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- Nimnath Withanachchi, Yasuo Uchida, Shyama Nanayakkara, D. B. D. L. Samaranayake, Akiko Okitsu
- Health policy
- 2007

The allocative inefficiency is a fundamental flaw in the public hospitals of the developing countries. The inefficiencies drain the limited public resources allotted for healthcare. Sri Lanka's public health system faces worsening budget constraints. The resource allocation practices of the Ministry of Health focus on increasing the cadre of hospital staff,… (More)

- Nimnath Withanachchi, Yasuo Uchida
- Health policy
- 2006

Sri Lanka's tax-financed public health system has played a significant role in achieving high levels of health status for its people. The 21st century brings new challenges in terms of rapidly aging population and increasing prevalence of NCDs. These challenges are expected to place a heavier burden on the government health financing and provision. However,… (More)

- Yasuo Uchida, Makoto Sakamoto, +7 authors Michio Kono
- Artificial Life and Robotics
- 2009

The question of whether processing three-dimensional digital patterns is much more difficult than two-dimensional ones is of great interest from both theoretical and practical standpoints. Recently, owing to advances in many application areas, such as computer vision, robotics, and so forth, it has become increasingly apparent that the study of… (More)

- Takao Ito, Makoto Sakamoto, +4 authors Michio Kono
- Artificial Life and Robotics
- 2010

The parallel Turing machine (PTM) proposed by Wiedermann is a set of identical usual sequential Turing machines (STMs) cooperating on two common tapes: storage tape and input tape. On the other hand, due to the advances in many application areas such as motion picture processing, computer animation, virtual reality systems, and so forth, it has become… (More)

- Yasuo Uchida, Makoto Sakamoto, +4 authors Satoshi Ikeda
- 2010

A multi-marker automaton is a finite automaton which keeps marks as pebbles in the finite control, and cannot rewrite any input symbols but can make marks on its input with the restriction that only a bounded number of these marks can exist at any given time. An improvement of picture recognizability of the finite automaton is the reason why the… (More)

- Makoto Sakamoto, Ryoju Katamune, +4 authors Yasuo Uchida
- 2010

The recent advances in computer animation, motion image processing, robotics and so on prompted us to analyze computational complexity of four-dimensional pattern processing. Thus, the research of four-dimensional automata as a computational model of four-dimensional pattern processing has also been meaningful. From this viewpoint, we introduced a… (More)

- Yasuo Uchida, Takao Ito, +6 authors Tsunehiro Yoshinaga
- Artificial Life and Robotics
- 2011

M. Blum and C. Hewitt first proposed two-dimensional automata as a computational model of two-dimensional pattern processing in 1967, and investigated their pattern recognition abilities. Since then, many researchers in this field have investigated many properties of automata on a two- or three-dimensional tape. However, the question of whether processing… (More)

- Makoto Nagatomo, Yasuo Uchida, +7 authors Hiroshi Furutani
- 2016

This paper presents a four-dimensional computational model, k-neighborhood template A-type three-dimensional bounded cellular acceptor (abbreviated as A-3BCA(k)), and discusses the hierarchical properties. An A-3BCA(k) is a four-dimensional automaton which consists of a pair of a converter and a configuration-reader. The former converts the given… (More)

- Makoto Sakamoto, Tomoya Matsukawa, +4 authors Yasuo Uchida
- 2010

Synchronized alternating machine is an alternating machine with a special subset of internal states called synchronizing states. This paper introduces a four-dimensional synchronized alternating Turing machine (4-SATM ), and investigates fundamental properties of 4-SATM ’s. The main topics of this paper are: (1) a relationship between the accepting powers… (More)

- Makoto Sakamoto, Tomoya Matsukawa, +6 authors Tomoya Matsukawa
- 2010

Synchronized alternating machine is an alternating machine with a special subset of internal states called synchronizing states. This paper introduces a four-dimensional synchronized alternating Turing machine (4-SATM ), and investigates fundamental properties of 4-SATM ’s. The main topics of this paper are: (1) a relationship between the accepting powers… (More)