Article
Energy & Fuels
Jente Pauwels, Sonia Salah, Mirela Vasile, Ben Laenen, Valerie Cappuyns
Summary: Geothermal energy extraction can lead to scale formation which causes clogging in the system and reduces efficiency. Analysis of scaling material from the Balmatt geothermal site revealed the presence of galena and other minerals, along with radionuclides. Equilibrium calculations suggest that galena is one of the main oversaturated minerals in the scaling material.
Article
Anthropology
Robert M. Rosenswig
Summary: The internal control and external sovereignty of nation-states have a long history, but these concepts are often under-theorized and insufficiently operationalized in ancient societies without written records. A network of kingdoms along the Pacific coast of Mexico, Guatemala, and El Salvador reveals a three-tiered political hierarchy and confirms the 30 km rule for spacing sovereign polities.
AMERICAN ANTHROPOLOGIST
(2021)
Article
Environmental Sciences
Takahito Ikenoue, Masato Takehara, Kazuya Morooka, Eitaro Kurihara, Ryu Takami, Nobuyoshi Ishii, Natsumi Kudo, Satoshi Utsunomiya
Summary: Highly radioactive particles found in the marine environment near the Fukushima Daiichi Nuclear Power Plant were examined, revealing their potential origin from the nuclear accident and their role in transporting concentrated Cs radioactivity. These particles have various colloidal and desorption properties that significantly impact the movement of radioactive Cs in the marine environment.
Article
Environmental Sciences
Naoko Murakami-Sugihara, Kotaro Shirai, Hirofumi Tazoe, Kaoruko Mizukawa, Hideshige Takada, Takeyasu Yamagata, Shigeyoshi Otosaka, Hiroshi Ogawa
Summary: The study examined the temporal and spatial dynamics of radiocesium in mussel tissue collected from the Pacific coast of Tohoku from 2011 to 2015. It was found that the fluctuation of 137Cs concentration in mussel tissue reflects the 137Cs concentration in suspended particles in seawater. The results suggest that mussel tissue can be a sensitive indicator of radiocesium concentration in the environment.
MARINE POLLUTION BULLETIN
(2021)
Article
Geosciences, Multidisciplinary
Seiji Tsuno
Summary: In this study, an on-site P-wave earthquake early warning method based on site-specific spectral ratio of S-wave to P-wave was developed to efficiently issue earthquake warnings by incorporating site characteristics. The method showed good predictions for moderate-sized earthquakes in eastern Japan, but had limitations in predicting ground motions induced by large-scaled earthquakes.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Anthropology
Madonna L. Moss, Brittany Bingham, Raven Blankenship, Upuli DeSilva, Ryan Frome, Marie Capps, Joy Li, Erica Palmer, Krithivasan Sankaranarayanan, Brian M. Kemp
Summary: This study used ancient DNA analysis to identify eight rockfish species in Coffman Cove, Alaska, shedding light on Tlingit fishing practices and the potential misidentifications in morphological identification. The study also emphasizes the importance of studying sculpins and understanding the historical ecology of long-lived rockfish species vulnerable to overfishing along the Pacific Coast.
ARCHAEOLOGICAL AND ANTHROPOLOGICAL SCIENCES
(2022)
Article
Multidisciplinary Sciences
Ken Ishida, Michikusa Tachibana, Masakazu Hori, Takehiro Okuda, Tomoko Yamamoto, Masahiro Nakaoka, Takashi Noda
Summary: Long-term patterns in community trajectories provide insights into ecological resilience, but require extensive census data. The stable trajectory was most common, with varying features and recovery rates among regions, while trajectories and temporal invariabilities also differed among regions seemingly linked to ocean current fluctuations.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
Kazutoshi Yoshitake, Gaku Kimura, Tomoko Sakami, Tsuyoshi Watanabe, Yukiko Taniuchi, Shigeho Kakehi, Akira Kuwata, Haruyo Yamaguchi, Takafumi Kataoka, Masanobu Kawachi, Kazuho Ikeo, Engkong Tan, Yoji Igarashi, Masafumi Ohtsubo, Shugo Watabe, Yutaka Suzuki, Shuichi Asakawa, Sonoko Ishino, Kosuke Tashiro, Yoshizumi Ishino, Takanori Kobayashi, Katsuhiko Mineta, Takashi Gojobori
Summary: This study conducted regular seawater sampling along the northeastern Pacific coast of Japan and developed the Ocean Monitoring Database, which provides a comprehensive view of marine microbial communities. By employing various sequencing methods and developing novel classification techniques, the study revealed important insights into marine microbiomes, which may lead to significant discoveries in the field.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
Irina Pugach, Alexander Hubner, Hsiao-chun Hung, Matthias Meyer, Mike T. Carson, Mark Stoneking
Summary: Research has shown that humans reached the Mariana Islands around 3,500 years ago with unique ocean voyaging capabilities. Uncertainties still exist regarding the origin of the first Mariana settlers and their relationship with Polynesian settlers.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Fisheries
Qinghuan Zhu, Rui Wu, Yoshio Masuda, Yutaro Takahashi, Kyu Okabe, Koji Koizumi, Atsuko Iida, Satoshi Katayama
Summary: In this study, larval and juvenile Japanese anchovy were collected from five coastal waters off the Pacific coast of Japan in 2020 and 2021. The results showed that the spawning period of Japanese anchovy was related to temperature and chlorophyll-a concentrations, with latitudinal gradient variation among fishing areas. The growth of Japanese anchovy displayed a significant positive allometric pattern, with a quick and accelerating initial stage of growth.
Article
Multidisciplinary Sciences
Takefumi Yorisue
Summary: In this study, the genotypes of Balanus glandula in different intertidal zones in Japan were examined, revealing a similar genetic cline in introduced areas as in the native range. The data from this study provide an important baseline for future monitoring of this species.
Article
Oceanography
Hiroshi Kuroda, Takahiro Tanaka, Sayaka Ito, Takashi Setou
Summary: A high-resolution ocean model was developed to simulate tides and tidal currents around Hokkaido, Japan, accurately reproducing observed oceanographic conditions. The study found that dominant diurnal tidal currents were generated mainly by coastal-trapped waves along the Hokkaido coast, with the first-mode CTWs being generated near the Four Islands and propagating towards Cape Erimo. Additionally, the interaction of different tidal currents around Cape Erimo led to varying strengths and directions of currents, with the K-1 currents being weaker than the O-1 currents by one order of magnitude. Furthermore, the unsteadiness of the tidal currents gradually increased along the propagation route, especially on the shelf west of the cape due to superposition with unstable CTWs.
CONTINENTAL SHELF RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
El Noh, Joowan Kim, Sang-Yoon Jun, Dong-Hyun Cha, Myung-Sook Park, Joo-Hong Kim, Hyeong-Gyu Kim
Summary: The study found that during positive PJ pattern events, stations in Korea and Japan recorded approximately a 90% increase in extremely hot days (T-max > 35 degrees C), and horizontal heat advection is a key factor for the observed near-surface warming.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Multidisciplinary Sciences
Takefumi Yorisue
Summary: This study investigated the distribution and genetic genotypes of the barnacle Balanus glandula in Japan. The results showed that the native genotypes are still abundant at all sampling sites, and latitude and tide levels do not significantly impact genotypic frequencies. Additionally, no changes in genotype composition were observed over a 15-year period.
Article
Geochemistry & Geophysics
Kosuke Ota, Yusuke Yokoyama, Yosuke Miyairi, Jun Hayakawa, Naomi Satoh, Hideki Fukuda, Kiyoshi Tanaka
Summary: The study suggests that analyzing radiocarbon in abalone shells can help reconstruct past seawater conditions in northern Japan, particularly in cases where coral skeletons are not available for ocean mixing studies.
Article
Chemistry, Analytical
Tomoko Ohta, Junji Torimoto, Takumi Kubota, Yasunori Mahara
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2016)
Article
Geochemistry & Geophysics
Yasunori Mahara, Tomoko Ohta, Noritoshi Morikawa, Takanori Nakano, Minoru Tokumasu, Satoshi Hukutani, Tomochika Tokunaga, Toshifumi Igarashi
APPLIED GEOCHEMISTRY
(2014)
Article
Nuclear Science & Technology
Yuji Shibahara, Takumi Kubota, Toshiyuki Fujii, Satoshi Fukutani, Tomoko Ohta, Koichi Takamiya, Ryo Okumura, Satoshi Mizuno, Hajimu Yamana
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
(2014)
Article
Chemistry, Analytical
T. Kubota, S. Fukutani, T. Ohta, Y. Mahara
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2013)
Article
Chemistry, Analytical
Y. Shibahara, T. Kubota, T. Fujii, S. Fukutani, T. Ohta, K. Takamiya, R. Okumura, S. Mizuno, H. Yamana
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2015)
Article
Chemistry, Analytical
Takumi Kubota, Yuji Shibahara, Satoshi Fukutani, Toshiyuki Fujii, Tomoko Ohta, Munehiko Kowatari, Satoshi Mizuno, Koichi Takamiya, Hajimu Yamana
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2015)
Article
Instruments & Instrumentation
T. Ohta, Y. Mahara, T. Kubota, T. Abe, H. Matsueda, T. Tokunaga, S. Sekimoto, K. Takamiya, S. Fukutani, H. Matsuzaki
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2013)
Article
Instruments & Instrumentation
Yasunori Mahara, Tomoko Ohta, Tomochika Tokunaga, Hiroyuki Matsuzaki, Keisuke Nagao, Eiji Nakata, Yuki Miyamoto, Takumi Kubota
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2013)
Article
Multidisciplinary Sciences
Yasunori Mahara, Tomoko Ohta, Hideki Ogawa, Atsushi Kumata
SCIENTIFIC REPORTS
(2014)
Article
Chemistry, Multidisciplinary
Aiping Zhu, Mitsuyo Saito, Shin-ichi Onodera, Yuta Shimizu, Guangzhe Jin, Tomoko Ohta, Jianyao Chen
Article
Instruments & Instrumentation
Yasunori Mahara, Tomoko Ohta
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2019)
Article
Geochemistry & Geophysics
K. Nakata, T. Hasegawa, D. K. Solomon, K. Miyakawa, Y. Tomioka, T. Ohta, T. Matsumoto, K. Hama, T. Iwatsuki, M. Ono, A. Marui
APPLIED GEOCHEMISTRY
(2019)
Article
Geochemistry & Geophysics
Tamas Varga, Laszlo Palcsu, Tomoko Ohta, Yasunori Mahara, A. J. Timothy Jull, Mihaly Molnar
Article
Engineering, Civil
Tomoko Ohta, Takuma Hasegawa, Kotaro Nakata, Yuichi Tomioka, Takuya Matsumoto, Yasunori Mahara
JOURNAL OF HYDROLOGY
(2019)
Article
Multidisciplinary Sciences
Yasunori Mahara, Tomoko Ohta, Jyunichi Ohshima, Kazuya Iizuka
Summary: The study estimated the depth at which roots of coniferous and deciduous trees actively absorb soil water to be 20 cm, and found that water circulation in heartwood was significantly slower than in sapwood.
SCIENTIFIC REPORTS
(2021)
