Ventralex オ モチイタ フクヘキ ハンコン ヘルニア シュウフクジュツ ノ 1 レイ

A 78-year-old woman underwent cystectomy of left ovary 1 year ago. She came to our hospital with the chief complaint of bulging of the abdominal scar before 2 months. The bulging of 3×3 cm was recognized in the operation scar in a standing position. CT scan of the abdomen revealed incisional hernia in upper part of operation wound. The hernia orifice was 2.5×2.5 cm. A radical operation was therefore performed. Under local anesthesia, Ventralex was fixed by insertion, and the hernia was repaired. The adhesion between the omentum and the caudal part of operation scar was dissected. In the condition patch was inserted and made to adhere to abdominal wall, strap was fixed in the rectus sheath. The postoperative course was good. Repair of incisional hernia using Ventralex seemed to be useful operative method, which could enforce the tension free operation in the minimum invasion

Testing the External Shock Model of Gamma-Ray Bursts using the Late-Time Simultaneous Optical and X-ray Afterglows

We study the ``normal'' decay phase of the X-ray afterglows of gamma-ray bursts (GRBs), which follows the shallow decay phase, using the events simultaneously observed in the R-band. The classical external shock model -- in which neither the delayed energy injection nor time-dependency of shock micro-physics is considered -- shows that the decay indices of the X-ray and R-band light curves, $\alpha_{\rm X}$ and $\alpha_{\rm O}$, obey a certain relation, and that in particular, $\alpha_{\rm O}-\alpha_{\rm X}$ should be larger than -1/4 unless the ambient density increases with the distance from the central engine. For our selected 14 samples, we have found that 4 events violate the limit at more than the 3$\sigma$ level, so that a fraction of events are outliers of the classical external shock model at the ``normal'' decay phase.Comment: Accepted for publication in ApJL. 12 page, 2 figures, 2 table

Lessons Learned in the Operation of the HIBARI: Variable Shape Satellite

We have developed the 50 kg microsatellite “HIBARI”. The satellite demonstrated a novel attitude control method called “Variable Shape Attitude Control (VSAC)”. VSAC is a method that can quickly control attitude and has low energy consumption using reaction torque by driving variable shape structures. HIBARI was launched in 2021 under the Innovative Satellite Technology Demonstration Program led by JAXA. We have been operating the satellite for two years and have demonstrated the VSAC mission. We achieved all minimum and full success criteria, including 30 deg/10sec agile attitude change. On the other hand, we experienced problems like the degradation of satellite components and other problems that could not be confirmed by ground tests. There was degradation of the paddle drive unit and influence of the paddles on bus components, which are unique to variable shape satellites. In addition, there was a case in which a paddle collided with the satellite structure due to an operational error. After the collision, the satellite’s integrity was evaluated by taking images of the paddle with the onboard camera and checking the telemetry data before and after the collision. During more than two years of operation, we have obtained knowledge about possible failures and countermeasures for satellites with variable shape structures

Genetic population structure of Hemigrammocypris rasborella (Cyprinidae) inferred from mtDNA sequences

The genetic population structure of the small cyprinid Hemigrammocypris rasborella, distributed widely in lowlands of western Japan, was examined using partial sequence data of mitochondrial DNA (mtDNA). Molecular phylogenetic analysis revealed that the populations of the western Kyushu region were markedly differentiated from all eastern populations, such that the groups would be comparable to different species; their divergence was inferred to have occurred in the Late Miocene–Pliocene. Also, a largely divergent mtDNA group (with divergence in the early Pleistocene) was found in the Sanyo and northeastern Shikoku regions, forming a secondary contact zone in the western Kinki with the eastern mtDNA group. To date, these aspects of the population structure of H. rasborella appear to be unique among lowland fishes in western Japan. Deeper understanding of the formation processes of freshwater faunas in western Japan will require further comparisons of the phylogeographic patterns and ecological traits of constituent species