Rehabilitation of the Kumho Group Seoul Headquarters, Korea

2010 ◽  
pp. 95-114
Author(s):  
Geonho Hong ◽  
Youngsoo Chung ◽  
Hyekyo Chung
Keyword(s):  
Architectural Design ◽  
Large Scale ◽  
Office Building ◽  
Floor Slab ◽  
Financial Difficulties ◽  
Rehabilitation Work ◽  
Below Ground ◽  
Plan Design

<p>This paper is a case study of an office building rehabilitation in Seoul, Korea. The partly built building, originally designed as a general office building, contained 20 stories above and seven below ground. After the first floor slab was constructed, construction was stopped because of financial difficulties of the previous owner. The new owner revised the architectural plan, design, and height of the building with 29 stories above and eight below ground. Because of the long-term stop of the construction and change of the architectural design, large-scale repair and rehabilitation work was carried out in 2006.</p>

scholarly journals A Combined Approach for Model-Based PV Power Plant Failure Detection and Diagnostic

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1261
Author(s):  
Christopher Gradwohl ◽  
Vesna Dimitrievska ◽  
Federico Pittino ◽  
Wolfgang Muehleisen ◽  
András Montvay ◽  
...  
Keyword(s):  
Power Plants ◽  
Large Scale ◽  
Failure Detection ◽  
Energy Yield ◽  
Combined Approach ◽  
Levelized Cost Of Electricity ◽  
Term Operation ◽  
Model Based

Photovoltaic (PV) technology allows large-scale investments in a renewable power-generating system at a competitive levelized cost of electricity (LCOE) and with a low environmental impact. Large-scale PV installations operate in a highly competitive market environment where even small performance losses have a high impact on profit margins. Therefore, operation at maximum performance is the key for long-term profitability. This can be achieved by advanced performance monitoring and instant or gradual failure detection methodologies. We present in this paper a combined approach on model-based fault detection by means of physical and statistical models and failure diagnosis based on physics of failure. Both approaches contribute to optimized PV plant operation and maintenance based on typically available supervisory control and data acquisition (SCADA) data. The failure detection and diagnosis capabilities were demonstrated in a case study based on six years of SCADA data from a PV plant in Slovenia. In this case study, underperforming values of the inverters of the PV plant were reliably detected and possible root causes were identified. Our work has led us to conclude that the combined approach can contribute to an efficient and long-term operation of photovoltaic power plants with a maximum energy yield and can be applied to the monitoring of photovoltaic plants.

scholarly journals ENVIRONMENTAL POLLUTION BY WASTEWATER FROM BROWN COAL PROCESSING ¬ A REMEDIATION CASE STUDY IN GERMANY

2014 ◽  
Vol 22 (1) ◽  
pp. 71-83 ◽  
Author(s):  
Arndt Wiessner ◽  
Jochen A. Müller ◽  
Peter Kuschk ◽  
Uwe Kappelmeyer ◽  
Matthias Kästner ◽  
...  
Keyword(s):  
Environmental Pollution ◽  
Large Scale ◽  
Pilot Scale ◽  
Wastewater Disposal ◽  
Interdisciplinary Approaches ◽  
Phenolic Wastewater ◽  
Term Monitoring

The large scale of the contamination by the former carbo-chemical industry in Germany requires new and often interdisciplinary approaches for performing an economically sustainable remediation. For example, a highly toxic and dark-colored phenolic wastewater from a lignite pyrolysis factory was filled into a former open-cast pit, forming a large wastewater disposal pond. This caused an extensive environmental pollution, calling for an ecologically and economically acceptable strategy for remediation. Laboratory-scale investigations and pilot-scale tests were carried out. The result was the development of a strategy for an implementation of full-scale enhanced in situ natural attenuation on the basis of separate habitats in a meromictic pond. Long-term monitoring of the chemical and biological dynamics of the pond demonstrates the metamorphosis of a former highly polluted industrial waste deposition into a nature-integrated ecosystem with reduced danger for the environment, and confirmed the strategy for the chosen remediation management.

Numerical Modelling of a District Scale Groundwater Heat Pump Operation: Case Study from Colchester, UK

2021 ◽  
Author(s):  
Taha Sezer ◽  
Abubakar Kawuwa Sani ◽  
Rao Martand Singh ◽  
David P. Boon
Keyword(s):  
Large Scale ◽  
District Level ◽  
Thermal Plume ◽  
Injection Wells ◽  
Term Operation ◽  
Heating And Cooling ◽  
Groundwater Heat Pump ◽  
The Impact

&lt;p&gt;Groundwater heat pumps (GWHP) are an environmentally friendly and highly efficient low carbon heating technology that can benefit from low-temperature groundwater sources lying in the shallow depths to provide heating and cooling to buildings. However, the utilisation of groundwater for heating and cooling, especially in large scale (district level), can create a thermal plume around injection wells. If a plume reaches the production well this may result in a decrease in the system performance or even failure in the long-term operation. This research aims to investigate the impact of GWHP usage in district-level heating by using a numerical approach and considering a GWHP system being constructed in Colchester, UK as a case study, which will be the largest GWHP system in the UK. Transient 3D simulations have been performed pre-construction to investigate the long-term effect of injecting water at 5&amp;#176;C, into a chalk bedrock aquifer. Modelling suggests a thermal plume develops but does not reach the production wells after 10 years of operation. The model result can be attributed to the low hydraulic gradient, assumed lack of interconnecting fractures, and large (&gt;500m) spacing between the production and injection wells. Model validation may be possible after a period operational monitoring.&lt;/p&gt;

scholarly journals Challenges in modelling isoprene and monoterpene emission dynamics of Arctic plants: a case study from a subarctic tundra heath

2016 ◽  
Vol 13 (24) ◽  
pp. 6651-6667 ◽  
Author(s):  
Jing Tang ◽  
Guy Schurgers ◽  
Hanna Valolahti ◽  
Patrick Faubert ◽  
Päivi Tiiva ◽  
...  
Keyword(s):  
Response Curve ◽  
Large Scale ◽  
Ecosystem Model ◽  
The Arctic ◽  
Short Term ◽  
Response Curves ◽  
Arctic Plants ◽  
Scale Modelling

Abstract. The Arctic is warming at twice the global average speed, and the warming-induced increases in biogenic volatile organic compounds (BVOCs) emissions from Arctic plants are expected to be drastic. The current global models' estimations of minimal BVOC emissions from the Arctic are based on very few observations and have been challenged increasingly by field data. This study applied a dynamic ecosystem model, LPJ-GUESS, as a platform to investigate short-term and long-term BVOC emission responses to Arctic climate warming. Field observations in a subarctic tundra heath with long-term (13-year) warming treatments were extensively used for parameterizing and evaluating BVOC-related processes (photosynthesis, emission responses to temperature and vegetation composition). We propose an adjusted temperature (T) response curve for Arctic plants with much stronger T sensitivity than the commonly used algorithms for large-scale modelling. The simulated emission responses to 2 °C warming between the adjusted and original T response curves were evaluated against the observed warming responses (WRs) at short-term scales. Moreover, the model responses to warming by 4 and 8 °C were also investigated as a sensitivity test. The model showed reasonable agreement to the observed vegetation CO2 fluxes in the main growing season as well as day-to-day variability of isoprene and monoterpene emissions. The observed relatively high WRs were better captured by the adjusted T response curve than by the common one. During 1999–2012, the modelled annual mean isoprene and monoterpene emissions were 20 and 8 mg C m−2 yr−1, with an increase by 55 and 57 % for 2 °C summertime warming, respectively. Warming by 4 and 8 °C for the same period further elevated isoprene emission for all years, but the impacts on monoterpene emissions levelled off during the last few years. At hour-day scale, the WRs seem to be strongly impacted by canopy air T, while at the day–year scale, the WRs are a combined effect of plant functional type (PFT) dynamics and instantaneous BVOC responses to warming. The identified challenges in estimating Arctic BVOC emissions are (1) correct leaf T estimation, (2) PFT parameterization accounting for plant emission features as well as physiological responses to warming, and (3) representation of long-term vegetation changes in the past and the future.

scholarly journals South Africa’s Community Work Programme: Local Peacebuilding Innovation Within a National Developmental Architecture

2019 ◽  
Vol 14 (1) ◽  
pp. 49-62
Author(s):  
Hugo van der Merwe ◽  
Malose Langa
Keyword(s):  
Large Scale ◽  
Public Employment ◽  
Local Ownership ◽  
Community Work ◽  
Employment Sector ◽  
Local Actors ◽  
Work Programme ◽  
Local Safety

This article examines South Africa’s Community Work Programme (CWP) as a case study of an attempt to address two key dilemmas facing peacebuilding theory and practise: (a) balancing the need to address immediate and long-term causes of conflict and violence and (b) balancing the need for a large-scale systematic approach whilst creating space for local ownership and agency. Drawing on in-depth case studies of six CWP community interventions, it demonstrates how this national public employment sector programme has been shaped into a vehicle for peacebuilding by local actors. Whilst these initiatives still face resistance to local ownership and innovation, they demonstrate how local agency can integrate national developmental priorities with local safety and security priorities.

scholarly journals MAINTAINABILITY, DESIGN PROCESSES AND BUILDING SERVICES -A CASE STUDY OF SELECTED BUILDINGS IN THE RIVERS STATE UNIVERSITY

2021 ◽  
pp. 18-28
Author(s):  
Chioma Okandu ◽  
Chizy Akani ◽  
Warebi Brisibe
Keyword(s):  
Architectural Design ◽  
Large Scale ◽  
Critical Role ◽  
State University ◽  
Design Processes ◽  
Building Maintenance ◽  
Role Design ◽  
The University ◽  
Rivers State

The paper examines the issues of building maintenance of public buildings from an architectural design-based perspective.It considered the critical role design plays in achieving the optimal functionality of building services throughout the building life span. Design related elements and components which facilitate maintainability are discussed. Institutional buildings at the university in their current state are considered against these dimensions. The research adopts a case study/ review approach. The study focused on multi-story structures existing in the university. Findings of the study reveal poor considerations for maintainability in design processes, resulting in inefficiency of building services on a large scale.

scholarly journals Engaging Adults Experiencing Homelessness in Smoking Cessation Through Large-Scale Community Service Events

2019 ◽  
Vol 20 (3) ◽  
pp. 325-327 ◽  
Author(s):  
Maya Vijayaraghavan ◽  
Dorie E. Apollonio
Keyword(s):  
Smoking Cessation ◽  
San Francisco ◽  
Community Service ◽  
Large Scale ◽  
The United States ◽  
Service Delivery Model ◽  
Smoking Cessation Counseling ◽  
Health Related

Cigarette smoking contributes substantially to the increased financial- and health-related burdens among adults experiencing homelessness. We describe findings from a case study of a model to increase access to cessation services among adults experiencing homelessness. In partnership with Project Homeless Connect (PHC), we piloted a unique service delivery model that involved providing brief cessation counseling and pharmacotherapy to smokers from this population attending large-scale service events in San Francisco, with the goal of connecting them to long-term smoking cessation care. We participated in three service events between October 2017 and March 2018. We offered brief smoking cessation counseling to 45 individuals, and smoking cessation counseling and pharmacotherapy to 7 individuals experiencing homelessness. This model could improve public health if expanded to other cities, particularly the 200 other cities in the United States offering PHC service events.

The Rise and Fall of Jesse Binga, a Black Chicago Financial Wizard

2017 ◽  
Author(s):  
Robert Howard
Keyword(s):  
African American ◽  
Real Estate ◽  
Black Business ◽  
Office Building ◽  
The Great Depression ◽  
Financial Difficulties ◽  
Dramatic Rise ◽  
Business District ◽  
State Street

The chapter surveys the life and career of Jesse Binga, a prominent local real estate mogul and banker. At the peak of his career, Binga controlled the Binga State Bank (BSB) and built the Binga Arcade Building, a five-story office building in the heart of the 35th and State Street black business district. With the onset of the Great Depression, the Binga State Bank, like many others, began to experience financial difficulties. What made matters worse for Binga were revelations that he apparently embezzled money from the BSB to help keep his financial empire afloat. In the end, the Binga State Bank closed its doors and Binga spent time in prison. His dramatic rise and fall represents a fascinating case study of African American entrepreneurship.

Unattended Sensors in Marine Environments

2015 ◽  
pp. 285-308
Author(s):  
Rizal Mohd Nor ◽  
Mikhail Nesterenko
Keyword(s):  
Temperature Sensor ◽  
Architectural Design ◽  
World Wide ◽  
Oxygen Sensor ◽  
Satellite Transmitter ◽  
Total Cost ◽  
Commercial Off The Shelf ◽  
Embedded Pc

This chapter discusses the use of unattended sensors and its use in marine environment. The authors present challenges of designing a marine sensor in harsh environments and a case study in implementing a marine sensor to study hypoxia. Hypoxia is a world-wide anthropogenic phenomenon related to pollution. The authors describe the construction of an inexpensive sensor buoy system, Oxybuoy, designed for long-term unattended oxygen sensor measurements. The technology is available to construct such sensor buoys. The authors showed a prototype based on commercial off-the shelf components: an embedded PC, an optical dissolved oxygen sensor, a temperature sensor, a Wi-Fi transmitter and a satellite transmitter. Its total cost is around $5,000 to construct, program and test a proof of concept of such sensor. The authors describe the buoy's architectural design and three experiments that the authors carried out to demonstrate its viability.

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