The Nature of Decision Making in the Practice of Dwelling: A Practice Theoretical Approach to Understanding Maintenance and Retrofitting of Homes in the Context of Climate Change     

Håkon Fyhn  Nina Baron 《社会与自然资源》2017,30(5):555-568

In order to make existing private housing more energy efficient, various policies aim at influencing decisions made by homeowners regarding renovation and retrofitting in Scandinavia. Presenting two case studies from Denmark and Norway, we take one step back and observe the whole process of keeping a home habitable. Inspired by theories of Tim Ingold and Elizabeth Shove, we suggest calling this process “the practice of dwelling.” Rather than focusing on decisions and acts pertaining to retrofitting alone, we observe how maintenance and retrofitting are parts of an ongoing practice of dwelling. The cases demonstrate how decisions can be understood as embedded in the practice of dwelling, and how a readiness for decisions regarding retrofitting is created, or not, in this practice. We suggest shifting focus from the outcome of decisions, to attention toward the process that leads to readiness for making the decision in the first place.  相似文献   

Inhomogeneities in the circumstellar envelope of the A0E herbig star AB aur     

Nina Beskrovnaya  Mikhail Pogodin  Ivan Najdenov  Iosiff Romanyuk 《Astrophysics and Space Science》1995,224(1-2):429-430

Simultaneous high-resolution spectroscopy in H andUBVRI polarimetric observations are proposed as an effective method for the search for circumstellar inhomogeneities in A0-type Herbig stars. The new results for AB Aur are presented as a successful example of the use of this method. The analysis of about 100 CCD H profiles (R = 30 000) and more than 150 polarimetric measurements obtained in January, 1994 allowed to discover a long-lived stream-like inhomogeneity in the circumstellar gaseous envelope.  相似文献   

Distribution of Themisto (Amphipoda) spp. in the Barents Sea and predator-prey interactions     

Dalpadado  Padmini; Borkner  Nina; Bogstad  Bjarte; Mehl  Sigbjorn 《ICES Journal of Marine Science》2001,58(4):876-895

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Anaerobic oxidation of methane (AOM) in marine sediments from the Skagerrak (Denmark): I. Geochemical and microbiological analyses     

Nina J. Knab  Barry A. Cragg  R. John Parkes  Bo B. Jørgensen 《Geochimica et cosmochimica acta》2008,72(12):2868-2879

The organic rich sediments of the Skagerrak contain high quantities of shallow gas of mostly biogenic origin that is transported to the sediment surface by diffusion. The sulfate methane transition zone (SMTZ), where anaerobic oxidation of methane (AOM) and sulfate reduction occur, functions as a methane barrier for this upward diffusing methane.To investigate the regulation of AOM and sulfate reduction rates (SRR) and the controls on the efficiency of methane consumption, pore water concentrations, and microbial rates of AOM, sulfate reduction and methanogenesis were determined in three gravity cores collected along the slope of the Norwegian Trench in the Skagerrak. SRR occurred in two distinct peaks, at the sediment surface and the SMTZ, the latter often exceeding the peak AOM rates that occurred at the bottom of the SMTZ. Highest rates of both AOM and SRR were observed in a core from a pockmark, where advective methane transport occurred, generating high methane and sulfate fluxes. But even at this site with a shallow SMTZ, the entire flux of methane was oxidized below the sediment surface. AOM, SRR and methanogenesis seem to be closely associated and strongly regulated by sulfate concentrations, which were, in turn, regulated by the methane flux. Rate measurements of SRR, AOM and methanogenesis revealed a tight coupling of these processes. Bicarbonate-based methanogenesis occurred at moderate sulfate concentrations (>5 mM) above the AOM zone but seemed to be inhibited in the depth where AOM occurred. The unbalanced stoichiometry of AOM and SRR in the SMTZ was more pronounced in rate measurements than in methane and sulfate fluxes, and seemed more likely be related to enhanced SRR in this zone than an underestimation of methane fluxes.  相似文献   

Bioactive compounds of sea cucumbers and their therapeutic effects   总被引：1，自引：0，他引：1  

时淑娟  冯文静  胡松  梁世秀  安妮娜  毛拥军 《中国海洋湖沼学报》2016,34(3):549-558

Sea cucumbers belong to the Class Holothuroidea of marine invertebrates. They are commercially valuable and prized as a food and folk medicine in Asia. Nutritionally, sea cucumbers have an impressive profile of valuable nutrients such as vitamins, minerals and amino acids. A number of unique biological and pharmacological activities/properties, including anticancer, anticoagulant/antithrombotic, antimicrobial, antioxidant, antihyperlipidemic, antihyperglycemic, anti-inflammatory, antihypertension and radioprotective, have been ascribed to various compounds isolated from sea cucumbers. The therapeutic properties and medicinal benefits of sea cucumbers can be linked to the presence of a wide array of bioactives, especially triterpene glycosides, acid mucopolysaccharide, sphingoid bases, glycolipids, fucosylated chondroitin sulfate, polysaccharides, phospholipids, cerebrosides, phosphatidylcholines, and other extracts and hydrolysates. This review highlights the valuable bioactive components as well as the multiple therapeutic properties of sea cucumbers with a view to exploring their potential uses as functional foods and a natural source of new multifunctional drugs.  相似文献   

Cyclic shakedown of piles subjected to two‐dimensional lateral loading     

Nina H. Levy  Itai Einav  Tim Hull 《国际地质力学数值与分析法杂志》2009,33(10):1339-1361

Pile foundations are frequently subjected to cyclic lateral loads. Wave and wind loads on offshore structures will be applied in different directions and times during the design life of a structure. Therefore, the magnitude and direction of these loads in conjunction with the dead loads should be considered. This paper investigates a loading scenario where a monotonic lateral load is applied to a pile, followed by two‐way cycling in a direction perpendicular to the initial loading. This configuration is indicative of the complexity of loading that may be considered and is referred to in the paper as ‘T‐shaped’ loading. The energy‐based numerical model employed considers two‐dimensional lateral loading in an elasto‐plastic soil, with coupled behaviour between the two perpendicular directions by local yield surfaces along the length of the pile. The behaviour of the soil–pile system subjected to different loading combinations has been divided into four categories of shakedown previously proposed for cyclic loading of structures and soils. A design chart has been created to illustrate the type of pile behaviour for a given two‐dimensional loading scenario. Copyright © 2009 John Wiley & Sons, Ltd.  相似文献   

Lost and found     

Svetlana Nikolaeva  & Nina Morgan 《Geology Today》2010,26(1):16-20

Consulting type specimens is a necessary element of taxonomic research in palaeontology. Every taxonomist from time to time has to examine the types to make sure that the identifications are correct. This can be a difficult proposition when the fossils in question were collected in the early nineteenth century. But just because a historical fossil collection is said to be 'lost', doesn't mean it cannot be found.  相似文献   

Cirque infills in the Khibiny Mountains,Kola Peninsula,Russia — palaeoglaciological interpretations and modern analogues in East Antarctica     

Clas Hättestrand  Vasili Kolka  Nina Johansen 《第四纪科学杂志》2008,23(2):165-174

We report here on cirque infills mapped in the Khibiny Mountains, Kola Peninsula, Russia. Cirque infills are morainic deposits located near the headwalls of valleys and cirques. Their location and shape, often with concave margins towards the valley side, indicate that they were deposited by ice flowing up‐valley, into the mountains, rather than by local glaciers. We suggest that they formed during the last deglaciation, when Khibiny was a nunatak and Fennoscandian ice sheet lobes extended into valleys and cirques of the massif. The formation of cirque infills is probably more related to ice sheet dynamic factors, occurring when the ice margin retreated from the cirques, than to climate‐driven interruption in the ice‐marginal retreat. Glacial conditions similar to those prevalent when the Khibiny cirque infills were formed, occur today in Antarctica where the ice sheets engulf nunatak ranges. In Heimefrontfjella, Antarctica, the formation of supraglacial moraines at the head of cirques are linked to blue‐ice conditions, indicating locally low accumulation rates, a dry continental climate and sublimation dominated ablation. We suggest that these Antarctic moraines are modern analogues of cirque infills on the Kola Peninsula, and possibly, that the cirque infills may be used as palaeoenvironmental indicators. Copyright © 2007 John Wiley & Sons, Ltd.  相似文献   

Late Pleistocene sedimentary history of multiple glacially dammed lake episodes along the Yarlung-Tsangpo river,southeast Tibet     

Shao-Yi Huang  Yue-Gau Chen  George S. Burr  Manoj K. Jaiswal  Yunung Nina Lin  Gongming Yin  Jingwei Liu  Shujun Zhao  Zhongquan Cao 《Quaternary Research》2014

We present a reconstructed lithologic column compiled from a series of lacustrine outcrops along a tributary of the Nyang River, a major tributary of the Yarlung-Tsangpo in southeast Tibet. The deposits were preserved between terraces at altitudes of 2950–3100 m asl. The stratigraphic record features at least two sets of coarsening-upward sequences depicting episodic aggradation and progradation of a glacially dammed lake related delta. Recognized facies changes illustrate the evolution cycles of depositional environments from pro-delta, delta front, to delta plain. Radiocarbon and optically stimulated luminescence dates reveal an aging-downward trend in stratigraphic order and provide an approximate timeline for the formation of glacially dammed lakes in late Pleistocene. This result reflects that the Zelunglung Glacier had progressively advanced to block the Yarlung-Tsangpo river and the dam materials had stepwise stacked up to an altitude of 3095 m asl during Marine Oxygen Isotope Stages 4 to 2.  相似文献   

Incorporating neighborhood scale effects into land loss modeling using semivariograms     

Cai  Heng  Lam  Nina S. N.  Zou  Lei 《Journal of Geographical Systems》2022,24(3):419-439

Journal of Geographical Systems - Scale effects are pervasive in geospatial modeling and affect the reliability of analysis results. This paper examines the neighborhood scale effects on the...  相似文献