The ‘Oxylog’: an evaluation

Abstract

The Oxylog is a portable instrument designed to measure the oxygen consumption ([Vdot]0₂) an ambulatory subject. Steady-state measurements have been made, using an Oxylog, of inspiratory volume ( [Vdot]₁) [Vdot]0₂ during bicycle ergometer exercise at work rates ranging from 30 to 150 W. These measurements have been compared with simultaneous measurements of expiratory volume ([Vdot] _E) and [Vdot]O₂ made using a dry gas meter and mass spectrometer.

Four experiments were conducted, during which a total of 433 comparative measurements were made. In two experiments the Oxylog significantly underestimated [Vdot]O₂ (by 4-4 and 5-6%). Averaging over the four experiments, however, the underestimate reduced to 1-5%, which could be accounted for by a respiratory exchange ratio of approximately 0-9. There was, overall, no significant difference between [Vdot] ₁ and [Vdot] _E.

It is concluded that the Oxylog is sufficiently accurate for the reliable determination of [Vdot]0₂ and of energy expenditure under field conditions.     

Escaping ‘localisms’ in IT sourcing: tracing changes in institutional logics in an Italian firm

Organizations are limited in their choices by the institutional environment in which they operate. This is particularly true for IT sourcing decisions that go beyond cost considerations and are constrained by traditions, geographical location, and social networks. This article investigates how a company can disentangle itself from the constraints of the institutional environment. We do so drawing on a longitudinal case study of an Italian SME active in the steel industry that successfully changed its institutionally sound, but increasingly inefficient, IT sourcing practice. Our main result suggests that by attending steadily to institutional logics, organizations can become selective in how the institutional environment influences them and act more purposefully in their decisions. In particular, through the creation of companywide IT management competencies and targeted hiring practices, organizations can strike a balance between the different institutional logics guiding IT sourcing decisions and eventually shift from the dominant logic of localism to a logic of market efficiency. This change does not depend from a choice but rather builds on a process through which IT management competences are slowly integrated in the organization.     

Design of robotic arm’s action to imitate the mechanism of an animal’s consciousness

We are attempting to develop a system so that a user is able to let robots perform an intellectual action that has a healing and friendly feeling. Based on the development process of the actions and consciousness of animals, we constructed a structure model which connects consciousness and action hierarchically, built a valuation function for action selection, and developed software to control the action of a robot. This software is called Consciousness-Based Architecture (CBA). With it, our aim is to connect a user and robot as closely as possible and to allow smooth communications between them by developing an emotional system that takes notice of consciousness. In our system, the robotic arm’s finger is outfitted with a small Web camera, which allows the arm to recognize external information so that the robot can select various actions that comply with certain factors in the outside environment. Furthermore, by using the actuator of the robotic arm, the system we have built provides a correspondence between the robot’s internal states, such as the degree of rotation angle, and the outside temperature. In the present study, a motivation model which considers the outside environment and the internal states has been built into the CBA, and the behavior of the robotic arm has been verified.     

A reflexive analysis of ‘context’ in privacy research: Two case studies in HIV care

Privacy is a much discussed and politically charged topic in contemporary healthcare. Yet, studying the actual privacy practices of healthcare professionals and patients remains extremely challenging. In this paper we reflect on our experiences using qualitative methods in two projects on HIV care, the first researching internet use by a particular group of patients, and the second looking at issues of information technology integration in hospitals. Our aim in doing so is to highlight some of the opportunities and challenges involved in including an explicit focus on ‘context’ in qualitative privacy research in healthcare. We suggest that adopting a more reflexive approach to the way methods are used in relation to ‘context’ in privacy-related HCI research provides opportunities for understanding how different ‘privacy contexts’ are enacted in and through our research practices in different environments.     

今年节日大不同，IT礼品‘新’风尚

岁末将至，各家IT厂商又开始了热火朝天的忙碌。圣诞、元旦、春节，短短不到两个月的时间，中西方最重要的三个节日齐聚一堂。这可乐坏了各家IT厂商和各地经销商。因为按照中国的习惯，在节日购买数码IT产品几乎成了一种定式，更何况过年这样的大节。这就不难理解为什么各地数码大厦、IT卖场都在这段时间大张旗鼓、拿出浑身解数来进行促销活动，降价、打折、送礼变着花样的吸引消费者。     

Untangling the ‘Dark Web’: an emerging technological challenge for the criminal law

The Dark Web, and the technology which underpins it, is fundamentally changing how crime is conducted. It is an enabler of cross-border, truly international crime where each of the major actors, evidence, and the proceeds of crime can all be in different jurisdictions. The technologies utilised mask the identity of individuals and the nature of the crimes committed. It is these complexities, and law’s inability to deal with them, which this paper will focus on. It critically analyses six intersecting and overlapping themes in order to highlight the technological challenges posed by the Dark Web to the criminal law. The paper argues that the current approaches, regulatory structures, legislation and investigative methods are all unfit for purpose. There is little to suggest the law is any closer to restricting Dark Web crime, particularly given a substantial amount of the challenges posed are unsolved traditional issues, in a new form.     

‘1966 and all that’: Trends and developments in UK ergonomics during the 1960s

The 1960s represents a key decade in the expansion of ergonomics within the UK. This paper reviews trends and developments that emerged out of the 1960s and compares these with ergonomics research and practice today. The focus in particular is on the expansion of ergonomics as a discipline within industry, as well as more specific topics, such as the emergence of areas of interest, for example, computers and technology, automation and systems ergonomics and consumer ergonomics. The account is illustrated with a detailed timeline of developments, a set of industrial case studies and the contents of important publications during the decade. A key aim of the paper is to provide the opportunity to reflect on the past and the implications this may have for future directions for ergonomics within the UK.

The paper provides practitioners with an insight into the development of ergonomics in the UK during one of the most important decades of its history. This is especially relevant given the fact that in 2009 the Ergonomics Society celebrates its 60th anniversary.     

Rethinking ‘IT/IS use in a technological mature society’ from the actuality point of view: critical learning in reflection on SSM meeting about ‘IT/IS use’

The history of the human-centered system movement (Gill in AI Soc 10(2), 1996) tells us that information technology (referred to as IT below) has come to dominate our life-world or societal functions. Since from 1990s, its streaming influence could be called ‘abnormal.’ Since entering the twenty-first century, the IT system has been on automatic acceleration and has been spreading more and more rapidly to many facets of our lives. In many sectors, this ubiquitous streaming of IT is seen to be central to societal development, and in a Japanese sense, IT could be seen as a resource to realizing technologically a mature society. This trend of IT seems to be unstoppable. In this sense, IT dominance can be regarded as abnormal to the point that IT-centered information systems (referred to as IS below) fall far short of the deep appreciation of the complex and diverse life needs of people and societies, and this leads to the implementation of IT/IS from technological perspective, with a belief that everything, which we can do could be and should be, done now by IT/IS. However, as IT/IS have become to be embedded in many facets of societies and are influencing over our everyday life, we need to examine them not from the point of ‘capability’ but ‘allowability,’ in other words, not from the perspective of technology (cognition), but from the prospective of intuition and feeling of actual life (action). We term reality as seen in the narrow sense of cognition and actuality as seen in terms of action (Uchiyama in Theory and practice of actuality, Daito Bunka University, Tokyo, 2003). We draw a distinction between the two classes of ‘IT/IS’ systems, those which belong to the ‘reality’ and those which belong to the ‘actuality.’ To appreciate this distinction, we propose that this requires not only an understanding of the design of these IT systems but of the methodology of their use and their evaluation. To carry out the process of evaluation of IT/IS systems, we need to develop a new ‘appreciation’ methodology which enables us to rethink ‘IT/IS’ as ‘A system to use IT/IS.’ This idea is similar to the idea of Beck’s (World risk society theory (trans: Shimamura K), Chikuma Scholastic Collection (in Japanese), 2010) reflecting the modern. So, we propose a strict distinction between the two systems classes of ‘IT/IS’ which we call belonging to the ‘reality’ and ‘A system to use IT/IS’ which we call belonging to the ‘actuality.’ The methodology to deal with ‘actuality’ has not yet been developed, but Checkland and Poulter’s (Learning for action, Wiley, New York, 2006) soft systems methodology (referred to as SSM below) intends to deal with this kind of class of systems, that is, ‘human activity systems.’ He uses the key concept of ‘accommodation’ which means ‘to live with different individual world views based on sharing of actuality,’ and thus, he proposes to overcome the idea of consensus which is the agreement with the ‘reality’ level. In this paper, we adopt a methodology based on the SSM’s accommodation and not based on the consensus on the ‘reality’ level. By using such a methodological thinking, we reconsider the problem of evolving technologically a mature society which can be seen as a problem relevant to ‘A system using IT/IS’ rather than the problem of IT/IS itself. In doing so, we could draw some innovative orientations in the field of IT/IS which by traditional methodology could not be drawn. It is not certain whether our attempt could make a difference to the runaway of IT/IS. We illustrate this purpose by studying a workshop process which highlights that even participating experts of IT/IS themselves felt apprehensive about the more and more focus on the implementation of IT/IS solutions both in the present and the future. We believe that the first step toward this purpose is to explore the new orientation of IT/IS use. The aim of this first step is to make a difference to the ‘abnormal’ situation and hope to create a foothold for the reorientation of ‘A system to use IT/IS.’     

The realignment of offshoring frame disputes (OFD): an ethnographic ‘cultural’ analysis

In Information Systems (IS) research on cross-cultural issues, cultural categories are typically introduced as analytical labels that explain why and how organizational groups in different parts of the world act and think differently. However, broad cultural categories can also be discursively mobilized by organizational members as strategic adaptive resources. Drawing on an ethnographic study of offshoring frame disputes (OFD) in an Indian subsidiary unit of a large Western information technology (IT) organization, this paper explores how members actively invoke a series of beliefs about Western culture and implicitly position them as the binary opposite of Eastern (or Indian) culture. The findings demonstrate how the mobilization of such beliefs eventually plays a vital role in the reconciliation of four different types of OFD. Drawing on this analysis, I build a social–psychological process model that explains how frame extensions trigger a cognitive reorganization process, leading to the accomplishment of OFD realignment. The paper argues that discursively invoked binary cultural categories help maintain non-confrontational definitions of situations and sustain working relationships in IT offshoring environments. Furthermore, interpretations linked to cultural notions seem to reflexively take the offshore–onshore power differentials into account.     

Toward Better Understanding of Task Difficulty during Physicians’ Interaction with Electronic Health Record System (EHRs)

ABSTRACT

The goal of this study was to assess the relationship of task difficulty and mental effort with performance during physicians’ interaction with electronic health records (EHRs). A total of 38 physicians were asked to identify abnormal results and take follow-up action to “close the loop” on care delivery. Task difficulty was quantified via task-flow strategies and computer mouse-click patterns. Mental effort was quantified using eye movements based on changes in pupillary dilations (task evoked pupillary response or TEPR) and blink rate. Performance was quantified based on commission errors (error vs. no-error). Results indicated that physicians had different task-flow strategies; however, with improved awareness of the patient status, they exhibited an optimal task-flow strategy. Overall, performance was related to task-flow strategies, computer mouse-click patterns, and blink rate, indicating that physicians had lower task-difficulty and experienced lower mental effort with improved awareness of patient follow-up status. This is an important finding demonstrating that task-flows are a dominant predictor of physician performance when comparing between EHR designs. On the contrary, mouse-click patterns and blink rate are both useful predictors of physician performance when assessment was done within an EHR.     

IT managers’ vs. IT auditors’ perceptions of risks: An actor–observer asymmetry perspective

With the growing role of information technology (IT), many organizations struggle with IT-related risks. Both IT managers and IT auditors are involved in assessing, monitoring, and reporting IT risks, but this does not necessarily mean that they share the same views. In this study, we draw upon the actor–observer asymmetry perspective to understand differences in IT managers’ vs. IT auditors’ perceptions of risks. Through a quasi-experiment with 76 employees of a financial institution, we found that IT managers and IT auditors showed the expected actor–observer differences. Implications for both research and practice are discussed.     

The ‘Japan problem’ in science and technology and basic research as a culture

This paper analyses the Japan Problem in science and technology from the viewpoint of the cultural factors involved. The selective use of contrary images of society depending on social context gives rise to a self-amplification of the problem. The paper critically examines what such generating mechanisms imply for a linear model connecting scientific, technological and economic performances. By focusing on the Science and Technology Basic Law and Plan approved in Japan in 1995 and 1996, it argues that measures taken for the promotion of basic research and creativity without giving due consideration to the relevant cultural factors provide an unsound basis for evaluating basic research. The paper argues that self-organisation by self-reference could provide an important general principle for human-centred science and technology policy, and especially policy for basic research.With Senior Associate Membership of St Antony's College, University of Oxford, UK for 1998–1999     

How to ‘find’ an error minimized genetic code: neutral emergence as an alternative to direct Darwinian selection for evolutionary optimization

Error minimization (EM) of the standard genetic code (SGC) refers to the assignment of amino acids to codons in such a way that the deleterious impact of mutations is reduced. The SGC is nearly optimal for the property of EM, compared to randomly generated codes, and prompts the question of how the property arose. Brute force searching of alternative genetic codes is unlikely to have occurred, given the high number of alternative codes. Therefore, a heuristic search of ‘code space’, the space of alternative codes, would have been necessary. Uncovering the nature of this heuristic search is key to understanding the evolution of the genetic code, and consequently the origin of life. Scenarios that rely on direct selection for the property of EM require codon reassignments to sample code space, but these are problematic mechanistically. Alternatively, it has been shown that EM may have emerged in a neutral fashion as a byproduct of the process of genetic code expansion. In this scenario, similar amino acids are added to similar codons via the gene duplication of tRNAs and aminoacyl-tRNA synthetases. Mimicking this process via simulation indeed produces high levels of EM in the resulting genetic codes. These observations imply that optimization has occurred by an alternative to direct selection, commonly viewed as the only form of evolutionary optimization followed in nature. I propose that the neutral emergence of EM produced by code expansion is a genetic algorithm but unlike direct selection, the local selection criterion (amino acid and codon similarity) is distant from the global fitness function (EM), leading to the emergent optimization of EM. By presenting this counter example I clarify how evolutionary optimization in biological systems is not restricted to direct selection, and emphasize that additional processes may lead to the production of beneficial traits, via ‘non-Darwinian optimization’.

     

Visualization of curvature plots and evaluation of fairness: an analysis of the effect of ‘scaling’

Changing the aspect-ratio (scale) of a graphical plot significantly affects the “messages” getting across to a viewer. This is true also for curvature plots and other graphs currently used in Curve & Surface Modeling to evaluate fairness. In particular, the sharp corners appearing in such graphs, employed as local fairness indicators by current practices, are significantly affected by nonuniform scaling. A detailed study of this phenomenon is presented offering specific guidelines for correctly “reading” curvature plots.     

‘Mind the Gap’: diagnosing the relationship between the IT organisation and the rest of the business

The senior management of many organisations are continually disappointed with the benefits and value which they perceive they are getting from their investments in IT. This frustration with IT, and in particular with the IT function, has seen many organisations choose to rid themselves of the ‘problem’ altogether by outsourcing IT activities to a third party. The fact that there is a separate organisational unit responsible for IT activities has led to the emergence of gap between this so called IT organisation and the rest of the business. Culture is often used to explain the gap as if this somehow justifies an organisations inability to effectively leverage IT. However, the premise underlying this article is that culture is an excuse for rather than a cause of ineffective application of IT for business benefits and value. The clear message from this article is that achieving high performance from IT is not just about the IT function's ability to build, maintain and deliver systems, but is an organisational wide activity requiring a strong business/IT partnership. A framework grounded in the research literature, which identifies the elements to manage in creating high performance from IT, is developed and operationalised. The findings of an exploratory survey are presented and research and practitioner implications developed.