Taking the sociopetal space with high using rate and welcomed by visitors in Jingxiu Park of Baoding as the study object,human demands on spatial characteristics and space factors were evaluated by the method of POE,a...Taking the sociopetal space with high using rate and welcomed by visitors in Jingxiu Park of Baoding as the study object,human demands on spatial characteristics and space factors were evaluated by the method of POE,and modification measures of the sociopetal space in city opening park were put forward,which provided evidence for solving regional problems of city park and creating urban open space.展开更多
The effects of different post-space pretreatments on the retentive force of fiber posts cemented with a self-adhesive resin cement were investigated. Twenty-eight single-canal premolars were obturated by Resilon using...The effects of different post-space pretreatments on the retentive force of fiber posts cemented with a self-adhesive resin cement were investigated. Twenty-eight single-canal premolars were obturated by Resilon using warm vertical compaction and treated with distilled water, 2.5% NaOCl, 17% EDTA and 2.5% NaOCI; or 17% EDTA, 2.5% NaOCI, and ultrasonic agitation （U/E/N treatment）. Subsequently, radicular dentin surfaces were observed under scanning electron microscopy （SEM）. RelyX Fiber Posts were cemented in the treated canals by using RelyX U100, and thin-slice push-out test and SEM observation of coronal and apical regions of the specimens were performed. Data were analyzed using two-way ANOVA and Tukey＇s HSD post- hoc tests, and the percentage of failure type was calculated. Ultrasonic/EDTA/NaOC1 irrigation showed the maximum effectiveness in removing the smear layer and debris on the dentin surface. The apical bond strength of the experimental groups was significantly higher than that of the control group （P〈 0.05）. Adhesive failure between cement and dentin was the most common mode of failure. No obvious RDIZ or resin tag was detected. Chemical irrigants facilitated the bonding of these fiber posts, and ultrasonic activation improved retention. Future studies should evaluate the effectiveness of irrigation on fiber post push-out strength in fatigue cycling condition.展开更多
Taking the Donghaochong River as a study case, the environmental evolution process and spatial characteristics of Donghaochong River are analyzed through field investigation, questionnaire and in-depth interview in th...Taking the Donghaochong River as a study case, the environmental evolution process and spatial characteristics of Donghaochong River are analyzed through field investigation, questionnaire and in-depth interview in the context of urban renewal and combining relevant historical documents and statistical data. From the perspective of users, the behavior characteristics and use demand of surrounding users for waterfront space of Donghaochong River in Guangzhou City and the evaluation of usage situation before and after reconstruction of Donghaochong River are summarized to provide relevant optimization suggestions for the creation of satisfactory waterfront landscape environment for users.展开更多
With the deepening of the globalization,citizens have realized the mega-cities space elements largely through media,instead of all-over contact with real physical environment,and dominance hierarchy of urban functions...With the deepening of the globalization,citizens have realized the mega-cities space elements largely through media,instead of all-over contact with real physical environment,and dominance hierarchy of urban functions constructed by all media has represented certain groups’selective transmission of space images.Taking downtown areas of Shanghai City for example,this study explored space images embodied in internet media on the basis of statistical analysis of place name frequency in the media texts.First,by reviewing relevant theories of media languages and city space image,media-based methods for collecting and analyzing space image were reviewed and sorted out,and theoretical bases for the space images embodied by different media were established and compared.Second,in empirical researches,word frequency of place names in economic news texts was calculated in terms of landmark constructions/buildings,roads,rivers,and sections,spatial accumulative calculation was adopted to describe space images of downtown areas in Shanghai.Third,differences and similarities of space images of these downtown areas in economic news reports and citizens’internet posts were further compared.展开更多
Objectives: To evaluate the efficacy of post placental IUD insertion during cesarean section. Background: IUD could be applied to the female after delivery of placenta during cesarean section, it had many advantages a...Objectives: To evaluate the efficacy of post placental IUD insertion during cesarean section. Background: IUD could be applied to the female after delivery of placenta during cesarean section, it had many advantages as the female is under anesthesia so no extra manipulation needed, decrease pain, and also the female at the period of delivery had high motive for family planning. Post placental IUD insertion also had many disengages like bleeding and displacement. Material and methods: A randomized controlled study was conducted at tertiary care hospital (Tanta University Hospital) in the period from Jan, 1, 2017 to May 31 2019. Two groups of patients were selected;each group included 60 patients with desire of birth control. The group I was subjected to post-placental intrauterine device (IUD) insertion during cesarean section and group II was subjected to interval IUD insertion (3 months after cesarean delivery). The type of IUD used was cupper-T IUD, both groups were assessed as regard to time of cesarean section (CS), amount of postoperative bleeding, postoperative pain, occurrence of infection, any displacement of IUDs, failure of contraception and patients’ satisfaction. Results: The demographic data were comparable in both groups. The duration of cesarean surgery was slightly prolonged in the study group. The infection, puerperal bleeding, and displacement of IUDs were not significantly different in both groups. The discontinuation rate after 12 months was 13.72% in study group compared to 16.66% in the control group. The satisfaction rates in both groups were 90.20%, 91.67% in study and control groups respectively. The expulsion rates were 3.92% and 0.00% in the study and control groups respectively. Pregnancy on top of IUD was 1.96% in study group and 4.17% in control group with p value = 0.949. Conclusion: Post-placental IUD insertion is found to be safe, easily applied during cesarean section with slight prolongation of cesarean section duration. Post-placental IUD insertion is also effective, with few complications compared to interval IUD insertion. This modality of insertion was accepted by the great majority of patients being painless and at the same time of surgery with no added cost or maneuver and utilizing the enthusiasm of patients for immediate contraception. The continuation rates are good in the study follow up duration.展开更多
文摘Taking the sociopetal space with high using rate and welcomed by visitors in Jingxiu Park of Baoding as the study object,human demands on spatial characteristics and space factors were evaluated by the method of POE,and modification measures of the sociopetal space in city opening park were put forward,which provided evidence for solving regional problems of city park and creating urban open space.
基金Funded by the National Natural Science Foundation of China(No.H1408)
文摘The effects of different post-space pretreatments on the retentive force of fiber posts cemented with a self-adhesive resin cement were investigated. Twenty-eight single-canal premolars were obturated by Resilon using warm vertical compaction and treated with distilled water, 2.5% NaOCl, 17% EDTA and 2.5% NaOCI; or 17% EDTA, 2.5% NaOCI, and ultrasonic agitation （U/E/N treatment）. Subsequently, radicular dentin surfaces were observed under scanning electron microscopy （SEM）. RelyX Fiber Posts were cemented in the treated canals by using RelyX U100, and thin-slice push-out test and SEM observation of coronal and apical regions of the specimens were performed. Data were analyzed using two-way ANOVA and Tukey＇s HSD post- hoc tests, and the percentage of failure type was calculated. Ultrasonic/EDTA/NaOC1 irrigation showed the maximum effectiveness in removing the smear layer and debris on the dentin surface. The apical bond strength of the experimental groups was significantly higher than that of the control group （P〈 0.05）. Adhesive failure between cement and dentin was the most common mode of failure. No obvious RDIZ or resin tag was detected. Chemical irrigants facilitated the bonding of these fiber posts, and ultrasonic activation improved retention. Future studies should evaluate the effectiveness of irrigation on fiber post push-out strength in fatigue cycling condition.
文摘Taking the Donghaochong River as a study case, the environmental evolution process and spatial characteristics of Donghaochong River are analyzed through field investigation, questionnaire and in-depth interview in the context of urban renewal and combining relevant historical documents and statistical data. From the perspective of users, the behavior characteristics and use demand of surrounding users for waterfront space of Donghaochong River in Guangzhou City and the evaluation of usage situation before and after reconstruction of Donghaochong River are summarized to provide relevant optimization suggestions for the creation of satisfactory waterfront landscape environment for users.
基金Sponsored by State Key Social Science Program(11&ZD154)National Natural Science Fund(51108184)ndependent Project of State Key Laboratory of Subtropical Building Science(2011ZC16)
文摘With the deepening of the globalization,citizens have realized the mega-cities space elements largely through media,instead of all-over contact with real physical environment,and dominance hierarchy of urban functions constructed by all media has represented certain groups’selective transmission of space images.Taking downtown areas of Shanghai City for example,this study explored space images embodied in internet media on the basis of statistical analysis of place name frequency in the media texts.First,by reviewing relevant theories of media languages and city space image,media-based methods for collecting and analyzing space image were reviewed and sorted out,and theoretical bases for the space images embodied by different media were established and compared.Second,in empirical researches,word frequency of place names in economic news texts was calculated in terms of landmark constructions/buildings,roads,rivers,and sections,spatial accumulative calculation was adopted to describe space images of downtown areas in Shanghai.Third,differences and similarities of space images of these downtown areas in economic news reports and citizens’internet posts were further compared.
文摘Objectives: To evaluate the efficacy of post placental IUD insertion during cesarean section. Background: IUD could be applied to the female after delivery of placenta during cesarean section, it had many advantages as the female is under anesthesia so no extra manipulation needed, decrease pain, and also the female at the period of delivery had high motive for family planning. Post placental IUD insertion also had many disengages like bleeding and displacement. Material and methods: A randomized controlled study was conducted at tertiary care hospital (Tanta University Hospital) in the period from Jan, 1, 2017 to May 31 2019. Two groups of patients were selected;each group included 60 patients with desire of birth control. The group I was subjected to post-placental intrauterine device (IUD) insertion during cesarean section and group II was subjected to interval IUD insertion (3 months after cesarean delivery). The type of IUD used was cupper-T IUD, both groups were assessed as regard to time of cesarean section (CS), amount of postoperative bleeding, postoperative pain, occurrence of infection, any displacement of IUDs, failure of contraception and patients’ satisfaction. Results: The demographic data were comparable in both groups. The duration of cesarean surgery was slightly prolonged in the study group. The infection, puerperal bleeding, and displacement of IUDs were not significantly different in both groups. The discontinuation rate after 12 months was 13.72% in study group compared to 16.66% in the control group. The satisfaction rates in both groups were 90.20%, 91.67% in study and control groups respectively. The expulsion rates were 3.92% and 0.00% in the study and control groups respectively. Pregnancy on top of IUD was 1.96% in study group and 4.17% in control group with p value = 0.949. Conclusion: Post-placental IUD insertion is found to be safe, easily applied during cesarean section with slight prolongation of cesarean section duration. Post-placental IUD insertion is also effective, with few complications compared to interval IUD insertion. This modality of insertion was accepted by the great majority of patients being painless and at the same time of surgery with no added cost or maneuver and utilizing the enthusiasm of patients for immediate contraception. The continuation rates are good in the study follow up duration.
