Kyoto Prefectural Police

京都府育成の丹波黒ダイズ系エダマメ品種の機械収穫適性を向上させるため，2021～2022年の2年間，育苗用セルトレイ （トレイ） のサイズおよび育苗日数が下位着生莢の高さを左右する下位節間長に及ぼす影響を調査した．2021年は 「夏どり丹波黒2号」，「紫ずきん2号」，「紫ずきん3号」 および 「新丹波黒」 の4品種に，トレイ2水準 （128穴と200穴），育苗日数2水準 （10日間と14日間） の計3因子16区を設けて，調査結果を分散分析で解析した．移植時では，苗主茎長は因子の効果および交互作用の全てが有意であったが，下胚軸長は品種の効果のみが有意となった．収穫時では，第1節間長および第2節間長ともに品種および育苗日数の効果，品種と育苗日数の交互作用が有意となった．2022年は 「夏どり丹波黒2号」 および 「紫ずきん2号」 の2品種に，トレイと育苗日数の組み合わせを異にする育苗法4水準の計2因子8区を設けて分散分析で解析したところ，2021年と同様，育苗日数の延長により収穫時において第1節間長および第2節間長が有意に伸長した．一方，トレイの違いによる主茎への影響は育苗時のみに限られた．

原木段階における製材品の簡便な強度等級予測手法の開発を目的として，京都府産原木を対象に推定密度を用いた原木の強度等級判別によるラミナの強度等級予測の有効性を検証した。また，山土場における原木の強度等級判別コストについても検証した。その結果，原木の強度等級判別に推定密度を用いた場合，各強度等級のラミナの出現割合は実測密度を用いた場合と大差なかった。さらに，動的ヤング係数が9GPa以上の原木を選別することでL100のラミナの出現割合が1.6倍になるなど，ラミナ製造における原木段階での強度等級判別の有効性が確認できた。また，強度等級判別コストにより原木の購入単価は上がるものの，強度等級判別した原木を選択的に購入できるため，結果として原木の購入費用は強度等級判別しない場合と比較して約30％削減できた。以上のことから，推定密度を用いた原木の強度等級判別は，実用的かつ効果的な手法であると判断できる。

Hospital-at-home (HaH) care is useful for patients with COVID-19 and an alternative strategy when hospital capacity is under pressure due to patient surges. However, the efficacy and safety of HaH in elderly patients with COVID-19 remain unknown. In Kyoto city, we conducted a retrospective medical record review of HaH care focused on elderly COVID-19 patients from 4 February to 25 June 2021. Eligible patients were (1) COVID-19 patients aged ≥70 years and those who lived with them or (2) COVID-19 patients aged <70 years with special circumstances and those who lived with them. During the study period, 100 patients received HaH care. Their median age was 76 years (interquartile range 56–83), and 65% were over 70 years. Among 100 patients, 36 (36%) had hypoxia (oxygen saturation ≤ 92%), 21 (21%) received steroid medication, and 34 (34%) received intravenous fluids. Although 22 patients were admitted to the hospital and 3 patients died there, no patients died during HaH care. HaH care may be safe and effective in elderly patients with COVID-19. Our study shows that HaH provides an alternative strategy for treating COVID-19 patients and can reduce the healthcare burden at hospitals.

Age estimation by use of DNA methylation rate have recently been one of the hottest topics in forensic genetics, thus many age prediction models have been developed. The age prediction model developed by Bekaert et al was evaluated as the best method comparing six blood-based models in 2019. In this study, Bekaert's age estimation model was validated with 143 Japanese blood samples (98 living and 45 dead blood samples). The difference between duplicate measurement of DNA methylation rate with pyrosequencer was less than one-year per one-gene in age prediction result. Overall mean absolute error (MAE) was 3.24, and root mean square error (RMSE) was 4.13. MAE of the elder group was larger than that of the young group. No statistically significant difference in absolute prediction error was observed between living and deceased or male and female blood samples. Furthermore, a novel model was developed with support vector regression. The MAE and RMSE were 3.49 and 4.51 for test set, respectively. In total, 200 ng of pre-bisulfite-treated DNA was essential to perform these predictions. To reduce the required amount of DNA, new models based on only ELOVL2 methylation rate requiring only 40 ng of DNA were also developed. The MAE and RMSE were 3.15 and 4.20 for test set, respectively. These results suggest that both Bekaert's age estimation model and our novel model have great potential in estimating one's age on forensic practices with some points to note.

A new cyanide ion sensor with a large Stokes shift and a good fluorescence quantum yield was prepared.

Receiver operating characteristic (ROC) examination was performed to investigate the effectiveness of high-luminance monitors in digital X-ray mammography. For this purpose, an original breast phantom consisting of adipose and fibroglandular equivalent tissues with an identical X-ray absorption characteristic over the entire mammographic photon energy range was developed. Furthermore, the phantom’s fibroglandular density and distribution could be changed arbitrarily. Three types of lesions, microcalcification, mass, and spiculated, were inserted into the breast phantom, and the ROC examination was performed by five radiological technologists certified in screening mammography, to obtain the area under the curve. A liquid crystal display (LCD) monitor with 5 megapixels in a 21-inch display size calibrated to a grayscale standard display function curve was used for the observation. The monitor was set to 600, 900, and 1200 cd/m2 in maximum luminance. The experimental details were fibroglandular density of 25%, respective 50 positive and negative images, and free observation time and distance. As a result, the dependence on monitor luminance differed according to the lesion type. The detectability of microcalcification increased with the increase in the luminance of the monitor. Spiculated lesions were similar for all luminance changes. The detectability of mass lesions was significantly higher at 900 cd/m2 than at 600 cd/m2 . There was no significant difference between those at 900 cd/m2 and 1200 cd/m2 . In conclusion, the maximum luminance of the diagnostic LCD monitor for mammography should be at least 900 cd/m2 to guarantee stable detectability.

Recently, we can always shoot digital videos with smartphone and share them with family or friends after editing them. It is necessary to check whether they are tampered by someone or not, if we use these digital videos as forensic evidence in criminal investigation. This paper proposes a method for detecting tampered regions in a video where a specific subject is removed from a scene. In the proposed method, we use LSTM for the time domain analysis and U-Net for the space domain analysis. The detection accuracy achieved 0.98 in terms of F-measure, even though tampered region was deformed or moved in the video. The experimental results show superior performance to detect tampered regions for digital videos.

Generally speaking, most of the geomaterials in surface ground are in unsaturated state. The mechanical and hydraulic properties of unsaturated soil are much more complicated than those of saturated soil. To investigate these properties, it is important to conduct systematic experiments under various conditions. In this paper, triaxial compression tests on decomposed granite under drained/undrained condition were conducted. Two kinds of special loading conditions, that is, constant suction and constant degree of saturation were adopted during shear stage. Based on the test results, it is found that the drainage of Masado specimens influence its hydro-mechanical behaviors. It is also understood that the variation of suction and degree of saturation under drained condition cannot be described by existing water retention curve models, in which the influence of deformation was not considered. The test results are also helpful for the understanding of the moisture characteristics of the decomposed granite.