The maximum entropy spectral characteristics of seismicity in the seismic enhanced region of 11 great earthquakes is analysed in this paper to seek the difference of seismic period spectral structure between the norm...The maximum entropy spectral characteristics of seismicity in the seismic enhanced region of 11 great earthquakes is analysed in this paper to seek the difference of seismic period spectral structure between the normal and the abnormal stage of seismic activity in this paper. The results show that, during decades or even one hundred years before great earthquakes, only short periods with 6.5～24.3 years appear, and long ones disappear. Otherwise, long periods with 18.5～38.5 years exist chiefly within the normal stages. Decades years after great earthquakes, the period spectra of seismicity are generally about several or ten years. Then the characteristics of great earthquakes is explained physically by applying the strong body seismogenic model, so a method of studying and predicting great earthquakes is offered.展开更多
BACKGROUND Corrected transposition of the great arteries(cTGA) is a cardiac malformation in which the ventricular and arterial-ventricular positions in the heart are doubly reversed.In general,this defect puts a load ...BACKGROUND Corrected transposition of the great arteries(cTGA) is a cardiac malformation in which the ventricular and arterial-ventricular positions in the heart are doubly reversed.In general,this defect puts a load on the systemic circulation and causes heart failure,resulting in a poor prognosis.This article reports a case of cTGA detected in a patient with post-caesarean pregnancy who had undergone elective caesarean section and was experiencing an episode of acute heart failure.CASE SUMMARY This was the case of a 36-year-old gravida 3 para 1 woman.No problems were noted in the puerperal course following the previous pregnancy.The current pregnancy was also uneventful.An elective caesarean section was performed and the patient was discharged from the hospital 7 d after the operation.On postoperative day 18,the patient became aware of breathing difficulty and presented at a nearby clinic,where she was referred to our institution after bilateral pleural effusions were detected.She was then diagnosed with acute heart failure after noting the presence of a prominent pedal oedema and SpO_(2) 91%(supine position and room air);the patient was promptly hospitalised for close examination and treatment.Although chest computed tomography revealed the presence of cTGA,no other cardiac malformations were observed.Owing to improvements in both the pedal oedema and pleural effusions,the patient was discharged on day 9.CONCLUSION Close examination should be performed on the premise of congenital cardiac malformation when heart failure symptoms are noted during perinatal control.展开更多
Wherever the first life originated, the Earth has grown organisms. The Earth provides life with all the basicelements required for the composition and growth of life. And of more importance is that the Earth has
Distinctive white laminations appear in the black sediments of the Great Ghost Lake in Taiwan.Compared with the black sediments, these white laminations have lower porosity, organic matter content and C/N ra-tio, but ...Distinctive white laminations appear in the black sediments of the Great Ghost Lake in Taiwan.Compared with the black sediments, these white laminations have lower porosity, organic matter content and C/N ra-tio, but higher C/S and N/S ratios, and with organic matter characterized by the phytoplanktons. It suggests thatthey may be deposited in cooler and drier periods. The organic matter of the black sediments was mainiy from landplants, suggesting deposition under warmer and wetter climates. Major white laminations appear in 0 AD, 500 AD,70D AD, 900 AD, 1 350 AD, 1 500 AD, etc., and cortespond to the periods of cold/dry and frequent dust stormsfrom the historical and natural records of China or Peru. These seem to reflect large-scale climatic changes.展开更多
文摘The maximum entropy spectral characteristics of seismicity in the seismic enhanced region of 11 great earthquakes is analysed in this paper to seek the difference of seismic period spectral structure between the normal and the abnormal stage of seismic activity in this paper. The results show that, during decades or even one hundred years before great earthquakes, only short periods with 6.5～24.3 years appear, and long ones disappear. Otherwise, long periods with 18.5～38.5 years exist chiefly within the normal stages. Decades years after great earthquakes, the period spectra of seismicity are generally about several or ten years. Then the characteristics of great earthquakes is explained physically by applying the strong body seismogenic model, so a method of studying and predicting great earthquakes is offered.
文摘BACKGROUND Corrected transposition of the great arteries(cTGA) is a cardiac malformation in which the ventricular and arterial-ventricular positions in the heart are doubly reversed.In general,this defect puts a load on the systemic circulation and causes heart failure,resulting in a poor prognosis.This article reports a case of cTGA detected in a patient with post-caesarean pregnancy who had undergone elective caesarean section and was experiencing an episode of acute heart failure.CASE SUMMARY This was the case of a 36-year-old gravida 3 para 1 woman.No problems were noted in the puerperal course following the previous pregnancy.The current pregnancy was also uneventful.An elective caesarean section was performed and the patient was discharged from the hospital 7 d after the operation.On postoperative day 18,the patient became aware of breathing difficulty and presented at a nearby clinic,where she was referred to our institution after bilateral pleural effusions were detected.She was then diagnosed with acute heart failure after noting the presence of a prominent pedal oedema and SpO_(2) 91%(supine position and room air);the patient was promptly hospitalised for close examination and treatment.Although chest computed tomography revealed the presence of cTGA,no other cardiac malformations were observed.Owing to improvements in both the pedal oedema and pleural effusions,the patient was discharged on day 9.CONCLUSION Close examination should be performed on the premise of congenital cardiac malformation when heart failure symptoms are noted during perinatal control.
文摘Wherever the first life originated, the Earth has grown organisms. The Earth provides life with all the basicelements required for the composition and growth of life. And of more importance is that the Earth has
文摘Distinctive white laminations appear in the black sediments of the Great Ghost Lake in Taiwan.Compared with the black sediments, these white laminations have lower porosity, organic matter content and C/N ra-tio, but higher C/S and N/S ratios, and with organic matter characterized by the phytoplanktons. It suggests thatthey may be deposited in cooler and drier periods. The organic matter of the black sediments was mainiy from landplants, suggesting deposition under warmer and wetter climates. Major white laminations appear in 0 AD, 500 AD,70D AD, 900 AD, 1 350 AD, 1 500 AD, etc., and cortespond to the periods of cold/dry and frequent dust stormsfrom the historical and natural records of China or Peru. These seem to reflect large-scale climatic changes.
