Window geometry impact on a room's wind comfort

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Reza Fallahtafti ◽  
Mohammadjavad Mahdavinejad
Keyword(s):  
Wind Velocity ◽  
Natural Ventilation ◽  
Control Volume ◽  
Simple Algorithm ◽  
Small Scale ◽  
Solar Absorption ◽  
Content Type ◽  
Velocity Magnitude ◽  
Architectural Element ◽  
The Impact

PurposeNatural ventilation is an environmentally friendly effective way of improving thermal comfort and the quality of indoor conditions if applied properly. This study aims to investigate the physical mechanism of the air movement and also the influence of building geometry in a cross-ventilated room through a parametric study of window geometrical characteristics using computational fluid dynamics.Design/methodology/approachMomentum and continuity equations are solved by the control volume method using a commercially available software. Standard k−ɛ turbulence model is employed to simulate the incompressible airflow and SIMPLE algorithm to solve the conservation equations. Mean air velocity magnitude is measured at three different surfaces of different heights, and the effect of incoming wind velocity inside the building is studied.FindingsThe research concluded that window hood and sill projections reduce indoor wind velocity magnitude, play a major role in incoming wind direction and thus have a crucial impact on wind circulation and indoor air quality.Social implicationsThe paper has evaluated redesigning of a both practical and ornamental architectural element named Palekaneh, which is found in many historical buildings in several hot places in the world. Its optimal design could increase indoor natural ventilation quality and decrease a space's cooling load. Therefore, a new passive cooling architectural element could be re-introduced to the regions previously enjoying such ornaments. This is economically efficient because it eventually saves a considerable amount of energy in the long run and is socially important because of the revitalization of architectural identity.Originality/valueThe role of a building envelope's physical features, although being studied for solar absorption and daylight availability, has rarely been investigated for natural ventilation, especially in a small scale, thus making the paper novel in this regard. This provides a guideline for designers to assess the impact of their design on redirecting wind-induced natural ventilation the very early stages of design.

scholarly journals Effects of agricultural credit on wheat productivity of small farms in Sindh, Pakistan

2018 ◽  
Vol 78 (5) ◽  
pp. 592-610 ◽  
Author(s):  
Abbas Ali Chandio ◽  
Yuansheng Jiang ◽  
Feng Wei ◽  
Xu Guangshun
Keyword(s):  
Wheat Yield ◽  
Considerable Proportion ◽  
Small Scale ◽  
Small Farms ◽  
Short Term ◽  
Agricultural Credit ◽  
Data Set ◽  
Content Type ◽  
The Impact

Purpose The purpose of this paper is to evaluate the impact of short-term loan (STL) vs long-term loan (LTL) on wheat productivity of small farms in Sindh, Pakistan. Design/methodology/approach The econometric estimation is based on cross-sectional data collected in 2016 from 18 villages in three districts, i.e. Shikarpur, Sukkur and Shaheed Benazirabad, Sindh, Pakistan. The sample data set consist of 180 wheat farmers. The collected data were analyzed through different econometric techniques like Cobb–Douglas production function and Instrumental variables (two-stage least squares) approach. Findings This study reconfirmed that agricultural credit has a positive and highly significant effect on wheat productivity, while the short-term loan has a stronger effect on wheat productivity than the long-term loan. The reasons behind the phenomenon may be the significantly higher usage of agricultural inputs like seeds of improved variety and fertilizers which can be transformed into the wheat yield in the same year. However, the LTL users have significantly higher investments in land preparation, irrigation and plant protection, which may lead to higher wheat production in the coming years. Research limitations/implications In the present study, only those wheat farmers were considered who obtained agricultural loans from formal financial institutions like Zarai Taraqiati Bank Limited and Khushhali Bank. However, in the rural areas of Sindh, Pakistan, a considerable proportion of small-scale farmers take credit from informal financial channels. Therefore future researchers should consider the informal credits as well. Originality/value This is the first paper to examine the effects of agricultural credit on wheat productivity of small farms in Sindh, Pakistan. This paper will be an important addition to the emerging literature regarding effects of credit studies.

Examining the impact of political candidates on hotel revenue

2019 ◽  
Vol 3 (1) ◽  
pp. 36-53
Author(s):  
Amanda Belarmino ◽  
Elizabeth A. Whalen
Keyword(s):  
Design Methodology ◽  
The State ◽  
Small Scale ◽  
Structured Interviews ◽  
Political Candidates ◽  
Bandwagon Effect ◽  
Content Type ◽  
Political Candidate ◽  
The Usa ◽  
The Impact

Purpose The purpose of this paper is to examine the impact of a charismatic political candidate on hotel revenue in the USA, particularly in their home states, through the lens of the bandwagon effect. Previous researchers have found that political primaries have a significant impact on hotel revenue due to travel to those states; however, there has yet to be an examination of the impact of popular political candidates on hotel revenue. Design/methodology/approach This research examined the impact of Bernie Sanders’ campaign on hotel revenue in the state Vermont due to the relatively stable demand experienced in that market. First, the researchers used forecasting methodology and t-tests to determine if there was a significant increase in hotel revenue during the time of the Sanders’ campaign for the state and for Burlington, Vermont, his campaign headquarters. Then, eight semi-structured interviews were conducted with hoteliers in Vermont to determine if the Sanders’ campaign was responsible for the observed changes. Findings While the hotel revenue for the state was not significantly different than what would be expected, the hotel revenue in Burlington did see a significant increase. Hoteliers did attribute an increased awareness of the destination and some specific instances of travelers to Sanders’ campaign. Originality/value This is the first study to date to demonstrate the influence of a political candidate on hotel revenue and demonstrated that the bandwagon effect can impact hotel revenue. For hoteliers, it demonstrates that increased destination awareness can impact behavioral intentions on a small scale.

The failure of non‐binding declarations to achieve university sustainability

2007 ◽  
Vol 8 (3) ◽  
pp. 301-316 ◽  
Author(s):  
S.A. Bekessy ◽  
K. Samson ◽  
R.E. Clarkson
Keyword(s):  
Best Practice ◽  
Small Scale ◽  
Structured Interviews ◽  
Pilot Studies ◽  
Content Type ◽  
Institute Of Technology ◽  
University Leaders ◽  
The University ◽  
The Impact ◽  
Insight Into

PurposeThis paper aims to assess the impact and value of non‐binding agreements or declarations in achieving sustainability in universities.Design/methodology/approachA case study of Royal Melbourne Institute of Technology (RMIT) University is presented, analysing the reasons for lack of progress towards sustainability and evaluating best ways forward. Using a timeline and analysis of historical records for the 12 years since RMIT first engaged in the sustainability agenda, major trends in the process of implementing policies are identified. Secondly, 15 semi‐structured interviews with university leaders and key sustainability stakeholders from across the university are analysed to provide insight into how and why the university has failed to achieve sustainability.FindingsNew implications for successfully achieving sustainability arise from these findings. Accountability is a key issue, as RMIT appears to reap benefits from being signatory to declarations without achieving genuine progress. To ensure that declarations are more than simply greenwash, universities must open themselves up to scrutiny of progress to determine whether commitments have been honoured.Practical implicationsRelying on small‐scale “club” activities establishing demonstrations and raising awareness is unlikely to lead to permanent change. The evidence of RMIT's engagement with sustainability shows that, for example, even when successful pilot studies are conducted, these initiatives may do little to affect the mainstream practices of a university unless certain conditions exist. Furthermore, given the on‐paper commitments institutions have made, and the role of the university in society, small‐scale and gradual changes in university practice are a far from adequate response to the urgent sustainability imperative.Originality/valueThe initial engagement of RMIT University with the sustainability agenda 12 years ago marked it as a world leader in sustainability best‐practice. Analysing how and why such a disappointing lack of action has resulted from such promising beginnings provides insight into future directions for implementing sustainability in universities. The paper argues that considering the key responsibility of universities in leading the sustainability agenda, a more systemic and serious response is required.

scholarly journals Industry professionalisation of strata title managers: what are the implications for governance?

2015 ◽  
Vol 33 (2) ◽  
pp. 187-204 ◽  
Author(s):  
Erika Altmann
Keyword(s):  
Qualitative Research ◽  
Pilot Study ◽  
Design Methodology ◽  
Social Implications ◽  
Small Scale ◽  
Research Project ◽  
Content Type ◽  
Academic Literature ◽  
The Impact ◽  
Practical Implications

Purpose – The purpose of this paper is to explore the rise of strata manager as a newly emergent profession and note their impact on the governance within medium and high density, strata titled housing such as flats, apartments, town-houses and CIDs. Design/methodology/approach – This research presents finding from a small scale, qualitative research project focused on the interaction between the owner committee of management and strata managers. Findings – The introduction mandatory certification is championed by industry bodies. The strata managers considered they already demonstrated valuable attributes desired by committees of management. These differed to the attributes targeted by the new training regime, and the attributes valued by the committees of management. Research limitations/implications – This is a small scale pilot study. A larger study will need to be undertaken to confirm these results. Practical implications – There is a disjunct between the training and what strata managers consider relevant to undertaking their duties. This has significance for the ongoing governance of these properties and industry professionalisation. The resilience of Australia’s densification policies will depend on how learning will translate into better governance outcomes for owners. Social implications – One in three people within Australia’s eastern states lives or owns property within strata titled complex (apartments, flats and townhouse developments). The increasing number of strata managers and professionalisation within their industry has the ability to impact an increasing number of people. Originality/value – The impact of this new profession, and their requirements in terms of expertise has not been fully considered within existing academic literature.

scholarly journals Impact of roof geometry on cross-ventilation in vaulted buildings: a CFD study

2021 ◽  
Vol 2042 (1) ◽  
pp. 012106
Author(s):  
Milad Sadeghfar ◽  
Sadra Sahebzadeh
Keyword(s):  
Natural Ventilation ◽  
Volume Flow Rate ◽  
Large Set ◽  
Low Velocity ◽  
Mean Velocity ◽  
Flow Angle ◽  
High Rise ◽  
Velocity Magnitude ◽  
Flat Roof ◽  
The Impact

Abstract The roof geometry is an important parameter in determining the natural cross-ventilation in buildings. Although many studies have been performed on natural ventilation, the impact of the large set of vaulted roofs on the building cross-ventilation remains to be addressed. In this paper, high-fidelity computational fluid dynamics (CFD) simulations, validated with experimental data, are performed on five naturally ventilated buildings with two opposing windows, each with a specific type of vaulted roof and otherwise identical, in 0° incident flow angle, to assess the impact of vaulted roof geometry on the building cross-ventilation performance. The following vault geometries are investigated and compared against a flat-roof building with the same specifications: (i) segmental, (ii) low-rise pointed, (iii) mid-rise catenary (iv) high-rise pointed and (v) high-rise catenary. The results show that compared to the flat-roof building, the vaulted roofs cause a <5% decrease in volume flow rate and 16-29% increase in the average mean velocity magnitude at the occupants’ level. In vaulted buildings, the low-velocity regions of the flow are moved further away from the occupied zone towards the ceiling, thus providing a fresher air to the occupants. The results clarify the high potential of vaulted roofs for natural ventilation and sustainable design.

scholarly journals Customer categorization, relational justice and SME performance in supermarket supply chains

2019 ◽  
Vol 24 (3) ◽  
pp. 417-429 ◽  
Author(s):  
Ricardo Malagueño ◽  
Ismail Gölgeci ◽  
Andrew Fearne
Keyword(s):  
Supply Chains ◽  
Performance Outcomes ◽  
Small Scale ◽  
Least Squares Regression ◽  
Content Type ◽  
Relational Justice ◽  
Supplier Performance ◽  
The Impact ◽  
The Relationship ◽  
Key Customer

Purpose The purpose of this paper is to examine the impact of perceived relational justice on the relationship between key customer categorization and performance of small food and drink producers in supermarket supply chains. Design/methodology/approach Survey data are derived from a sample of (small-scale) suppliers of local and regional food to a large British supermarket. Partial least squares regression analysis was used to test a conceptual framework, which positions relational justice as a mediator in the relationship between key customer categorization and supplier performance, moderated by the length of the relationship. Findings The findings reveal that small suppliers who perceive their treatment by their key customers as fair tend to achieve higher business performance, which supports the hypothesized mediating role of relational justice on supplier performance. However, this research found no evidence to support the hypothesis that this role is moderated by the length of the relationship between the supplier and buyer. Originality/value This paper makes a novel empirical contribution, focusing on performance outcomes for small-scale suppliers in a highly competitive environment (fast-moving consumer goods) with customers (supermarkets) who have significant market power. Accordingly, the paper shows that the way supermarket buyers treat their suppliers matters more for the performance of their suppliers than the very fact that they are key customers.

Preparing for PhD: exploring doctoral students’ preparation strategy

2020 ◽  
Vol 11 (1) ◽  
pp. 89-106 ◽  
Author(s):  
Ahmad Thamrini Fadzlin Syed Mohamed ◽  
Ahmad Fahimi Amir ◽  
Nur Khadirah Ab. Rahman ◽  
Emily Abd Rahman ◽  
Afifah Quraishah Abdul Nasir
Keyword(s):  
Doctoral Students ◽  
Academic Career ◽  
Future Research ◽  
Small Scale ◽  
Content Type ◽  
Preparation Phase ◽  
Personal Level ◽  
Preparation Strategy ◽  
Professional Doctorates ◽  
The Impact

Purpose The purpose of this paper is to give insight on the important preparation task needed to be considered by prospective PhD candidates prior to the start of their study. As pursuing and obtaining a higher degree qualification is becoming more eminent for those who want to advance their academic career, crucial preparation is needed before embarking on the doctoral quest. Design/methodology/approach A small-scale study of the PhD experience was carried out in a public university in Malaysia using semi-structured in-depth interviews with eight successful doctoral students representing three different faculties to assess respondents’ experiences concerning the preparation aspect, challenges faced and strategies used to overcome the problem. Findings From the interview data, three overarching themes emerged: motives, task and financial and health as important dominators that could influence a successful venture of a PhD journey. Research limitations/implications As the present research respondents were few, further research with bigger number of respondents may shed better light in identifying other important aspect in preparation for PhD. The authors are unable, in the space of this paper, to fully explore the implications of the data, and the work of others that it builds on, for the future of professional doctorates or other types of PhD awards. As professional doctorates are fully concentrated on their professional endeavour, i.e. nursing and education, the preparation needed may include different groundwork. In addition, this study was carried out in Malaysia, where the system may not necessarily share the same characteristics to other doctoral systems in other countries. Cultural differences, the impact of age, gender and race, were other variables that could be weighed by future research in the same area. Practical implications The university’s graduate office should line-up courses to inform future doctoral candidates on the aspect of preparation at personal level that the students need to carry out. Social implications The study provides new views where potential doctoral students should be helped and guided to become more consciously aware of their decision in pursuing a higher degree. This paper provides suggestions on the guidelines of the initial preparation needed before embarking on a PhD journey and managing their own learning. Originality/value The paper establishes the important aspect of the preparation phase needed to be considered by future doctoral students before pursuing their doctoral quest.

Why are strangers trusted more during trade fairs? A literature review on the conceptual model of general trust formation

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Minjiang Jia ◽  
Chunlin Wan
Keyword(s):  
Literature Review ◽  
Conceptual Model ◽  
Trade Fair ◽  
Small Scale ◽  
Content Type ◽  
General Trust ◽  
Trust Formation ◽  
Trust Propensity ◽  
The Impact ◽  
Business To Business

Purpose Considering that low-level general trust may hinder communication, this study aims to detect the factors that can influence general trust between exhibitors and visitors during business-to-business trade fairs. Design/methodology/approach Based on a literature review and stakeholders’ behavior analysis, a conceptual model of general trust formation between exhibitors and visitors is proposed. Findings The preconditions of strangers’ general trust patterns mainly include their early experience regarding trust, institutional trust in the environment and trust propensity. Stakeholders’ treatment, trust transfer, on-site restraints, reward and punishment expansion and on-site personnel arrangement may facilitate the formation of general trust between exhibitors and visitors. Research limitations/implications This paper is a conceptual article that requires further investigation to verify the main factors that influence general trust and the impact of general trust on other trust components between exhibitors and visitors. Practical implications Organizers, exhibitors and visitors should pay attention to participants’ selection, supervision, self-discipline and personnel management before and during trade fairs. International and small-scale, especially new trade fairs in developed and developing countries, must consider additional measures to improve general trust. Originality/value The existing literature has not focused on general trust in the trade fair context. In this paper, research on network and relationship marketing is further deepened in terms of a specific trust type. The interactions between stakeholders before and during fair may promote general trust among participants than in other settings, which partially explains why trade fair (even other two-sided markets) can increase social capital.

The impact of natural ventilation on airborne biocontaminants: a study on COVID-19 dispersion in an open office

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Günsu Merin Abbas ◽  
Ipek Gursel Dino
Keyword(s):  
Indoor Air ◽  
Natural Ventilation ◽  
Infection Risk ◽  
Content Type ◽  
Air Contamination ◽  
Simulation Based ◽  
Time Of Infection ◽  
Free Running ◽  
The Impact ◽  
Open Office

PurposeBiocontaminants represent higher risks to occupants' health in shared spaces. Natural ventilation is an effective strategy against indoor air biocontamination. However, the relationship between natural ventilation and indoor air contamination requires an in-depth investigation of the behavior of airborne infectious diseases, particularly concerning the contaminant's viral and aerodynamic characteristics. This research investigates the effectiveness of natural ventilation in preventing infection risks for coronavirus disease (COVID-19) through indoor air contamination of a free-running, naturally-ventilated room (where no space conditioning is used) that contains a person having COVID-19 through building-related parameters.Design/methodology/approachThis research adopts a case study strategy involving a simulation-based approach. A simulation pipeline is implemented through a number of design scenarios for an open office. The simulation pipeline performs integrated contamination analysis, coupling a parametric 3D design environment, computational fluid dynamics (CFD) and energy simulations. The results of the implemented pipeline for COVID-19 are evaluated for building and environment-related parameters. Study metrics are identified as indoor air contamination levels, discharge period and the time of infection.FindingsAccording to the simulation results, higher indoor air temperatures help to reduce the infection risk. Free-running spring and fall seasons can pose higher infection risk as compared to summer. Higher opening-to-wall ratios have higher potential to reduce infection risk. Adjacent window configuration has an advantage over opposite window configuration. As a design strategy, increasing opening-to-wall ratio has a higher impact on reducing the infection risk as compared to changing the opening configuration from opposite to adjacent. However, each building setup is a unique case that requires a systematic investigation to reliably understand the complex airflow and contaminant dispersion behavior. Metrics, strategies and actions to minimize indoor contamination risks should be addressed in future building standards. The simulation pipeline developed in this study has the potential to support decision-making during the adaptation of existing buildings to pandemic conditions and the design of new buildings.Originality/valueThe addressed need of investigation is especially crucial for the COVID-19 that is contagious and hazardous in shared indoors due to its aerodynamic behavior, faster transmission rates and high viral replicability. This research contributes to the current literature by presenting the simulation-based results for COVID-19 as investigated through building-related and environment-related parameters against contaminant concentration levels, the discharge period and the time of infection. Accordingly, this research presents results to provide a basis for a broader understanding of the correlation between the built environment and the aerodynamic behavior of COVID-19.

Research on the impact of green bond issuance on the stock price of listed companies

Kybernetes ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Bin Xi ◽  
Huimin Jing
Keyword(s):  
Stock Price ◽  
Five Factor Model ◽  
Listed Companies ◽  
Pollutant Emission ◽  
Small Scale ◽  
Price Effect ◽  
Investor Attention ◽  
Content Type ◽  
The Impact ◽  
First Time

PurposeConsidering that listed companies are the main body of natural resource consumption and pollutant emission, this study aims to explore the stock price effect and source channels of green bond issuance of listed companies. This is extremely necessary to promote listed companies to actively fulfill their environmental responsibilities so as to achieve sustainable economic and social development.Design/methodology/approachIn this paper, the companies that issued green bonds in Shanghai and Shenzhen stock markets in China from 2016 to 2018 are used as samples. First of all, the authors adopt the event study method and match the two models to prove that there is a stock price effect in green bond issuance. Then, the authors introduce the general regression model to analyze the sources of the stock price effect of green bond issuance in detail through three channels: “financing cost,” “investor attention” and “fundamental.”FindingsIn the above three channels, the “investor attention” channel can well explain the stock price effect of green bond issuance. Meanwhile, the authors also find that the stock price effect of the subsequent issuance of green bonds is more significant than that of the first time, non-financial companies are more pronounced than financial companies, public issuance are more obvious than private issuance, state-owned companies are more notable than non-state-owned companies, small-scale companies are more evident than large-scale companies and companies with high equity concentration are clearer than those with low equity concentration.Originality/valueTaking China as the research object for the first time, this paper comprehensively employs the capital asset pricing model and Fama–French five-factor model to discuss the stock price effect of green bond issuance of listed companies. Secondly, this paper also studies whether the way of green bond issuance, the type and size of the company, as well as the degree of ownership concentration will have different effects on the stock prices of listed companies. The research results provide new ideas and methods for the stock price effect of green bond issuance.

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