Cerebral white matter--historical evolution of facts and notions concerning the organization of the fiber pathways of the brain

Gross and microscopic studies by early investigators led the cerebral white matter from being regarded as an amorphous mass to an intricately organized system of fasciculi that facilitate the highest expression of cerebral activity. Here we pay homage to the anatomists whose observations resulted in the evolution of ideas about the cerebral white matter. We also draw attention to limitations of the earlier methodologies and to some of the conflicts and controversies that have characterized this field and that persist in the current literature. We conclude with brief reference to the principles of organization of the fiber pathways derived from our studies in the monkey using the autoradiographic tract tracing technique, another step in the ongoing investigations of the cerebral white matter. This historical review has contemporary relevance because the fiber pathways of the brain are crucial components of the distributed neural circuits that subserve nervous system function; the clinical manifestations of white matter damage are recognized with greater frequency and clarity; and magnetic resonance imaging tractography has made it possible to view these fiber bundles within the living human brain.     

Cerebral White Matter — Historical Evolution of Facts and Notions Concerning the Organization of the Fiber Pathways of the Brain

Gross and microscopic studies by early investigators led the cerebral white matter from being regarded as an amorphous mass to an intricately organized system of fasciculi that facilitate the highest expression of cerebral activity. Here we pay homage to the anatomists whose observations resulted in the evolution of ideas about the cerebral white matter. We also draw attention to limitations of the earlier methodologies and to some of the conflicts and controversies that have characterized this field and that persist in the current literature. We conclude with brief reference to the principles of organization of the fiber pathways derived from our studies in the monkey using the autoradiographic tract tracing technique, another step in the ongoing investigations of the cerebral white matter. This historical review has contemporary relevance because the fiber pathways of the brain are crucial components of the distributed neural circuits that subserve nervous system function; the clinical manifestations of white matter damage are recognized with greater frequency and clarity; and magnetic resonance imaging tractography has made it possible to view these fiber bundles within the living human brain.     

Is it really bridging the gap? Fiber internet's impact on housing values and homebuyer demographics

Fiber internet expansion represents a path to improved economic vitality for Americans, but it is unclear who benefits from it and by how much. We examine the effects of subsidized fiber internet expansion on home prices and homebuyer demographics using data from Wisconsin and an IV approach to correct for fiber network endogeneity. We find fiber internet increases urban and rural housing values by 1.83% ($3,462) and decreases the likelihood a homebuyer is white by 2.88%, but in urban areas only. Fiber internet therefore does not appear to drive minority homebuyers away but may contribute to the urban-rural racial divide.     

古建油饰彩画的制作技术分析研究

为了对中国特有的古建油饰彩画制作技术加深了解,促进古建油饰彩画传统工艺科学化,采用X射线衍射仪、X射线荧光光谱仪、扫描电镜、体视显微镜等仪器对采自蒙古博格达汗宫博物馆、北京颐和园、甘肃嘉峪关、山西太符观等古代建筑的油饰彩画样品的制作技术进行了分析研究。结果表明,测试的样品分别采用了一麻五灰、一布四灰、单披灰等多种工艺制作地仗;麻纤维广泛应用于样品纤维层中,仅样品YHY-22使用了棉布;颐和园和博格达汉宫博物馆的样品以砖灰作为地仗无机填料,嘉峪关样品使用了白土粉,而山西古建样品则可能使用当地的土壤。可以得出结论:几个地区古建油饰彩画的制作材料和技术是有所不同的。     

REPRODUCING AND RESHAPING ETHNIC RESIDENTIAL SEGREGATION IN STOCKHOLM: THE ROLE OF SELECTIVE MIGRATION MOVES

This paper deals with the issues of selective migration moves, and the production and reproduction of immigrantdense neighbourhoods in Stockholm, Sweden. It has been shown earlier that selective migration, that is, socioeconomic and ethnic differences between those leaving, entering and staying in so‐called deprived neighbourhoods, reproduces these neighbourhoods' characteristics of being poor and immigrant dense. Key concepts launched to inform such studies and derived from the US segregation discourse are “white fight” and “white avoidance”, meaning that native people (or white people in the US case) tend to leave neighbourhoods experiencing growing numbers of immigrants (black people) and which they also tend to avoid moving into such neighbourhoods. Using a complete set of geo‐coded longitudinal individual data for the 2005–2008 Stockholm County population, this paper contributes to our understanding of ethnic differences in the intra‐urban migration system. Three empirical questions are addressed: what individual characteristics distinguish (1) those who move into neighbourhoods experiencing rapidly increasing immigrant densities from those moving elsewhere in the urban region; (2) those who leave neighbourhoods experiencing rapidly increasing immigrant densities from those who stay put; (3) those who move in the direction of higher immigrant densities from those moving into lower densities? Results from multivariate statistical analyses provide support for the avoidance hypothesis but less support for the fight hypothesis. When controlling for a range of individual and neighbourhood attributes there is clear evidence that native‐born Swedes are less inclined than most immigrant categories to move into immigrant dense areas while ethnic origin does not seem to matter much when explaining who leaves such areas.     

试析1860～1861年美国南部蓄奴州脱离联邦运动的社会基础

南部蓄奴州脱离联邦运动是美国内战前夕的重要历史事件。在南部蓄奴州脱离联邦的过程中,白人奴隶主是决定性的社会力量。非奴隶主白人在脱离联邦问题上则表现出地区性差异：在奴隶制不发达地区,非奴隶主白人的多数反对脱离联邦;在奴隶制发达地区,非奴隶主白人的多数则接受了脱离联邦的选择。造成这种地区性差异的原因,在于非奴隶主白人民众并不作为一个自为的阶级而行动,因此,在奴隶制发达地区,他们在政治上只能顺从奴隶主的领导,而在奴隶制不发达地区,他们就可以完全根据自己的意愿行事。     

The 1932 and 1944 Nobel Prizes in physiology or medicine: rewards for ground-breaking studies in neurophysiology

In 1932 Sherrington and Adrian were awarded the Nobel Prize in Physiology or Medicine "for their discoveries regarding the functions of neurons" and in 1944 Erlanger and Gasser were awarded the same prize "for their discoveries relating to the highly differentiated functions of single nerve fibres." Sherrington made important discoveries on the reflex functions of the spinal cord, formulated the concept of the "synapse," defined the principle of the "final common path," studied "reciprocal innervation" and showed that central inhibition was an active phenomenon. He distinguished three types of receptors: extero-, intero-, and proprioceptive, studied the proprioceptive reflexes in the decerebrate animal and mapped their pathways in the spinal cord. Adrian made fundamental discoveries on the function of single nerve fibers, developed new techniques for the amplification of the weak signals and discovered that increased stimulation resulted in increased frequency of the impulses, the amplitude being unaffected. Erlanger and Gasser introduced the cathode-ray oscillograph and demonstrated the existence of three main groups of nerve fibers, A, B, and C, the conduction velocities of which were in approximately linear relationship with the fiber diameter, the A-fibers being the fastest and thickest and the C-fibers the slowest and having the finest diameter. Together the contributions by the four Laureates paved the way to modern neurophysiology.     

西周至南北自制玻璃概述

我国玻璃起步较晚,大体始于西周初或先周(殷末),主要是蓝色、浅蓝色或绿色玻璃珠管,与玉、玛瑙配合制成“杂佩”。其时玻璃的主要成分为二氧化硅,并含有少量铅、钡,故称为铅钡玻璃,与西方钠钙玻璃不同而独树一帜。春秋战国时期,西方蜻蜓眼玻璃珠输入我国,从此,以仿羊脂白玉美若明月的“隋侯珠”为代表的自制玻璃与外来玻璃并存。西方(大月氏)吹制玻璃术于汉魏传入我国之后,也出现了自制的空心玻璃器皿。     

Imperial modernity,national identity and capital punishment in the Samarcand Arson Case, 1931

ABSTRACT. This article draws upon the fascinating and little known 1931 Samarcand Arson Case involving the possible execution of adolescent white female inmates at a juvenile reformatory in North Carolina. Marked by nationalist discourses, the spectacle generated by this case indicates much about how white New South advocates construed national life and sought to construct a white ‘civilised’ collective identity, defending their region from Northern charges of Southern barbarism and asserting their place within the imperial politics of American nation building. The decision not to execute any of the sixteen defendants was informed by a series of interconnected ideas about sexuality, national danger, ‘civilisation’ and ‘race,’ suggesting that the presumed ‘legal chivalry’ extended to the young defendants was not a simple matter of gender bias, but involved a nuanced set of reasons related to negotiations of national belonging through racialised alliances.     

New evidence for jute (<Emphasis Type="Italic">Corchorus capsularis</Emphasis> L.) in the Indus civilization

In this paper, we report the results of an analysis of a preserved structure of jute on a ceramic artifact from the site of Harappa that is dated to 2200–1900 (cal.) BC (Fig. 1). Jute cloth has not previously been identified at this early date in the Indus civilization. Since fiber remains are rare in prehistoric South Asia, we briefly review the evidence for seed and fiber remains used in textile production in this region.     

《孔圣宗师出身全传》考论

《孔圣宗师出身全传》是中国古代唯一以孔子为中心人物的章回体长篇小说,它比较严格地遵照史载．将一人言行编成若干故事,演为传记小说,此为首创,在中国古代小说史上亦属罕见。用通俗小说体例来展现圣人生平与思想,在孔子形象与儒学传播史上意义非凡。但《孔圣宗师出身全传》版本稀少,在相当长的时期内罕为人知,鲜有人论及。本文就该书的体例结构、题材本事与“全相”模式的来源,及其对孔子形象的传播影响略作考论,认为《孔圣宗师出身全传》“年谱式”体例借鉴了《阙里志．年谱》,题材主要出自《孔子家语》,“全相”模式深受《孔子圣迹图》的影响。《全传》使孔子形象与思想更利于被普通百姓理解、接受,具有独特的传播优势。     

"Hats off, gentlemen, to our Australian mothers!" Representations of white femininity in North Queensland in the early twentieth century

This paper examines some representations of the anxiety and uncertainty about "white woman's place" in tropical North Queensland that were present in medical and general discourse in the early twentieth century. It focuses on white women's work in the private sphere as both the source of and the solution to these anxieties. Although 'White Australia' had been legislatively established in the "public sphere" by the 1920s, through the passage of the Queensland Aboriginal Protection Act of 1897, and the Commonwealth Immigration Restriction Act of 1901, in the tropics there was still public concern about how it would be established in the "private sphere". This was because even though the conventional wisdom that a white man could not work in the tropics and remain healthy had been successfully challenged by the early twentieth century, the same could not be said about such wisdom as it applied to white women and children. This paper looks at some of the ways that ideologies of race and gender intersected in the early twentieth century to construct white women and children as a group that could bring down the successful establishment of "White Australia", and this group was specially targeted for surveillance by the "new experts" of medicine, sociology and domestic science.     

Scientific study of the pigments and binders used in mural painting from the 16th-century ce St Mary's Church of Cheriapally,Kottyam, Kerala,and its relevance to conservation

The aim of this investigation was to analyze the materials and techniques of the paintings in the 16th-century ce St Mary's Church, to evaluate deterioration of the paintings, and to propose a suitable conservation treatment for their preservation. The material analysis of ground, pigments, binders, and plasters was undertaken using binocular microscopy, field emission scanning electron microscopy (SEM)–energy dispersive X-ray spectroscopy, X-ray fluorescence, Fourier transform infrared spectroscopy in reflectance (KBr) and transmittance mode (attenuated total reflection), thin-film X-ray diffraction, and micro-Raman spectroscopy. Gas chromatography–mass spectrometry (GC-MS) was used for identifying proteinaceous and lipidic materials extracted from the micro-samples. The study generated data on two different red and green pigments used as decorative materials. The red pigments were identified as cinnabar along with traces of hematite and clay minerals, and green as malachite and the minor presence of other minerals. SEM analysis identified cotton fiber embedded in the coarse plaster layer that provided better strength to the plaster. Plant oils and proteins found as the binder in the pigment samples suggested that the painting technique was executed as tempera. Lead white and gypsum materials were used in previous restoration works.     

PALAEOLITHIC LITHOPHONES: DESCRIPTIONS AND COMPARISONS

Following the findings of the lithophone at the "Organ" sanctuary in the cave of Nerja (Dams 1984a), This paper describes and discusses other similar natural configurations. Like the "Organ", some of the lithophones mentioned below are also decorated. The function of these natural percussion sets may be linked with other Palaeolithic instruments like the flutes, of which 30 have been found to date. There is no resemblance in the subject matter of the ornamented lithophones, and the signs and symbols selected for their decoration are dissimilar; it may be assumed that this subject matter was not directly connected with the sound effect itself, but rather with the different surroundings of each cave and with a different story to be related to the spectators or participants in a rite or ceremony.     

Composition of white paste inlay on the pottery from sites of the 10th–8th centuries bce in the northern Pontic region

For the first time, the mineralogical–geochemical compositions of the white paste inlay found on vessels from sites (10th–8th centuries bce ) in the northern Pontic region are investigated. Samples of the white paste on vessels from settlements, burials of sedentary groups and graves of early nomads were analysed by means of scanning electron microscopy with energy-dispersive X-ray spectrometry (SEM-EDX) and X-ray diffraction (XRD) methods. Between the 10th and eighth centuries bce , various innovations occurred in the working area. Iron processing technology and the manufacture of iron products also appeared. Other innovations were changes in the manufacturing technology of ceramics. A high-quality, polished/burnished surface and ornaments with white paste inlay are characteristic of this pottery. When collating white paste mixtures of different European sites, similarities in the preparation of white paste recipes for vessels from the Balkan and northern Pontic regions are evident. During the Early Iron Age, further changes in the manufacture of the white paste were discovered in the northern Pontic region, namely the application of high-temperature firing to obtain more resistant synthesized material such as calcium alumosilicates and silicates (wollastonite). The development of iron metallurgy in this period could provide a basis for the elaboration of new techniques in ceramic manufacture.     

Cultural Heritage Documentation and Conservation: Three-Dimensional (3D) Laser Scanning and Geographical Information System (GIS) Techniques for Thematic Mapping of Facade Stonework of St. Nicholas Church (Pisa,Italy)

This article reports the mapping of the stones, including marbles and brick masonry, used for building the facade of the medieval Church of St. Nicholas (XI century ad), one of the most interesting churches in Pisa, due also to the nearby famous octagonal bell tower. Mapping of stone materials was performed using a computer-aided design (CAD)/geographical information system (GIS) software package for storing and processing spatial information of the ashlars, obtained using three-dimensional (3D) laser-scanning data, combined with high-resolution images, and stone-to-stone observations. Based on collected data, the facade of the Church of St. Nicholas appeared mostly composed of rocks belonging to the metamorphic Tuscan sequence, quartzites, and marbles from Mt. Pisano area. Other types of rocks were also observed, as black limestones quarried at some kilometers northwest from Pisa in the Monti d’Oltre Serchio area, white Apuan marbles and Macigno sandstones. Conversely, intarsia appeared mainly made up of serpentinite and, subordinately, red limestones laid in white Apuan and Mt. Pisano marbles.     

First evidence of white wine in ancient Egypt from Tutankhamun's tomb

Wine has been considered to be mainly red in ancient Egypt linked with the blood of Osiris, the God of resurrection. No text that refers to white wines from the Dynastic Period (3150–332 BC) exists. The first white wine from ancient Egypt was made near Alexandria during the third century AD. To investigate the presence of white wine in ancient Egypt, dry residue samples from King Tutankhamun's amphorae are studied in this article using the LC/MS/MS method for wine markers. This investigation into the existence of white wines in Tutankhamun's tomb allows us to shed new light on the symbolism of white wine in ancient Egypt.     

西藏拉萨大昭寺转经廊壁画制作工艺研究

古代壁画是一定时期政治、经济、文化、艺术和科技发展水平的物质反映,因此,利用现代科技分析手段提取其信息并将之与古代文献结合,则可逆推其制作工艺和判定其制作时间,进而确定其历史价值、科学价值和艺术价值,为艺术史研究和保护修复提供信息。本工作利用拉曼光谱(Raman)、偏光显微镜(PLM)、扫描电子显微镜与能谱仪(SEM-EDS)、红外光谱(FT-IR)和X射线衍射(XRD)在西藏大昭寺转经廊壁画样品分析中获取的信息,结合文献,确定西藏拉萨大昭寺转经廊壁画绘制于清代晚期至20世纪80年代之间。此幅壁画地仗使用了阿嘎土,与文献记载一致;白粉层使用立德粉、碳酸镁和方解石等,与文献记载用白胶浆或者黄胶浆相异。同时发现壁画颜料采用藏族传统绘画配色方法。