复杂网络视角下的亚历山大整体性

本文以克里斯托弗·亚历山大设想和发展的整体理论为基础,从复杂网络的角度来理解整体理论,以更好地理解秩序和美的本质;综合关于复杂性科学的学科,使亚历山大的理论更容易被设计师和复杂性科学研究者理解;同时也为亚历山大关于精细或深层结构中存在的整体性或客观美感的思想带来了新的见解。整体性或整体性理论超越了当前复杂的网络理论,为设计和创造有生命的空间结构提供了平台。

Glacier mass balance in High Mountain Asia inferred from a GRACE release-6 gravity solution for the period 2002–2016

We provide estimates of glacier mass changes in the High Mountain Asia (HMA) area from April2002 to August 2016 by employing a new version of gravity solutions of the Gravity Recovery and ClimateExperiment (GRACE) twin-satellite mission. We find a total mass loss trend of the HMA glaciers at a rateof –22.17 (±1.96) Gt/a. The largest mass loss rates of –7.02 (±0.94) and –6.73 (±0.78) Gt/a are found forthe glaciers in Nyainqentanglha Mountains and Eastern Himalayas, respectively. Although most glaciers inthe HMA area show a mass loss, we find a small glacier mass gain of 1.19 (±0.55) and 0.77 (±0.37) Gt/a inKarakoram Mountains and Western Kunlun Mountains, respectively. There is also a nearly zero massbalance in Pamirs. Our estimates of glacier mass change trends confirm previous results from the analysisof altimetry data of the ICESat (ICE, Cloud and Land Elevation Satellite) and ASTER (AdvancedSpaceborne Thermal Emission and Reflection Radiometer) DEM (Digital Elevation Model) satellites inmost of the selected glacier areas. However, they largely differ to previous GRACE-based studies which weattribute to our different post-processing techniques of the newer GRACE data. In addition, we explicitlyshow regional mass change features for both the interannual glacier mass changes and the 14-a averagedseasonal glacier mass changes. These changes can be explained in parts by total net precipitation (netsnowfall and net rainfall) and net snowfall, but mostly by total net radiation energy when compared to datafrom the ERA5-Land meteorological reanalysis. Moreover, nearly all the non-trend interannual masschanges and most seasonal mass changes can be explained by the total net radiation energy data. The massloss trends could be partly related to a heat effect due to increased net rainfall in Tianshan Mountains, QilianMountains, Nyainqentanglha Mountains and Eastern Himalayas. Our new results for the glacier mass changein this study could help improve the understanding of glacier variation in the HMA area and contribute tothe study of global change. They could also serve the utilization of water resources there and in neighboringareas.

The Influence of Place on Everyday Life: Observations of Persons with Dementia in Regular Day Care and at the Green Care Farm

Day care services for persons with dementia are becoming an important aspect of community services. Place, therefore, becomes vital concerning how such establishments are organized regarding both the physical and social environment and the programs that are offered. The aim of this study was to describe the influence of place on everyday life in two different organized daycare services for persons with dementia. Based on observations and informal conversations with persons with dementia and staff members at a green care farm and a regular day care, we used an inductive manifest content analysis. The analysis reveals a main category: enabling and collaboration in daily life. The results are discussed in light of Goffman’s analysis of the structures of social encounters from the perspective of the dramatic performance. The main findings in this study involve how place contributes to enabling activities and collaboration between participants and staff, as it influences participants’ ability to achieve an active or passive role in everyday life at the day care services.

Effects of Inflow Conditions on Wind Turbine Performance and near Wake Structure

Knowledge about the structure and development of wakes behind wind turbines is important for power optimization of wind power farms. The high turbulence levels in the wakes give rise to undesired unsteady loadings on the downstream turbines, which in the long run might cause fatigue damages. In the present study, the near wake behind a small-scale model wind turbine was investigated experimentally in a wind tunnel. The study consists of measurements with particle image velocimetry using two different inlet conditions: a freely developing boundary layer, causing an almost uniform inflow across the rotor disc, and an inflow with strong shear across the rotor disc, in order to model the atmospheric boundary layer. The results show a faster recovery of the wake in the case with shear inflow, caused by the higher turbulence levels and enhanced mixing of momentum. The increased inlet turbulence levels in this case also resulted in a faster breakdown of the tip vortices as well as different distributions of the streamwise and vertical components of the turbulence intensity in the wake. An analysis comparing vortex statistics for the two cases also showed the presence of strong tip vortices in the case with lower inlet turbulence, while the case with higher inlet turbulence developed a different distribution of vortices in the wake.

高亚洲及其邻区2003~2017年质量平衡的气候影响分析

利用重力恢复和气候实验(GRACE)数据获得高亚洲及其邻近地区的质量变化,可分析区域气候因素如印度季风、西风带和厄尔尼诺-南方涛动(ENSO)对结果的影响。然而,最近的研究发现,西风带的贡献小于厄尔尼诺,与传统研究结论不同。因此,利用2003-01~2017-06期间GRACE RL06的Mascon数据进行复经验正交函数(CEOF)分析。研究发现,前3个主要成分对研究区质量变化的贡献率分别为53%、27%和6%,与印度季风、西风带和ENSO指数的相关系数分别是0.92±0.16、0.70±0.15和0.42±0.15,说明在长达14 a的观测时间跨度内,印度季风、西风带和ENSO对研究区质量变化的贡献分别为53%、27%和6%,西风带是研究区质量变化的第2个影响因素,这支持了传统的研究结论;ENSO通过印度季风对某些区域(如帕米尔高原、喜马拉雅山脉和印度西北部)的质量变化产生影响;在印度西北部、喜马拉雅山脉和藏东南地区,由于印度季风的减弱及其相关的ENSO作用和西风带的加强,质量变化呈现下降趋势;在兴都库什、西昆仑和东昆仑地区,由于西风带的增强,质量变化呈上升的趋势;在帕米尔和天山地区,虽然受到较强西风带的影响,但由于同时受到印度季风和ENSO减弱以及气温上升趋势的影响,质量变化呈下降的趋势。

Automatic Computer Analysis of Digital Images of Triple-Antibody-Stained Prostate Biopsies

Background: Worldwide, prostatic adenocarcinoma is the most common tumour type among men. Aim: The aim of the present investigation was to develop a computer program to identify normal prostate biopsies and distinguish them from biopsies showing premalignant alterations (LGPIN, HGPIN) and adenocarcinoma. Method: Prostate biopsies (n = 2094) taken from 191 consecutive men during 2016 were stained with triple immunehistochemisty (antibodies to AMACRA, p63 and CK 5). Digital images of the biopsies were obtained with a scanning microscope and used to develop an automatic computer program (CelldaTM), intended to identify the morphological alterations. Visual microscopic finding was used as a reference. Result: Of the 191 men, 121 (63.4%) were diagnosed as having prostate adenocarcinoma and 70 (36.6%) as having no malignancy on the basis of the visual microscopy. In comparison, computer analysis identified 134 (70.2%) men with malignant disease and 57 (29.8%) with non-malignant disease after exclusion of artifacts, which constituted 10.4% of areas (indicated as malignant disease). Discrepant results were recorded in 15 (7.9%) men, and in 14 of these cases, HGPIN and areas suggestive of early invasion were common. Thus, it was uncertain whether these cases should be regarded as malignant or not. The agreement between the visual examination and the computer analysis was 92.1% (kappa value 0.823, sensitivity 99.2 and specificity was 0.80). Conclusion: It seems that computer analysis could serve as an adjunct to simplify and shorten the diagnostic procedure, first of all by ensuring that normal prostate biopsies are sorted out from those sent for visual microscopic evaluation.

On the Wake Flow Interaction between Model Turbines with Varying Streamwise Distance

Wind tunnel measurements using particle image velocimetry have been performed around two perforated discs, with varying streamwise distance, in order to simulate the wake interaction between wind turbines. The static pressure footprint (p-f) on ground level associated with the wake behind the disc and wake velocity data for both the streamwise and wall-normal velocity components with the corresponding turbulence intensities are reported. The p-f method shows that the size of the wake regions, behind the wind turbine models, initially drop when a second disc is placed just downstream of the first one. From a mutual distance (Δ χ) of about five disc diameters (5D), both wake footprints increase as the mutual distance is increased, and for very large mutual distances, approximately Δ χ/ D > 15, the footprint of the downstream disc has recovered and is about the same as for a single disc. At last we conclude that despite very different inlet conditions to the discs, with about 50% of reduced velocity on the centre line upstream of the second disc and an increase of the maximum streamwise fluctuations by 90%, the mean velocities in the wake are proven to scale with the hub height velocity.

Wanting a Life in Decency!—A Qualitative Study from Experienced Electric Wheelchairs Users’ perspective

Background: The functionality and the safety of the electric wheelchairs were essential for users’ everyday life. Some evidence indicated that the wheelchair Per Se highly influenced users’ occupational life, their personal identity and social life;further, the wheelchair became an extension of the body and more than a technical device. Besides, there was still both environmental and self-efficacy or/and mental health factors obstacles for full social participation. Even so, there was to some extent stigma related to being a wheelchair user. There was a need to reflect users’ perspective on being depended on electric wheelchair. The aim, accordingly, was to describe and to get a deeper insight into electric wheelchairs users’ perspective and experiences of utilizing this device;a qualitative design with an inductive approach was used. Method: Qualitative latent and interpretative content analysis [1] [2] was used after repeated face-to-face semi-structured interviews with three experienced Swedish electric wheelchair users during the autumn 2017. Findings: The findings showed a high degree of dependability of the assistants that supported the users, and of the quality of that working relationship. The findings were formulated, abstracted and interpreted in several steps. It showed one theme of meaning: “Living in a space shifting between potential violation of or respect for human dignity”. Conclusion: The study showed that electric wheelchair users were relatively content with their lives as well as with their devices in turns of mobility and accessibility, but the meaning of their narrations showed a life at constant risk of having the respect of human rights and human respect violated. Besides, the importance of having access to good and high quality devices, good staffing, and environmental support, all in concordance with human rights, the clinical and practical implications of this study narrows down to a question of encountering the other person as a whole and worthy individual.

温轧——线棒材轧机上的一种节能方法

在线材或棒材轧机上,能量消耗约占生产成本的55％,而其中的约80％即总生产成本的45％是燃料油的费用。降低轧制温度,可以减少燃料油的费用,但电能费用却增加了。然而,当轧制温度降低时,轧机的总能量消费降低。总能量费用的降低也与能源价格有关。在轧制过程中,温轧的热量损失明显低于热轧。当然,温轧中的轧机载荷较高,但却相应地减少了轧制中的热量损失,并且增加了粗轧机的变形功。与热轧相同,在轧制过程中获得了热量而不是损失热量,总轧制功增加不多。温轧极限的部分原因是由于轧制材料的韧性,但主要是由于粗轧机载荷。在许多情况下,不得不对粗轧机进行现代化改造,以引入温轧。如果有足够高的年产量,可在二年或三年内收回投资,这是由于较低的能量费用,较高的产量,同时也是由于当加热温度较低时,加热过程中的氧化皮形成量减少。从增加钢坯尺寸来提高生产率的观点看,通过引入温轧可以减少那些必要的投资,这是由于不必重建加热炉。在此情形下,Metalmill紧凑式万能粗轧机是最有益的解决方法。温轧的获益性在很大程度上取决于能源价格,而且在有大量的水力发电的国家,应用温轧的可能性最大。

Health-Related Internet Information Both Strengthens and Weakens Parents’ Potential for Self-Care—A Mixed-Methods Study on Parents’ Search Patterns

Background: Today’s parents belong to the digital generation and regularly use the Internet as a source of information. Parents’ quests for health-related online information comprise an effort to manage symptoms of illness or address questions about child development which may be an expression of self-management or self-care. Purpose: This study aims to describe health and child development related Internet search patterns used by parents of children ages zero to six, and further, how the obtained information was used in contacts with Child Health Care. Design and Methods: A two-step mixed- method approach is used in this study, comprising both a quantitative and a qualitative approach. First, a questionnaire was distributed to parents (n = 800) at 13 health centers in a medium sized county in Sweden. Second, one narrative interview with two parents total was conducted. Descriptive and non-parametric statistics were calculated, and qualitative manifest content analyses were performed. Results: A total of 687 completed the questionnaire, which corresponds to a response rate of 86%. The results show that 97% used the Internet for health-related and developmental child issues. The results show that parents often look at basic tips and the Internet is seen as a fast and accessible forum to obtain information. Parents often initiated their Internet searches using Google search for the specific subject, but the most common and most used website (used by 95% of parents), was the Swedish health site 1177.se. 98.4% of parents evaluated the general information searches they made on the Internet as reliable despite only 31% of the parents checking to see if the websites they used were scientifically based. Parents (81.7%) stated that they wanted their Child Health Nurses (CHN) to give them recommendations for valid websites. Conclusions: The results in this study show that, on the one hand, the Internet could strengthen parental knowledge (support self-care capacity), but, on the other hand, the found information could worry them and increase their anxiety—negatively affected self-care capacity. The parents suggested that the information should be double-checked to establish trust and develop self-care knowledge. Having a good resource to rely on, such as personal contact with a CHN, or using reliable websites seems to strengthen and reassure parents.

A Modified Mixing Rule for PSRK Model and Application for the Prediction of Vapor-Liquid Equilibria of Polymer Solutions

To extend the PSRK (predictive Soave-Redlich-Kwong equation of state) model to vapor-liquid equilibria of polymer solutions, a new EOS-gE mixing rule is applied in which the term ∑xiln(b/bi) in the PSRK mixing rule for the parameter a, and the combinatorial part in the original universal functional activity coefficient (UNIFAC) model are cancelled. To take into account the free volume contribution to the excess Gibbs energy in polymer solution, a quadratic mixing rule for the cross co-volume bij with an exponent equals to 1/2 is applied [bij^1/2=1/2(bi1/2+bj1/2)]. The literature reported Soave-Redlich-Kwong equation of state (SRK EOS) parameters of i3 - 2- pure polymer are employed. The PSRK model with the modified mixing rule is used to predict the vapor-liquid equilibrium (VLE) of 37 solvent-polymer systems over a large range of temperature and pressure with satisfactory results.

Shareholding Networks for Care in Rural Thailand: Experiences of Older Persons and Their Family Members

Most members of the older population in Thailand live in rural areas while their children live in cities. With the joint family system separated, elderly Thai persons often have to care for themselves, and opportunities for them to get involved in community care remain limited. In response, the aim of this study was to describe older persons’ and their family members’ experiences with shareholding networks for the care of older people in rural Thailand. Paired interviews with five older persons and five of their family members were conducted, and collected data were subjected to content analysis, which yielded results organized around two themes: older persons’ outsider status and disregard for older persons’ individuality. Whereas the theme of outsider status describes shortcomings in healthcare encounters, the theme of disregard for individuality describes the lack of engagement of authorities and caregivers in older persons’ care. In that sense, the concept of participation emerged as a framework for understanding interviewees’ experiences. Given findings from local authorities, older individuals and their family members should engage in dialogue in order to support healthcare based on shared understanding.

Pesticide Residue Control in the Years 1988-1989 in Italy

The paper reports the monitoring for pesticide residue contamination of foodstuffs carried out in the years 1988-1989 by the Italian peripheral laboratories officially commissioned for the task. The tables show the analytical data for each class of substrate versus the limits in force at the time. 2506 food samples and 555 samples from the environment were analysed and a total of 16259 determinations made.The residues were absent in 90% of the cases; the percentage of irregularities was 1.52%. These results confirm the data obtained in previous years, which is particularly significant considering the much larger number of analytical determinations performed this time.It has been deemed convenient to survey specific types of foodstuffs (for example, cereals and animal products) by examining a larger number of samples.

Theoretical Deficiencies of Isostatic Schemes in Modeling the Crustal Thickness along the Convergent Continental Tectonic Plate Boundaries

The results of global and regional studies often show significant disagreement between the Moho depths determined using seismic and isostatic models. In this study, we estimate the differences between these two models in central Eurasia. The Vening Meinesz-Moritz （VMM） inverse problem of isostasy is utilized to determine the isostatic Moho depths. The estimated VMM Moho depths are then corrected for the sediment density contrast. The application of this correction improves the agreement between the isostatic and seismic Moho models. The existing discrepancies between the isostatic and seismic models are finally modeled by applying the non-isostatic correction, which accounts for the unmodelled mantle density heterogeneities and other geodynamic processes, which are not taken into account in classical isostatic models. Our results reveal that the non-isostatic correction still cannot fully describe mechanisms affecting the Moho geometry along the convergent continent-tocontinent tectonic plate boundaries occurring beneath Himalayas despite an overall good performance of the applied method.

Combined Moho Parameters Determination Using CRUST1.0 and Vening Meinesz-Moritz Model

According to Vening Meinesz-Moritz （VMM） global inverse isostatic problem, either the Moho density contrast （crust-mantle density contrast） or the Moho geometry can be estimated by solv- ing a non-linear Fredholm integral equation of the first kind. Here solutions to the two Moho parame- ters are presented by combining the global geopotential model （GOCO-03S）, topography （DTM2006） and a seismic crust model, the latter being the recent digital global crustal model （CRUST1.0） with a resolution of 1°×1°. The numerical results show that the estimated Moho density contrast varies from 21 to 637 kg/m3, with a global average of 321 kg/m^3, and the estimated Moho depth varies from 6 to 86 km with a global average of 24 km. Comparing the Moho density contrasts estimated using our least-squares method and those derived by the CRUST1.0, CRUST2.0, and PREM models shows that our estimate agrees fairly well with CRUST1.0 model and rather poor with other models. The estimated Moho depths by our least-squares method and the CRUST1.0 model agree to 4.8 km in RMS and with the GEMMA1.0 based model to 6.3 km.

Effects of different forms of nitrogen addition on microbial extracellular enzyme activity in temperate grassland soil

Background:Nitrogen(N)deposition alters litter decomposition and soil carbon(C)sequestration by influencing the microbial community and its enzyme activity.Natural atmospheric N deposition comprises of inorganic N(IN)and organic N(ON)compounds.However,most studies have focused on IN and its effect on soil C cycling,whereas the effect of ON on microbial enzyme activity is poorly understood.Here we studied the effects of different forms of externally supplied N on soil enzyme activities related to decomposition in a temperate steppe.Ammonium nitrate was chosen as IN source,whereas urea and glycine were chosen as ON sources.Different ratios of IN to ON(Control,10:0,7:3,5:5,3:7,and 0:10)were mixed with equal total amounts of N and then used to fertilize the grassland soils for 6 years.Results:Our results show that IN deposition inhibited lignin-degrading enzyme activity,such as phenol oxidase(POX)and peroxidase(PER),which may restrain decomposition and thus induce accumulation of recalcitrant organic C in grassland soils.By contrast,deposition of ON and mixed ON and IN enhanced most of the C-degrading enzyme activities,which may promote the organic matter decomposition in grassland soils.In addition,theβ-N-acetyl-glucosaminidase(NAG)activity was remarkably stimulated by fertilization with both IN and ON,maybe because of the elevated N availability and the lack of N limitation after long-term N fertilization at the grassland site.Meanwhile,differences in soil pH,soil dissolved organic carbon(DOC),and microbial biomass partially explained the differential effects on soil enzyme activity under different forms of N treatments.Conclusions:Our results emphasize the importance of organic N deposition in controlling soil processes,which are regulated by microbial enzyme activities,and may consequently change the ecological effect of N deposition.Thus,more ON deposition may promote the decomposition of soil organic matter thus converting C sequestration in grassland soils into a C source.

A power-law-based approach to mapping COVID-19 cases in the United States

This paper examines the spatial and temporal distribution of all COVID-19 cases from January to June 2020 against the underlying distribution of population in the United States.It is found that,as time passes,COVID-19 cases become a power law with cutoff,resembling the underlying spatial distribution of populations.The power law implies that many states and counties have a low number of cases,while only a few highly populated states and counties have a high number of cases.To further differentiate patterns between the underlying populations and COVID-19 cases,we derived their inherent hierarchy or spatial heterogeneity characterized by the ht-index.We found that the ht-index of COVID-19 cases persistently approaches that of the populations;that is,5 and 7 at the state and county levels,respectively.Mapping the ht-index of COVID-19 cases against that of populations shows that the pandemic is largely shaped by the underlying population with the R-square value between infection and population up to 0.82.

STECKEL轧机轧制规程的计算机控制系统

引言 由于市场需求的变化,法格斯塔(Fagersta)不锈钢公司认识到有必要在斯特克尔热轧机建一个现代化设定系统,使不锈钢带实现更好厚度公差,更好板形要求,同时又是小批量的要求。因此决定以新的计算机控制的轧制规程计算和设定系统来取代传统手动的轧机设定表。

STECKEL轧机采用辊缝润滑生产不锈钢带

前言 在热轧过程中采用润滑的目的是减少轧辊和带材间的摩擦,从而降低了轧制力、力矩、功率和能耗。带钢的表面质量与尺寸精度都获得改进。同时,轧辊磨损减少,增加了轧辊寿命,减少了车间换辊停机时间。 在瑞典的一台Steckel轧机上轧制不锈钢,发生了轧机传动电机与整流机组超载问题。为了解决超载问题,决定尝试采用辊缝润滑的方法。

Postural instability after lumbar spinal surgery:are there any predictive factors? A case control study

Background:The surgical spinal degenerative pathology mainly concerns the herniated intervertebral disks.Surgery is indicated when the pain becomes chronic and intense,and when motor signs appear.The results are positive in about 90%of cases,leading to the solution of the problem.However,an estimated percentage of 4%to 20%reported residual pain and postural instability after the surgical treatment of discectomy.Method:We have examined a sample of patients,retrospectively registered,undergoing surgical treatment for degenerative lumbar disease.Some of them developed postural instability.They were subjected to cycles of postural gymnastics.Postural gymnastics has proved to be a tool capable of solving unstable post-surgical posture.It included an exercise of breathing,one or two of muscular distension,one of muscular reinforcement,and one of postural correction.We used an evaluation form we created in agreement with the physiatrist for postural exercises that was based on some basic parameters such as muscle and respiratory function.At each cycle,a score was attributed to the performance of muscular and respiratory exercise to evaluate the function and therefore the degree of instability(1–3=mild,4–7=medium,8–10=severe).Results:Results were satisfactory,with return to normal posture.The improvement of postural instability has been demonstrated both by the score of the evaluation forms that have highlighted the transition from a state of severe intensity to one of normality and by a clinical aspect,concerning the static and dynamic posture.Conclusions:The postural instability has a multifactorial genesis,and different mechanisms are involved:the vertebral bone structures and the pelvis,the paraspinal muscular structures,and the nerve structures.These structures are altered after surgery due to predisposing factors,and for the action of conditions acquired as obesity.