scholarly journals THE STATISTICAL ANALYSIS OF THE INFLUENTIAL FACTORS TO INDOOR COMFORT : A study on indoor environment and comfort in offices based on synthetic investigations Part 2

2002 ◽  
Vol 67 (554) ◽  
pp. 77-84 ◽  
Author(s):  
Toshiyuki MIURA
Keyword(s):  
Statistical Analysis ◽  
Indoor Environment ◽  
Influential Factors ◽  
Indoor Comfort

scholarly journals Indoor Climate Performance in a Renovated School Building

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2827
Author(s):  
Pavla Mocová ◽  
Jitka Mohelníková
Keyword(s):  
Indoor Environment ◽  
Natural Ventilation ◽  
Carbon Dioxide Concentration ◽  
Heating System ◽  
Climatic Conditions ◽  
School Building ◽  
Ventilation Strategy ◽  
Indoor Climate ◽  
Microbiological Testing ◽  
Indoor Comfort

Indoor climate comfort is important for school buildings. Nowadays, this is a topical problem, especially in renovated buildings. Poorly ventilated school classrooms create improper conditions for classrooms. A post-occupancy study was performed in a school building in temperate climatic conditions. The evaluation was based on the results of long-term monitoring of the natural ventilation strategy and measurements of the carbon dioxide concentration in the school classroom’s indoor environment. The monitoring was carried out in an old school building that was constructed in the 1970s and compared to testing carried out in the same school classroom after the building was renovated in 2016. Surprisingly, the renovated classroom had a significantly higher concentration of CO2. It was found that this was due to the regulation of the heating system and the new airtight windows. The occupants of the renovated classroom have a maintained thermal comfort, but natural ventilation is rather neglected. A controlled ventilation strategy and installation of heat recovery units are recommended to solve these problems with the classroom’s indoor environment. Microbiological testing of the surfaces in school classrooms also shows the importance of fresh air and solar radiation access for indoor comfort.

scholarly journals A statistical Approach for Finding Influential Factors in Respect of Energy Consuming of A Car Passenger

2018 ◽  
Vol 213 ◽  
pp. 04002
Author(s):  
Hussein M. Ali ◽  
Asif Iqbal
Keyword(s):  
Statistical Analysis ◽  
Fuel Consumption ◽  
Statistical Approach ◽  
Energy Resource ◽  
Influential Factors ◽  
Fuel Saving ◽  
Affecting Factors ◽  
Fuel Prices ◽  
Energy Consuming ◽  
The Cost

Nowadays the usage of gasoline as an energy resource is one of the most important subjects in the engineering field. A car is one type of energy consumer. Energy is used to build the cars and to running it. The fuel prices are fluctuate, so it seems sensible to explore every avenue towards saving energy in cars making. and study the factors that affect its consumption. The aim of the present work is to explain theoretically the calculation of fuel saving and cost in a car passengers in a greater detail than it has been done before and to describe statistically the affecting factors upon it. A statistical analysis has been used to study the influence of the weight and acceleration of the car upon the fuel consumption. It was shown that the fuel consumption increases linearly with the increase of a car weight and accordingly, the cost per unit travel of the car will increase.

Research into behavioral traits of the susceptibility to the risk of significant financial misstatements

2020 ◽  
Vol 23 (3) ◽  
pp. 262-275
Author(s):  
S.V. Arzhenovskii ◽  
T.G. Sinyavskaya ◽  
A.V. Bakhteev
Keyword(s):  
Risk Assessment ◽  
Statistical Analysis ◽  
High Risk ◽  
Financial Reporting ◽  
Influential Factors ◽  
Assessment Model ◽  
Expert Survey ◽  
Personal Traits ◽  
Behavioral Traits ◽  
The Impact

Subject. The article identifies behavioral signs of the susceptibility to the risk of material misstatements through the expert survey of professional auditors. Objectives. We do empirical research into the impact five behavioral traits have, which we discovered through the two parameter risk assessment model, i.e. tolerance to violation of laws, money pathology, susceptibility to high risk, aspiration of impunity and legislative illiteracy in finance. Method.s We performed the expert survey of professional auditors to discover what determines the susceptibility to fraud among those charged with financial reporting. The expert group was made on the basis of an unbiased approach and documentation. We applied the Rasch model to rank personal traits. The collected data were processed with methods of descriptive statistics and multivariate statistical analysis. Results. Carrying out the statistical analysis of experts’ opinions, we found that their significantly correlated. Personal traits were sorted by their impact on risk assessment. Money pathology, susceptibility to high risk, aspiration of impunity and legislative illiteracy in finance were acknowledged as the most influential factors in terms of the susceptibility to misstatements of financial reporting. Conclusions and Relevance. We empirically proved the importance of factors influencing the propensity to risk of misstating financial reports. We used our own theoretical concept. The findings can be useful to auditing forms to detect the customers’ propensity to the risk of manipulating financial reporting.

On-body channel statistical analysis based on measurements in an indoor environment at 2.45 GHz

2012 ◽  
Vol 6 (6) ◽  
pp. 636 ◽  
Author(s):  
A. Michalopoulou ◽  
A.A. Alexandridis ◽  
K. Peppas ◽  
T. Zervos ◽  
F. Lazarakis ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Indoor Environment

Statistical Analysis of Polarized Wide-Band MIMO Channels in an Indoor Environment

2010 ◽  
Vol 3 ◽  
pp. 94-103
Author(s):  
J.D. Muhehe ◽  
L.M. Muia ◽  
W.O. Ogola ◽  
C.G. Pardo ◽  
J. Molina-Garcia-Pardo ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Channel Capacity ◽  
Indoor Environment ◽  
Empirical Distribution ◽  
Wide Band ◽  
Signal To Noise ◽  
Mimo Channels ◽  
Maximum Capacity ◽  
Validity Test ◽  
5 Ghz

In this paper, a 2x2 and a 4x4 indoor MIMO measurement campaign at a (2 -5) GHz is presented. A statistical analysis to study the effects of a 2x2 and a 4x4 MIMO on the channel capacity with their respective received fixed signal to noise ratios were analyzed both in the LOS and in NLOS scenarios. Furthermore, investigations were carried out on all the possible wide band antenna polarizations in order to ascertain which mode of propagation yields a highly decorrelated spatial channel. The three received signal to noise ratios namely 10dB, 20dB and 30dB were used to model various received signal powers. It was found that copolar configurations HH and VV yielded the maximum capacity values both in the LOS and in NLOS respectively. Finally, a validity test was conducted and it was realized that the empirical distribution is similar and within the theoretical (i.i.d) distribution.

scholarly journals Thermal Comfort Condition of Passengers in Naturally Ventilated Train Stations

2019 ◽  
Vol 111 ◽  
pp. 02069
Author(s):  
Junta Nakano ◽  
Shin-ichi Tanabe
Keyword(s):  
Thermal Comfort ◽  
Indoor Environment ◽  
Environmental Control ◽  
Thermal Environment ◽  
Field Surveys ◽  
Train Station ◽  
Spot Cooling ◽  
Autumn And Winter ◽  
Indoor Comfort ◽  
Comfort Condition

Train is the most frequently used means of transportation in Tokyo. Train stations are gaining attention as commercial complex today, and higher level of comfort is being demanded for the indoor environment. Open structure of the train station and semi-outdoor like environment suggest that the thermal comfort condition is relaxed compared to indoor comfort standards. The objective of this study is to investigate the thermal comfort condition within train stations and to clarify the appropriate target for environmental control. Field surveys were carried out in summer, autumn and winter during July 2004 to August 2006 in four train stations located in urban area of Tokyo. Concourses were not air-conditioned except one station where spot cooling was operated in summer near the ticket gate. Each survey was conducted from 7:00 to 20:00 for 3 to 11 days per season per station for a total of 81 days. The survey consisted of thermal environment measurement and thermal comfort questionnaire. More than 80% of passengers felt thermally comfortable within the range of 19 to 29 °C SET*. However, acceptability zone was found to be 19 to 32 °C SET*, and it is recommended to design naturally ventilated train stations to fulfil this target.

scholarly journals Climatic, Cultural, Behavioural and Technical Influences on the Indoor Environment Quality and Their Relevance for a

2021 ◽  
pp. 201-214
Author(s):  
Edeltraud Haselsteiner ◽  
Marielle Ferreira Silva ◽  
Željka Kordej-De Villa
Keyword(s):  
Indoor Environment ◽  
Optimal Level ◽  
Rational Approach ◽  
Indoor Environmental Quality ◽  
Environment Quality ◽  
Scientific Disciplines ◽  
Indoor Environment Quality ◽  
Survey Results ◽  
Indoor Comfort ◽  
Temperature Heating

AbstractResearch about indoor comfort in future years will increasingly be guided by the pressing need for decarbonizing the built environment due to climate change. Health, efficiency, and satisfaction of work and the feeling of comfort are largely determined by the interior criteria. The sustainable indoor environment is a result of complex factors: air conditioning (ventilation), indoor temperature, heating methods, lighting, and acoustic. This chapter explores and analyzes climatic, cultural, and behavioral factors that play an important role and have an influence on technology for an indoor regenerative environment. This chapter is based on an explorative literature review and reflects indoor environmental quality, users’ expectations, and users’ behavior from the perspective of different scientific disciplines. Current standards are based on a rational approach to thermal comfort, and indicators are determined on the measured subjects’ reactions during stabilized conditions in climatic chambers. It is concluded from these results that people in different environmental conditions react similarly to everyday life. Nevertheless, survey results suggest that achieving the optimal level of the indoor environment is possible when climatic, cultural, and social context is taken into account.

Statistical Analysis of Influential Factors on Prognosis of Hydrocephalic Patients

1989 ◽  
pp. 115-117
Author(s):  
Satoshi Matsumoto ◽  
Takashi Tsubokawa ◽  
Yutaka Maki ◽  
Kiyoshi Satoh ◽  
Shouzou Ishii ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Influential Factors

scholarly journals Statistical Analysis of Indoor RSSI Read-outs for 433 MHz, 868 MHz, 2.4 GHz and 5 GHz ISM Bands

2017 ◽  
Vol 63 (1) ◽  
pp. 33-38 ◽  
Author(s):  
Łukasz Chruszczyk
Keyword(s):  
Statistical Analysis ◽  
Indoor Environment ◽  
Automatic Gain Control ◽  
Radio Channel ◽  
Low Cost ◽  
Gain Control ◽  
Indoor Location ◽  
Normal Probability ◽  
5 Ghz ◽  
Probability Density Function Pdf

Abstract This paper presents statistical analysis of RSSI read-outs recorded in indoor environment. Many papers concerning indoor location, based on RSSI measurement, assume its normal probability density function (PDF). This is partially excused by relation to PDF of radio-receiver's noise and/or together with influence of AWGN (average white Gaussian noise) radio-channel – generally modelled by normal PDF. Unfortunately, commercial (usually unknown) methods of RSSI calculations, typically as “side-effect” function of receiver's AGC (automatic gain control), results in PDF being far different from Gaussian PDF. This paper presents results of RSSI measurements in selected ISM bands: 433/868 MHz and 2.4/5 GHz. The measurements have been recorded using low-cost integrated RF modules (at 433/868 MHz and 2.4 GHz) and 802.11 WLAN access points (at 2.4/5 GHz). Then estimated PDF of collected data is shown and compared to normal (Gaussian) PDF.

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