著者

Baud Haryo Prananto Iskandar Adit Kurniawan

出版者

The Institute of Electronics, Information and Communication Engineers

雑誌

IEICE Communications Express (ISSN:21870136)

巻号頁・発行日

vol.12, no.1, pp.19-23, 2023-01-01 (Released:2023-01-01)

参考文献数

4

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Handover is very crucial in cellular communication since it may interrupt data transmission. The traditional handover algorithm works well in ideal conditions, but it may fail in certain conditions such as coverage holes. In this letter, we present our simulation to improve handover performance using machine learning. We implement and perform novel modifications on Near-RT RIC, a new network element by O-RAN, to solve the target cell decision problem using a machine learning algorithm in a network with a coverage hole. We show that this solution is proven superior to the traditional handover algorithm.

著者

Ferry Iskandar Erlandy Dwinanto Mikrajuddin Abdullah Khairurrijal Oki Muraza

出版者

Hosokawa Powder Technology Foundation

雑誌

KONA Powder and Particle Journal (ISSN:02884534)

巻号頁・発行日

vol.33, pp.3-16, 2016 (Released:2016-02-28)

参考文献数

82

被引用文献数

5 34

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Enhanced oil recovery (EOR) in the last several years has become an important factor in oil production due to the shortfall in high quality crude oil. Heavy oil as one of the unconventional hydrocarbons is still vastly abundant in nature and is hence frequently explored with EOR. The viscous characteristic of heavy oil necessitates further in-situ upgrading processes to be executed before extraction. An interesting upgrading method is through aquathermolysis under the addition of catalyst. This review focuses on presenting nanoparticle catalysts, such as nickel-, iron- and cobalt-based nanocatalyst. The explanation covers topics from synthesis methods and characterization up to the effect of reducing the viscosity of heavy oil. Lastly, concluding remarks and future perspectives are highlighted regarding the visibility and available approaches of developing nanofluids for EOR.

著者

脇田 浩二 宮崎 一博 ソパヘルワカン J. ズルカルナイン I. パーキンソン C.D. ムナスリ Koji Wakita Kazuhiro Miyazaki Jan Sopaheluwakan Iskandar Zulkarnain Christopher D. Parkinson Munasri Geological Survey of Japan Geological Survey of Japan Research and Development Centre for Geotechnology Research and Development Centre for Geotechnology Tokyo Institute of Technology Tsukuba University

出版者

日本地質学会

雑誌

地質学論集 = The memoirs of the Geological Society of Japan (ISSN:03858545)

巻号頁・発行日

vol.48, pp.152-162, 1997-06-30

参考文献数

14

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東南アジアの古大陸スンダランドの周りには, 様々な年代の付加体やゴンドワナ大陸起源の微小大陸片が集まってきて, 中生代・新生代を通じて次第に大陸成長を続けてきた。インドネシアの中部ジャワ, 南スラウェシ及び南カリマンタン地域において付加体の詳細な調査研究の結果, 白亜紀における海洋プレートの沈み込み, 深海堆積物の付加, 微小大陸片の衝突などが次第に明らかになってきた。これらの三池域の地質は, 構成岩相や地質時代などがお互いに良く類似している。しかし, それぞれの地域が受けた構造運動の違いが, 構成岩石の性質に微妙な違いを与えている。中部ジャワのルクロコンプレックスは, 典型的な付加体で, 白亜紀全体を通じて定常的な海洋プレートの沈み込みと海洋堆積物の付加で特徴づけられている。南カリマンタンのメラトスコンプレックスは, その被覆層とともに収束境界に沿った島弧で形成されたと推定される。一方, 南スラウェシのバンティマラコンプレックスは, 海洋プレートの沈み込みに引き続いて起こった微小大陸片の衝突の歴史を記録している。The Sundaland craton in Southeast Asia is surrounded by a number of accretionary complexes of various ages, and accreted microcontinents which were originally rifted from the Gondwanaland. Continental growth along the southern and eastern margins of the Sundaland resulted from accretion of sediments and collision of continental fragments throughout Mesozoic and Cenozoic times. Cretaceous tectonic processes in the Indonesian region such as subduction, accretion and collision have been revealed by detailed geologic investigation of accretionary complexes in Central Java, South Sulawesi and South Kalimantan. The components of these complexes are similar to each other, but the precise nature of the components differs somewhat. Differences of structure and lithology suggest differing tectonic histories. The Luk-Ulo Complex of Central Java is a typical subduction complex generated by continuous subduction of oceanic plate through out Cretaceous time. The Meratus Complex and its overlying formations in South Kalimantan are also products of oceanic plate subduction in an island arc setting. On the other hand, the Bantimala Complex of South Sulawesi records the effects of oceanic plate subduction followed by collision of a continental fragment.