著者

田口 真二

出版者

Japanese Association of Forensic Science and Technology

雑誌

日本法科学技術学会誌 (ISSN:18801323)

巻号頁・発行日

vol.20, no.2, pp.175-183, 2015

被引用文献数

2

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We selected a group of men who acknowledged sexual interest in prepubescent girls based on the Sexual Desire Scale for Males (SDS-M). Subjects were members of the general population aged 18 years and above who were not in prison (N=573). The relationship between acknowledging sexual interest in prepubescent girls and factors such as their experience of sexual offence, personality traits, cognition towards women and use of pornography were examined. It was estimated that 10% of survey subjects had acknowledged sexual interest in prepubescent girls. Statistical analysis showed that acknowledging sexual interest in prepubescent girls was significantly related to experience of sexual offence against women, some of sexual desire, some of personality traits and acceptance of sexual violence. A significantly higher proportion of men who acknowledged sexual interest in prepubescent girls had experience of sexual offence against women and of using child pornography compared to those who did not. The results of this study suggest that an understanding of sexual interest in prepubescent girls requires the perspectives of cultural and social learning.<br>

著者

藤田 和弘 貴田 明宏 稲垣 昭生

出版者

Japanese Association of Forensic Science and Technology

雑誌

日本法科学技術学会誌 (ISSN:18801323)

巻号頁・発行日

vol.11, no.1, pp.29-40, 2006

被引用文献数

4 2

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JPEG images are degraded by blocking artifacts and mosquito noise caused by quantization on the block DCT domain. The purpose of this paper is reduction of image quality degradation by means of the image restoration method instead of the smoothing method after the simple decoding. This proposed method is based on the edge-adaptive restoration method; the regularizing operator depends on the edge orientation, and the regularizing parameter depends on the local activity. The variance of the quantization on the block DCT domain is taken into consideration.

著者

Yoshiteru Marumo

出版者

Japanese Association of Forensic Science and Technology

雑誌

日本鑑識科学技術学会誌 (ISSN:13428713)

巻号頁・発行日

vol.7, no.2, pp.95-111, 2003 (Released:2009-04-11)

参考文献数

115

被引用文献数

6 11

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Soil can provide important information to criminal investigations as transfer evidence because many criminal cases take place under circumstances such that soil transfers to a criminal or victim. The variation in soils from place to place makes soil valuable evidence to prove linkage between a suspect and a crime scene. Soil is a complex mixture with a variety of mineralogical, chemical, biological, and physical properties. Considering such complexity, a variety of methods have been developed for forensic science purposes. Because minerals are an important component of soils, mineralogical examination is essential in forensic soil identification. Additionally, many other methods can be applied to raise the discriminating power, but not all kind of methods need to be used. What is important is that examiners select an appropriate combination of methods by considering the context of the soil samples. This report summarizes a wide range of reports on the analysis of soil components and of closely related materials such as plant fragments, pollen and spores, and diatoms, with emphasis on the importance of screening tests consisting of several simple techniques. The soil formation process involves parent materials, temperature, water condition, vegetation, time, and the chemical processes of solution, oxidation, reduction, and even human activities. The history of a soil's development as the results of such complex soil formation process is strongly reflected in soil color. The systematic observation of multiple soil colors is especially useful for screening.

著者

桐原 美穂 川端 三十一

出版者

Japanese Association of Forensic Science and Technology

雑誌

日本法科学技術学会誌 (ISSN:18801323)

巻号頁・発行日

vol.15, no.1, pp.59-64, 2010

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Cannabis seeds not pretreated for prevention of germination are on sale through the Internet in recent years. These seeds are illegal and show a high probability of germination. The number of arrestees, who had cultivated illegal Cannabis seeds, has increased year after year.<br>   Recently, we had an opportunity to examine Cannabis seeds. We carried out experiments for the proof of the germination abilities by usual and embryo-exposure techniques. The embryo-exposure technique is a speedy and effective method for germination of Cannabis seeds, especially for the weakened seeds.<br>   In this study, we have reported and recorded the course of germination, how to determine the germination and the growth process of Cannabis.<br>

著者

横田 賀英子 大塚 祐輔 倉石 宏樹 和智 妙子 渡邉 和美

出版者

Japanese Association of Forensic Science and Technology

雑誌

日本法科学技術学会誌 (ISSN:18801323)

巻号頁・発行日

vol.19, no.1, pp.19-30, 2014

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Characteristics of male offenders arrested in Japan for exhibitionism (<i>N</i> = 414) and features of their offences were investigated. In analyses, their behavioral consistency was also examined by focusing on 87 repeat exhibitionists. The results indicated that many offenders were well-adjusted persons: 71% were employed, 30% were married, and 23% were graduates. Moreover, 66% of the offences were committed in daytime, and 64% targeted victims aged 10-20 years. In 24% of cases, the distances between offenders' residences and crime scenes were less than one kilometer, whereas 40% of offenders lived over 5 kilometers away. In terms of behavioral consistency, offences in "trains or buses" and public spaces were shown to be consistent for repeated arrests, even after taking the occurrence rate into consideration by measures of adjusted standardized residual (ASR) and forward specialization coefficient (FSC), which is suggestive of behavioral consistency. Finally, less frequent behaviors, such as nighttime offences and offences targeting victims aged 30 years or older occurred less consistently in the series of offences. The results suggested that many exhibitionists rationally decided when and where to commit crimes, based on their calculation of risk and reward. The fact that many offenders were well-adjusted persons might be one of factors explaining offender's rational decision making. The findings in the current study can contribute to the police investigation to prioritize their investigative targets. The current research can form the basis of understanding of the nature of male exhibitionists.<br>

著者

Shinobu Hazama Satoshi Ichikawa Fumihiro Yonebayashi

出版者

Japanese Association of Forensic Science and Technology

雑誌

日本法科学技術学会誌 (ISSN:18801323)

巻号頁・発行日

vol.13, no.1, pp.67-72, 2008 (Released:2008-04-19)

参考文献数

13

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Enantioselective analysis of methamphetamine (MA) and amphetamine (AP) is necessary in forensic drug analysis. In general, standard materials are required for performing forensic investigation and also for developing new analytical methods. However, l-MA is not commercially available in Japan and only a few reports are available on the enantioselective synthesis of l-MA. We developed a new and convenient method for the synthesis of l-MA using d-norephedrine (d-NE) as a starting material. d-NE was treated with 1,1′-carbonyldiimidazole to produce the corresponding cyclic carbonate, and the product was treated with sodium hydride and iodomethane to form mono-N-methylated amine derivative, which was treated with palladium on activated carbon in hydrogen atmosphere for catalytic reduction. After the addition of aqueous hydrogen chloride (HCl), l-MA was obtained as its HCl salt (total yield 58%).

著者

伊藤 さよ 佐藤 高広 山下 珠希 鈴木 康弘

出版者

Japanese Association of Forensic Science and Technology

雑誌

日本法科学技術学会誌 (ISSN:18801323)

巻号頁・発行日

vol.19, no.2, pp.133-137, 2014

被引用文献数

1

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Glass fragments are valuable evidence in the criminal investigation of hit-and-run, murder and burglary cases. Screening of glass fragments should be carried out by refractive index (RI) measurement after the identification of unknown fragments of glass by analysis using electron probe microanalysis (EPMA), scanning electron microscopy with an energy dispersive X-ray spectrometer (SEM-EDS) and/or X-ray fluorescence spectrometry (XRF). However, it has been pointed out that RI values of glass fragments can be influenced by electron beam and/or X-ray of the instrumental analysis, although the effect of them on RI values of glass has not been sufficiently examined.<br>   In this work, we compared the RI values of glass fragments before and after irradiation by electron beam and/or X-ray using these devices. Glass fragments were collected from 3 different uses (windowpane of building, windshield and beer bottle). No significant difference was recognized in the RI values of these glass fragments before and after 30 minutes of irradiation.<br>   We have ascertained that the effect of electron beam and/or X-ray on the RI values is negligible in the conditions of the present study and that comparison of RI values is still useful for the forensic screening of glass fragments even after the instrumental analysis described above.<br>

著者

平川 俊介 案部 雄一郎 山下 珠希 内野 隆一郎 丸田 英基 才本 明秀 石松 隆和

出版者

Japanese Association of Forensic Science and Technology

雑誌

日本法科学技術学会誌 (ISSN:18801323)

巻号頁・発行日

2015

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Handgun bullets fired toward the windshield of an automobile sometimes ricochets. In such a case, we must estimate the type of bullet and direction of shooting from the damaged windshield. The purpose of this study is to obtain a method to estimate the fired direction of a handgun bullet from the fractured windshield. We test fired bullets to an automobile windshield with various incidence angles. The thickness of the windshield is slightly different from model to model of the automobiles. In the beginning, we examined the strength of the automobile windshield of various car models. First, we examined the static failure strength of the windshield by an indentation test. In this test, fracture load and the amount of indentation were measured on windshield samples cut from ten models of Japanese automobiles. Next, we test fired a handgun in order to examine the relation between the trajectory of a bullet and the collision marks on the windshield. The cartridges used in these test firings were 38SPL. lead round nose (LRN) bullet and full metal cased (FMC) bullet. In the results of static indentation test for different car models, there was found to be almost no differences in the relationship between fracture load and indentation depth. With the LRN bullet, bullets perforated the windshield when the incidence angle was less than 45 degrees and ricocheted when the incidence angle was greater than 60 degrees. In these cases, a characteristic damage was left on the windshield. On the other hand, FMC bullets of 38SPL. perforated the windshield when the incidence angle was less than 60 degrees and ricocheted when the incidence angle was greater than 70 degrees. Based on these results, we proposed a method to estimate the direction of shooting in criminal cases in which a bullet was fired on an automobile windshield.<br>

著者

岩本 良二 太田 奈穂樹 相場 伸 村川 雄大 棟方 栄治

出版者

Japanese Association of Forensic Science and Technology

雑誌

日本鑑識科学技術学会誌 (ISSN:13428713)

巻号頁・発行日

vol.6, no.2, pp.99-108, 2002

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This paper presents a study of the intra-individual variation of pubic hairs. Seventy pubic hairs were pulled from seven sites around the outer genital area of each of five Japanese males; sixty were obtained from six sites on each of four Japanese females, and fifty from six sites on one additional Japanese female. These hairs were examined with respect to twenty-two morphological characteristics. These morphological data were studied in relation to each site and analyzed by the statistical method of cluster analysis.<br>   It appeared that a pubic hair's length, luster, diameter, medullary index, disease and scale damage bore some relation to the site from which it was obtained. Dendrograms produced through the cluster analysis showed a hierarchy of similarities among all pairs of pubic hairs. Similar hairs were placed together into several large or small groups within the same person. Some groups contained pubic hairs from many sites, whereas others were almost exclusively from only one site. This means that some sites have different characteristics from other sites. Pubic hairs obtained from the penis area, scrotum and labium majus area showed greater dissimilarity than other sites within the same person.<br>   Therefore, in forensic hair comparison, known pubic hair samples should be obtained from many different sites. For males, at least thirty-five pubic hairs should be collected from seven sites (center, left and right abdomen; upper, left and right area surrounding the penis; and scrotum). For females, at least thirty pubic hairs should be collected from six sites (center, left and right abdomen; mons pubis; left and right labium majus).<br>

著者

山本 彰一 上田 啓太 能阿弥 昌昭 野上 靖生

出版者

Japanese Association of Forensic Science and Technology

雑誌

日本鑑識科学技術学会誌 (ISSN:13428713)

巻号頁・発行日

vol.5, no.1, pp.55-60, 2000

被引用文献数

1

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Ethanol concentrations in the coagulated blood of a bovine, a rabbit and a human were measured by using PY-GC/MS attached with a double-shot pyrolyzer (Model PY-2010D, Frontier Laboratories Ltd., Japan). Pyrolysis of samples was performed at 260°C, and the vapor evaporated from the sample was introduced into the GC/MS directly. For the control experiments, the concentrations of ethanol in both the heparinized bovine and rabbit blood, and homogenized human coagulated blood were measured by headspace-GC.<br>   The values of ethanol in the coagulated blood of the bovine, the rabbit and the human obtained by PY-GC/MS analysis were almost equal to that of the control experiments. These results indicated that the method using PY-GC/MS could be useful to the ethanol analysis of the coagulated blood in a practical case. In addition, the overall analytical time was about 10 minutes and the sample volume necessary for analysis was only 1 mg.<br>