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Lowland Technology International
Published by International Association of Lowland Technology
ISSN : 13449656     EISSN : 21878870     DOI : https://doi.org/10.0001/ialt_lti
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Engineering Transportation
The Lowland Technology International Journal presents activity and research developments in Geotechnical Engineering, Water Resources Engineering, Structural Engineering, Transportation Engineering, Urban Planning, Coastal Engineering, Disaster Prevention and Mitigation Engineering.
Arjuna Subject : Teknik (semua kategori) - Teknik Sipil dan Struktur
Articles 6 Documents
 1 
Search results for , issue "Vol 21 No 2, Sep (2019)" : 6 Documents clear
The The Study on Age-Friendly Environments for an Improvement of Quality of Life for Elderly, Asian Mega City, Thailand P. Iamtrakul; S. Chayphong; J. Klaylee
Lowland Technology International Vol 21 No 2, Sep (2019)
Publisher : International Association of Lowland Technology

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Abstract

With the global trends of urbanization and aging population, more focus about the design of age-friendly environments to improve quality of life for our residents aged of 60 years and more is increasing. The pursuit of healthy, productive, and purposeful aging must become a priority for all communities, especially in Asian megacity, Thailand. In order to enable living environment for older people as a resource for their families, communities and economies, the complex infrastructure and social context must be unfolded. Thus, this study attempted to understand the health related problem of age groups among difference life styles and neighborhood characteristics toward the appropriate recommendation of an age-friendly city by conducting the site investigation together with questionnaire survey. The total 1,000 sets of older people were interviewed by working closely with authorities from Banpaew district of Samutsakorn Province, Thailand. By adopt the technique of focus groups among caregivers and service providers in the public, voluntary and private sectors, the in-depth interview could be executed and comprehended. The results from the focus groups led to a guideline development for age-friendly city improvement. Finally, an ultimate aim of recommendation for longevity urban environment could be promoted to encourage active ageing by optimizing opportunities for health, participation and security in order to enhance quality of life.
Influence Of Thermal Experience On Thermal Comfort In Naturally Conditioned University Classrooms J. Y. Shen; S. Kojima; X. Y. Ying; X. J. Hu
Lowland Technology International Vol 21 No 2, Sep (2019)
Publisher : International Association of Lowland Technology

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Abstract

This study aimed to investigate the relevance of thermal experience on students’ thermal perceptions in the naturally conditioned university classrooms, and identified the suitable values of indoor thermal parameters for students’ thermal comfort in Southeast China. Field measurements on environmental parameters and questionnaire surveys of students’ thermal perceptions were conducted in the whole duration of twelve lectures in summer and winter. Thermal perceptions of TSV, TAV and TPV were recorded 3 times (15min, 45min, 95min) within each survey. It was found that, the indoor thermal conditions for students were more comfortable and acceptable in summer than in winter. Positive correlation of thermal sensation and indoor operative temperature occurred in summer, while negative correlation occurred within the indoor operative temperature range of 9.8~15.3℃ in winter, and only when the initial temperature was upon 15.7℃, could the normal response of students’ thermal sensation on the ambient environment return back. Thermal memory will make impact on the thermal perception as the on-site temperatures lose their control of current thermal response gradually, especially under the extremely cold thermal conditions. Meanwhile, TSV, TAV and TPV were unsynchronized in both summer and winter, especially in winter.
Improvement of Hydro-Meteorological Products and Services in Viet Nam: Situation Appraisal and Policy Recommendation Application N. Quang T. Thuy; N. D. Quang; D. Q. Tri; B. M. Ha; H. P. Cuong; D. V. Trong; H. D. Cuong
Lowland Technology International Vol 21 No 2, Sep (2019)
Publisher : International Association of Lowland Technology

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Abstract

Rapidly developing tropical countries such as Viet Nam are experiencing a rapid demand for hydro-meteorological information services. Evaluation of end-users’ demands is one way to inform policy development for organizations such as the Viet Nam Meteorological and Hydrological Administration so that they can provide the most relevant and useful products and services to the diverse and evolving market. An initial interview survey was conducted across 18 provinces and cities in Viet Nam between October and November 2017 to elicit information that would improve understanding of end-users’ perception of the importance of hydro-meteorological information, the quality and utility of current products and services, and expectations for development of hydro-meteorological information over the near future. The results indicated that the contents of the bulletins or the speed of access on TV or the website of the National Center for Hydro-meteorological Forecasting) need to be improved to meet the needs of the wide range of users. Furthermore, the end-users will be happy to pay if the information is accurate and timely. Experience from this initial survey will be used to expand the interview survey to the national scale, covering all 63 provinces and 5 centrally-controlled municipalities, and to increase the range of stakeholders’ participation.
Correlation Between Shear Wave Velocity and Liquefaction Resistance For Sandy Soils With A Shearing History Using Cyclic Tri-Axial Tests G. J. Liu; N. Yasufuku; R. Ishikura
Lowland Technology International Vol 21 No 2, Sep (2019)
Publisher : International Association of Lowland Technology

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Abstract

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Prediction of Uplift Capacity of Belled-type Pile with Shallow Foundation in Sandy Ground J-G. Kang; N. Yasufuku; R. Ishikura; A. Y. Purnama
Lowland Technology International Vol 21 No 2, Sep (2019)
Publisher : International Association of Lowland Technology

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Abstract

This paper describes a semi-empirical model for predicting the uplift resistance of a belled-type pile considering the relative density of the ground. The variable parameters were utilized in the model are the pile length, the diameter of pile tip, the diameter of pile, and the angle of internal friction in the ground. Moreover, the inclination angle of pile tip and the relative density of the ground, which are not studied in the previous researches, were considered. In this study, an experimental model was conducted with various conditions such as the relative density of the ground and the inclination angle of pile tip those are designated to determine the failure surface of the ground. Based on results, a new model which can be applied to the belled-type pile was proposed by improving the limit equilibrium equation in the previous models. In addition, to confirm the reliability of the newly proposed a model of limit equilibrium equation of the belled-type pile, the models which are presented in the previous studies were compared with the proposed model. Consequently, the proposed model in this study correspond the higher reliability in comparison with the previous models.
Strength Improvement of Cement Stabilized Soil by Binder Mineral Additive T. Harianto; F. Sitepu; Jasrudin .
Lowland Technology International Vol 21 No 2, Sep (2019)
Publisher : International Association of Lowland Technology

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Abstract

The stability of the underlying soil significantly influences pavement construction for long-term performance. Subgrades often have a low bearing capacity in order to achieve adequate capacity under traffic loading. This study presents the strength and bearing capacity of the road pavement by utilization of a binder mineral powder for soil-cement stabilization. The Unconfined Compression Test (UCT) and California Bearing Ratio (CBR) test conducted at optimum moisture content (OMC) and maximum dry density (MDD). The dry-wet cycle (D-W) test also conducted to observe the strength behavior of the stabilized soil. The results show that the mix of the binder mineral and soil-cement, resulting in higher strength and bearing capacity. The strength characteristics of stabilized soil with binder mineral tend to decrease for the initial cycle slightly. In contrast to untreated soil, the strength significantly decreased by subjected to the wet-dry cycle test. These characteristics change of stabilized soil may lead to potential using of binder mineral as an additive for soil-cement stabilized.

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