To study the effects of bubbles (or cavities) collapse on a solid surface, a rotating disk device was used here to create bubbles (or bubbles) in water. In the apparatus, these bubbles are led to collapse on the surfa...To study the effects of bubbles (or cavities) collapse on a solid surface, a rotating disk device was used here to create bubbles (or bubbles) in water. In the apparatus, these bubbles are led to collapse on the surface of carbon steel (commonly used in structures and machine impellers), and so related to higher costs for the hydraulic machines industry when damaged by such phenomenon, for example. After that, the specimens are observed with the aid of a scanning electronic microscope, where the damages on the specimens are analyzed showing pits and approximate circular areas on their surfaces. An explanation is presented here, based on collapse simulations (for qualitative purposes) and their result using images of the specimens after the collapses to visualize the damages caused by prints on their surface. The pits are certainly made by liquid micro-jet impingement while the areas, showing some aspects of burning, are credited to the high temperature impaction of the bubble contents in the final stages of its collapse.展开更多
Masquerade culture is an essential part of Sekondi-Takoradi cultural embodiment. The masquerade festival titled Ankos displays interesting costumes that have artistic elements of potent colour display and performances...Masquerade culture is an essential part of Sekondi-Takoradi cultural embodiment. The masquerade festival titled Ankos displays interesting costumes that have artistic elements of potent colour display and performances. The masquerade costumes manifest intricate fabric decoration techniques for example pleating, folding, gathering, smocking, hand and machine stitching and the use of varied colour schemes. These decorative techniques make costume production laborious, tedious and downtime constraints. In contributing to the innovative approaches to creating textile designs and prints, the study explored the inspirational possibilities of surface designs of the masquerade costume for textile designs and prints. The art-based research design and direct observation as research instrumentation were employed in the artistic creation for the study. Adobe Photoshop was used in the simulation design processes. The study revealed that the simulation design processes produced an innovative imitated visual appearance of the masquerade costume and production processes from a machine-stitched work to a hand-printed fabric. It is recommended that costume makers adopt the contemporary possibility of using hand screen to print hitherto the traditional laborious and tedious process of producing masquerade costumes.展开更多
This paper is about New-Year woodcut prints done in the Taohuawu area of Suzhou in the Chinese Ming and Qing periods that influenced Edo period ukiyo-e. And Japanese ukiyo-e impacted Western Post-Impressionism. The su...This paper is about New-Year woodcut prints done in the Taohuawu area of Suzhou in the Chinese Ming and Qing periods that influenced Edo period ukiyo-e. And Japanese ukiyo-e impacted Western Post-Impressionism. The subject matters of Taohuawu en gravings came from Chinese folk life, and were highly decorative. The engravings were reasonably inexpensive for ordinary people. This art form influenced ukiyo-e directly. As a Japanese engraving expert wrote: "Chinese prints were a good model for Japanese engravings. Chi nese New-Year engravings moved Japanese ukiyo-e artists so much that the new idea of ukiyo-e was influenced largely by them." [1]展开更多
Limited by the sensitivity of laboratory techniques,conventional human DNA analysis of touch DNA on frequently used items and prints does not always provide satisfactory results.In this study,microbiome DNA on persona...Limited by the sensitivity of laboratory techniques,conventional human DNA analysis of touch DNA on frequently used items and prints does not always provide satisfactory results.In this study,microbiome DNA on personal computers,cell phones,and palm prints was analyzed and compared.After sample collection,DNA extraction,polymerase chain reaction amplification,library preparation,and sequencing,data were analyzed using the QIIME 1.8.0 software.Weighted unifrac distance between the right palm skin and the right side of a keyboard,the right palm skin and the mouse,and the left side of the keyboard and the left palm skin was 0.258850,0.265474,and 0.214098,respectively.Even after palm prints were left for 1 week,microbial community structures were still quite similar to those of samples collected from the palm skin on the day they were left(weighted unifrac distance was 0.270885).展开更多
BEFORE coming to China in 1986, I had spent months collecting all sorts of information on China and asking Chinese friends of mine about their everyday lives. So I felt fairly well informed before my trip. But when I ...BEFORE coming to China in 1986, I had spent months collecting all sorts of information on China and asking Chinese friends of mine about their everyday lives. So I felt fairly well informed before my trip. But when I landed in China, I was a bit disappointed. Everyihing looked so Western here. Of course, in Germany you never see a man kill a hen in the street for lunch or cabbages stacked on the sidewalk to dry in the sun. But overall, China’s streets resemble those in big cities all over the world. Looking at Western-style clothing, vehicles and modern buildings, somehow I missed the Chinese flair. I knew about China’s modernization drive, but I was展开更多
While the rising sun shines over each and every household/People would put up new peach wood charm for the old.These two poetic lines describe how people replace old woodblock prints for the coming New Year.To welcome...While the rising sun shines over each and every household/People would put up new peach wood charm for the old.These two poetic lines describe how people replace old woodblock prints for the coming New Year.To welcome the coming spring,a ceremony was held in the compound of the Beijing People’s Association for Friendship with Foreign Countries(BPAFFC)on Jan 8 for the China-展开更多
Lasers and alternate light sources have been recognized as effective tools for latent print detection for over three decades.Luminescence often increases friction ridge contrast to reveal impressions otherwise undetec...Lasers and alternate light sources have been recognized as effective tools for latent print detection for over three decades.Luminescence often increases friction ridge contrast to reveal impressions otherwise undetectable.Indanedione/zinc chloride excited by a forensic light source is widely recognized as an effective process for developing latent prints on porous surfaces.This study was designed to evaluate the use of a combination of luminescence excitation and indanedione with zinc chloride to detect latent prints on stones,bricks,and similar difficult porous surfaces.The wavelengths evaluated included 400 nm(violet),447 nm(blue),532 nm(green),and 645 nm(red).Latent prints were deposited on a variety of porous surfaces including bricks,cement stones,wood,and cotton fabric,all commonly encountered at crime scenes in China.The surfaces were examined using white light(light‑emitting diode flashlight)and laser light sources separately,both before and after treatment with indanedione/zinc chloride.The goal of this study was to evaluate various light sources for their effectiveness in detecting impressions developed by indanedione/zinc chloride on difficult porous surfaces.Results indicated that latent prints on some brick and cement stone surfaces may be effectively detected using 532 nm laser excitation after indanedione/zinc chloride processing.展开更多
Background:A comparison of the finger and toe ridge patterns can reveal their genetic interdependence.This cross‑sectional study aimed at analyzing and correlating the corresponding finger and toe ridge counts.Materia...Background:A comparison of the finger and toe ridge patterns can reveal their genetic interdependence.This cross‑sectional study aimed at analyzing and correlating the corresponding finger and toe ridge counts.Materials and Methods:The hands and feet of 100 subjects(50 males and 50 females)from the Anioma tribe of Nigeria were scanned with Hewlett placard G4010 photo scanner following ethical approval.Evaluation of the finger and toe prints was carried out using AutoCAD version 2010.Data were analyzed using the Statistical Package of the Social Sciences version 23 and presented using descriptive statistics.Chi‑square test was used to test for association between nonparametric variables while Pearson’s correlation was used to assess for the relationship between corresponding finger and toe ridge counts.P<0.05 was considered statistically significant.Results:The predominant finger and toe ridge patterns were loops(73%,79.7%)followed by arches(18.4%,15.1%)and finally whorls(8.6%,5.2%).There was a significant association between gender and the combined print patterns of all the five digits on a limb(P≤0.05).A significant positive correlation existed between the mean ridge counts of some of the corresponding fingers and toes in females.This correlation was weak in the corresponding 1st right and 1st and 3^(rd)left digits(0<r<0.5)(P≤0.05)and strong in the corresponding 3^(rd)to 5^(th)right digits and 2^(nd),4^(th),and 5^(th)left digits(0.5≤r<1)(P≤0.05).Conclusion:The study has clearly shown that sexual dimorphism is displayed only by a combination of the print patterns in all digits of a limb as against individual digits.Using correlation of digital mean ridge counts,the right 3^(rd)to 5^(th)and the left 2^(nd),4^(th),and 5^(th)digits from either the hand or the foot in females can be used to predict the corresponding digit among the Anioma people of Nigeria,hence their importance in forensic sciences.展开更多
As surgical procedures transition from conventional resection to advanced tissue-regeneration technologies,human disease therapy has witnessed a great leap forward.In particular,three-dimensional(3D)bioprinting stands...As surgical procedures transition from conventional resection to advanced tissue-regeneration technologies,human disease therapy has witnessed a great leap forward.In particular,three-dimensional(3D)bioprinting stands as a landmark in this setting,by promising the precise integration of biomaterials,cells,and bioactive molecules,thus opening up a novel avenue for tissue/organ regeneration.Curated by the editorial board of Bio-Design and Manufacturing,this review brings together a cohort of leading young scientists in China to dissect the core functionalities and evolutionary trajectory of 3D bioprinting,by elucidating the intricate challenges encountered in the manufacturing of transplantable organs.We further delve into the translational pathway from scientific research to clinical application,emphasizing the imperativeness of establishing a regulatory framework and rigorously enforcing quality-control measures.Finally,this review outlines the strategic landscape and innovative achievements of China in this field and provides a comprehensive roadmap for researchers worldwide to propel this field collectively to even greater heights.展开更多
The poor surface conditions and osseointegration capacity of 3D printed Ti6Al4V implants(3DPT)significantly influence their performance as orthopedic and dental implants.In this work,we creatively introduce a one-step...The poor surface conditions and osseointegration capacity of 3D printed Ti6Al4V implants(3DPT)significantly influence their performance as orthopedic and dental implants.In this work,we creatively introduce a one-step femtosecond laser treatment to improve the surface conditions and osteointegration.The surface characterization,mechanical properties,corrosion resistance,and biological responses were investigated.These results found that femtosecond laser eliminated defects like embedded powders and superficial cracks while forming the nano cones-like structures surface on 3DPT,leading to enhanced osseointegration,anti-corrosion,and anti-fatigue performance.Molecular dynamics simulations revealed the ablation removal mechanism and the formation of nano cone-like structures.These findings were further supported by the in vivo studies,showing that the FS-treated implants had superior bone-implant contact and osseointegration.Hence,the one-step femtosecond laser method is regarded as a promising surface modification method for improving the functional performance of Ti-based orthopedic implants.展开更多
Super-fine electrohydrodynamic inkjet(SIJ)printing of perovskite nanocrystal(PNC)colloid ink exhibits significant potential in the fabrication of high-resolution color conversion microstructures arrays for fullcolor m...Super-fine electrohydrodynamic inkjet(SIJ)printing of perovskite nanocrystal(PNC)colloid ink exhibits significant potential in the fabrication of high-resolution color conversion microstructures arrays for fullcolor micro-LED displays.However,the impact of solvent on both the printing process and the morphology of SIJ-printed PNC color conversion microstructures remains underexplored.In this study,we prepared samples of CsPbBr3PNC colloid inks in various solvents and investigated the solvent's impact on SIJ printed PNC microstructures.Our findings reveal that the boiling point of the solvent is crucial to the SIJ printing process of PNC colloid inks.Only does the boiling point of the solvent fall in the optimal range,the regular positioned,micron-scaled,conical PNC microstructures can be successfully printed.Below this optimal range,the ink is unable to be ejected from the nozzle;while above this range,irregular positioned microstructures with nanoscale height and coffee-ring-like morphology are produced.Based on these observations,high-resolution color conversion PNC microstructures were effectively prepared using SIJ printing of PNC colloid ink dispersed in dimethylbenzene solvent.展开更多
文摘To study the effects of bubbles (or cavities) collapse on a solid surface, a rotating disk device was used here to create bubbles (or bubbles) in water. In the apparatus, these bubbles are led to collapse on the surface of carbon steel (commonly used in structures and machine impellers), and so related to higher costs for the hydraulic machines industry when damaged by such phenomenon, for example. After that, the specimens are observed with the aid of a scanning electronic microscope, where the damages on the specimens are analyzed showing pits and approximate circular areas on their surfaces. An explanation is presented here, based on collapse simulations (for qualitative purposes) and their result using images of the specimens after the collapses to visualize the damages caused by prints on their surface. The pits are certainly made by liquid micro-jet impingement while the areas, showing some aspects of burning, are credited to the high temperature impaction of the bubble contents in the final stages of its collapse.
文摘Masquerade culture is an essential part of Sekondi-Takoradi cultural embodiment. The masquerade festival titled Ankos displays interesting costumes that have artistic elements of potent colour display and performances. The masquerade costumes manifest intricate fabric decoration techniques for example pleating, folding, gathering, smocking, hand and machine stitching and the use of varied colour schemes. These decorative techniques make costume production laborious, tedious and downtime constraints. In contributing to the innovative approaches to creating textile designs and prints, the study explored the inspirational possibilities of surface designs of the masquerade costume for textile designs and prints. The art-based research design and direct observation as research instrumentation were employed in the artistic creation for the study. Adobe Photoshop was used in the simulation design processes. The study revealed that the simulation design processes produced an innovative imitated visual appearance of the masquerade costume and production processes from a machine-stitched work to a hand-printed fabric. It is recommended that costume makers adopt the contemporary possibility of using hand screen to print hitherto the traditional laborious and tedious process of producing masquerade costumes.
文摘This paper is about New-Year woodcut prints done in the Taohuawu area of Suzhou in the Chinese Ming and Qing periods that influenced Edo period ukiyo-e. And Japanese ukiyo-e impacted Western Post-Impressionism. The subject matters of Taohuawu en gravings came from Chinese folk life, and were highly decorative. The engravings were reasonably inexpensive for ordinary people. This art form influenced ukiyo-e directly. As a Japanese engraving expert wrote: "Chinese prints were a good model for Japanese engravings. Chi nese New-Year engravings moved Japanese ukiyo-e artists so much that the new idea of ukiyo-e was influenced largely by them." [1]
基金This work has received funding from the State Key Laboratory of Pathogen and Biosecurity(xxhz201510)Shanghai Research Institute of Criminal Science and Technology(2014XCWZK14).
文摘Limited by the sensitivity of laboratory techniques,conventional human DNA analysis of touch DNA on frequently used items and prints does not always provide satisfactory results.In this study,microbiome DNA on personal computers,cell phones,and palm prints was analyzed and compared.After sample collection,DNA extraction,polymerase chain reaction amplification,library preparation,and sequencing,data were analyzed using the QIIME 1.8.0 software.Weighted unifrac distance between the right palm skin and the right side of a keyboard,the right palm skin and the mouse,and the left side of the keyboard and the left palm skin was 0.258850,0.265474,and 0.214098,respectively.Even after palm prints were left for 1 week,microbial community structures were still quite similar to those of samples collected from the palm skin on the day they were left(weighted unifrac distance was 0.270885).
文摘BEFORE coming to China in 1986, I had spent months collecting all sorts of information on China and asking Chinese friends of mine about their everyday lives. So I felt fairly well informed before my trip. But when I landed in China, I was a bit disappointed. Everyihing looked so Western here. Of course, in Germany you never see a man kill a hen in the street for lunch or cabbages stacked on the sidewalk to dry in the sun. But overall, China’s streets resemble those in big cities all over the world. Looking at Western-style clothing, vehicles and modern buildings, somehow I missed the Chinese flair. I knew about China’s modernization drive, but I was
文摘While the rising sun shines over each and every household/People would put up new peach wood charm for the old.These two poetic lines describe how people replace old woodblock prints for the coming New Year.To welcome the coming spring,a ceremony was held in the compound of the Beijing People’s Association for Friendship with Foreign Countries(BPAFFC)on Jan 8 for the China-
基金supported by Award number 2016XCWZK09 funded by Shanghai Key Laboratory of Crime Scene Evidence.
文摘Lasers and alternate light sources have been recognized as effective tools for latent print detection for over three decades.Luminescence often increases friction ridge contrast to reveal impressions otherwise undetectable.Indanedione/zinc chloride excited by a forensic light source is widely recognized as an effective process for developing latent prints on porous surfaces.This study was designed to evaluate the use of a combination of luminescence excitation and indanedione with zinc chloride to detect latent prints on stones,bricks,and similar difficult porous surfaces.The wavelengths evaluated included 400 nm(violet),447 nm(blue),532 nm(green),and 645 nm(red).Latent prints were deposited on a variety of porous surfaces including bricks,cement stones,wood,and cotton fabric,all commonly encountered at crime scenes in China.The surfaces were examined using white light(light‑emitting diode flashlight)and laser light sources separately,both before and after treatment with indanedione/zinc chloride.The goal of this study was to evaluate various light sources for their effectiveness in detecting impressions developed by indanedione/zinc chloride on difficult porous surfaces.Results indicated that latent prints on some brick and cement stone surfaces may be effectively detected using 532 nm laser excitation after indanedione/zinc chloride processing.
文摘Background:A comparison of the finger and toe ridge patterns can reveal their genetic interdependence.This cross‑sectional study aimed at analyzing and correlating the corresponding finger and toe ridge counts.Materials and Methods:The hands and feet of 100 subjects(50 males and 50 females)from the Anioma tribe of Nigeria were scanned with Hewlett placard G4010 photo scanner following ethical approval.Evaluation of the finger and toe prints was carried out using AutoCAD version 2010.Data were analyzed using the Statistical Package of the Social Sciences version 23 and presented using descriptive statistics.Chi‑square test was used to test for association between nonparametric variables while Pearson’s correlation was used to assess for the relationship between corresponding finger and toe ridge counts.P<0.05 was considered statistically significant.Results:The predominant finger and toe ridge patterns were loops(73%,79.7%)followed by arches(18.4%,15.1%)and finally whorls(8.6%,5.2%).There was a significant association between gender and the combined print patterns of all the five digits on a limb(P≤0.05).A significant positive correlation existed between the mean ridge counts of some of the corresponding fingers and toes in females.This correlation was weak in the corresponding 1st right and 1st and 3^(rd)left digits(0<r<0.5)(P≤0.05)and strong in the corresponding 3^(rd)to 5^(th)right digits and 2^(nd),4^(th),and 5^(th)left digits(0.5≤r<1)(P≤0.05).Conclusion:The study has clearly shown that sexual dimorphism is displayed only by a combination of the print patterns in all digits of a limb as against individual digits.Using correlation of digital mean ridge counts,the right 3^(rd)to 5^(th)and the left 2^(nd),4^(th),and 5^(th)digits from either the hand or the foot in females can be used to predict the corresponding digit among the Anioma people of Nigeria,hence their importance in forensic sciences.
基金supported by the National Natural Science Foundation of China(Nos.52325504,52235007,and T2121004).
文摘As surgical procedures transition from conventional resection to advanced tissue-regeneration technologies,human disease therapy has witnessed a great leap forward.In particular,three-dimensional(3D)bioprinting stands as a landmark in this setting,by promising the precise integration of biomaterials,cells,and bioactive molecules,thus opening up a novel avenue for tissue/organ regeneration.Curated by the editorial board of Bio-Design and Manufacturing,this review brings together a cohort of leading young scientists in China to dissect the core functionalities and evolutionary trajectory of 3D bioprinting,by elucidating the intricate challenges encountered in the manufacturing of transplantable organs.We further delve into the translational pathway from scientific research to clinical application,emphasizing the imperativeness of establishing a regulatory framework and rigorously enforcing quality-control measures.Finally,this review outlines the strategic landscape and innovative achievements of China in this field and provides a comprehensive roadmap for researchers worldwide to propel this field collectively to even greater heights.
基金supported by the National Natural Science Foundation of China(No.U21A2055),Natural Science Foundation of Tianjin of China(No.21JCQNJC01280)Tianjin Key R&D Program Beijing-Tianjin-Hebei Collaborative Innovation Project(No.22YFXTHZ00120).
文摘The poor surface conditions and osseointegration capacity of 3D printed Ti6Al4V implants(3DPT)significantly influence their performance as orthopedic and dental implants.In this work,we creatively introduce a one-step femtosecond laser treatment to improve the surface conditions and osteointegration.The surface characterization,mechanical properties,corrosion resistance,and biological responses were investigated.These results found that femtosecond laser eliminated defects like embedded powders and superficial cracks while forming the nano cones-like structures surface on 3DPT,leading to enhanced osseointegration,anti-corrosion,and anti-fatigue performance.Molecular dynamics simulations revealed the ablation removal mechanism and the formation of nano cone-like structures.These findings were further supported by the in vivo studies,showing that the FS-treated implants had superior bone-implant contact and osseointegration.Hence,the one-step femtosecond laser method is regarded as a promising surface modification method for improving the functional performance of Ti-based orthopedic implants.
基金supported by the National Natural Science Foundation of China(No.62374142)Fundamental Research Funds for the Central Universities(Nos.20720220085 and 20720240064)+2 种基金External Cooperation Program of Fujian(No.2022I0004)Major Science and Technology Project of Xiamen in China(No.3502Z20191015)Xiamen Natural Science Foundation Youth Project(No.3502Z202471002)。
文摘Super-fine electrohydrodynamic inkjet(SIJ)printing of perovskite nanocrystal(PNC)colloid ink exhibits significant potential in the fabrication of high-resolution color conversion microstructures arrays for fullcolor micro-LED displays.However,the impact of solvent on both the printing process and the morphology of SIJ-printed PNC color conversion microstructures remains underexplored.In this study,we prepared samples of CsPbBr3PNC colloid inks in various solvents and investigated the solvent's impact on SIJ printed PNC microstructures.Our findings reveal that the boiling point of the solvent is crucial to the SIJ printing process of PNC colloid inks.Only does the boiling point of the solvent fall in the optimal range,the regular positioned,micron-scaled,conical PNC microstructures can be successfully printed.Below this optimal range,the ink is unable to be ejected from the nozzle;while above this range,irregular positioned microstructures with nanoscale height and coffee-ring-like morphology are produced.Based on these observations,high-resolution color conversion PNC microstructures were effectively prepared using SIJ printing of PNC colloid ink dispersed in dimethylbenzene solvent.
