The Hilbert-Huang transform （HHT） is used to analyze the time series from nine gravimeter （SG） stations and 22 broadband seismometers to investigate the anomalous signals superconducting prior to the great 2010 Ma...The Hilbert-Huang transform （HHT） is used to analyze the time series from nine gravimeter （SG） stations and 22 broadband seismometers to investigate the anomalous signals superconducting prior to the great 2010 Maule earthquake. The results show that seven SG time series and 20 broadband seismometer time series have anomalous signals lasting about one to three days before the earthquake occurrence. The anomalous signals appear around the frequency bands 0.07Hz and 0.15Hz in SG records while around the frequency band 0. 13Hz -0.2Hz in seismic records, and the reason why they appear in different bands might be attributed to the intrinsic nature and different sensitivities of different kinds of instruments. Because more than 87% records have the anomalous signals prior to the earthquake, and no typhoon event is found in our chosen time window, we may conclude that the anomalous signals might be precursory signals of the great 2010 Maule event. However, we do not rule out other possible excitation sources.展开更多
Introduction: Typical lumbar hernias are very rare surgical conditions. Lumbar hernias can be congenital or acquired. About 25% of all lumbar hernias have a traumatic etiology. Case-Report: We here reported a case of ...Introduction: Typical lumbar hernias are very rare surgical conditions. Lumbar hernias can be congenital or acquired. About 25% of all lumbar hernias have a traumatic etiology. Case-Report: We here reported a case of a 55-year-old male who was mauled by a bear. The patient developed an atypical lumbar hernia after 6 months of sustaining craniofacial and abdominal trauma. Open hernioplasty, which was a very challenging job, was done in this patient. Conclusion: Post traumatic lumbar hernias have been reported but till today no case of lumbar hernia following an attack by a bear has been reported in literature. Both acute and long-standing post-traumatic lumbar hernias are rare but challenging conditions. The corrective surgical procedure becomes more complex as hernial defect enlarges. Reconstruction is a challenging aspect of lumbar hernia surgery.展开更多
The increase in prevalence of environmental pollution, especially soil contamination with toxic metals has led to their uptake in the human food chains through plant parts. Accumulation and magnification of heavy meta...The increase in prevalence of environmental pollution, especially soil contamination with toxic metals has led to their uptake in the human food chains through plant parts. Accumulation and magnification of heavy metals in human tissues through comsuption of herbal medicine can cause hazardous impacts on health. Therefore, chemical profiling of four heavy metals (Cu, Cr, Mn and Zn) was undertaken in samples of Azorella spinosa from coast and mountain of Maule Region in Chile. The Cu, Cr, Mn and Zn concentrations were determined in plants of the species Azorella spinosa and their soils of origin. For each plant, the metal contents in the stalk, leaves and soil were determined by flame atomic absorption spectroscopy. The methodology was validated using certified reference material: BIMEP-432 for the plant samples and MESS-1 for the soil samples. The concentration ranges found in the plant tissue were: Cu: 1.2 - 62.5;Cr: 0.2 - 3.2;Mn: 188.6 - 1345.1 and Zn: 7.5 - 55.9 mg·kg-1 (dry weight). For the soil samples, the ranges were: Cu: 6.4 - 81.5;Cr: 4.6 - 50.4;Mn: 335.6 - 1936.1 and Zn: 15.6 - 65.9 mg·kg-1 (dry weight). The results were evaluated statistically (two-way ANOVA) to correlate the Cu, Cr, Mn and Zn concentrations in Azorella spinosa plant tissues with those in the soil samples from the corresponding sampling areas.展开更多
Purpose： Bear maul injuries are the most common wild animal inflicted injuries in India. More than 300 bear maul injuries report to our hospital per year. Methods： Twenty-one consecutive patients over a period of 1 ...Purpose： Bear maul injuries are the most common wild animal inflicted injuries in India. More than 300 bear maul injuries report to our hospital per year. Methods： Twenty-one consecutive patients over a period of 1 year reported to our department for orthopaedic management of bear maul injuries. All the patients were referred either from peripheral hospitals or from other surgical departments of our hospital. Results： All the patients had facial[scalp injuries of variable severity. In all the patients the severity of limb and facial trauma was inversely proportional to each other. Pattern of upper limb trauma in most of the patients was similar. Fifteen patients had either fractures of distal humerus or mid shaft/proximal forearm bone fracture. Two had distal forearm bone fracture, 2 had carpal/metacarpal fractures and I had clavicle fracture. Only I had lower limb fracture. Thirteen out of 21 patients had associated neurovascular injury of the involved limb. The characteristic feature was extensive soft tissue involvement of the affected limb. Conclusion： Upper limb injuries in bear maul patients usually have similar pattern. The severity of upper limb and facial/scalp trauma is inversely proportional to each other. Multistage orthopaedic surgeries are needed for such comolex limb injuries.展开更多
We use the Centroid Moment Tensor （CMT） solution of the earthquakes occurred in Chile subduction to analyze the characteristics of focal mechanisms. We define the,angle between P, B, and T axes of focal mechanisms a...We use the Centroid Moment Tensor （CMT） solution of the earthquakes occurred in Chile subduction to analyze the characteristics of focal mechanisms. We define the,angle between P, B, and T axes of focal mechanisms and three stress axes of tectonic stress field as the consistency parameter, to research the dynamic changes of focal mechanism pattern in earthquake preparation area before the 2010 Maule, Chile earthquake. The result shows that the consistency parameter decreases before the earthquake, and the area of the lower consistent parameter visually coincides with the distribution of aftershocks. This phenomenon is similar to the Load-Unload Response Ratio （LURR） decreases prior to the occurrence of macro-fracture happened in the acoustic emission experiments involving large rock specimens under tri-axial stress.展开更多
基金supported by the National Natural Science Foundation of China(41174011,41128003,41021061,40974015)National l973 Project(2013CB733305)the Fundamental Research Funds for the Central Universities(2012214020203)
文摘The Hilbert-Huang transform （HHT） is used to analyze the time series from nine gravimeter （SG） stations and 22 broadband seismometers to investigate the anomalous signals superconducting prior to the great 2010 Maule earthquake. The results show that seven SG time series and 20 broadband seismometer time series have anomalous signals lasting about one to three days before the earthquake occurrence. The anomalous signals appear around the frequency bands 0.07Hz and 0.15Hz in SG records while around the frequency band 0. 13Hz -0.2Hz in seismic records, and the reason why they appear in different bands might be attributed to the intrinsic nature and different sensitivities of different kinds of instruments. Because more than 87% records have the anomalous signals prior to the earthquake, and no typhoon event is found in our chosen time window, we may conclude that the anomalous signals might be precursory signals of the great 2010 Maule event. However, we do not rule out other possible excitation sources.
文摘Introduction: Typical lumbar hernias are very rare surgical conditions. Lumbar hernias can be congenital or acquired. About 25% of all lumbar hernias have a traumatic etiology. Case-Report: We here reported a case of a 55-year-old male who was mauled by a bear. The patient developed an atypical lumbar hernia after 6 months of sustaining craniofacial and abdominal trauma. Open hernioplasty, which was a very challenging job, was done in this patient. Conclusion: Post traumatic lumbar hernias have been reported but till today no case of lumbar hernia following an attack by a bear has been reported in literature. Both acute and long-standing post-traumatic lumbar hernias are rare but challenging conditions. The corrective surgical procedure becomes more complex as hernial defect enlarges. Reconstruction is a challenging aspect of lumbar hernia surgery.
文摘The increase in prevalence of environmental pollution, especially soil contamination with toxic metals has led to their uptake in the human food chains through plant parts. Accumulation and magnification of heavy metals in human tissues through comsuption of herbal medicine can cause hazardous impacts on health. Therefore, chemical profiling of four heavy metals (Cu, Cr, Mn and Zn) was undertaken in samples of Azorella spinosa from coast and mountain of Maule Region in Chile. The Cu, Cr, Mn and Zn concentrations were determined in plants of the species Azorella spinosa and their soils of origin. For each plant, the metal contents in the stalk, leaves and soil were determined by flame atomic absorption spectroscopy. The methodology was validated using certified reference material: BIMEP-432 for the plant samples and MESS-1 for the soil samples. The concentration ranges found in the plant tissue were: Cu: 1.2 - 62.5;Cr: 0.2 - 3.2;Mn: 188.6 - 1345.1 and Zn: 7.5 - 55.9 mg·kg-1 (dry weight). For the soil samples, the ranges were: Cu: 6.4 - 81.5;Cr: 4.6 - 50.4;Mn: 335.6 - 1936.1 and Zn: 15.6 - 65.9 mg·kg-1 (dry weight). The results were evaluated statistically (two-way ANOVA) to correlate the Cu, Cr, Mn and Zn concentrations in Azorella spinosa plant tissues with those in the soil samples from the corresponding sampling areas.
文摘Purpose： Bear maul injuries are the most common wild animal inflicted injuries in India. More than 300 bear maul injuries report to our hospital per year. Methods： Twenty-one consecutive patients over a period of 1 year reported to our department for orthopaedic management of bear maul injuries. All the patients were referred either from peripheral hospitals or from other surgical departments of our hospital. Results： All the patients had facial[scalp injuries of variable severity. In all the patients the severity of limb and facial trauma was inversely proportional to each other. Pattern of upper limb trauma in most of the patients was similar. Fifteen patients had either fractures of distal humerus or mid shaft/proximal forearm bone fracture. Two had distal forearm bone fracture, 2 had carpal/metacarpal fractures and I had clavicle fracture. Only I had lower limb fracture. Thirteen out of 21 patients had associated neurovascular injury of the involved limb. The characteristic feature was extensive soft tissue involvement of the affected limb. Conclusion： Upper limb injuries in bear maul patients usually have similar pattern. The severity of upper limb and facial/scalp trauma is inversely proportional to each other. Multistage orthopaedic surgeries are needed for such comolex limb injuries.
基金supported by Public Utility Research Project (200808053)Research Foundation of Science and Technology Plan Project in Hebei Province (12276903D)
文摘We use the Centroid Moment Tensor （CMT） solution of the earthquakes occurred in Chile subduction to analyze the characteristics of focal mechanisms. We define the,angle between P, B, and T axes of focal mechanisms and three stress axes of tectonic stress field as the consistency parameter, to research the dynamic changes of focal mechanism pattern in earthquake preparation area before the 2010 Maule, Chile earthquake. The result shows that the consistency parameter decreases before the earthquake, and the area of the lower consistent parameter visually coincides with the distribution of aftershocks. This phenomenon is similar to the Load-Unload Response Ratio （LURR） decreases prior to the occurrence of macro-fracture happened in the acoustic emission experiments involving large rock specimens under tri-axial stress.
