Search Results - "Okubo, Shuhei"

Advances in gravity analyses for studying volcanoes and earthquakes by OKUBO, Shuhei

“…This report highlights the usefulness and applicability of various gravimetric methods for studying earthquakes and volcanic activities. A high-resolution…”
Get full text

General formulations of global co-seismic deformations caused by an arbitrary dislocation in a spherically symmetric earth model-applicable to deformed earth surface and space-fixed point by Sun, Wenke, Okubo, Shuhei, Fu, Guangyu, Araya, Akito

“…Based on the authors' previous work, co-seismic deformations for a spherical symmetric earth model are summarized and reformulated. Unified expressions…”
Get full text

Non-aneurysmal ascending aorta diameter changes after aortic valve replacement in patients with stenotic bicuspid and tricuspid aortic valve by Hiraoka, Toshifumi, Furukawa, Tomokuni, Mochizuki, Shingo, Okubo, Shuhei, Go, Seimei, Yamada, Kazunori, Takahashi, Shinya

“…Objective The appropriate timing of aortic repair in patients with bicuspid aortic valve-related aortopathy remains controversial. We describe the changes in…”
Get full text

Valve‐sparing partial root repair for aortic dissection limited to the right coronary sinus of Valsalva by Furuta, Akihisa, Morimoto, Hironobu, Mukai, Shogo, Futagami, Daisuke, Okubo, Shuhei

“…Background and aim of the study To reveal a technical feasibility and safety of valve‐sparing partial aortic root repair for spontaneous aortic dissection…”
Get full text

Impact of the size mismatch between saphenous vein graft and coronary artery on graft patency by Yamane, Yoshitaka, Uchida, Naomichi, Okubo, Shuhei, Morimoto, Hironobu, Mukai, Shogo

“…Background The saphenous vein graft (SVG) is widely used in coronary artery bypass grafting because of its availability and ease of use. However, the patency…”
Get full text

Temporal gravity anomalies observed in the Tokai area and a possible relationship with slow slips by Tanaka, Yoshiyuki, Suzuki, Takehito, Imanishi, Yuichi, Okubo, Shuhei, Zhang, Xinlin, Ando, Miwako, Watanabe, Atsushi, Saka, Mamoru, Kato, Chiaki, Oomori, Shuichi, Hiraoka, Yoshifumi

“…The water in Earth’s mantle is closely related with plate subduction and volcanism. Recent studies revealed that the mantle wedge corner at approximately 30 km…”
Get full text

Gravity and GPS measurements reveal mass loss beneath the Tibetan Plateau: Geodetic evidence of increasing crustal thickness by Sun, Wenke, Wang, Qi, Li, Hui, Wang, Yong, Okubo, Shuhei, Shao, Desheng, Liu, Dongzhi, Fu, Guangyu

“…Today, some tens of million years after its creation by the collision between India and Asia, the Tibetan Plateau is the highest and largest plateau on Earth…”
Get full text

Patch Repair for a Subepicardial Aneurysm With an Approach From Inside the Heart by Yamane, Yoshitaka, MD, Mukai, Shogo, MD, Morimoto, Hironobu, MD, Koshiyama, Hiroshi, MD, Okubo, Shuhei, MD

“…We present a case of subepicardial aneurysm that developed as a complication of acute myocardial infarction. Although the patient had stable hemodynamics, the…”
Get full text

A Network of Superconducting Gravimeters Detects Submicrogal Coseismic Gravity Changes by Imanishi, Yuichi, Sato, Tadahiro, Higashi, Toshihiro, Sun, Wenke, Okubo, Shuhei

“…With high-resolution continuous gravity recordings from a regional network of superconducting gravimeters, we have detected permanent changes in gravity…”
Get full text

Coseismic deformations detectable by satellite gravity missions: A case study of Alaska (1964, 2002) and Hokkaido (2003) earthquakes in the spectral domain by Sun, Wenke, Okubo, Shuhei

“…Coseismic deformations observed on the Earth surface or modeled by conventional dislocation theory cannot be compared directly with those observed by gravity…”
Get full text

Coseismic gravity and displacement changes of Japan Tohoku earthquake (Mw 9.0) by Xinlin Zhang, Shuhei Okubo, Yoshiyuki Tanaka, Hui Li

“…The greatest earthquake in the modern history of Japan and probably the fourth greatest in the last 100 years in the world occurred on March 11, 2011 off the…”
Get full text

Effects of earth's spherical curvature and radial heterogeneity in dislocation studies—for a point dislocation by Sun, Wenke, Okubo, Shuhei

“…To the present, dislocation theories for a homogeneous half‐space are often used to calculate or interpret displacements and gravity changes caused by an…”
Get full text

Gravity variation around Shinmoe-dake volcano from February 2011 through March 2012—Results of continuous absolute gravity observation and repeated hybrid gravity measurements by Okubo, Shuhei, Tanaka, Yoshiyuki, Ueki, Sadato, Oshima, Hiromitsu, Maekawa, Tokumitsu, Imanishi, Yuichi

“…We report here on continuous absolute gravity measurements made between February 2011 and March 2012 and repeated relative gravity measurements in the vicinity…”
Get full text

Right Atrial Calcified Ball Thrombus Mimicking a Myxoma by Yamane, Yoshitaka, MD, Morimoto, Hironobu, MD, Okubo, Shuhei, MD, Koshiyama, Hiroshi, MD, Mukai, Shogo, MD

“…An 80-year-old woman was admitted to our hospital because of congestive heart failure. Transthoracic echocardiography revealed severe aortic valve stenosis,…”
Get full text

Ascending Aortic False Aneurysm Formation Associated with Rupture of Acute Type A Aortic Dissection by Yamane, Yoshitaka, Mukai, Shogo, Morimoto, Hironobu, Okubo, Shuhei

“…A 63-year-old man with ruptured acute type A aortic dissection was referred to our hospital. Computed tomography showed a false aneurysm arising from the false…”
Get full text

Acute Aortic Insufficiency due to the Avulsion of Aortic Valve Commissure;Report of a Case by Furuta, Akihisa, Morimoto, Hironobu, Mukai, Shogo, Futagami, Daisuke, Okubo, Shuhei, Goto, Kenji

“…A 61-year-old man with a history of hypertension and cerebral infarction, presented to a clinic with sudden dyspnea at rest. He was diagnosed with heart…”
Get more information

Spatiotemporal gravity changes at Miyakejima Volcano, Japan: Caldera collapse, explosive eruptions and magma movement by Furuya, Masato, Okubo, Shuhei, Sun, Wenke, Tanaka, Yoshiyuki, Oikawa, Jun, Watanabe, Hidefumi, Maekawa, Tokumitsu

“…Calderas are ubiquitous topographic features of volcanos, yet caldera formation itself has not been recorded intensively by modern measurement techniques. Here…”
Get full text

Internal deformation caused by a point dislocation in a uniform elastic sphere by Takagi, Yu, Okubo, Shuhei

Get full text

Surface potential and gravity changes due to internal dislocations in a spherical earth—II. Application to a finite fault by Sun, Wenke, Okubo, Shuhei

“…We present a numerical formulation for computing elastic deformations caused by a dislocation on a finite plane in a spherically symmetric earth. It is based…”
Get full text

A Reinvestigation of Crustal Thickness in the Tibetan Plateau Using Absolute Gravity, GPS and GRACE Data by Sun, Wenke, Wang, Qi, Li, Hui, Wang, Yong, Okubo, Shuhei

“…The geodetic evidence of the uplift and crustal thickness of the Tibetan Plateau has been presented for the first time (Sun et al. 2009) using gravity and GPS…”
Get full text