Kaonic nuclear clusters- a new paradigm of particle and nuclear physics.

Λ = Λ(1405) plays an essential role in the formation of kaonic nuclear clusters (KNC). The simplest KNC, Kpp, has the structure Λp = (Kp)p, in which a real kaon migrates between two nucleons, mediating super-strong Λp attraction. Production data of Kpp have been accumulated by DISTO, J-PARC E27 and J-PARC E15 experiments.

Investigation on luminescence photoswitching stability in diarylethene-perovskite quantum dot hybrids.

Perovskite quantum dots (pQDs) have gathered a lot of attention because of their outstanding optoelectronic properties. Photoswitchable pQDs have the potential for application in single particle optical memories and bio-imaging. Hybrids of photochromic diarylethenes (DAE) and pQDs show a luminescence photoswitching property, however, the cycle stability in such systems is low because of photoinduced electron transfer (PET) from pQDs to DAE.

A photoelectrochemical capacitor using polyoxometalates coupled with semiconductor nanocrystals as the photosensitizer.

Solar energy storage technology ensures a sustainable and reliable energy supply. Herein, we show that electrons generated in semiconductor nanocrystals (NCs) of CsPbBr by visible light excitation can be stored in polyoxometalates (POMs) of WO, and extracted as an electric current using a photoelectrochemical cell.

Mixed-methods study of medical students' attitudes toward peer physical examinations in Japan.

Background: Most Japanese medical schools likely continue to rely on peer physical examination (PPE) as a tool to for teaching physical examination skills to students. However, the attitudes of medical students in Japan toward PPEs have not be identified. Therefore, we evaluated students' attitudes toward PPE in a Japanese medical school as a preparation for developing a PPE policy tailored to the context of Japanese culture.

Elucidation of the needs for telecritical care services in Japan: a qualitative study.

Objective: To clarify the reasons for consultation, advice sought by frontline physicians and relationship between the patient's pathology and the type of advice provided to guide the future development of telecritical care services.

Design: Secondary analysis of transcripts of telephone calls originally recorded for quality control purposes was conducted using a thematic content analysis. The calls were conducted between December 2019 and April 2021 (total cases: 70; total time: ~15 hour).

Association between Grit and depressive symptoms at the timing of job start among medical residents during the COVID-19 pandemic in Japan: a cross-sectional study.

Introduction: The COVID-19 pandemic had an additional negative impact on the mental health of healthcare workers, including residents. Previous studies revealed that grit, which is an individual trait to achieve long-term goals unrelated to intelligence quotient, is not only positively associated with academic achievement and career success but also negatively correlated with depression. This study aimed to examine the association between grit and depressive symptoms among residents at the time of job start during the coronavirus disease 2019 (COVID-19) pandemic in Japan.

Light-Stimulated Luminescence Control of Lead Halide-Based Perovskite Nanocrystals Coupled with Photochromic Molecules via Electron and Energy Transfer.

Photoswitchable nanomaterials are key materials in the development of advanced imaging techniques, such as super-resolution fluorescence microscopy. The combination of perovskite CsPbBr nanocrystals (NCs) with bright photoluminescence (PL) emission and diarylethenes (DAEs) with structural changes in response to ultraviolet (UV) and visible light is a promising candidate system. Herein, CsPbBr NCs are coupled with photochromic DAE molecules to control the PL emission from the NCs by light stimulation.

Validity evidence of a task trainer for normal and difficult lumbar puncture: A cross-sectional study.

Validation of the anatomically complex configurations of the Lumbar Puncture Simulator II (KYOTO KAGAKU CO., LTD., 15 Kitanekoya-cho Fushimi-ku Kyoto, Japan 612-8388) have not been reported.

Reversible ON/OFF switching of photoluminescence from CsPbX quantum dots coated with silica using photochromic diarylethene.

Highly luminescent silica-coated CsPbX3 quantum dots (QDs) with good photostability were synthesized and coupled with photochromic diarylethene to modulate the QDs' photoluminescence (PL). Upon successive UV and visible light irradiation, the PL emission from the silica-coated CsPbX3 QDs was repeatedly quenched and restored, demonstrating the promising feasibility of the QD/diarylethene-based photoswitches.

Analysis of Λ(1405) production data in the πp → KπΣ reaction at p = 1.69 GeV/c.

We have been studying the (Σπ) mass distribution based on data from an old Hydrogen Bubble Chamber collected by Thomas et al. concerning the p(π, K)Σπ reaction at p = 1.69 GeV/c.

Synthesis of Cu₂O/CuO Nanocrystals and Their Application to H₂S Sensing.

Semiconducting metal oxide nanocrystals are an important class of materials that have versatile applications because of their useful properties and high stability. Here, we developed a simple route to synthesize nanocrystals (NCs) of copper oxides such as Cu₂O and CuO using a hot-soap method, and applied them to H₂S sensing. Cu₂O NCs were synthesized by simply heating a copper precursor in oleylamine in the presence of diol at 160 °C under an Ar flow.

Reliability of Cancer Treatment Information on the Internet: Observational Study.

Background: Finding the correct medical information in a flood of information from the internet is a significant issue for patients with cancer.

Objective: We investigated the reliability of the information on cancer treatment methods available on the internet based on an evaluation by medical oncologists, medical students, and cancer survivors.

Methods: Using Google and Yahoo as the search engines, we carried out the information search using 2 keywords, "cancer treatment" and "cancer cure," and the top 20 information sites were identified.

Evaluation of the rapid influenza detection tests GOLD SIGN FLU and Quick Navi-Flu for the detection of influenza A and B virus antigens in adults during the influenza season.

As the characteristics and accuracy of rapid influenza detection tests (RIDTs) vary, the development of a high-performance RIDT has been eagerly anticipated. In this study, the new RIDT GOLD SIGN FLU and the existing RIDT Quick Navi-Flu were evaluated in terms of detecting the antigens of influenza viruses A and B in Japanese adults with influenza-like symptoms. The study was performed from December 2013 to March 2014.

How do case presentation teaching methods affect learning outcomes?--SNAPPS and the One-Minute preceptor.

Background: Various techniques have been developed to enable preceptors to teach residents effectively in outpatient settings to promote active learning, including SNAPPS and the One-Minute Preceptor (OMP). This study aimed to ascertain the differences between SNAPPS and the OMP in case presentation content and learner evaluation when used to teach residents about case presentation.

Methods: From 2011 to 2013, participants were 71 junior clinical residents employed in two hospitals for clinical training.

Validity of direct ophthalmoscopy skill evaluation with ocular fundus examination simulators.

Objective: We examined how direct ophthalmoscopy (DO) skills can be evaluated in a clinical setting using a simulator, and determined the appropriate assessment criteria for the DO skills in practical tests such as the Objective Structured Clinical Examination (OSCE).

Design: Cross-sectional study.

Participants: Medical students, residents, and attending physicians (73 total participants).

Strong binding and shrinkage of single and double (K) nuclear systems (K(-)pp, K(-)ppn, K(-)K(-)p and K(-)K(-)pp) predicted by Faddeev-Yakubovsky calculations.

Non-relativistic Faddeev and Faddeev-Yakubovsky calculations were made for K(-)pp, K(-)ppn, K(-)K(-)p and K(-)K(-)pp kaonic nuclear clusters, where the quasi bound states were treated as bound states by employing real separable potential models for the K(-)-K(-) and the K(-)-nucleon interactions as well as for the nucleon-nucleon interaction. The binding energies and spatial shrinkages of these states, obtained for various values of the K interaction, were found to increase rapidly with the K interaction strength. Their behaviors are shown in a reference diagram, where possible changes by varying the K interaction in the dense nuclear medium are given.

Gender role stereotype and poor working condition pose obstacles for female doctors to stay in full-time employment: alumnae survey from two private medical schools in Japan.

The shortage of physicians has become a serious problem in Japan. It has been pointed out that an increase in the number of female doctors may contribute to the aggravation of this shortage because it is known that women work fewer hours than male doctors. Here, we investigated how many female doctors had ever resigned from a full-time position, and elucidated the reasons why female doctors find it difficult to stay in full-time employment.

New way to produce dense double-antikaonic dibaryon system, KKNN, through Λ(1405)-doorway sticking in p+p collisions.

A recent successful observation of a dense and deeply bound K nuclear system, K-pp, in the p+p→K++K-pp reaction in a DISTO experiment indicates that the double-K dibaryon, K-K-pp, which was predicted to be a dense nuclear system, can also be formed in p+p collisions. We find theoretically that the K--K- repulsion plays no significant role in reducing the density and binding energy of K-K-pp and that, when two Λ(1405) resonances are produced simultaneously in a short-range p+p collision, they act as doorways to copious formation of K-K-pp, if and only if K-K-pp is a dense object, as predicted.

Three-body forces and the limit of oxygen isotopes.

The limit of neutron-rich nuclei, the neutron drip line, evolves regularly from light to medium-mass nuclei except for a striking anomaly in the oxygen isotopes. This anomaly is not reproduced in shell-model calculations derived from microscopic two-nucleon forces. Here, we present the first microscopic explanation of the oxygen anomaly based on three-nucleon forces that have been established in few-body systems.

Kaonic nuclear systems KN and KNN as decaying states.

The formation spectra of model KN and KNN systems formed by (K(-),n) reactions are investigated in order to obtain a theoretical basis for a proper interpretation of experimental data concerning kaonic nuclear quasi-bound states. It has been clarified that the experimentally observable kaonic nuclear state K(-)pp should be regarded as the decaying state introduced by Kapur-Peierls, which is different from the pole state solution of the Faddeev equation.

Super strong nuclear force caused by migrating K̄ mesons - Revival of the Heitler-London-Heisenberg scheme in kaonic nuclear clusters.

We have studied the structure of K (-) pp comprehensively by solving this threebody system in a variational method, starting from the Ansatz that the Λ(1405) resonance (≡Λ (*)) is a K (-) p bound state. The structure of K (-) pp reveals a molecular feature, namely, the K (-) in Λ (*) as an "atomic center" plays a key role in producing strong covalent bonding with the other proton. We point out that strongly bound K̄ nuclear systems are formed by "super strong" nuclear force due to migrating real bosonic particles K̄ a la Heitler-London-Heisenberg, whereas the normal nuclear force is caused by mediating virtual mesons.

[Clinical features and prognosis of terminally ill patients in a geriatric long-term care hospital with particular regard to the implications of artificial nutrition].

Aim: To clarify the clinical features of terminally ill patients in our hospital and elucidate the implications of administering artificial nutrition.

Methods: Between April 2004 and March 2005, we assessed 155 patients who died in Nishimaruyama Hospital--a geriatric long-term care facility in Sapporo. We analyzed their clinical backgrounds on admission, the clinical course up to the terminal stage of the illness, and the outcome of patients who received artificial nutrition.