Buildings are among the largest consumers of electricity in the US. A significant portion of this energy use in buildings can be attributed to HVAC systems used to maintain comfort for occupants. In most cases these building HVAC systems run on fixed schedules and do not employ any fine grained control based on detailed occupancy information. In this paper we present the design and implementation of a presence sensor platform that can be used for accurate occupancy detection at the level of individual offices. Our presence sensor is low-cost, wireless, and incrementally deployable within existing buildings. Using a pilot deployment of our system across ten offices over a two week period we identify significant opportunities for energy savings due to periods of vacancy. Our energy measurements show that our presence node has an estimated battery lifetime of over five years, while detecting occupancy accurately. Furthermore, using a building simulation framework and the occupancy information from our testbed, we show potential energy savings from 10% to 15% using our system.

[ACM Press the 2nd ACM Workshop - Zurich, Switzerland (2010.11.02-2010.11.02)] Proceedings of the 2nd ACM Workshop on Embedded Sensing Systems for Energy-Efficiency in Building - BuildSys \'10 - Occupancy-driven energy management for smart building automation

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Applied Multivariate Techniques

El artículo tiene como objetivo evaluar el nivel de desarrollo de la capacidad de absorción realizada (RACAP) en las Pyme colombianas. Se parte de una muestra de 363 Pyme colombianas (Dane,2012), se usa una revisión de literatura con apoyo del análisis de contenido y un modelo de regresión lineal, que permiten mostrar la existencia de una correlación lineal positiva entre la adquisición y asimilación del conocimiento externo en las organizaciones objeto de estudio,. Palabras clave: Capacidades de absorción, capacidades de absorción potencial, medición de las capacidades de absorción ABSTRACT:

Measurement of potential absorption capacity in Colombia's innovative companies [Medición de la capacidad de absorción potencial en las empresas innovadoras de Colombia]

Contractor selection is one of the main activities of clients. Without a proper and accurate method for selecting the most appropriate contractor, the performance of the project will be affected. The multi-criteria decisionmaking (MCDM) is suggested to be a viable method for contractor selection. The analytic hierarchy process (AHP) has been used as a tool for MCDM. However, AHP can only be employed in hierarchical decision
models. For complicated decision problems, the analytic network process (ANP) is highly recommended since ANP allows interdependent influences specified in the model. An example is demonstrated to illustrate how this method is conducted, including the formation of supermatrix and the limit matrix.

Contractor selection using the analytic network process

Proceedings of the 32nd Annual ARCOM Conference, 5-7 September 2016, Manchester. UK, Association of Researchers in Construction Management

Owing to new and emerging performance measurement for construction projects, clients of construction projects will continue to demand more complex projects and it is the responsibility of the participants, especially the contractors and consultants, to ensure that the industry continues to be relevant in the face of changing demands, needs and requirements. One of the means of achieving this is through adhering to the construction process and ensuring that the right mix of team members in terms of team roles and profession is in place for all construction work. In view of this, it is deemed necessary to discuss the nature and concept of construction projects in term of their objectives and processes. Various participants and stakeholders responsible for construction activities are explained while team roles as they relate to the key stakeholders are also discussed. In addition, the challenges of the construction process are highlighted and explained with a view to adopting the principle of value management to reduce or eliminate these.

Construction Projects and Stakeholders

This paper aims to present the results of an investigation of the prevailing challenges in construction information management. The study implemented a quantitative survey methodology, using a questionnaire to gather data from architects, civil engineers, quantity surveyors, mechanical and electrical engineers, construction managers, and project managers. Data analysis was conducted using the SPSS software package: applicable measures of dispersal were computed and inferential statistical tests performed. The study revealed that information management is a significant aspect of construction procedures and that a well-structured information system must be in place to achieve success in the construction domain. Additionally, the researchers discovered that construction information management could be affected by both internal and external factors within an organization. Further findings revealed that the major challenges in construction information management are long-term reliance on legacy systems, a lack of technological equipment, leadership development, poor financial investment in infrastructure for data management, and the implementation of appropriate policies by management. The primary contribution of this study lies in its appraisal of the difficulties facing construction information management and its identification of the relevant challenges, which can help in the proposal of solutions to improve methods of managing construction information, in turn producing improved performance and more efficient delivery of services on the part of professionals within the construction industry.

/pdf/challenges-confronting-construction-information-management-1fzaqr2u.pdf

Challenges confronting construction information management

PurposeThe paper assessed the required drivers of mentoring practices in construction-related firms: a perspective of the quantity surveying (QS) firms in Nigeria with a view to providing possible drivers for effective mentoring relationships in the respective construction firms.Design/methodology/approachSurvey design was used to assess the level of knowledge, mentoring concept adoption and the required drivers of mentoring relationships in construction-related firms. QS firms in Abuja, Nigeria were sampled through the use of semi-structured questionnaires. A total of 149 questionnaires were administered to principal partners, partners, senior quantity surveyors and quantity surveyors in QS firms in Abuja through personal delivery. A total of 142 of them were returned and found suitable for analysis, representing 95.30% effective response rate. Percentage, mean, Kruskal–Wallis and factor analyses were utilized for the analysis of the data.FindingsThe study revealed an appreciable knowledge of mentoring concept but not so much with the adoption in the respective firms. This connotes that there is a problem with the adoption of mentoring concept in construction-related firms despite knowledge of the concept. Also revealed by the study, are the required drivers of mentoring practices in construction-related firms.Practical implicationsThe findings show the required drivers of mentoring practices in construction-related firms and the recommendations to further the adoption and implementation of these drivers to ensure mentoring practices thrive in construction-related firms in the country.Originality/valueThis paper reveals the required drivers of mentoring practices in Nigerian construction-related firms and provides ways through which the drivers can be implemented in the construction firms.

Drivers of mentoring practices in construction related firms: Nigerian quantity surveying firms' perspective

Mentoring has been associated with many positive outcomes ranging from promotion, increased pay, job satisfaction, knowledge retention in organizations, reduced employee turnover as well as employe...

Factors affecting mentoring of professionals in construction firms: Nigerian quantity surveyors’ perspective

There are several benefits associated with sustainable value management if properly practised and adopted. As beneficial as the study can be to construction projects, there are some barriers that may hinder its adoption, the conducting of the study or the implementation of recommendations emanating from the study. This chapter discusses various limitations and hindrances to the successful initiation and implementation of sustainable value management. Three stages of the barriers to sustainable value management study in construction are discussed. The first is the willingness to accept and adopt the study for construction projects by the initial project stakeholders, especially the clients and lead consultants. This will depend on their experience of the study and their willingness to try something new. The other set of barriers arises during the conduct of the study which may include interference from the project team, and the inappropriate composition of the team. After the study, another barrier to sustainable value management is the willingness to accept and adopt recommendations emanating from the study for the construction projects under consideration.

Ayodeji Emmanuel Oke

Papers

Construction Projects and Stakeholders

Challenges confronting construction information management

Drivers of mentoring practices in construction related firms: Nigerian quantity surveying firms' perspective

Factors affecting mentoring of professionals in construction firms: Nigerian quantity surveyors’ perspective

Barriers of Sustainable Value Management