All issues
Volume 27, Issue 2
Displaying 1-6 of 6 articles from this issue
- |<
- <
- 1
- >
- >|
-
Shin'ich TANABE, Ken'ichi KIMURA1991 Volume 27 Issue 2 Pages 65-72
Published: April 15, 1991
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSThe purpose of this study is to investigate thermal comfort requirements in the space with personal radiant heating system. During winter season warm air heating system often provides vertical temperature gradient. To create thermal comfort conditions and minimize individual differences, the personal radiant heating system may be one of the powerful tools. First, indoor thermal environments with warm air and radiant heating systems were compared. Secondly, 24 college-age female subjects wearing 0.67 clo standard clothing were exposed under office work activity (1.2 met) for 3 hours to four different thermal conditions. Experimental room is heated by totally 720W energy. Type 1 is heated only by 720W of warm air system. Type 2 is 480W of warm air and 240W of personal radiant heating. Type 3 is 240W of warm air and 480W of radiant panel. Type 4 is only 720W of radiant panel. Results shows that radiant heating system can create rather uniform temperature profile. However, when surface temperature become around 60°C, natural convection along the panel is increased and make around 0.3m/s air movement at sitting position and subjects may feel draught. Combination of warm air and personal radiant system with the view of thermal comfort was also discussed here.View full abstractDownload PDF (3805K) -
Akinori KOMATSUBARA1991 Volume 27 Issue 2 Pages 73-82
Published: April 15, 1991
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSSo as to promote the efficient menu selection in conversational type computer application systems, single-but group-structured menu retrieval system in which all selection items are displayed in a single menu but are grouped in their meaning is proposed in this study. Based on the user's cognitive activity at dealing with this system, it is hypothesized that number of groups should be set near to the square root of the product of the number of groups and the number of selection items in a group, and this grouping will give the most efficient selection time. Experiments were conducted to examine this hypothesis and the results which agreed with this hypothesis were obtained.View full abstractDownload PDF (1203K) -
Odor qualities of aromatic compoundsMasahiro OSAKO, Konosuke NISHIDA1991 Volume 27 Issue 2 Pages 83-95
Published: April 15, 1991
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSFirstly, sensory similarities of odor qualities between 22 aromatic compounds were factor-analyzed, and the relationships between factor loading matrix and physicochemical parameters were examined quantitatively by the multiple regression method. Parameters were selected such as the hydrophobic parameter π, electronic parameters Hammett's σm and σp, electronic parameter Swain-Lupton's F and R, and steric parameter MR (Molar Refraction).
Results.
(1) Aromatic compounds show a basic odor quality commonly, and it is modified by the physicochemical properties of the aromatic substituents.
(2) Odor hedonic is one of the standards for judging odor similarity.
(3) Odor qualities of monosubstituted benzenes consist of 2 main factors, the first correlates highly with saturated vapor pressure (it is referred to hydrophobic ability or solubility in lipids). While the second correlates highly with σm and σp, F and R, and MR (it is referred to electron donating and attracting ability, and the size of the substituents).View full abstractDownload PDF (1774K) -
Tsugutaka SADOYAMA1991 Volume 27 Issue 2 Pages 97-102
Published: April 15, 1991
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSIn 64 healthy male students the changes in muscle fiber conduction velocity in vastus lateralis was studied during isometric contractions at 50% of maximum force. Muscle fiber conduction velocity was measured with a surface electrode array placed along the muscle fibers and calculated from the time delay between 2 myoelectric signals. Mean values of conduction velocity decreased significantly from 4.3m/s to 4.1m/s with local muscle fatigue. This result suggests that muscular fatigue can be estimated from muscle fiber conduction velocity with surface electrodes.View full abstractDownload PDF (780K) -
On a task of pattern recognition requiring eyesight, thought and judgment with VDTs, and a task of choice of a correct answer from the three requiring knowledge and thought with VDTsKoki MIKAMI, Soichi IZUMI, Masaharu KUMASHIRO, Kazuo SAITO1991 Volume 27 Issue 2 Pages 103-114
Published: April 15, 1991
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSWomen's work adaptability to two tasks of the visual information processing type—a task of pattern recognition requiring eyesight, thought and judgment with VDTs, and a task of the choice of a correct answer from the three requiring knowledge and thought with VDTs—was examined compared with men's from the viewpoint of work load and work efficiencies.
The obtained results showed that women's work adaptability was higher in both tasks, and it was suggested that in this kind of work requiring thought women made economical effective production possible from the combined effects of learning effects in the working process, high durability of the cerebral cortical activity level and less behavior of escape from work.View full abstractDownload PDF (1710K) -
Atsuo MURATA1991 Volume 27 Issue 2 Pages 115-118
Published: April 15, 1991
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSDownload PDF (491K)
- |<
- <
- 1
- >
- >|