38 research outputs found
Comparison study of two surgical options for distal tibia fracture-minimally invasive plate osteosynthesis vs. open reduction and internal fixation
No full textThe aim of this study was to compare the results between two surgical options for distal tibia fracture, i.e. minimally invasive plate osteosynthesis (MIPO) vs. open reduction and internal fixation (ORIF), and explore the benefits and defects of these two techniques. Thirty cases of distal tibia fracture (15 pairs of ORIF and MIPO) were submitted for pair comparison with consistence of gender, age and AO fracture classification. Indexes for evaluation included operative time, blood loss, healing time, time of recovery to work, implant irritation symptoms, and union status. Mazur grading standard was introduced for functional evaluation. Statistical Package for Social Sciences (SPSS) 13.0 was used for analysis. No malunion occurred and one case of osteomyelitis developed in the ORIF group. In the ORIF group, ten cases were evaluated as excellent, three as good, one as fair and one as poor. In the MIPO group, ten cases were excellent and five good. Paired t-test found no significant differences between groups on the indexes for analysis. In conclusion, the MIPO technique is not distinctively superior to ORIF in treatment of distal tibia fracture.OrthopedicsSCI(E)PubMed15ARTICLE5737-7423
Research on optimization of image fast feature point matching algorithm
No full textAbstract The author studied the feature point extraction and matching based on BRISK and ORB algorithms, experimented with the advantages of both algorithms, and ascertained optimal pyramid layer and inter-layer scale parameters used in features extraction and matching for the same scale image and different scale images with BRISK and ORB algorithm, and analyzed the effectiveness of different parameters combinations on the accuracies of feature extraction and matching and proposed method to determine parameters based on the results. In addition, comparing with the traditional algorithm, using the optimal algorithm with the parameters combining Gaussian denoising, graying, and image sharpening, the ratio of feature points for detection improved 3%; the number of effective matching points increased by nearly 2%. Meanwhile, an algorithm experiment on UAV image mosaic was carried out. The transition of mosaic image color was more natural, and there was no clear mosaic joint with the stitching effect, which indicated that the optimized parameters and the extracted feature point pairs can be used for matrix operations and the algorithm is suitable for UAV image mosaic processing
THE EFFECTS OF WEATHER PARAMETERS ON THE ABUNDANCE AND DISTRIBUTION OF LARVAL AND ADULT MOSQUITOES IN MAKURDI METROPOLIS
No full text<p><strong>Abstract:</strong> In a bid to control malaria in Nigeria, this study was carried out to investigate the effects of weather parameters on the abundance and distribution of larval and adult mosquitoes in Makurdi metropolis, the capital of Benue State for a period of one year between November 2017 and October, 2018. Breeding sites were studies in five locations. Samples were collected twice per week both indoors and outdoors, using standard techniques. Three generic and four specific taxa of mosquito were identified: <em>Aedes aegypti, Anopheles gambiae, Anopheles funestus </em>and <em>Culex quiquefasciatus. </em>A total of 2,415 larvae were estimated in the five locations ranging from 345 (14.3%) larvae in Northbank to 615 (25.5%) in Wurukum. Average count was 483 in the five locations. <em>Culex quiquefasciatus </em>was the most abundant with a total of 1,384 and average of 276.8 larvae in the five locations where it was highest in Kanshio (303) and lowest in Northbank (183). Chi-square analysis showed a significant association between abundance of larvae and locations (χ<sup>2 </sup>=83.46, P<0.05). The observed differences in the population of each species of mosquito across the locations are statistically significant (P<0.05). Mean seasonal weather temperature was 32.9<sup>o</sup>C while amount of rainfall and relative humidity were 127.59mm and 71.83% respectively. <em>Anopheles gambiae </em>larval population had significantly high positive correlations coefficients with rainfall (0.735) and relative humidity (0.815) but negative coefficient with temperature (-0.707). <em>Anopheles funestus </em>larval population had high positive correlations coefficients with relative humidity (0.738). Population of <em>Anopheles </em>mosquito was significantly affected by temperature (F=10.26, P<0.05; R<sup>2</sup> = 50.65%), rainfall (F=11.13, P<0.05, R<sup>2</sup> = 52.67%) and relative humidity (F=19.88, P<0.05, R<sup>2</sup> = 66.53%. On the basis of how weather parameters affected determined the population of <em>Anopheles </em>mosquito, relative humidity > rainfall >temperature. In conclusion, all weather parameters (temperature, rainfall and relative humidity had marked effects on the abundance and distribution of the malaria vectors. This work has added to the existing data on the relationship between malaria vectors and weather factors which may enhance knowledge on malaria entomology and future malaria control interventions in the study area and beyond.</p>
<p><strong>Keywords:</strong> Mosquitoes, Abundance, Weather parameters, Malaria control.</p>
<p><strong>Title:</strong> THE EFFECTS OF WEATHER PARAMETERS ON THE ABUNDANCE AND DISTRIBUTION OF LARVAL AND ADULT MOSQUITOES IN MAKURDI METROPOLIS</p>
<p><strong>Author:</strong> Ukaabua, S.P., Manyi, M.M., Okoh, T.</p>
<p><strong>International Journal of Recent Research in Life Sciences (IJRRLS)</strong></p>
<p><strong>ISSN 2349-7823</strong></p>
<p><strong>Vol. 10, Issue 4, October 2023 - December 2023</strong></p>
<p><strong>Page No: 1-8</strong></p>
<p><strong>Paper Publications</strong></p>
<p><strong>Website: www.paperpublications.org</strong></p>
<p><strong>Published Date: 04-October-2023</strong></p>
<p><strong>DOI: <a href="https://doi.org/10.5281/zenodo.8407070">https://doi.org/10.5281/zenodo.8407070</a></strong></p>
<p><strong>Paper Download Link (Source)</strong></p>
<p><strong><a href="https://www.paperpublications.org/upload/book/THE%20EFFECTS%20OF%20WEATHER%20PARAMETERS-04102023-8.pdf">https://www.paperpublications.org/upload/book/THE%20EFFECTS%20OF%20WEATHER%20PARAMETERS-04102023-8.pdf</a></strong></p>International Journal of Recent Research in Life Sciences (IJRRLS), ISSN 2349-7823, Paper Publications, Website: www.paperpublications.or
Limb reconstruction surgery in China: an evaluation of its role in the largest developing nation
No full textChina is the "economic tiger" of the twenty-first century. Its new economic policies have overturned the outlook and futures of many industries in this nation, and parallel to this industrial progress have been strides in medicine. However a country steeped in a history of several millennia does not replace generations of experience nor knowledge in a few decades. The author explores the history of limb reconstruction surgery in this country, setting it in context of a population exposed to both traditional Chinese medicine and Western medicine.PubMed02-399-104
Postoperative malrotation of humeral shaft fracture after plating compared with intramedullary nailing
No full textObjective: We supposed difference of rotation alignment of postoperative humeral shaft fracutres between open reduction and internal fixation (ORIF) and intramedullay nailing (IMN) could be identified and the difference might influence the involved shoulder. This study evaluated and compared the extent of malrotation and shoulder function after humeral shaft fractures treated operatively with IMN or ORIF. Materials and methods: Fifty humeral shaft fractures were randomly allocated into 2 groups. Group I underwent antegrade IMN and group II underwent ORIF. Malrotation was measured postoperatively by computed tomography scan (CT). Fracture union and functional outcomes were recorded at 12 months. Results: The final analysis comprised 45 patients. Group I had lower functional scores than group II (P < .05). Internal malrotation of 20 degrees or more (humeral head internally rotated) was found in 27.2% of group I patients, but there was no malrotation in group II. The internal and external range of motion of the involved shoulder was significantly correlated with the degree of malrotation (P < .01). Discussion: This study comprehensively evaluated the degree of malrotation using CT scanning for every patient. These data bring to light some unexpected results about poor shoulder function and degeneration after humeral shaft fracture. The study can provide baseline data for larger series and longer follow-up periods. Conclusions: Patients who underwent IMN had lower functional scores and a decreased range of motion postoperatively and also had a greater degree of malrotation than the ORIF group, which had none. The degree of malrotation correlated with a decreased range of motion and may possibly be a reason for degenerative arthritis at long-term follow-up. Level of evidence: Level II, Randomized Controlled Trial, with Limited Power, Treatment Study. (C) 2011 Journal of Shoulder and Elbow Surgery Board of Trustees.OrthopedicsSport SciencesSurgerySCI(E)PubMed9ARTICLE6947-9542
High-density defects on PdAg nanowire networks as catalytic hot spots for efficient dehydrogenation of formic acid and reduction of nitrate
No full textControlling the surface defects of nanocrystals is a new way of tuning/boosting their catalytic properties. Herein, we report networked PdAg nanowires (NWs) with high-density defects as catalytic hot spots for efficient catalytic dehydrogenation of formic acid (FA) and catalytic reduction of nitrates. The networked PdAg NWs exhibit composition-dependent catalytic activity for the dehydrogenation reaction of FA without any additive, with Pd5Ag5 NWs exhibiting the highest activity. They also show good durability, reflected by the retention of their initial activity during the dehydrogenation reaction of FA even after five cycles. Their initial TOF is 419 h(-1) at 60 degrees C in water solution, much higher than those of the most Pd-based catalysts with a support. Moreover, they can efficiently reduce nitrates to alleviate nitrate pollution in water (conversion yield >99%). This strategy opens up a new green synthetic technique to design support-free heterogeneous catalysts with high-density defects as catalytic hot spots for efficient dehydrogenation catalysis of FA to meet the requirement of fuel cell applications and catalytic reduction of nitrates in water polluted with nitrates.National Natural Science Foundation of China [51571072, 21305025]; Fundamental Research Funds for the Central Universities [AUGA5710012715]; Heilongjiang Postdoctoral Scientific Research Development Fund [LBH-Q14058]; China Postdoctoral Science Foundation [2015M81436]; Heilongjiang Postdoctoral Science Foundation [LBH-Z15065]SCI(E)ARTICLE279305-9309
Is minimally invasive plating osteosynthesis for humeral shaft fracture advantageous compared with the conventional open technique?
No full textBackground: The minimally invasive plate osteosynthesis (MIPO) technique has been described and used effectively in humeral shaft fractures. However, the postoperative deformity resulting from malreduction with the minimally invasive technique has not received adequate attention. The purpose of this study was to evaluate the postoperative malrotation and the functional results of the MIPO technique and conventional plating in open reduction and internal fixation after humeral shaft fracture. Methods: A prospective cohort research was performed; 53 cases of humeral shaft fractures in a level I trauma center were included and allocated into group I for open reduction and internal fixation or group II for MIPO. Computed tomography was used to measure the postoperative malrotation. The status of the union, functional scoring, and muscle strength were recorded at 12 months after surgery. Results: Both groups exhibited satisfactory union results and final shoulder function scoring. Shoulder girdle musculature of both groups exhibited considerable strength loss with no obvious intergroup discrepancy, with greater internal rotation strength loss compared with external rotation. A significantly increased incidence of postoperative malrotation >20 degrees was observed in the MIPO group (40.9% vs. 0%; P < .01). A linear correlation between postoperative malrotation and range of rotation loss was observed. Conclusions: The MIPO technique might be advantageous as a cosmetic consideration; however, it did not improve postoperative function and strength restoration results more than the open technique. Moreover, MIPO was associated with greater postoperative malrotation, which was considered to be correlated with subsequent long-term shoulder degeneration. (C) 2015 Journal of Shoulder and Elbow Surgery Board of Trustees.SCI(E)[email protected]; [email protected]
Dynamic Effects of Structure-Based Forest Management on Stand Spatial Structure in a Platycladus orientalis Plantation
No full textStructure-based forest management (SBFM) is a method for improving forest structure and quality based on nearest-neighbor analysis. Stand spatial structure directly affects the health and stability of forest ecosystems. Research on the effects of SBFM on the distribution of spatial structure parameters is needed to provide a scientific basis for further development and implementation of SBFM technology in forestry. The present study was conducted on six permanent plots (20 m × 20 m) established within a Platycladus orientalis (L.) Franco plantation in Beijing, China. Changes in stand spatial structure parameters (SSSPs) were evaluated in managed and control plots at three time points: before SBFM and after 2 and 7 years of SBFM. The results showed that SBFM gradually accelerated the development of the P. orientalis plantation toward a random distribution pattern, reaching a significant difference within 2 years. SBFM promoted the growth of medium and dominant trees, with a significant difference between SBFM and control stands after 7 years. It led to a slight increase in mingling compared to the control, although no significant differences were observed between treatments. SBFM generally decreased the proportions of disadvantageous microstructures (disadvantaged trees with non-randomly distributed, disadvantaged trees with a low degree of mingling, and non-randomly distributed trees with a low degree of mingling). It also improved the ratio of torch (R2) units to dumbbell (R1) units, gradually improving the stability of the plantation forest. The results of this study suggest that SBFM optimized the spatial structure of a P. orientalis plantation in Beijing, China, and was conducive to tree growth and forest stand productivity
Orthopaedic injury analysis in the 2010 Yushu, China Earthquake
No full textObjective: By analysing the injuries of the orthopaedic wounded during the 2010 Yushu earthquake, we aim to provide useful medical information for the rational application and allocation of medical resources and better implementation of medical relief in earthquake-stricken areas. Patients and methods: Five hundred and eighty-two orthopaedic patients injured during the earthquake. The clinical data, injury conditions and epidemiological features (including age composition, gender ratio, distribution of injury, etc.) were collected and analysed. Results: Altogether 582 orthopaedic patients were analysed. The average age for all patients was 38.8 + 13.08 years (0-86 years). Adults accounted for 81.62%. There was no gender difference. The most common injuries included limb fractures, pelvic/acetabular fractures and spinal fractures. Fractures accompany with nerve injury were relatively low, only 17 patients account for 2.92%. Fractures complicated by crush syndrome were even lower, only 7 patients account for 1.20%. Conclusion: The patients who experienced fractures in the Yushu earthquake were mostly adults. This was correlated with population composition in Yushu area. This time all the orthopaedic injuries were relative mild with less complication as nerve injury or crush syndrome mainly because of the characteristics of the house structure in Yushu area. (c) 2011 Elsevier Ltd. All rights reserved.Critical Care MedicineEmergency MedicineOrthopedicsSurgerySCI(E)PubMed1ARTICLE6886-8904
Body mass index and hypertension as mediators of the association between age at menarche and subclinical atherosclerosis: a sex-specific Mendelian randomization analysis
No full textBACKGROUND: Early age at menarche (AAM) has been associated with a higher risk of carotid artery intima-media thickness (cIMT), an indicator of subclinical vascular disease, albeit the mechanisms underlying this association remain elusive. A better understanding of the relationship between AAM, modifiable cardiometabolic risk factors, and subclinical atherosclerosis may contribute to improved primary prevention and cardiovascular disease treatment. We aimed to investigate the putative causal role of AAM on cIMT, and to identify and quantify the potentially mediatory effects of cardiometabolic risk factors underlying this relationship. METHODS AND RESULTS: We conducted linkage disequilibrium score regression analyses between our exposure of interest, AAM, our outcome of interest, cIMT and potential mediators of the AAM-cIMT association to gauge cross-trait genetic overlap. We considered as mediators the modifiable anthropometric risk factors body mass index (BMI), systolic blood pressure (SBP), lipid traits (total cholesterol, triglycerides, high-density lipoprotein cholesterol, and low-density lipoprotein cholesterol), and glycemic traits (fasting glucose). We then leveraged the paradigm of Mendelian randomization to infer causality between AAM and cIMT, and to identify whether cardiometabolic risk factors served as potential mediators of this effect. Our analyses showed that genetically predicted AAM was inversely associated with cIMT, BMI, SBP, and triglycerides, and positively associated with high-density lipoprotein, low-density lipoprotein, and total cholesterol. We showed that the effect of genetically predicted AAM on cIMT may be partially mediated through BMI (20.1% [95% CI, 1.4% to 38.9%]) and SBP (13.5% [95% CI, 0.5%-26.6%]). Our cluster-specific Mendelian randomization revealed heterogeneous causal effect estimates of age at menarche on BMI and SBP. CONCLUSIONS: We highlight supporting evidence for a potential causal association between earlier AAM and cIMT, and almost one third of the effect of AAM on cIMT may be mediated by BMI and SBP. Early intervention aimed at lowering BMI and hypertension may be beneficial in reducing the risk of developing subclinical atherosclerosis due to earlier age at menarche
