24 research outputs found
Development of video tests for elementary school physical education to assess pupil’s ability to think and judge: Utilization of simultaneously reproduced four-split screen videos
This study is a follow-up report of a study by Osedo et al. (2018), wherein a video test in which pupils “think and judge” based on the knowledge gained in physical education classes was developed. In this study, we developed a new video test that simultaneously reproduces video images with two technical differences on a four-split screen. We then administered a survey to third grade students to examine whether there were any differences in their viewpoints when observing the video.
The results from an analysis of the data suggest that if a teacher wants his or her students to “think and judge” based on the observation of physical exercise from several viewpoints, a four-split screen video acts as a teaching material that requires more comprehensive “thinking and judging” as compared to Osedo et al.’s (2018) test. However, because of the increase in the number of video images, students may have developed dispersed observation viewpoints; therefore, a further examination of developmentally appropriate utilization methods is necessary.本研究は,日本学術振興会科研費の助成(16K01619)を受けたものです
Three Dimensional Magnetohydrodynamical Simulations of Core Collapse Supernova
We show three-dimensional magnetohydrodynamical simulations of core collapse
supernova in which the progenitor has magnetic fields inclined to the rotation
axis. The simulations employed a simple empirical equation of state in which
the pressure of degenerate gas is approximated by piecewise polytropes for
simplicity. Neither energy loss due to neutrino is taken into account for
simplicity. The simulations start from the stage of dynamical collapse of an
iron core. The dynamical collapse halts at = 189 ms by the pressure of
high density gas and a proto-neutron star (PNS) forms. The evolution of PNS was
followed about 40 milli-seconds in typical models. When the initial rotation is
mildly fast and the initial magnetic fields are mildly strong, bipolar jets are
launched from an upper atmosphere () of the PNS. The jets
are accelerated to km s, which is comparable to
the escape velocity at the foot point. The jets are parallel to the initial
rotation axis. Before the launch of the jets, magnetic fields are twisted by
rotation of the PNS. The twisted magnetic fields form torus-shape multi-layers
in which the azimuthal component changes alternately. The formation of magnetic
multi-layers is due to the initial condition in which the magnetic fields are
inclined with respect to the rotation axis. The energy of the jet depends only
weakly on the initial magnetic field assumed. When the initial magnetic fields
are weaker, the time lag is longer between the PNS formation and jet ejection.
It is also shown that the time lag is related to the Alfv\'en transit time.
Although the nearly spherical prompt shock propagates outward in our
simulations, it is ...Comment: 41 pages, 24 figures, 4 tables, accepted for publication in ApJ. The
high resolution version is available at
http://www.astro.phys.s.chiba-u.ac.jp/~mikami/research
Compartment Syndrome after Prostatectomy
Robot-assisted laparoscopic prostatectomy (RALP) for prostate cancer was introduced in 2000 and rapidly gained popularity. The Da Vinci Surgical System® can ensure improved local control of cancer and fewer perioperative complications. However, RALP is performed in the steep-Trendelenburg position (a combination of lithotomy and head-down tilt position / Lloyd-Davies position) to obtain a good surgical view, and as a result, well leg compartment syndrome (WLCS) can become a serious complication of RALP. Here, we report a case of WLCS after RALP. A 75-year-old man underwent surgery for prostate cancer and immediately complained of pain and numbness after surgery. The pressure of the four leg compartments increased. Ultimately, we diagnosed the patient with WLCS in his right leg, and an emergency fasciotomy was performed. He completely recovered with no permanent disability and was discharged one month after rehabilitation. Although WLCS after RALP is a rare and severe complication, the patient recovered completely with early diagnosis and intervention. Measuring the compartment pressure is useful when the patient is drowsy immediately after recovery from anesthesia. Preventing WLCS requires identifying this condition as a potential complication of RALP and all urologic surgeries performed in the lithotomy position
Primary leiomyoma of the bladder
The case presented is of a 47-year-old patient with an extravesical pedunculated bladder leiomyoma, which was difficult to distinguish from a retroperitoneal tumor. Preoperatively, it was suspected to be a retroperitoneal tumor and a laparotomy with tumor resection was performed. lntraoperatively, the bladder and tumor were connected by a cord-like tissue. A retrospective review of preoperative images revealed that cord-like tissue, identified intraoperatively, was also present. Bladder leiomyomas can grow as extravesical pedunculated tumors. Therefore, when the continuity between the bladder and tumor is only a cord-like object, the finding of continuity is useful to diagnose with bladder leiomyoma
Preoperative Butyrylcholinesterase Level as an Independent Predictor of Overall Survival in Clear Cell Renal Cell Carcinoma Patients Treated with Nephrectomy
The prognostic factors for the overall survival (OS) of clear cell renal cell carcinoma (ccRCC) patients treated with nephrectomy are not well defined. In the present study, we investigated the prognostic significance of preoperative butyrylcholinesterase (BChE) levels in 400 ccRCC patients undergoing radical or partial nephrectomy from 1992 to 2013 at our institution. Univariate and multivariate analyses were performed to determine the clinical factors associated with OS. Among the enrolled patients, 302 were diagnosed with organ-confined disease only (T1-2N0M0), 16 with lymph node metastases, and 56 with distant metastases. The median preoperative BChE level was 250 U/L (normal range, 168–470 U/L), and median follow-up period was 36 months. The 3-year OS rate in patients with preoperative BChE levels of ≥100 U/L was significantly higher than in those with levels of <100 U/L (89.3% versus 77.7%, P=0.004). On univariate analysis, performance status; anemia; hypoalbuminemia; preoperative levels of BChE, corrected calcium, and C-reactive protein; and distant metastasis status were significantly associated with OS. Multivariate analysis revealed that preoperative BChE levels and distant metastasis status were significantly associated with OS. Our findings suggest a possible role of preoperative BChE levels as an independent predictor of OS after nephrectomy in ccRCC patients