煤气杂质对城市煤气输配的危害及对策

分析煤气中杂质对城市煤气输配的危害性,探讨保证煤气质量的具体措施。     

中国煤气热力期刊编辑研究会举行第九届会议

<正> 第九届中国煤气热力期刊编辑研究会于1998年8月5日～8日在山西省太原市召开,有《煤气与热力》、《城市煤气》、《区域供热》、《城市公用事业》、《煤化工》、《江苏煤气》、《上海煤气》等11个编辑部共计18人参加。会议的目的是交流办刊经验,提高刊物质量,探讨当前科技期刊界普遍关注的问题;加强横向联系,在各自办刊     

管道煤气的安全使用

管道煤气的安全使用城市煤气可分为天然气和人工气两大类。天然气是自然形成的地厂矿藏，经开采即可供应使用。人工气主要是从固体燃料加工后得到的可燃气体。如兰州居民使用的管道煤气，是将原料煤经高压气化后生产出的．经长输管线调压输送，供居民使用。煤气与液化石油...     

煤气管线周边隐蔽空间的安全防护

本文介绍了煤气管线周边隐蔽空间已成为引发煤气泄漏爆炸事故的隐患以及依据法规、整改处理、重点设防、加强巡线等防范措施。     

影响煤气孔板流量计精确度的因素及对策

结合孔板流量计的实际使用情况,探讨了如煤气密度(组分)变化、煤气含水量、煤气中的杂质、二次仪表的误差等这些造成孔板流量计精确度下降的主要因素,并提出了诸如修正密度、处理水和水蒸气、定期清洗、吹扫计量装置、定期校验二次仪表等改进措施。     

上海建立公正燃气计量站

<正> 随着燃气体制改革的深化,煤气生产与销售分离。由于管理、技术等方面的原因,煤气供应存在“跑、冒、滴、漏”的现象,再加上统计口径不一致,产与销之间的燃气量往往有较大差异。上海市每年煤气产值接     

生活顾问

烧煤气火力 不可调到最小 为 节 省 煤 气 用 量 ,多家庭在焖米饭、炖(煲)时,都爱将煤气火力调到最小程度,且持续很长时间。这样做很危险。因为在燃烧量最小的时候,煤气中的可燃元素处于非白炽状态,会产生较多的一氧化碳气体,若室内通风条件不好,就会造成一氧化碳气体积聚,严     

人工煤气今年七月退出北京

<正>为实现绿色奥运,建于1959年的北京焦化厂迁往河北省唐山市,去年11月底,异地迁建的新焦化厂在唐山市投产,旧“北焦”将于今年7月停止为北京生产人工煤气。至此,北京人使用人工煤气将成历史,目前7．5万户仍使用人工煤气的居     

生活顾问

煤气灶不可长时间小火燃烧 为节省煤气,许多人在焖米饭、煲汤时爱将煤气火力调到最小程度,且持续很长时间。这样做是危险的,因为这时煤气中的可燃元素处于非白炽状态,会产生较多的一氧化碳气体,若室内通风条件不好,就会造成一氧化碳气体积聚,严重污染空气,影响人体健康,甚至     

煤气循环冷却水pH值的控制

该文对发生炉煤气净化、冷却过程中,与煤气直接接触的循环水pH值偏低问题进行探讨。并提出通过碱液添加装置的应用以达到均匀滴加碱液,可以有效地控制循环水的pH值。     

Narratives from the neighbourhood: The discursive construction of integration problems in talkback radio1

This paper examines how speakers deploy narrative devices in talking about Sudanese refugees. Particularly, we show how narrative constructions form an important basis for the advancement of accounts about integration problems into the local polity. We analyse talkback ‘phone‐in’ calls to a local Adelaide radio station that provide callers an opportunity to give accounts of events and social phenomena that concern them in their local settings. Analysis shows that speakers regularly deployed narrative constructions, first‐hand ‘witnessing’ devices that functioned to legitimate accounts as veridical versions of events, and contrast devices to explicate the moral and behavioural aberrance of Sudanese refugees. The analysis illustrates how these discursive devices function rhetorically in interaction, in ways that differentiate Sudanese refugees as problematic. Through this analysis, we contend that narrative devices precipitate and bolster socio‐political policies that have serious, negative consequences for Sudanese refugees.     

Why Digital Tools Have Not Yet Revolutionized Adolescent Health Research and What We Can Do

The promise of digital tools and devices for spurring new discoveries in adolescent health research is enticing. This special section draws attention to many of the advantages that mobile and wearable devices offer for ambulatory assessment research, which have now been realized. Despite such progress, digital tools have not yet delivered on their predicted revolution of adolescent health research. I offer four reasons for why digital devices have fallen short of this predicted promise. For each barrier, I suggest parallel strategies for ensuring adolescent research benefits from Ambulatory Assessment advances. To avoid missing out on opportunities to support young people, adolescence scholarship must develop in time with innovations in digital devices and platforms and move past what has, to date, been an overwhelming focus on fears about their usage.     

At Home with Media Technology

ABSTRACT

People's engagement with media devices in the domestic sphere varies greatly, as do the decisions they make regarding when, where, and how the devices are utilized. How do we organize our houses for media consumption and/or creation? How do our houses' spatial configurations affect our media consumption and habits? How does time play a role in media engagement? These questions directly relate to design—our homes are both spatially and temporally designed—by us, and for us. The design issues of creating and maintaining a “home” are compounded by the various media devices we use—telephone, TV, stereo, Internet-enabled computer, and so on. We not only “design” how we use these devices, but where and when they are used. In this context, media devices are not passive objects, but rather through our engagement with them, they alter domestic space/time, and may ultimately challenge how we understand and define domesticity. Media technology simultaneously constructs new, and interrupts existing, domestic territories. We will explore the reciprocal impact of domestic space/time and media technology, with a view to revealing the ways in which this nexus becomes a question of design.     

TUNE OUT: MUSIC, SOUNDSCAPES AND THE URBAN MISE-EN-SCÈNE

This paper focuses upon the intersection between the MP3 player and the city. In particular it takes issue with arguments concerning the ways in which mobile music devices enable a 'recomposition' of the urban soundscape. Drawing upon Michael Bull's work on the management of the experience of the time and space of the city, as facilitated through various mobile music reproduction devices, this piece questions Bull's central claim that these devices may be used to screen out the urban soundscape. Here it is argued that these mobile music systems merely enable users to tune out of the immediate soundscape - by prioritizing the musical information overlay over the physicality of the urban environment - but that this is often interrupted by the complex imbrications of the pervasive sounds of the city.     

Proper manual handling techniques to prevent low back pain, a Cochrane systematic review

Training and provision of assistive devices are considered major interventions to prevent and treat low back pain (LBP) among workers exposed to manual material handling (MMH). To establish the effectiveness of training and provision of assistive devices in preventing and treating LBP an update of a Cochrane literature review was performed to November 2010. Randomised controlled trials (RCTs) and cohort studies with a concurrent control group (CCTs) were included. Nine RCTs (20.101 employees) and nine CCTs (1280 employees) were included for prevention: six more than in the previous version. No study on treatment was found. None of the included RCTs and CCTs provided evidence that training and provision of assistive devices prevented LBP when compared to no intervention or another intervention.     

Pension contributions as a commitment device: Evidence of sophistication among time-inconsistent households

Sophisticated agents who are aware of their self-control problems value commitment devices that constrain future choices. Using Australian household data I test whether these households value commitment devices in the form of illiquid pension contributions. Estimating probabilistic choice models, the results confirm the conjecture that households with problems of self-control are more likely to invest in illiquid pensions while less likely to hold very liquid forms of assets.     

The Selfobject in the Age of Technology

The author considers self-psychology concepts including the selfobject and influences on self-esteem in the observation and exploration of the significance patients assigned to their cellular telephones, computers, and other electronic communication devices. The intrusion of these devices in sessions and their presence in the patients lives is explored.     

Premarital sexual permissiveness and contraceptive knowledge: A biracial comparison of college students

The relationship between college students' knowledge of contraceptive devices and techniques and their attitudes toward premarital sexual permissiveness was investigated. This study examined selected background variables of the respondents to determine possible effects on the relationship. The sample was composed of 392 students enrolled in a college and a university in Virginia. A questionnaire was developed which included a premarital sexual permissiveness scale, an instrument measuring knowledge of contraceptive devices and techniques devised by the investigators, and items gathering information on background variables.

A positive relationship was found to exist between knowledge of contraceptive devices and techniques and premarital sexual permissiveness. As permissiveness scores increased, knowledge scores tended to follow a similar trend. Sex and race of the respondent influenced this relationship. Males were found to be more permissive but less knowledgeable than females. Whites tended to be more knowledgeable about contraception than blacks, but both groups were about equally permissive.     

Use-related risk analysis for medical devices based on improved FMEA

In order to effectively analyze and control use-related risk of medical devices, quantitative methodologies must be applied. Failure Mode and Effects Analysis (FMEA) is a proactive technique for error detection and risk reduction. In this article, an improved FMEA based on Fuzzy Mathematics and Grey Relational Theory is developed to better carry out user-related risk analysis for medical devices. As an example, the analysis process using this improved FMEA method for a certain medical device (C-arm X-ray machine) is described.     

The effect of format and device on the performance and usability of web-based questionnaires

This article explores the comparability of assessment tools under different format conditions. Prior studies have not considered the interaction of format and device on time to complete an assessment and have instead treated each of them separately with conflicting results. This study assesses, by linear regressions using web-based data, the performance of multiple devices under varying formats while controlling for non-device factors such as demographic information. The results of this study add to the growing literature on the equivalence among devices and formats used to collect and interpret performance in a variety of organizational settings.