Stabilisation of tetragonal FeCo structure with high magnetic anisotropy by the addition of V and N elements

The development of magnetic materials with high saturation magnetization (M-s) and uniaxial magnetic anisotropy (K-u) is required for the realisation of high-performance permanent magnets capable of reducing the power consumption of motors and data storage devices. Although FeCo-based materials with the body-centred cubic structure (bcc) exhibit the highest M-s values among various transition metal alloys, their low K-u magnitudes makes them unsuitable for permanent magnets. Recent first-principles calculations and experimental studies revealed that the epitaxial FeCo thin films with the body-centred tetragonal (bct) structure and thicknesses of several nanometres exhibited K-u values of 10(6) J.m(-3) due to epitaxial stress, which required further stabilisation. In this work, the FeCo lattice stabilised via VN addition were characterised by high K-u magnitudes exceeding 10(6) J.m(-3). The obtained bct structure remained stable even for the films with thicknesses of 100 nm deposited on an amorphous substrate, suggesting its possible use in bulk systems

Usefulness and limitation of laparoscopic assisted hepatic resections: a preliminary report

Background/Aims: We preliminarily examined the characteristics of patients who underwent laparoscopic assisted hepatic resection (LAPH) to clarify its advantages and limitations of this procedure. Methodology: We examined the demographics, surgical records and outcome in 9 patients undergoing LAPH between 2001 and 2007 by comparing results in 15 patients (control group) who did not undergo laparoscopy before 2000. Results: By comparing the control group, patient demographics were not different. Four patients underwent left lateral sectionectomy and others underwent partial hepatectomy. One patient needed combined resection of abdominal wall and left lateral sector because of direct invasion from a liver tumor. There was no remarkable morbidity or mortality in all patients. Mean operation time in the LAPH group was significantly longer than that in the control group (356+/-68 vs. 276+A59 minutes) (p=O.015), particularly in patients undergoing partial resection. Blood loss was not different between groups. Days of use of pain reliever and hospital stay in the LAPH group was significantly shorter than that in the control group (pO.OOl). These tendencies were similar in each operative procedure. Conclusions: LAPH can be safely performed even in patients with chronic liver injury and recovery of patients from operation was faster than that by conventional hepatectomy

A comparative study of the sarcopenia screening in older patients with interstitial lung disease

Background: The Asian Working Group for Sarcopenia 2019 (AWGS 2019) is the gold standard diagnostic criteria for sarcopenia in Asian populations. The calf circumference (CalF), the strength, assistance in walking, rising from a chair, climbing stairs, and falls (SARC-F) and the SARC-CalF questionnaires for sarcopenia screening have been used by AWGS 2019. The aim of this study was to assess accuracy of these three sarcopenia screening tools in patients with interstitial lung disease.Methods: In this cross-sectional study, stable patients with interstitial lung disease were enrolled. The SARC-F, SARC-CalF, and CalF, used in patients with interstitial lung disease, were compared to the diagnostic criteria proposed by AWGS 2019. The accuracy of screening tools was compared using sensitivity and specificity. Moreover, areas under the receiver operating characteristic curves (AUC) were computed.Results: Seventy eight patients were analyzed, and sarcopenia was identified in 25 (32.1%) patients with interstitial lung disease by the AWGS 2019 criteria. The sensitivity of the CalF was highest (96%) of the three screening tools, while the specificity was 60%. The sensitivity of SARC-F and SARC-CalF were 24% and 68%, while the specificity were 92% and 66%, respectively. The AUCs of CalF, SARC-F, and SARC-CalF in all patients were 0.78, 0.58, and 0.67, respectively.Conclusions: The CalF is most suitable for screening sarcopenia in patients with interstitial lung disease, while SARC-F and SARC-CalF are not