Hand Touch Research Articles

What is the relationship between body mass index and reaction speed in PPLOP boxing athletes in Central Java?

Background and Study Aim. Boxing requires an optimal balance between body weight and reaction speed. Body Mass Index (BMI) is a common measure used to assess body composition. For boxers, maintaining weight within the optimal range is crucial for peak performance. Additionally, reaction speed is a key skill in boxing; the ability to quickly respond to an opponent’s moves can significantly impact match outcomes. Material and Methods. This cross-sectional study utilized quantitative data analysis. Primary data included body weight, height, and reaction speed from a sample of 12 PPLOP Central Java boxing athletes. Data normality was assessed using the Shapiro-Wilk test, while the linearity test evaluated whether the relationships between variables were linear. Bivariate correlation tests were conducted. The study used Body Mass Index and Hand Touch Reaction tests with validity levels of 0.98 and 0.323, respectively, for measuring body weight, height, and reaction speed. Results. There is a relationship between body weight and reaction speed with a sig value of .003 <0.05 with a negative relationship direction. 2. there is no relationship between height and reaction speed with a sig value of (0.798>0.05) with a negative relationship direction, 3. there is a relationship between body mass index and reaction speed with a sig value of .001 <0.05 with a negative relationship direction Conclusion. Based on the results of the study it can be concluded that there is a linear relationship between body weight and reaction speed, there is no linear relationship between height and reaction speed and there is a linear relationship between body mass index and reaction speed.

COMFORTneo scale in preterm infants during live performed music therapy-Difference between close physical contact and hand touch contact.

There is evidence that music therapy combined with physical contact to parents stabilizes the vital signs of hospitalized preterm infants. Yet, there is no evidence for the difference between simple contact by touching the infant in the incubator or cod, or close physical contact during music therapy sessions (MT). Behavioral effects of the various forms of attention toward the infant during therapy need to be elucidated. Our study aimed to quantify the effects of hand touch contact (HTC) and close physical contact (CPC) during live performed MT in preterm infants regardless of gestational age on behavioral state (assessed via COMFORTneo scale) and vital signs. A maximum of ten live music therapy sessions were delivered three to four times a week until hospital discharge to 50 stable infants. Pre-, during- and post-therapy heart rates, respiratory rates, oxygen saturations and COMFORTneo scores were recorded for each session. A total of 486 sessions was performed with 243 sessions using HTC and CPC each. The mean gestational age was 33 + 3 weeks, with 27 (54%) infants being male. We observed lower COMFORTneo scores, heart and respiratory rates and higher oxygen saturation during and after live performed music therapy independent of the kind of physical contact than before therapy. While pre-therapy values were better in the CPC group for all four variables, a higher mean response on COMFORTneo scale and vital signs was observed for HTC (COMFORTneo score -5.5, heart rate -12.4 beats per min., respiratory rate -8.9 breaths per min, oxygen saturation + 1.5%) compared to CPC (COMFORTneo score -4.6, heart rate -9.6 beats per min., respiratory rate -7.0 breaths per min, oxygen saturation + 1.1%). Nonetheless, post-therapy values were better for all four measures in the CPC group. Regression modeling with correction for individual responses within each patient also yielded attenuated effects of MT in the CPC group compared to HTC, likely caused by the improved pre-therapy values. Live performed music therapy benefits preterm infants' vital signs and behavioral state. During CPC with a parent, the absolute therapeutic effect is attenuated but resulting post-therapy values are nonetheless better for both the COMFORTneo scale and vital signs.

Biomimetic Electronic Skin for Robots Aiming at Superior Dynamic-Static Perception and Material Cognition Based on Triboelectric-Piezoresistive Effects.

Empowering robots with tactile perception and even thinking as well as judgment capabilities similar to those of humans is an inevitable path for the development of future robots. Here, we propose a biomimetic electronic skin (BES) that truly serves and applies to robots to achieve superior dynamic-static perception and material cognition functionalities. First, the microstructured triboelectric and piezoresistive layers are fabricated by a facile template method followed by selected self-polymerization treatment, enabling BES with high sensitivity and a wide detection range. Further, through laminated-independent triboelectric and piezoresistive parts for perceiving dynamic and static pressures simultaneously, the BES is capable of supporting the robot hand to monitor the entire process during object grasping. Most importantly, by further combining a neural network model, an intelligent cognition system is constructed for real-time cognition of the object material species via one touch of the robot hand under arbitrary pressures, which goes beyond the human cognition ability.

Sensory function and somatosensorial system changes according to visual acuity and throwing techniques in goalball players: A cross-sectional study.

The somatosensory system is a complect sensory system that differentiates individual athletes. The aim of this study is to investigate the effect of visual acuity level on throwing technique, proprioceptive sense of the shoulder joint, light touch and two-point discrimination sense of the upper extremity, and sensory function (postural control and reaction time) in visually impaired goalball players. Goalball players who have different visual acuities B1(unable to perceive light or recognize its shape); B2 (has a visual field of less than 5 degrees and can recognize shapes); B3 (visual field greater than 5 degrees and less than 20 degrees) participated in the study. The sensorial system was evaluated with proprioceptive sense of the shoulder joint and sensory tests (light touch and two-point discrimination sense of the dominant hand.). Sensory function (postural control and reaction time) was evaluated with the flamingo balance test, functional reach test, and pro-agility test. The goalball players' throwing technique was questioned. Seventeen male players, those aged 20-30 (20.8±3.9 years) who have been professionally engaged in goalball for at least three years (58.7-37.8 months) participated. Shoulder internal rotation joint position sense and the flamingo balance test were found to be different in the group with B1 visual acuity than in the group with B3 visual acuity (p = 0.042* and 0.028 respectively). There was no difference between groups with B1-B2 visual acuity (p = 0.394 and p = 0.065) and between groups with B2-B3 visual acuity (p = 0.792 and p = 0.931). There was no difference in the groups in terms of sensory tests and reaction time (p> 0.05). In goalball, joint position sense is related to throwing techniques. Although there is a general acceptance that other sensory systems should work harder to compensate for the sense of vision, fear of falling, athlete's branch year, sports year, muscle strength, and general physical condition of the athlete may affect the measurements made, especially in the dynamic position.

A Triboelectric Nanogenerator Based on Bamboo Leaf for Biomechanical Energy Harvesting and Self-Powered Touch Sensing

Recently, natural material-based triboelectric nanogenerators (TENGs) have increasingly attracted attention in academic circles. In this work, we have developed an innovative triboelectric nanogenerator (BL-TENG) utilizing bamboo leaves to capture biomechanical energy. Bamboo leaf, as a natural plant material, possesses a diverse array of applications due to its remarkable durability, which surpasses that of many other types of trees. Furthermore, bamboo leaf has the advantages of low cost, widely distributed, non-toxic and environmentally protected. The output power of the BL-TENG (size: 5 cm × 5 cm) is able to generate approximately 409.6 µW and the internal resistance of the BL-TENG is 40 MΩ. Furthermore, the BL-TENG can realize an open-circuit voltage (Voc) of 191 V and a short-circuit current (Isc) of 5 µA, respectively. The biomechanical energy harvesting effect of the BL-TENG device means that it can drive 18 commercial light-emitting diodes (LEDs) through the full-wave bridge rectifier. Furthermore, the BL-TENG can also serve as a self-powered touch sensor to reflect hand touch states. This study proposed a novel plant-based TENG device that can enhance the development of green TENG devices and self-powered sensing systems.

Preventive behaviors against COVID-19 among health care providers in Iran: A cross-sectional study.

During outbreaks of infectious diseases, if healthcare providers do not follow the principles of prevention, the risk of personal infection increases and they become a source of infection spread. This study aimed to determine the factors related to the preventive health behaviors of COVID-19 among Iranian healthcare providers based on protection motivation theory (PMT). This analytical cross-sectional study included 346 healthcare providers. Data was collected by an online researcher-made questionnaire based on PMT. To analyze the data, independent T tests, analysis of variance (ANOVA), Spearman correlation coefficient, multiple linear regression, and SPSS 22 software were used. α was considered as 0.05. 85.3% of the healthcare providers would always wear masks, 80.7% would always refuse to kiss and touch hands with others, and 34.7% sometimes would exercise at home. The preventive behaviors were significantly correlated with protection motivation (r = 0.84), self-efficacy (r = 0.51), response efficiency (r = 0.43), perceived severity (r = 0.41) Fear (r = 0.21), perceived susceptibility (r = 0.11), response cost (r = -0.14), and reward (r = -0.15). PMT constructs were able to predict 77% of the variance of the behaviors and the protection motivation construct was the strongest predictor (β = 0.806). Income above 300 Dolars per month was significantly related to the decrease in the mean score of preventive behaviors against COVID-19. The female sex and the individual or family history of infectious diseases were significantly related to increasing the mean score of COVID-19 preventive behaviors. Based on the study results, it is suggested that some educational interventions be designed and implemented with a focus on this construct and the perceived severity construct and that more attention be given to the education of health care providers with high-income levels, male providers, and the individuals without a history of corona infection in themselves or their family members.

Imaging privacy threats from an ambient light sensor.

Embedded sensors in smart devices pose privacy risks, often unintentionally leaking user information. We investigate how combining an ambient light sensor with a device display can capture an image of touch interaction without a camera. By displaying a known video sequence, we use the light sensor to capture reflected light intensity variations partially blocked by the touching hand, formulating an inverse problem similar to single-pixel imaging. Because of the sensors' heavy quantization and low sensitivity, we propose an inversion algorithm involving an ℓp-norm dequantizer and a deep denoiser as natural image priors, to reconstruct images from the screen's perspective. We demonstrate touch interactions and eavesdropping hand gestures on an off-the-shelf Android tablet. Despite limitations in resolution and speed, we aim to raise awareness of potential security/privacy threats induced by the combination of passive and active components in smart devices and promote the development of ways to mitigate them.

Quantification of Touch DNA on Glass, Plastic, and Ceramic Glasses

In Indonesia, there are many criminal cases. Every criminal offender will certainly bring and leave something at the crime scene that can be used as a trial or evidence. In addition, perpetrators who accidentally or intentionally come into contact with surrounding objects can cause the transfer of trace evidence to these objects. DNA touch left on an object can provide information about the identity of individuals in contact with that object. This study aimed to determine the quantity and quality of DNA Touch in glasses made of glass, plastic, and ceramic that were touched by one proband and two probands. DNA extraction was carried out using the 5% Chelex method. using Univariate and one-way ANOVA. DNA quality was observed based on the comparison results of Å260 and Å280 on the SimpliNano spectrophotometer. The results showed that the concentration of DNA in glass, plastic and ceramics was not significantly different in each treatment. There was no interaction between the type of glass and hand touch, the average DNA concentration. Extracted DNA showed poor quality

Coronavirus disease appropriate behavior among medical representatives

Background: The coronavirus disease 2019 (COVID-19) crisis has brought many appropriate changes in the behavior of the people in India. It posed deleterious effects on nearly every industry and business sector and pharmaceutical industry is no exception. Medical representatives were facing challenges in contacting health-care providers and other concerned individuals for sales efforts during the pandemic affecting their work behaviors and outputs. Therefore, it is highly important that MRs have adequate knowledge about the COVID-19 appropriate behaviors (CABs). Aims and Objectives: The objective of our study was to assess the perception of COVID-19 appropriate behaviors (CAB), among medical representatives. Materials and Methods: The study was conducted during lockdown for a period of 3 months from May to July 2021. After obtaining Institutional approval using the CAB, published by the Ministry of Health and Family Welfare, a questionnaire was designed and along with the consent form was sent to Medical Representatives to collect the information on CAB. Data from all consented voluntary participants using self-administered Google forms were collected. The data collected were reversibly coded and confidentiality of participants was maintained. Results: A total of 88 number of medical representatives (n = 88) participated in the study. Of these, 96.50% were males and all were <50 years. Graduated participants constituted 96.6% (n = 85). Only 67.10% perceived it as a serious disease. Greeting without physical contact was practiced by 57 (64.7%), Namaste, by 56 (63.3%). Avoiding touching hands, nose, and mouth was considered very important by 68.9%. Covering nose and mouth when you cough or sneeze with handkerchief was considered important for 96.6%. Avoiding touching eyes, nose, and mouth was considered “not important at all” and slightly important by 2.2% and 5.6%, respectively. Discourage and avoiding crowd was thought as not important at all by 3.4% and slightly important by 2.3%. Conclusion: The medical representatives are well informed about COVID-19 disease and it is spread but only 2/3rd of the participants regarded COVID-19 as a serious condition and practiced various CABs to prevent infection spread. They considered national news and doctors as the main source of information.

Assessments of Order-Picking Tasks Using a Paper List and Augmented Reality Glasses with Different Order Information Displays

This study investigated the effects of wearing AR devices on users’ performance and comfort ratings while performing order-picking (OP) tasks. In addition to a picking-by-paper list, two AR devices combined with three order information display designs were examined. Thirty adult participants joined. They searched for and found the boxes in the order list, picked them up, and returned to the origin. The time to complete the task and the number of incorrect boxes picked up were analyzed to assess the performance of the tasks. The subjective ratings of the participants on the comfort rating scale (CRS) and the simulator sickness questionnaire (SSQ) were collected to assess the designs of both the AR devices and the order information displays. It was found that the participants could complete the OP tasks faster when adopting the order map (4.97 ± 1.57 min) or the 3D graph display (4.87 ± 1.50 min) using either one of the AR devices than when using a paper list (6.03 ± 1.28 min). However, they needed more time to complete the OP tasks when wearing both types of AR glasses when the Quick Response (QR) code option was adopted (10.16 ± 4.30 min) than when using a paper list. The QR code scanning and display design using either one of the AR devices guaranteed 100% accuracy but sacrificed efficiency in task completion. The AR device with a binocular display and hand gesture recognition functions had a significantly lower CRS score in the dimensions of attachment and movement (5.6 and 6.3, respectively) than the corresponding dimensions (8.0 and 8.3, respectively) of the other device with a monocular and hand touch input design. There were complaints of eye strain after using both AR devices examined in this study. This implies that these AR devices may not be suitable to wear for extended periods of time. Users should take off the AR device whenever they do not need to view the virtual image to avoid eye strain and other discomfort symptoms.

Cortical Response Variation with Social and Non-Social Affective Touch Processing in the Glabrous and Hairy Skin of the Leg: A Pilot fMRI Study.

Despite the crucial role of touch in social development and its importance for social interactions, there has been very little functional magnetic resonance imaging (fMRI) research on brain mechanisms underlying social touch processing. Moreover, there has been very little research on the perception of social touch in the lower extremities in humans, even though this information could expand our understanding of the mechanisms of the c-tactile system. Here, variations in the neural response to stimulation by social and non-social affective leg touch were investigated using fMRI. Participants were subjected to slow a (at 3-5 cm/s) stroking social touch (hand, skin-to-skin) and a non-social touch (peacock feather) to the hairy skin of the shin and to the glabrous skin of the foot sole. Stimulation of the glabrous skin of the foot sole, regardless of the type of stimulus, elicited a much more widespread cortical response, including structures such as the medial segment of precentral gyri, left precentral gyrus, bilateral putamen, anterior insula, left postcentral gyrus, right thalamus, and pallidum. Stimulation of the hairy skin of the shin elicited a relatively greater response in the left middle cingulate gyrus, left angular gyrus, left frontal eye field, bilateral anterior prefrontal cortex, and left frontal pole. Activation of brain structures, some of which belong to the "social brain"-the pre- and postcentral gyri bilaterally, superior and middle occipital gyri bilaterally, left middle and superior temporal gyri, right anterior cingulate gyrus and caudate, left middle and inferior frontal gyri, and left lateral ventricle area, was associated with the perception of non-social stimuli in the leg. The left medial segment of pre- and postcentral gyri, left postcentral gyrus and precuneus, bilateral parietal operculum, right planum temporale, left central operculum, and left thalamus proper showed greater activation for social tactile touch. There are regions in the cerebral cortex that responded specifically to hand and feather touch in the foot sole region. These areas included the posterior insula, precentral gyrus; putamen, pallidum and anterior insula; superior parietal cortex; transverse temporal gyrus and parietal operculum, supramarginal gyrus and planum temporale. Subjective assessment of stimulus ticklishness was related to activation of the left cuneal region. Our results make some contribution to understanding the physiology of the perception of social and non-social tactile stimuli and the CT system, including its evolution, and they have clinical impact in terms of environmental enrichment.

Establishment of an animal model of adjacent segment degeneration after interbody fusion and related experimental studies

BackgroundDegenerative spine conditions are common and frequent clinical diseases, and adjacent segment disease (ASD) after spinal fusion (SF) is a common complication after spinal fusion (SF). In this study, we established an animal model of ASD after interbody fusion to observe the morphologic changes of adjacent segment (AS) disks and to determine the expression and significance of tumor necrosis factor-alpha (TNF-α) and interleukin-1beta (IL-1β) in ASD tissues to provide a good experimental basis and reference for clinical prevention and treatment of ASD after interbody fusion.MethodsThirty-six male and female New Zealand rabbits weighing 2.0–2.5 kg were randomly divided into control group (group A) and experimental groups (groups B, C, and D), with 9 rabbits in each group, of which groups B, C, and D were the 4-, 8-, and 12-week groups, respectively. Autologous iliac bone grafts were used as the bone graft material. In the experimental groups, a SF was performed on the C2–C3 intervertebral space. The C3–4 adjacent segments were examined. In the experimental group, the animals were subjected to gross observation, X-ray examination, hand touch inspection, and micro-computed tomography (micro-CT) 4, 8, and 12 weeks after surgery. The micromorphologic changes of the cervical disks in the segments of the control group and experimental groups were observed under light microscopy. Immunohistochemistry and Western blotting were used to detect the expression of TNF-α and IL-1β in the AS tissues after interbody fusion in the control and experimental groups.ResultsThe measurement data of the rabbit cervical spine bony structures indicated that the length of the vertebral body and the sagittal diameter of the lower end of the vertebral body decreased gradually from the 2nd–6th cervical vertebrae, and the difference was statistically significant (P < 0.05). The difference in the transverse diameter of the lower end of the vertebral body was not statistically significant (P > 0.05), the change in the oblique diameter of the lower end of the vertebral body fluctuated, and the difference was statistically significant (P < 0.05). The fusion rate of the cervical spine by hand touch inspection was 22.2% (2/9), 55.6% (5/9), and 88.9% (8/9) in groups B, C, and D, respectively. The differences in bone volume-to-total volume (BV/TV) and X-ray scores were statistically significant in groups B, C, and D (P < 0.05). Significant degeneration occurred in groups B, C, and D compared with group A. The expression of TNF-α and IL-1β in the intervertebral disk tissue was significantly higher in groups B, C, and D compared with group A (P < 0.05), and increased with time.ConclusionIn this study, an animal model of ASD after interbody fusion fixation in rabbits was successfully established. Postoperative imaging and hand touch inspection showed a positive correlation between the amount of new intervertebral bone and the degree of fusion with time. The results of immunohistochemistry and Western blot showed that TNF-α and IL-1β were highly expressed in the AS tissues of the experimental group after interbody fusion, and the degree of disk degeneration was positively correlated with the time after interbody fusion.

The Bearded Man and the Pregnant Woman Terracotta Figurines: A Case of Divine “Open Relationship” in Persian-Period Levant?

ABSTRACT In this article, the authors analyze a widespread Persian-period terracotta figurine type in the Levant: the seated man with an atef crown or a cylindrical tiara and a hand touching his beard. As well as studying the specific attributes and the evolution of this iconography, the authors will address its association in cultic contexts with another figurine: the pregnant woman. By providing new arguments to identify the bearded man and the pregnant woman as (mainly) divine images, which are at the same time associated and distinct, the authors stress that the idea of a divine couple in an “open relationship” is of pivotal importance in understanding the organization of ancient polytheisms.

Instrumental mechanical parameters related to hand-feel touch firmness of blueberries

Hand-feel touch firmness is a sensory method reported to be used by the blueberry industry to characterise individual fruit firmness quality. A ‘soft’ blueberry may be considered unmarketable. However, firmness assessed by a hand touch is questionable due to being highly influenced by the assessor's subjective judgment. Objective instrumental methods are preferred to measure firmness and create a reliable and consistent dataset. This research aimed to study the relationship between sensory hand-feel touch firmness measured by a trained sensory panel and instrumental mechanical parameters of blueberry ‘Centurion’. To our knowledge, this is the first attempt to relate instrumental mechanical parameters to hand firmness using a sensory panel setting and reference samples to exemplify hand-feel intensity differences. Seven assessors were trained to evaluate hand touch firmness in a sensory panel setting. References samples resembling a blueberry were made of silicone and used to calibrate assessors’ performance by exemplifying four blueberry firmness scores (‘very soft’, ‘soft’, ‘firm’ and ‘very firm’). Six sensory sessions were conducted, where each session represented a harvest date and storage time combination (3 harvest dates X 2 storage times). Each sensory session considered blueberries exposed to five storage relative humidity (71 %, 88 %, 95 %, 97 % and 100 % RH). As a result, assessors were able to discriminate differences in hand touch firmness as influenced by storage relative humidity (water loss differences). In addition, mechanical parameters measured by the slope of force-deformation curve using a plate probe on a compression test (hardness slope) or a needle probe on a penetration test (skin break slope) were best related to sensory hand-feel firmness. Average hardness slope and skin break slope higher than 1.7 kN m−1 and 0.42 kN m−1, respectively, were associated with a very low (≤5 %) likelihood of observing unmarketable (‘soft’ + ‘very soft’) 'Centurion' blueberries in a batch. Our study provides a basis for the standardisation of mechanical methods that can be used to assess blueberry quality based on its ability to represent consumer sensation preferences of texture.

Language in the Hypnotherapy of Depression Healing: A Neurolinguistic Study

The neurolinguistic concept is similar to language function in that it expresses thought that leads to behavior, habit, and character. This study focuses on neurolinguistics to investigate the language used in hypnotherapy. Language is a therapy medium for curing depressive disorders resulting from different factors. Most of the depressive disorders treated at the Bali Brahma Kuntha Center Clinic are caused by disharmony or connection interruption between the left and right hemispheres of the brain, resulting in perception mapping errors. This mind disharmony is responsible for depressive disorder. This study employs a descriptive qualitative approach with a corpus of language or text data to cure depressive disorders. The corpus is the text used by the participants involved in the curing activities between the patients and the therapist. The data was collected using the observation method via recording and note-taking. The results reveal that language is closely related and cannot be separated from a depressive disorder. The type of hypnotherapy used to cure depressive disorder employs religious doctrines, referred to as theohypnotherapy. Overall, language or text is completed with the body, with hand touch induction especially used in the curing procedures. The hypnotherapy results indicate all the patients, based on the testimony texts, recovered from the depressive disorder.

Hold me or stroke me? Individual differences in static and dynamic affective touch.

Low-threshold mechanosensory C-fibres, C-tactile afferents (CTs), respond optimally to sensations associated with a human caress. Additionally, CT-stimulation activates brain regions associated with processing affective states. This evidence has led to the social touch hypothesis, that CTs have a key role in encoding the affective properties of social touch. Thus, to date, the affective touch literature has focussed on gentle stroking touch. However, social touch interactions involve many touch types, including static, higher force touch such as hugging and holding. This study aimed to broaden our understanding of the social touch hypothesis by investigating relative preference for static vs dynamic touch and the influence of force on these preferences. Additionally, as recent literature has highlighted individual differences in CT-touch sensitivity, this study investigated the influence of affective touch experiences and attitudes, autistic traits, depressive symptomology and perceived stress on CT-touch sensitivity. Directly experienced, robotic touch responses were obtained through a lab-based study and vicarious touch responses through an online study where participants rated affective touch videos. Individual differences were determined by self-report questionnaire measures. In general, static touch was preferred over CT-non-optimal stroking touch, however, consistent with previous reports, CT-optimal stroking (velocity 1-10 cm/s) was rated most pleasant. However, static and CT-optimal vicarious touch were rated comparably for dorsal hand touch. For all velocities, 0.4N was preferred over 0.05N and 1.5N robotic touch. Participant dynamic touch quadratic terms were calculated for robotic and vicarious touch as a proxy CT-sensitivity measure. Attitudes to intimate touch significantly predict robotic and vicarious quadratic terms, as well as vicarious static dorsal hand touch ratings. Perceived stress negatively predicted robotic static touch ratings. This study has identified individual difference predictors of CT-touch sensitivity. Additionally, it has highlighted the context dependence of affective touch responses and the need to consider static, as well as dynamic affective touch.

Exploring how the LR of a POI in a target sample is impacted by awareness of the profile of the background derived from an area adjacent to the target sample

DNA unrelated to an action of interest (background DNA) is routinely collected when sampling an area for DNA that may have originated from an action of interest. Background DNA can add to the complexity of a recovered DNA profile and could impact the discrimination power when comparing it to the reference profile of a person of interest. Recent advances in probabilistic genotyping and the development of new tools, now allow for the comparison of multiple evidentiary profiles to query for a common DNA donor. Here, we explore the additional discrimination power that can be gained by having an awareness of the background DNA present on a surface prior to the deposition of target DNA. Samples with varying number of contributors and DNA quantities were generated on cleaned plastic pipes (where ground truth was known) and items used by occupants of a single household (where ground truth was not known). The background consisted of deposits made by hands (touch) while target deposits were both touch and saliva. Samples were collected from areas consisting of only the background (A), the target and the background directly beneath it (B), and the target and additional surrounding background (B+C). Samples B and B+C yielded similar DNA amounts when the target consisted of saliva, but when the target consisted of touch, significantly more DNA was recovered from B+C. Subsequently generated DNA profiles were interpreted using STRmix™ and DBLR™. The first approach involved no conditioning while the second approach involved conditioning on the reference profiles of the known background DNA donors. The third approach involved conditioning on one common DNA donor between A and B or A and B+C. The fourth and final approach involved conditioning on two common DNA donors between A and B or A and B+C. As more information was applied to the analysis, the greater the increase in the LR for the comparison of the target sample to the POI. Conditioning on two common donors between the target and the background provided almost the same amount of information as conditioning on the references of the known background DNA donors. This resulted in an increase in the LR that was over 10 orders of magnitude for known donors in the target sample. Here we have demonstrated the value in collecting additional background samples from an area adjacent to a targeted sample, and that this has the potential to improve discrimination power.

Titanium elastic nail treatment for a humeral shaft fracture of an adolescent arm wrestler: A case report and literature review

Arm wrestling is a sport where two people take opposing positions at a table and put their elbows on the table with their palms together, the aim being to make the opponent’s hand touch the table. Arm wrestling, which seems harmless, may become a show of strength for adolescents and young adults. Muscle and tendon injuries and bone fractures may occur due to arm wrestling. Fractures of the humeral shaft and distal third region can also occur due to arm wrestling. Here, we present the contribution of closed reduction and titanium intramedullary nail treatment to early return to school for a 14-year-old male patient with an AO 12.A1 fracture of the humeral shaft that occurred during arm wrestling. Our treatment reduced the duration of immobilization, provided complete union at the fracture site along with full range of motion of shoulder and elbow joints at 3 months after the injury.

Review Essay: Chasing Down the Shadows: Writings of Abuse and Harassment

Review Essay: Chasing Down the Shadows: Writings of Abuse and Harassment

Evaluation of performance results for low-cost 3D printed myoelectric prosthetic devices during Cybathlon 2020 ARM discipline

The performance of a low-cost 3D printed myoelectric prosthetic device known as the Touch Hand 4.5, at the 2020 Cybathlon competition is discussed. This device is under development as a low-cost prosthetic device for upper-limb amputees. The Touch hand team placed 13th out of 15 teams at the Cybathlon competition. By assessing the performance of the device and comparing with the performance of competitors, avenues of future research for the improvement of the Touch hand are identified.