Articles

Translated Paper
Open access

Development of dynamic moisture content measurement system for wooden members exposed to fire heating

  •  31 March 2021

Abstract

A small sensor for the dynamic measurement of the local moisture content within a wooden member exposed to fire heating is developed. The measurement is based on the unique dependence of the electrical resistance of wood on moisture content and temperature. These relationships are observed experimentally for Cryptomeria japonica, Larix leptolepis, Pseudotsuga menziesii, and Zelkova serrata
Editorial
Open access

Recent trends of international validation and portability in Architectural Education

  •  265-266
  •  21 March 2021
Translated Paper
Open access

Study on image diagnosis of timber houses damaged by earthquake using deep learning

  •  20 March 2021

Abstract

The image processing (with deep learning, semantic segmentation, hough transformation, edge extraction) for the image diagnosis of timber houses damaged by earthquake was studied and verified. As a result, the following 3 aspects were revealed. 1. The usefulness of chroma keying for creating an image database for deep learning instead of real damaged images 2. The potential of the image diagnosis for not only qualitative damage assessment of timber houses but also quantitative one 3. The possibility of installation of drift ratio estimation into the image diagnosis.
Original Paper
Open access

Applicability of displacement ventilation and impinging jet ventilation system to heating operation

  •  403-416
  •  18 March 2021

Abstract

For DV, the temperature and contaminant distribution differed significantly depending on the supply conditions, while that of IJV remained almost the same. IJV can achieve better temperature distribution compared to DV, and it is almost the same as the mixing condition. However, depending on the supply condition, the ventilation effectiveness of DV was superior to that of IJV in some cases.
Original Paper
Open access

Correlations between building performances and design parameters of double‐skin facade utilizing perforated screen

  •  15 March 2021

Abstract

This study investigates the effect of a perforated sheet combined with a double‐skin facade by varying the important building parameters, such as perforation percentage, facade orientation, and the thickness of the double‐skin facade.
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The following is a list of the most cited articles based on citations published in the last three years, according to CrossRef.

Open access

Development of a window opening algorithm based on adaptive thermal comfort to predict occupant behavior in Japanese dwellings

  •  310-321
  •  21 June 2018

Abstract

We investigated window opening behaviour and thermal comfort in relation to the thermal environment over a period of 4 years in the living rooms and bedrooms of dwellings in the Kanto region of Japan. We collected 36 144 data samples from 243 residents of 120 dwellings. Both window‐opening and comfort temperature may be predicted from outdoor temperatures.
Open access

Experiences, accomplishments, lessons, and challenges of E‐defense—Tests using world's largest shaking table

  •  4-17
  •  16 January 2018

Abstract

E‐Defense, which is operated by the Japanese National Research Institute for Earth Science and Disaster Resilience, currently has the world's largest 3‐dimensional shaking table. This facility has already implemented over 80 full‐scale or large‐scale experiments since its operation commenced in 2005. This article highlights the major technical issues that have been encountered during the operation of E‐Defense and introduces the solutions that have been achieved.
Open access

Electricity load forecasting using clustering and ARIMA model for energy management in buildings

  •  62-76
  •  10 December 2019

Abstract

In this research, we proposed a method for forecasting the electricity load of university buildings using a hybrid model of clustering technique and autoregressive integrated moving average (ARIMA) model. The novel approach discussed in this paper includes clustering one whole year data including the forecasting day using K‐means clustering and using the result to forecast the electricity peak load of university buildings. The combination of clustering and ARIMA model has proved to increase the performance of forecasting rather than ARIMA model alone. This method can be used for energy conservation in buildings.
Open access

Control effect of large tuned mass damper used for seismic retrofitting of existing high‐rise building

  •  269-286
  •  5 June 2019

Abstract

Authors developed a large tuned mass damper (TMD) as a countermeasure against long period earthquake for existing high‐rise buildings. It was practically applied it to the 210 m high‐rise building and some observation records were obtained. This paper reports the response control performance of the TMD from the comparison between observation records and analytical results.
Open access

Exergetic approach to the understanding of built environment—state‐of‐the‐art review

  •  143-152
  •  19 March 2019

Abstract

This paper describes a state‐of‐the‐art review on exergy research focusing on the built environment. The very basic characteristics of warm and cool exergies developed as the rational extension of the exergy concept are first introduced and three typical examples of the application of warm and cool exergies are demonstrated: (a) exergetic evaluation of window systems; (b) human‐body exergy analyses; and (c) exergetic evaluation of a heat‐pump system.
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