The Influence of Responsibility Shift on Warehousing Performance: The Case of Australia

Vinh V. THAI,Vinh V. THAI,Zaheed HALIM 한국해운물류학회 2019 The Asian journal of shipping and Logistics Vol.35 No.1

Although there have been extensive efforts to eliminate the use of warehousing due to its large requirement of resources, the need to connect manufacturing with end consumers will be difficult to coordinate without it. In Australia, the rapid advance of warehousing has facilitated the challenging demands of customers. In the literature, the challenges of increasing reliability, space utilisation, and reducing waste have been managed through improved warehousing processes and technology; however, the important role of employees through responsibility shift in enhancing warehousing performance has not yet been fully explored. This study therefore examines the relationship between the employment of Responsibility Shift (RS) and Warehousing Performance (WP) in Australia within the processes of Inbounding and Storage through the usage of a survey conducted with department supervisors and managers of warehousing companies which were members of the Chartered Institute of Logistics and Transport in Australia (CILTA) and Supply Chain and Logistics Association of Australia (SCLAA). It was found that RS positively causes a statistically significant influence on warehousing performance. This research contributes to enrich the literature on RS as it is perhaps the first study which examines the effects of RS on warehousing performance in Australia while also enables warehousing managers to explore ways to improve warehousing performance from the human resource management perspective. Although being significant both in terms of managerial and academic implications, the generalizability of this research is limited from a small sample size. Future research, therefore, needs to look into a wider population as well as further investigation into the effects of Responsibility Shift in the rapidly developing warehousing business environment elsewhere in the world.

Local Stereo Matching Using an VariableWindow, Census Transform and an Edge-preserving Filter

Vinh Quang Dinh,Dung Duc Nguyen,Vinh Dinh Nguyen,Jae Wook Jeon 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10

In this paper, we propose an alternative blocking-matching approach to the correspondence problem in stereo matching. In blocking-matching algorithms, a local window is used to measure the similarity (or dissimilarity) between pixels of a stereo pair. Although some area-based stereo matching methods have been developed and work well in many kinds of regions such as textureless or object boundary regions, their performance can degrade when working in some types of radiometric conditions. Our proposed algorithm is an improved method that uses a non-parametric transform in the pre-processing step and an edge-preserving filter in the post-processing step. Input images are first pre-processed by the census transform, which makes the proposed method more robust when the image pair is captured in different light sources or camera exposure conditions. The window cost in our approach is computed from the transformed images using the Hamming distance, and the correspondence is finally chosen by a Winner-Takes-All strategy. The experimental results for the Middleburry images show that the proposed method outperforms test local stereo methods in radiometrically different images.

Fuzzy Encoding Pattern for Stereo Matching Cost

Dinh, Vinh Quang,Nguyen, Vinh Dinh,Van Nguyen, Hau,Jeon, Jae Wook IEEE 2016 IEEE Transactions on Circuits and Systems for Vide Vol.26 No.7

<P>We propose a novel fuzzy encoding pattern that fuzzily encodes the relative orders between pixel pairs. An image window is divided into disjoint neighboring pixel sets for the window's center pixel, and the relative order is established not only between the center pixel and its neighbors but also between the pixel pairs in each neighboring pixel set. The relative orders are fuzzily encoded to extract more detailed information from a local structure. We successfully apply the pattern as a matching cost function for stereo correspondence under severe radiometric variations. We conduct experiments using the proposed matching cost function and compare it with functions employing the census transform, supporting local binary pattern, and adaptive normalized cross correlation, as well as a mutual information-based matching cost function, using different stereo data sets. Compared with the census transform, the proposed function reduces the error from 33.1% to 16.9% in the Middlebury data set and from 17.6% to 9.5% in the Kitti data set. The experimental results indicate that the proposed function is superior to the state-of-the-art functions under radiometric variations. In addition, the proposed function is faster than recently developed functions, such as the adaptive normalized cross correlation, a mutual information-based function, and support local binary pattern.</P>

Shear resistance behaviors of a newly puzzle shape of crestbond rib shear connector: An experimental study

Thi Hai Vinh Chu,Duy Kien Dao,Duc Vinh Bui,Van Phuoc Nhan Le,김인태,안진희 국제구조공학회 2016 Steel and Composite Structures, An International J Vol.21 No.5

A newly puzzle shape of crestbond rib shear connector is a type of ductile perfobond rib shear connector. This shear connector has some advantages, including relatively easy rebar installation and cutting, as well as the higher shear resistance strength. Thus, this study proposed a newly puzzle shape of crestbond rib with a "Ʊ" shape, and its shear resistance behaviors and shear strengths were examined using push-out tests. Five main parameters were considered in the push-out specimens to evaluate the effects of shear resistance parameters such as the dimensions of the crestbond rib, transverse rebars in the crestbond dowel, concrete strength, rebar strength, and dowel action on the shear strength. The shear loading test results were used to compare the changes in the shear behaviors, failure modes, and shear strengths. It was found that the concrete strength and number of transverse rebars in the crestbond rib were significantly related to its shear resistance. After the initial bearing resistance behavior of the concrete dowel, a relative slip occurred in all the specimens. However, its rigid behavior to shear loading decreased the ductility of the shear connection. The cross-sectional area of the crestbond rib was also shown to have a minor effect on the shear resistance of the crestbond rib shear connector. The failure mechanism of the crestbond rib shear connector was complex, and included compression, shear, and tension. As a failure mode, a crack was initiated in the middle of the concrete slab in a vertical direction, and propagated with increasing shear load. Then, horizontal cracks occurred and propagated to the front and rear faces of the specimens. Based on the results of this study, a design shear strength equation was proposed and compared with previously suggested equations.

Improved Aerodynamic Data Fusion Techniques using Local Fidelity Method for Accurate Flight Simulation

Vinh Pham,Mu Kyeom Kim,LV Thang Nguyen,Ki Dong Lee,Maxim Tyan,Jae-Woo Lee 한국항공우주학회 2019 한국항공우주학회 학술발표회 논문집 Vol.2019 No.4

A Fast Evolutionary Algorithm for Real-Time Vehicle Detection

Vinh Dinh Nguyen,Thuy Tuong Nguyen,Dung Duc Nguyen,Sang Jun Lee,Jae Wook Jeon IEEE 2013 IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY Vol.62 No.6

<P>The evolutionary algorithm (EA) is an effective method for solving various problems because it can search through very large search spaces and can quickly come to nearly optimal solutions. However, existing EA-based methods for vehicle detection cannot achieve high performance because their fitness functions depend on sensitive information, such as edge or color information on the preceding vehicle. This paper focuses on improving the performance of existing evolutionary-based methods for vehicle detection by introducing an effective fitness function that can more accurately capture a vehicle's information by combining a disparity map, edge information, and the position and motion of the preceding vehicle. The proposed method can detect multiple vehicles by using a turn-back genetic algorithm (GA) and can prevent false detection by using motion detection. Our fitness function is designed in a typical manner along with the fitness parameters. These parameters are usually selected using heuristic methods, making the choice of optimal parameters difficult. Therefore, this paper proposes a new approach to estimating optimal fitness parameters using EA and the least squares method. Robustness testing showed that the proposed method provides detection rate (DR) results close to those obtained using a state-of-the-art system and outperforms other dominant vehicle-detection-based EAs.</P>

A Multilevel Kriging Modeling for Variable Fidelity Aerodynamic Database Construction

Vinh Pham,Mu Kyeom Kim,Maxim Tyan,Jae-Woo Lee 한국항공우주학회 2018 한국항공우주학회 학술발표회 논문집 Vol.2018 No.11

Data Fusion Technique for Noisy and Multi-fidelity Data Processing in Support of Accurate Flight Simulation

Vinh Pham,MuKyeom Kim(김무겸),Nadhie Juliawan,Maxim Tyan,Jae-Woo Lee(이재우),Sangho Kim(김상호) 한국항공우주학회 2019 한국항공우주학회 학술발표회 논문집 Vol.2019 No.11

Thermal interaction of a circular plate-ring structure using digital image correlation technique and infrared heating system

Vinh Tung Le,Ngoc San Ha,Tailie Jin,Nam Seo Goo,Jae Young Kim 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.9

During the high speed flight of vehicles, the thermal behavior and interactions of structures in a high-temperature environment are important for thermal-structural design. In this research, the thermal interaction behavior of a circular aluminum plate inside a stainless steel ring was investigated at temperature up to 550°C using a non-contact and full-field high-temperature deformation measurement method. This study uses an infrared radiation heating system to create a high-temperature operation environment. The techniques were developed and implemented in a radiation heating facility, enabling non-contact displacement, strain measurements through Digital image correlation (DIC) technique. The images of the structure surface due to thermal load at various temperatures were recorded with Chargedcoupled device cameras. Afterwards, full-field thermal deformation of the sample was determined with DIC technique. Finally, finite element analysis was used to calculate high-temperature deformation of the circular plate-ring structure. The results of the experiment were close to the simulation results. In addition, the process of both heating-up and cooling-down was also considered to examine the recoverable characteristic of the structure. The results show the efficacy of DIC in achieving such measurements at high-temperatures.

Competency Prole of Managers in the Singapore Logistics Industry

Vinh V. THAI,Khairunnisa Binte IBRAHIM,Vidya RAMANI,Hong-Yuan HUANG 한국해운물류학회 2012 The Asian journal of shipping and Logistics Vol.28 No.2

In this paper, we aim to explore what competencies are essential for logistics managers to be successful in the future by developing a conceptual framework of competency profile of logistics managers based on the existing BLM model and some newly proposed competencies, taking into account changes in the business environment. A survey was conducted in Singapore with logistics managers from 350 rms. A total of 52 returned questionnaires were received, representing a response rate of 14.8%. We found that the proposed framework of 103 business-, logistics- and management-related competencies are essential for logistics managers to be successful, although management-related competencies were perceived as more important than the others. Although being based on the existing BLM framework, this research also proposed and validated new competencies into the existing BLM framework to reect the necessary response to changes in the business environment. This research also contributes to management practice and serves as another effort to map out the critical competency prole for logistics managers of the future.