MyMedR

Chirp response of an active-controlled thickness-drive tunable transducer

Alwi HA, Carey JR, Smith BV

J Acoust Soc Am, 2000 Mar;107(3):1363-73.

The chirp response of a thickness-drive tunable transducer for wide range time-bandwidth and sweep rates chirp signals is demonstrated experimentally and computationally. The computational evaluation uses recursive digital-filter model based on the z-transform method. The model is limited to simple lossless structure with no front and backing layers. The model and experimental results show that there is no limit on the maximum sweep rate of the chirp signal but practically the limit is determined by the limitation of the circuit that generates the control voltage that simulates a variable electric load.

Matched MeSH terms: Torso

Contribution of Rayleigh scattering on Brillouin comb line generation in Raman fiber laser

Zamzuri AK, Al-Mansoori MH, Samsuri NM, Mahdi MA

Appl Opt, 2010 Jun 20;49(18):3506-10.

PMID: 20563203 DOI: 10.1364/AO.49.003506

We demonstrate the generation of multiple Brillouin Stokes lines generation assisted by Rayleigh scattering in Raman fiber laser. The linear cavity is utilized to take advantage of the Rayleigh scattering effect, and it also produces two strong spectral peaks at 1555 and 1565nm. Under a strong pumping condition, the Rayleigh backscatters contribute to the oscillation efficiency, which increases the Brillouin Stokes lines intensity between these two wavelength ranges. The multiple Stokes lines get stronger by suppressing the buildup of free-running longitudinal modes in the laser structure.

Matched MeSH terms: Torso

A new species of Amalothrips Ananthakhrishnan from Malaysia, with first description of male

Ng YF

Zootaxa, 2015;4032(2):246-50.

PMID: 26624359 DOI: 10.11646/zootaxa.4032.2.13

Amalothrips noorazlani sp. n. is described from Malaysia based on both sexes, and a key is provided to the species of this genus. This is the first record of Amalothrips species outside India, and the first description of a male Amalothrips. The male has a pair of drepanae, the tergal posteromargin bears a toothed craspedum, but there are no sternal pore plates.

Matched MeSH terms: Torso

Fulltext Stochastic electromagnetic field propagation- measurement and modelling

Gradoni G, Russer J, Baharuddin MH, Haider M, Russer P, Smartt C, et al.

Philos Trans A Math Phys Eng Sci, 2018 Oct 29;376(2134).

PMID: 30373944 DOI: 10.1098/rsta.2017.0455

This paper reviews recent progress in the measurement and modelling of stochastic electromagnetic fields, focusing on propagation approaches based on Wigner functions and the method of moments technique. The respective propagation methods are exemplified by application to measurements of electromagnetic emissions from a stirred, cavity-backed aperture. We discuss early elements of statistical electromagnetics in Heaviside's papers, driven mainly by an analogy of electromagnetic wave propagation with heat transfer. These ideas include concepts of momentum and directionality in the realm of propagation through confined media with irregular boundaries. We then review and extend concepts using Wigner functions to propagate the statistical properties of electromagnetic fields. We discuss in particular how to include polarization in this formalism leading to a Wigner tensor formulation and a relation to an averaged Poynting vector.This article is part of the theme issue 'Celebrating 125 years of Oliver Heaviside's 'Electromagnetic Theory''.

Matched MeSH terms: Torso

Fulltext Extensive Aplasia Cutis Congenita Encircling the Trunk Associated with Fetus Papyraceus

Leung AKC, Leong KF, Lam JM

Case Rep Pediatr, 2020;2020:8824757.

PMID: 32908765 DOI: 10.1155/2020/8824757

Aplasia cutis congenita associated with fetus papyraceus, though rare, is well known. On the other hand, aplasia cutis congenita associated with fetus papyraceus presenting with symmetrical circumferential scarring encircling the trunk has not been previously reported. Herein, we report a 2-month-old girl with symmetrical circumferential scarring encircling the trunk associated with fetus papyraceus.

Matched MeSH terms: Torso

Fulltext Myositis Ossificans in a 4-year-old Child

Boo, H.W., Vasanthie, B., Zulkifli, O.

Malays Orthop J, 2010;4(3):19-21.

MyJurnal

Sprengelâ€™s shoulder and myositis ossificans (MO) are rarely seen concomitantly. This report is about a rare case in a 4 year-old girl who presented with right shoulder deformity and pain associated with right proximal arm swelling.

Matched MeSH terms: Torso

Deep Tendon Reflex: The Tools and Techniques. What Surgical Neurology Residents Should Know

Lin-Wei O, Xian LLS, Shen VTW, Chuan CY, Halim SA, Ghani ARI, et al.

Malays J Med Sci, 2021 Apr;28(2):48-62.

PMID: 33958960 DOI: 10.21315/mjms2021.28.2.5

The deep tendon reflex (DTR) is a key component of the neurological examination. However, interpretation of the results is a challenge since there is a lack of knowledge on the important features of reflex responses such as the amount of hammer force, the strength of contraction, duration of the contraction and relaxation. The tools used to elicit the reflexes also play a role in the quality of the reflex contraction. Furthermore, improper execution techniques during the DTR assessment may alter the findings and cloud the true assessment of the nervous system. Therefore, understanding the basic principles and the key features of DTR allows for better interpretation of the reflex responses. This paper discusses the brief history of reflexes, the development of the reflex hammer, and also the key features of a reflex response encompassing the amplitude of force needed to elicit a reflex response, the velocity of contraction, the strength of contraction, and the duration of contraction and relaxation phases. The final section encloses the techniques of eliciting DTR in the upper extremities, trunk, and lower extremities, and the interpretation of these reflexes.

Matched MeSH terms: Torso

Simulium ledangense, a new species of the Simulium feuerborni species-group of the subgenus Nevermannia (Diptera: Simuliidae) from Mount Ledang, Peninsular Malaysia

Ya'cob Z, Takaoka H, Sofian-Azirun M

Zootaxa, 2014;3881(3):228-36.

PMID: 25543632 DOI: 10.11646/zootaxa.3881.3.2

Simulium (Nevermannia) ledangense sp. nov. is described from females, males, pupae and mature larvae from Peninsular Malaysia. This new species is assigned to the Simulium feuerborni species-group of the subgenus Nevermannia, and is characterized by the pupa having a very long stalk of the ventral paired gill filaments, which is almost five times longer than the interspiracular trunk and female tergites of segments 2 and 5 to 7 shiny. Taxonomic notes are given to distinguish this new species from three known species of the S. feuerborni species-group from Malaysia.

Matched MeSH terms: Torso

Cervical lipoblastoma: An uncommon presentation

Jaafar R, Tang IP, Jong DE, Narihan MZ

Ear Nose Throat J, 2015 Jul;94(7):E8-10.

PMID: 26214680

Lipoblastoma is extremely rare and mainly occurs in children younger than 3 years old. It is predominantly found in the extremities and trunk. Head and neck region occurrences are rare; only 4 such cases involving patients who presented with stridor have been previously reported. We report the fifth case of lipoblastoma of the neck with stridor in a 9-year-old girl, which had gradually worsened over the previous year. Imaging showed a retrotracheal mass extending superiorly to the thyroid level and inferiorly to below the carina of the trachea. Total resection of the tumor was performed, and the histopathologic findings were consistent with lipoblastoma. Postoperatively, the patient was well with no complications.

Matched MeSH terms: Torso

Fulltext The uncharted danger of living in the tropics: a needlefish impalement of the sigmoid colon

Assikin Muhamad, Aishath Azna Ali, Firdaus Hayati, Andee Dzulkarnaen Zakaria

Malaysian Journal of Medicine and Health Sciences, 2020;16(3):337-339.

MyJurnal

Penetrating injury to the abdominal viscera is not uncommon unless when it is caused by marine life. We present a 39-year-old fisherman from a tropical country who had sustained a penetrating injury from a stab wound to the abdomen due to needlefish impalement. He sustained a small perforation of the sigmoid colon during exploratory laparotomy and primary repair was done. Although this incident is rare, there are cases involving seawater activities either for leisure, sport or diving for fishing. We highlight this rare incident and discuss the management plan.

Matched MeSH terms: Torso

Three new species of black flies (Diptera: Simuliidae) from the Lesser Sunda Archipelago, Indonesia

Takaoka H, Sofian-Azirun M, Chen CD, Lau KW, Halim MRA, Low VL, et al.

Trop Biomed, 2018 Dec 01;35(4):951-974.

PMID: 33601844

Simulium (Gomphostilbia) dhangi sp. nov., S. (G.) sumbaense sp. nov. and S. (Nevermannia) wayani sp. nov. are described from the Lesser Sunda Archipelago, Indonesia. Simulium (G.) sumbaense sp. nov. is placed in the S. varicorne species-group and is characterized by the pupal gill with eight filaments arranged as (1+1+1+1+2)+2 from dorsal to ventral, while S. (G.) dhangi sp. nov., unplaced to group, is characterized by the pupal gill composed of two inflated trunks and four slender filaments all arising basally, and the short larval antenna as long as the stem of the labral fan. Simulium (N.) wayani sp. nov. belongs to the S. ruficorne species-group and is characterized by the female spermatheca with an unsclerotized neck, and pupal gill with four inflated filaments. The number of species of black flies from the archipelago increases from 19 to 22.

Matched MeSH terms: Torso

A new species of cockroach, Periplaneta gajajimana sp. nov., collected in Gajajima, Kagoshima Prefecture, Japan

Komatsu N, Lio H, Ooi HK

Trop Biomed, 2021 Jun 01;38(2):48-52.

PMID: 33973572 DOI: 10.47665/tb.38.2.036

We described a new species of cockroach, Periplaneta gajajimana sp. nov., which was collected in Gajajima, Kagoshima-gun Toshimamura, Kagoshima Prefecture, Japan, on November 2012. The new species is characterized by its reddish brown to blackish brown body, smooth surface pronotum, well developed compound eyes, dark brown head apex, dark reddish brown front face and small white ocelli connected to the antennal sockets. In male, the tegmen tip reach the abdomen end or are slightly shorter, while in the female, it does not reach the abdominal end and exposes the abdomen beyond the 7th abdominal plate. We confirmed the validity of this new species by breeding the specimens in our laboratory to demonstrate that the features of the progeny were maintained for several generations. For comparison and easy identification of this new species, the key to species identification of the genus Periplaneta that had been reported in Japan to date are also presented.

Matched MeSH terms: Torso

Fulltext Subject-Specific Effect of Metallic Body Accessories on Path Loss of Dynamic on-Body Propagation Channels

Rahim HA, Abdulmalek M, Soh PJ, Rani KA, Hisham N, Vandenbosch GA

Sci Rep, 2016 07 20;6:29818.

PMID: 27436496 DOI: 10.1038/srep29818

This paper presents the investigation of path loss variation for subject-specific on-body radio propagation channels, considering the effect of metallic spectacles and loop like metallic accessories. Adding metallic items may affect the operability of Body Centric Wireless Communications (BCWC). Measurements were carried out in an RF-shielded room lined with microwave absorbing sheets for strategically placed bodyworn antennas covering the upper front torso and the lower limbs. The path loss of the on-body radio channel was characterized explicitly taking into account the body size of the subjects. For metallic loop-like accessories, the results indicate that for underweight subjects, there was a slightly higher influence, up to 2%, compared to normal and overweight subjects. Our findings indicate that a noticeable effect exists on on-body channels for dynamic movements where the metallic watch acts as a local scatterer that affects the non-line-of-sight (NLOS) signal path between transmitter and receiver for underweight subjects in comparison to normal and overweight subjects. The path loss decreases when the receiving terminal was positioned very close to the metallic item. If a loop-like metallic accessory is not appropriately considered when designing the radio channel on a subject, the reliability of the body-centric wireless system may degrade.

Matched MeSH terms: Torso

Fulltext Pen and paper based observational method to assess postural problems: a review

Sukadarin, E.H., Deros, B.M., Nawi, N.S.M., Rambely, A.S., Bakar, S.A., Tamrin, S.B.M.

Malaysian Journal of Public Health Medicine, 2016;16(20):78-83.

MyJurnal

Posture is one of the most important factor that need to be considered in any postural analysis. Awkward, extreme,
and repetitive postures can increase the risk of musculoskeletal disorders (MSDs). As observational methods are more
widely used than instrumentation-based methods to assess postural problems, this study reviews and assesses the
scientific literature of observational methods and focused on pen and paper based specifically. In order to identify the
published methods, a list of English or Malay articles dating as far back as 1990 was compiled from PubMed, Science
Direct and Google Scholar. The keywords were ergo*, posture*, method*, observational*, postural problems*, pen and
paper*, posture analysis*, indirect* and macro-ergo*. In addition, a secondary search was also performed using
bibliography of retrieved articles so that additional papers for conducting review and evaluations can be collected. A
total of 121 articles that assessed postural problems in working activities were found. However, after intensive
screening process only 6 articles were selected to be further analyzed. Posture of upper arms/shoulder, lower arms/
elbow, wrist, neck, back/trunk and leg were highlighted in this study. The limitations and the strengths of the
published pen and paper based observational method focusing on those postures were also discussed. The finding of
this review will benefit researchers in the process of understanding unsafe posture in workplace. It could also provide
to researcher on how to improve the current pen and paper based observational method for assessing postural
problems.

Matched MeSH terms: Torso

Fulltext Acute lymphangitis in a preschool child: a case report

Loh, Huai Seng

International e-Journal of Science, Medicine & Education, 2012;6(2):46-48.

MyJurnal

A 3-year old preschool boy presented with a pruritic red streak at the dorsum of his right foot traveling
upward from the affected site which was red and swollen. Insect sting was the more likely trigger which had caused the cellulitis and subsequently the acute lymphangitis.

Matched MeSH terms: Torso

Fulltext A Chinese New Year rash

Keah RSH, Ch'ng KS

Malays Fam Physician, 2013;8(2):62-64.

PMID: 25606287 MyJurnal

A 28-year-old man presented with a chief complaint of rashes all over his body. He had a history of a trip to Langkawi Island, a famous island resort off the west coast of Malaysia, over the Chinese New Year’s weekend. According to him, he had a lot of fun with a group of friends at the sunny beach and the beautiful sea. There were no untoward incidents and they were perfectly well when they returned home after a 2-day trip. On the evening of the second day after his return, he noticed rashes appearing over his body, notably on shoulders and trunk. These rashes were little painful in nature.

Matched MeSH terms: Torso

Fulltext The effect of hand grip strength and trunk rotation strength on throwing ball velocity

Rozella Ab Razak, Kee, Kang Mea, Raja Nurul Jannat Raja Hussain, Nur Atikah Mohamed Kassim, Nuraimi Othman

Movement Health & Exercise, 2018;7(1):89-98.

MyJurnal

Throwing ball velocity is one of the indicators that determine softball
performance. However, most of the training on throwing only focused on the
major muscles and they neglected the assisted muscles such as hand grip and
trunk rotation muscles that also crucial in improving the throwing
performance. Therefore, the purpose of this study is to identify the effect of
hand grip strength training, and trunk rotation strength training towards the
throwing ball velocity among female collegiate softball players. 54 female
collegiate softball players were equally divided into three training groups
which are hand grip strength training group (HG), trunk rotation strength
training group (TR), and basic strength training group (CG). All the groups
performed the same basic strength training program with different additional
strength training according to the group`s treatment. Each group trained 3
days per week for 6 weeks. Throwing ball velocity was assessed before
(pretest) and after (posttest) the 6 weeks training program via one-way
between groups analysis of variance (ANOVA) to compare the mean gained
score in throwing ball velocity between each group. The result shows that all
group significantly differences in throwing ball velocity (p

Matched MeSH terms: Torso

Fulltext Comparison of Core Stabilisation Exercise and Proprioceptive Neuromuscular Facilitation Training on Pain-related and Neuromuscular Response Outcomes for Chronic Low Back Pain: A Randomised Controlled Trial

Areeudomwong P, Buttagat V

Malays J Med Sci, 2019 Nov;26(6):77-89.

PMID: 31908589 DOI: 10.21315/mjms2019.26.6.8

Background: Existing literature offers little guidance for therapists who provide core stabilisation exercise (CSE) and proprioceptive neuromuscular facilitation (PNF) training to treat chronic low back pain (CLBP). Studies conducting a head-to-head comparison of CSE and PNF training for CLBP are needed.

Objective: To compare the effects of CSE and PNF training on pain-related outcomes and trunk muscle activity in CLBP patients.

Methods: Forty-five CLBP patients, ranging from 18 to 50 years of age, were randomly divided and assigned to either a four-week CSE, four-week PNF training, or control group. Pain-related outcomes, including pain intensity, functional disability and patient satisfaction, as well as superficial and deep trunk muscle activity were assessed before and after the four-week intervention, and at a three-month follow-up.

Results: Compared to the control group, those in the CSE and PNF training groups showed significant improvements in all pain-related outcomes after the four-week intervention and at three-month follow-up (P < 0.01). Following the four-week intervention, both CSE and PNF training groups demonstrated significant improvement in deep trunk muscle activity, including the transversus abdominis (TrA) and superficial fibres of lumbar multifidus (LM), compared to the control group (P < 0.05).

Conclusion: Four-week CSE and PNF training provided short-term and long-term effects on pain-related outcomes, along with increased deep trunk muscle activity in CLBP patients.

Matched MeSH terms: Torso

Fulltext Relationship between Psychosocial Risk Factors and Work-Related Musculoskeletal Disorders among Public Hospital Nurses in Malaysia

Amin NA, Nordin R, Fatt QK, Noah RM, Oxley J

Ann Occup Environ Med, 2014;26:23.

PMID: 25852937 DOI: 10.1186/s40557-014-0023-2

OBJECTIVE: This study examined the relationships between psychosocial work factors and risk of WRMSDs among public hospital nurses in the Klang Valley, Malaysia.

METHODS: We conducted a cross-sectional study among 660 public hospital nurses. A self-administered questionnaire was used to collect data on the occurrence of WRMSDs according to body regions, socio-demographic profiles, occupational information and psychosocial risk factors. 468 questionnaires were returned (response rate of 71%), and 376 questionnaires qualified for subsequent analysis. Univariate analyses were applied to test for mean and categorical differences across the WRMSDs; multiple logistic regression was applied to predict WRMSDs based on the Job Strain Model's psychosocial risk factors.

RESULTS: Over two thirds of the sample of nurses experienced discomfort or pain in at least one site of the musculoskeletal system within the last year. The neck was the most prevalent site (48.94%), followed by the feet (47.20%), the upper back (40.69%) and the lower back (35.28%). More than 50% of the nurses complained of having discomfort in region one (neck, shoulders and upperback) and region four (hips, knees, ankles, and feet). The results also revealed that psychological job demands, job strain and iso-strain ratio demonstrated statistically significant mean differences (p

Matched MeSH terms: Torso

Fulltext Exposure Level to Caregivers Resulting From the Scattered Radiation During a Radiographic Procedure

Sayed, I. S., Yusri, N. H.

Physics and Technology in Medicine, 2020;1(1):22-26.

MyJurnal

In radiography, radiation workers are responsible to protect patients and their caregivers from adverse effects of X-rays during diagnostic procedures. The X-ray examination rooms are designated as controlled areas where only authorised persons are allowed to enter. However, sometimes radiographers allow next in-line patients’ and caregivers in X-ray examination room and ask them to stand behind the mobile lead shielding when exposure is on. The objectives of this study were to determine the amount of scatter radiation dose at different heights with respect to the floor in the X-ray examination room and to educate and increase the awareness of radiation workers about the scattered radiation in minimizing the unnecessary radiation dose to patient’s caregivers. Siemens Multix Top X-ray system was used. Kyoto Kagaku PBU-50 whole body phantom was scanned. The phantom (torso) was positioned for anteroposterior (AP) lumbar projection on the examination table. The nanoDot OSLDs were fixed behind the lead shielding at different heights (120, 130, 140, 150, 160 and 170 cm) with respect to the floor 2.5 meters away from the central ray of X-ray beam. The phantom was exposed using different tube voltages 68 kVp, 79 kVp and 90 kVp at a constant tube current of 32 mAs fixing a 100 cm source to image distance (SID). Scatter radiation doses measured at different heights were different for each exposure. The highest scattered radiation dose measured was 6.4 mGy at 130 cm height for 79 kVp exposure. In conclusion the measured scattered radiation doses were within the acceptable annual dose limits as recommended by NCRP 116 and ICRP 103 for patient caregiver. However, a smallest amount of radiation dose may increase the risk of cancer. Thus, the negligence must not be overlooked because it exposes the caregiver to unnecessary radiation.

Matched MeSH terms: Torso

Displaying publications 1 - 20 of 26 in total