Robert Penn Warren(1905-1989) is one of twentieth-century America's most distinguished men of letters.Honored with three Pulitzer Prizes,Warren is the only writer who has been a Pulitzer Prize winner in two differ...Robert Penn Warren(1905-1989) is one of twentieth-century America's most distinguished men of letters.Honored with three Pulitzer Prizes,Warren is the only writer who has been a Pulitzer Prize winner in two different genres-poetry and fiction.In 1986,Warren was crowned as the first American Poet Laureate.Though he is a Renaissance man of letters in many genres,the central thrust of Warren's literary career lies in the field of poetry.Love and knowledge are the two themes which penetrate his sixty years' poetic career.Based on textual analysis,applying the method of close reading,the present study intends to explore the sound patterning,metaphor,tension and the technical devices which reinforce the theme of love and knowledge in the poem of the Bearded Oaks.展开更多
Background: Overlapping of successive broods is a relatively rare breeding strategy that allows individuals to make effective use of the available reproductive window.Methods: In this paper we analyse the occurrence o...Background: Overlapping of successive broods is a relatively rare breeding strategy that allows individuals to make effective use of the available reproductive window.Methods: In this paper we analyse the occurrence of overlapping breeding attempts in the Bearded Tit(Panurus biarmicus), a non-migratory passerine species, whose peripheral populations vary enormously in numbers.Results: The colour-ringed population of Bearded Tits was studied in western Poland in 1990, 2012–2013 and 2015–2017. Overlapping broods were found only during years with low population sizes and low densities(1.2–3.6 pairs per 10 ha), and pairs with such broods constituted 11.1–20%. In years with higher population densities(8.7–13.44 pairs per 10 ha) overlapping broods were not recorded. Pairs started building the next(overlapping) nests when their young were 3–10 days old. They divided their duties while rearing two broods simultaneously: females were occupied only with the new clutch, while males, in contrast to other species with brood overlap, not only fed the young from an earlier brood, but also helped the females with the building of a new nest and incubation of a new clutch.Conclusions: Laying overlapping clutches enabled pairs to shorten their average breeding cycle by 15–21 days and produce more offspring. It is possible that overlapping breeding attempts is a density-dependant strategy, enabling the population to restore after severe declines, however, alternative explanations are also possible. Future studies are needed to better understand mechanisms underlying the occurrence of this phenomenon.展开更多
Artificial animals are increasingly used as conspecific stimuli in animal behavior research.However,researchers often have an incomplete understanding of how the species under study perceives conspecifics,and,he...Artificial animals are increasingly used as conspecific stimuli in animal behavior research.However,researchers often have an incomplete understanding of how the species under study perceives conspecifics,and,hence,which features are needed for a stimulus to be perceived appropriately.To investigate the features that bearded dragons(Pogona vitticeps)attend to,we measured their lateralized eye use when assessing a successive range of stimuli.These ranged through several stages of realism in artificial conspecifics,to see how features such as color,the presence of eyes,body shape and motion influence behavior.We found differences in lateralized eye use depending on the sex of the observing bearded dragon and the artificial conspecific,as well as the artificial conspecific’s behavior.Therefore,this approach can inform the design of robotic animals that elicit biologically-meaningful responses in live animals.展开更多
文章首段,很有“噱头”,让人一惊:美国911事件的幕后策划者本·拉登被捕获了?第二段才揭开谜底:The man, who had a beard, was later released(释放)。本文的幽默一笔是:a crowd had gathered outside the police station Tuesday ...文章首段,很有“噱头”,让人一惊:美国911事件的幕后策划者本·拉登被捕获了?第二段才揭开谜底:The man, who had a beard, was later released(释放)。本文的幽默一笔是:a crowd had gathered outside the police station Tuesday for a glimpse(一瞥)of the bin Laden look-alike.展开更多
第五版《电池手册》(Handbook of Batteries)由Kirby W.Beard主编,由中国电子科技集团第十八研究所的刘兴江、王松蕊等专家共同编译,中国化工出版社出版。新版《电池手册》适应电池技术发展,面向信息化、电动力和电化学储能、医疗健康...第五版《电池手册》(Handbook of Batteries)由Kirby W.Beard主编,由中国电子科技集团第十八研究所的刘兴江、王松蕊等专家共同编译,中国化工出版社出版。新版《电池手册》适应电池技术发展,面向信息化、电动力和电化学储能、医疗健康等新的应用需求,在对经典电池体系部分进行全面修订的基础上,补充了新兴电池技术、电池设计与制造、电池测试、电池安全等内容。展开更多
Notch signaling controls diverse developmental decisions of central importance to cell activity. One of the conserved positive regulators of Notch signaling is Neuralized, the E3 Ubiquitin ligase enzyme that regulates...Notch signaling controls diverse developmental decisions of central importance to cell activity. One of the conserved positive regulators of Notch signaling is Neuralized, the E3 Ubiquitin ligase enzyme that regulates signaling activity by endocytosis. Neuralized has two novel repeats, NHR1 and NHR2, with a RING finger motif at the C-terminus. Both endocytosis of the Notch ligand, Delta, and inhibition of Notch signaling by Tom, a bearded family member, require the NHR1 domain. Here we describe the first crystal structure of NHR1 domain from Drosophila melanogaster, solved to 2.1 A resolution by X-ray analysis. Using NMR and other biophysical techniques we define a minimal binding region of Tom, consisting of 12 residues, which interacts with NHR1 and show by interfacial analysis of protein monolayers that NHR1 binds PI4P. Taken together, the studies provide insight into molecular interactions that are important for Notch signaling.展开更多
Grace sat in her little room,writing a letter by the light of an oillamp.It was very late.In the upper right-hand corner of the page,shewrote her address and the date: Westfield,Chautauque Co
Men's facial skin is ubiquitously affected by their shaving behaviors. Skin physiological parameters and the degree of discomfort were investigated on healthy Chinese male volunteers. The effect of immediate shavi...Men's facial skin is ubiquitously affected by their shaving behaviors. Skin physiological parameters and the degree of discomfort were investigated on healthy Chinese male volunteers. The effect of immediate shaving and long-term shaving was compared, and more parameters such as skin integrity, pigmentation and texture were significantly influenced by long-term shaving. Sensory assessment also showed severer discomfort degree after long-term shaving. The results indicated that long-term shaving has more impact on skin condition than immediate shaving. Furthermore, the skin damage caused by shaving can be relieved by appropriate shaving care habits.展开更多
文摘Robert Penn Warren(1905-1989) is one of twentieth-century America's most distinguished men of letters.Honored with three Pulitzer Prizes,Warren is the only writer who has been a Pulitzer Prize winner in two different genres-poetry and fiction.In 1986,Warren was crowned as the first American Poet Laureate.Though he is a Renaissance man of letters in many genres,the central thrust of Warren's literary career lies in the field of poetry.Love and knowledge are the two themes which penetrate his sixty years' poetic career.Based on textual analysis,applying the method of close reading,the present study intends to explore the sound patterning,metaphor,tension and the technical devices which reinforce the theme of love and knowledge in the poem of the Bearded Oaks.
基金supported by personal fundings of Janusz Stepniewskiby the University of Wroclaw(Projects 1073/S/SORM/2017)
文摘Background: Overlapping of successive broods is a relatively rare breeding strategy that allows individuals to make effective use of the available reproductive window.Methods: In this paper we analyse the occurrence of overlapping breeding attempts in the Bearded Tit(Panurus biarmicus), a non-migratory passerine species, whose peripheral populations vary enormously in numbers.Results: The colour-ringed population of Bearded Tits was studied in western Poland in 1990, 2012–2013 and 2015–2017. Overlapping broods were found only during years with low population sizes and low densities(1.2–3.6 pairs per 10 ha), and pairs with such broods constituted 11.1–20%. In years with higher population densities(8.7–13.44 pairs per 10 ha) overlapping broods were not recorded. Pairs started building the next(overlapping) nests when their young were 3–10 days old. They divided their duties while rearing two broods simultaneously: females were occupied only with the new clutch, while males, in contrast to other species with brood overlap, not only fed the young from an earlier brood, but also helped the females with the building of a new nest and incubation of a new clutch.Conclusions: Laying overlapping clutches enabled pairs to shorten their average breeding cycle by 15–21 days and produce more offspring. It is possible that overlapping breeding attempts is a density-dependant strategy, enabling the population to restore after severe declines, however, alternative explanations are also possible. Future studies are needed to better understand mechanisms underlying the occurrence of this phenomenon.
文摘Artificial animals are increasingly used as conspecific stimuli in animal behavior research.However,researchers often have an incomplete understanding of how the species under study perceives conspecifics,and,hence,which features are needed for a stimulus to be perceived appropriately.To investigate the features that bearded dragons(Pogona vitticeps)attend to,we measured their lateralized eye use when assessing a successive range of stimuli.These ranged through several stages of realism in artificial conspecifics,to see how features such as color,the presence of eyes,body shape and motion influence behavior.We found differences in lateralized eye use depending on the sex of the observing bearded dragon and the artificial conspecific,as well as the artificial conspecific’s behavior.Therefore,this approach can inform the design of robotic animals that elicit biologically-meaningful responses in live animals.
文摘文章首段,很有“噱头”,让人一惊:美国911事件的幕后策划者本·拉登被捕获了?第二段才揭开谜底:The man, who had a beard, was later released(释放)。本文的幽默一笔是:a crowd had gathered outside the police station Tuesday for a glimpse(一瞥)of the bin Laden look-alike.
文摘第五版《电池手册》(Handbook of Batteries)由Kirby W.Beard主编,由中国电子科技集团第十八研究所的刘兴江、王松蕊等专家共同编译,中国化工出版社出版。新版《电池手册》适应电池技术发展,面向信息化、电动力和电化学储能、医疗健康等新的应用需求,在对经典电池体系部分进行全面修订的基础上,补充了新兴电池技术、电池设计与制造、电池测试、电池安全等内容。
文摘Notch signaling controls diverse developmental decisions of central importance to cell activity. One of the conserved positive regulators of Notch signaling is Neuralized, the E3 Ubiquitin ligase enzyme that regulates signaling activity by endocytosis. Neuralized has two novel repeats, NHR1 and NHR2, with a RING finger motif at the C-terminus. Both endocytosis of the Notch ligand, Delta, and inhibition of Notch signaling by Tom, a bearded family member, require the NHR1 domain. Here we describe the first crystal structure of NHR1 domain from Drosophila melanogaster, solved to 2.1 A resolution by X-ray analysis. Using NMR and other biophysical techniques we define a minimal binding region of Tom, consisting of 12 residues, which interacts with NHR1 and show by interfacial analysis of protein monolayers that NHR1 binds PI4P. Taken together, the studies provide insight into molecular interactions that are important for Notch signaling.
文摘Grace sat in her little room,writing a letter by the light of an oillamp.It was very late.In the upper right-hand corner of the page,shewrote her address and the date: Westfield,Chautauque Co
文摘Men's facial skin is ubiquitously affected by their shaving behaviors. Skin physiological parameters and the degree of discomfort were investigated on healthy Chinese male volunteers. The effect of immediate shaving and long-term shaving was compared, and more parameters such as skin integrity, pigmentation and texture were significantly influenced by long-term shaving. Sensory assessment also showed severer discomfort degree after long-term shaving. The results indicated that long-term shaving has more impact on skin condition than immediate shaving. Furthermore, the skin damage caused by shaving can be relieved by appropriate shaving care habits.
