Forensic geoscience non-invasive detection and characterisation of underground clandestine complexes, bunkers, tunnels and firing ranges.

Recent events in conflict zones have emphasized that the successful detection and characterisation of buried clandestine complexes, bunkers and tunnels is vitally important for forensic investigators globally, to reduce or solve criminal activities, address national security threats and avoid potential terrorist attacks. However, this can often prove very difficult, particularly in urban areas, with potentially both below-ground non target items and above-ground infrastructures present, that can interfere with detecting target(s). Here we provide selected successful case studies where forensic geoscience techniques were used to detect and characterise buried clandestine complexes, bunkers and tunnels using different geophysical techniques. Generally, desktop studies assessing pre-existing information, including local geology, soils, historical/modern remote sensing, maps and photographs inform appropriate geophysical survey technique(s) selection. Subsequent near-surface geophysical techniques are then employed to produce accurate plans of sub-surface targets, with numerical modelling and correction for the interfering effects of above ground infrastructure, enabling the calibration of geophysical datasets to provide confidence in their respective interpretations. All forensic investigations are, of course, unique to every site, and thus require an individual approach to their respective ground conditions. Investigations should be both phased and iterative, with techniques tailored to local conditions: the selection of geophysical method(s) is crucial to improve successful detection rates of such important buried targets.

Evaluation of patients' compliance to recall visits after tooth extraction at the Dental Centre, University of Benin Teaching Hospital (UBTH): A two-year retrospective study

ABSTRACT Objective: This study aims to evaluate the level of patients' compliance with recall / follow-up visits attending the dental Centre of the University of Benin Teaching Hospital (UBTH).Methods: This study adopted a descriptive retrospective study of case notes retrieved from the medical records department of the dental Centre, University of Benin Teaching Hospital. The period under study covers 2019 to 2021. The data was collected by means of 1232 questionnaire and analyzed using descriptive statistics such as frequency and percentages. Results: The result showed that the participants in the age bracket of 18-40 years of age (277) complied better to recall visit in comparison with the study age distributions which are 41-65 years (218) and age above 65 years (188). As per the influence of gender on compliance of patients with post-extraction recall visits, it was observed that the male participants (288) responded better to the recall visits compared to the female participants (251). The Relationship between distance away from the hospital and compliance of patients with post-extraction recall visits was also evaluated, and it was observed that the patients closer to the hospital within 5km (442) complied better to recall revisit in comparison to the participants who were within 10km (224) from the hospital as well as the participants that were 10km & above (17). Finally, the influence of interval between procedure and recall visit was also evaluated, and the result revealed that the participants that were given 7 days of recall revisit (663) complied better compared with the participants who were given 14days duration for recall revisit (478). Conclusion: The data from this study highlighted the possible need for a paradigm shift in patient-doctor interphase especially as it concerns recall visits. Compliance to recall appointment by the patients depends largely on age, gender, distance from hospital and interval between procedures and is mainly responsible for the noncompliance of patients to recall visit

A laparoscopic knot-tying device for minimally invasive cardiac surgery.

OBJECTIVE: Intracorporeal suturing and knot tying can complicate, prolong or preclude minimally invasive surgical procedures, reducing their advantages over conventional approaches. An automated knot-tying device has been developed to speed suture fixation during minimally invasive cardiac surgery while retaining the desirable characteristics of conventional hand-tied surgeon's knots: holding strength and visual and haptic feedback. A rotating slotted disc (at the instrument's distal end) automates overhand throws, thereby eliminating the need to manually pass one suture end through a loop in the opposing end. The electronic actuation of this disc produces left or right overhand knots as desired by the operator. METHODS: To evaluate the effectiveness of this technology, seven surgeons with varying laparoscopic experience tied knots within a simulated minimally invasive setting, using both the automated knot-tying tool and conventional laparoscopic tools. Suture types were 2/0 braided and 4/0 monofilament. RESULTS: Mean knot-tying times were 246+/-116 s and 102+/-46 s for conventional and automated methods, respectively, showing an average 56% reduction in time per surgeon (p=0.003, paired t-test). The peak holding strength of each knot (the force required to break the suture or loosen the knot) was measured using tensile-testing equipment. These peak holding strengths were normalised by the ultimate tensile strength of each suture type (57.5 N and 22.1N for 2/0 braided and 4/0 monofilament, respectively). Mean normalised holding strengths for all knots were 68.2% and 71.8% of ultimate tensile strength for conventional and automated methods, respectively (p=0.914, paired t-test). CONCLUSIONS: Experimental data reveal that the automated suturing device has great potential for advancing minimally invasive surgery: it significantly reduced knot-tying times while providing equivalent or greater holding strength than conventionally tied knots.

An exploration of prevalence of domestic violence in same-sex relationships.

The prevalence of domestic violence in a sample of 33 men and 33 women currently or previously in same-sex relationships was assessed. Data were collected through a mail survey in the state of Virginia. Of 1000 surveys sent out 66 usable ones were returned (response rate = 6.6%). Analysis indicated that 34 had experienced some form of domestic violence, but significant differences between male and female respondents were not detected. When data from this same-sex sample were compared with those of the heterosexual sample of the National Violence Against Women Survey, intimate partner assault may be more prevalent against gay men than against heterosexual men, but there was no significant difference between lesbians and heterosexual females.

Corporal punishment experiences and attitudes in a sample of college students.

This article describes an analysis of an exploratory survey administered to a sample of 123 college students. The purpose was twofold. First, the respondents' experiences with spanking in childhood are described. Second, factors that led respondents to perceive their childhood spankings as beneficial or not beneficial are examined.