyas which are encysted in multi ethnic milieu, the country presents a colorful mosaic of tribal Life(L. P. Vidyarthi et. al, 1982). We usually find similar features among tribes such as: They live in relative isolation in hills and forests. Their sense of history is shallow and mixed with mythology. They have a very low level of socio economic development. In terms of their cultural ethos, language, customs, institutions, and beliefs they stand out from other sections of the society. As Adivasis, the triblas claim to be original inhabitants of India(L. P. Vidyarthi et. al, 1982).Yet for centuries they have been treated as second class citizens. They have remained the poorest of the poor, illiterate, ignorant and cut off from modern economic activity. During the British regime, tribes were totally neglected and were exploited, by then officials and it resulted in a number of revolts against the foreign rule. Many of the tribals sacrificed their lives in the freedom struggle and exemplified as martyrs (K. C. Pandey and P. C. Satapathy, 1989). This has given a fillip to the freedom movement. The independent modern India, inspired by high ideals of human dignity, equality and social justice that have been guaranteed by the constitution of India, the government has taken a keen interest in uplifting the tribals from their voews. The government of India has initiated a hoast of area and group specific activities during the Five Year Plans. As a part of Tribal sub-plan approach, the Govt. of India has taken up Modified Area Development Approach (MADA). At present Tribal sub-plan covers 184 Integrated Tribal Development Projects, 256 pockets of Tribal concentration, 8 clusters and 73 projects for primitive tribal groups. It spread over 19 states and union territories covering 5.01 sq. km and 37.2 million tribal population. There are 4.2 million Tribals in the state of Andhra Pradesh and it constitutes 6.15 percent to the total population and it is 7.41 percent of the total tribal population of India as per 2001 census. The scheduled area in the state is 29,683 sq. km and it is spread over in 9 districts including Warangal, which is the area of present study. There are as many as 33 tribes in Andhra Pradesh. Gonds, Koyas, Konda Reddy’s, Nayakapods, Chenchus and Savaras are some of the important tribes. Each tribe has typical problems of its own due to different socio-economic-political, historical, cultural, ethnic and environmental conditions. Depending on these factors these tribes remain at different levels of socio-psychological orientation, political and economic development but most of them are away from the national main stream. Even, we can find striking difference between tribes living in deep forest and those living in plains in their living conditions, nature of activity, mode of cultivation, employment, income levels, customs, social and cultural manifestations. To protect the interest of the Tribals the Government of Andhra Pradesh in accordance with Govt. of India has come up with a number of regulatory acts time to time such as, 1) Andhra Pradesh scheduled areas land transfer regulation act of 1955 2) Andhra Pradesh scheduled areas money lenders regulation act of 1960 3) Andhra Pradesh debt relief regulation act of 1960 4) Andhra Pradesh scheduled areas land transfer regulation act of 1970(Gopal Rao. N, 1978). Along with the above specified regulatory acts, the Government of Andhra Pradesh has established Girijan Co-operative Corporation(GCC), Girijan Development Agency (GDA) and Integrated Tribal Development Agency(ITDA) to support the tribes in their production and marketing activities and in promotion of education, employment and general living levels.
Keywords: AgribusinessLand Economics/UseMarketing (search for similar items in EconPapers)
References: Add references at CitEc
Citations Track citations by RSS feed
Downloads: (external link)
http://purl.umn.edu/198450 (application/pdf)
Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text
Access Statistics for this article
Scandinavian Forest Economics: Proceedings of the Biennial Meeting of the Scandinavian Society of Forest Economics is currently edited by May
More articles in Scandinavian Forest Economics: Proceedings of the Biennial Meeting of the Scandinavian Society of Forest Economics from  Scandinavian Society of Forest Economics Contact information at EDIRC.
Series data maintained by AgEcon Search (aesearch@umn.edu).

For further details log on website :
http://econpapers.repec.org/article/agsssfesf/198450.htm

Saturday, 8 April 2017

Proceedings of the Biennial Meeting of the Scandinavian Society of Forest Economics

Author
Anonymous and Björn Rosenquist
Keywords: Environmental Economics and PolicyLand Economics/Use (search for similar items in EconPapers)
References: View complete reference list from CitEc
Citations Track citations by RSS feed
Downloads: (external link)
http://purl.umn.edu/198739 (application/pdf)
Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text
Access Statistics for this article
Scandinavian Forest Economics: Proceedings of the Biennial Meeting of the Scandinavian Society of Forest Economics is currently edited by May
More articles in Scandinavian Forest Economics: Proceedings of the Biennial Meeting of the Scandinavian Society of Forest Economics from  Scandinavian Society of Forest Economics Contact information at EDIRC.
Series data maintained by AgEcon Search (aesearch@umn.edu).

For further details log on website :
http://econpapers.repec.org/article/agsssfesf/198739.htm

Creative Learning in Vida AB: A Case to describe organizational learning as a function of management style

Author
Peter Österberg

Abstract: Research in general suggests management style to be an important determinant for organizational adaptability in order to learn how to cope with new situations; this is important when major environmental changes encounters an organization, as the organization need to keep pace in order to staying competitive on the market. Other research suggests that this kind learning take place in an implicit communications process. It is also suggests clear and challenging super ordinate goal setting to be a strong determinant to explain individual and organizational commitment and performance in general, and to mediate organizational creativity to be market-based. During the weekend of 8-9 January 2005, a storm, Gudrun, hit south of Sweden with hurricane-force. The impact of the storm was devastating across society as it destroyed large areas of forest. According to the Swedish National Board of Forestry, 75 million cubic meters was destroyed or damages. In this situation, the C.E.O. of Vida AB decides to buy 1 million cubic meters of the trees that had fallen due to the impact of Gudrun. In reality C.E.O. committed himself to buy 3.5 million cubic meters of fallen trees, and to take the cost for those parts that would proved to be damages. The decision made by the C.E.O. is obviously clear and challenging, suggesting it to make members of the organization to commit themselves to fulfill that decision. But how they learned, or develop, abilities to cope with this major change is unclear.
Downloads: (external link)
http://purl.umn.edu/198738 (application/pdf)
Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text
Access Statistics for this article
Scandinavian Forest Economics: Proceedings of the Biennial Meeting of the Scandinavian Society of Forest Economics is currently edited by May
More articles in Scandinavian Forest Economics: Proceedings of the Biennial Meeting of the Scandinavian Society of Forest Economics from  Scandinavian Society of Forest Economics Contact information at EDIRC.
Series data maintained by AgEcon Search (aesearch@umn.edu).

For further details log on website :
http://econpapers.repec.org/article/agsssfesf/198738.htm

Timber demand/supply analysis of east Asian timber trade - trade among eight Japanese regions, China, Korea

Author
Kiyoshi Yukutake and Atsushi Yoshimoto

Abstract: Because of increasing supply of the imported wood at low price, the rate of wood selfsufficiency in Japan has dropped further below 20%. This resulted in abandoning the reforestation activities after harvesting, which could impinge on the sustainable forest management. In this study we first overview the current state of Japanese forestry with a focus on relationship between the timber market and the sustainable forest management. Secondly, we estimate price elasticity of lumber supply and demand for eight Japanese regions (Tohoku, Kanto, Hokuriku, Chubu, Kinki, Chugoku, Shikoku, and Kyushu), China and Korea. With the estimated price elasticities for these regions, we finally analyze the characteristics of the supply and demand structure through the spatial and inter-temporal partial equilibrium market model called JAFSEM (Japanese Forest Sector Model). Our results show the following; 1) at the present price level Japan would face to difficulty to continue the sustainable forest management, 2) Japanese regional lumber demand except Kyushu would increase, and 3) the additional demand for lumber would be met by Korea and China.
Downloads: (external link)
http://purl.umn.edu/198737 (application/pdf)
Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text
Access Statistics for this article
Scandinavian Forest Economics: Proceedings of the Biennial Meeting of the Scandinavian Society of Forest Economics is currently edited by May
More articles in Scandinavian Forest Economics: Proceedings of the Biennial Meeting of the Scandinavian Society of Forest Economics from  Scandinavian Society of Forest Economics Contact information at EDIRC.
Series data maintained by AgEcon Search (aesearch@umn.edu).

For further details log on website :
http://econpapers.repec.org/article/agsssfesf/198737.htm

Carbon pricing through subsidy payment for thinning activities in Japan

Author
Atsushi Yoshimoto

Abstract: Carbon pricing was conducted through the subsidy payment for thinning activities in Japan within the optimization framework for the forest stand management. The optimal forest stand management model called DP-KYSS (dynamic programming model for Kyushu stand simulator) was utilized for the analysis of a sugi (Cryptomeria japonia) forest stand in the Kyushu region, Japan. The analyses showed that the thinning subsidy activated thinning activities with the reduction of carbon sequestered in a forest stand. Considering subsidies as a compensation for carbon loss by thinning, the evaluation of carbon showed that the present net value of cost per unit carbon loss became the highest for the rotation age of 35 years and the minimum for the rotation age of 50 to 65 years dependent upon the subsidy measure. At the rotation age of 100 years, the present net value of cost per unit carbon loss was found to be 44.56 to 110.13 Euro/Ct. The analyses showed that lengthening the period for subsidy would reduce the value of carbon. Subsidy pays more with more thinning reducing carbon sequestered in a forest stand.
Downloads: (external link)
http://purl.umn.edu/198736 (application/pdf)
Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text
Access Statistics for this article
Scandinavian Forest Economics: Proceedings of the Biennial Meeting of the Scandinavian Society of Forest Economics is currently edited by May
More articles in Scandinavian Forest Economics: Proceedings of the Biennial Meeting of the Scandinavian Society of Forest Economics from  Scandinavian Society of Forest Economics Contact information at EDIRC.
Series data maintained by AgEcon Search (aesearch@umn.edu).

For further details log on website :
http://econpapers.repec.org/article/agsssfesf/198736.htm

Trade flows, unit prices and roundwood market integration in Northern Europe

Author
Jari ViitanenAnne ToppinenSurya Bahadur MagarBruce Michie and Anders Q. Nyrud

Abstract: Roundwood markets in Northern Europe have changed significantly due to the enlargement of EU in 1995 and 2004, and the formation of a common currency union between the 12 EU countries in 2001. However, wider research on the larger context of interaction between national markets in European Union is yet largely missing. This study shortly assesses roundwood market development and integration in Northern Europe. First, international roundwood and chips trade is studied by using simple descriptive analyses and annual national data from EFI’s and FAO’s databases for coniferous roundwood trade in 1980-2004. We classify countries as net importers or exporters of roundwood and examine how the trade flows have evolved over time. Second, we explore how the unit values of the roundwood and chips exports and imports have developed during 1980-2004, and explore signs for deepening integration of the roundwood markets in terms of convergence of unit prices and price variances. The results indicate that coniferous roundwood trade has been mainly moving from east (Russia, Baltic States) to west (Finland, Sweden, Norway), even though there has also been a small trading centre around Austria. The unit price development reveals that national export and import prices have clearly converged during the last decade.
Downloads: (external link)
http://purl.umn.edu/198735 (application/pdf)
Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text
Access Statistics for this article
Scandinavian Forest Economics: Proceedings of the Biennial Meeting of the Scandinavian Society of Forest Economics is currently edited by May
More articles in Scandinavian Forest Economics: Proceedings of the Biennial Meeting of the Scandinavian Society of Forest Economics from  Scandinavian Society of Forest Economics Contact information at EDIRC.
Series data maintained by AgEcon Search (aesearch@umn.edu).

For further details log on website :
http://econpapers.repec.org/article/agsssfesf/198735.htm

Advantages and Disadvantages of Fasting for Runners

Author BY   ANDREA CESPEDES  Food is fuel, especially for serious runners who need a lot of energy. It may seem counterintuiti...