2,789 research outputs found

    The 1961 Kampong Bukit Ho Swee fire and the making of modern Singapore

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    By 1970, Singapore’s urban landscape was dominated by high-rise blocks of planned public housing built by the People’s Action Party government, signifying the establishment of a high modernist nation-state. A decade earlier, the margins of the City had been dominated by kampongs, home to semi-autonomous communities of low-income Chinese families which freely built, and rebuilt, unauthorised wooden houses. This change was not merely one of housing but belied a more fundamental realignment of state-society relations in the 1960s. Relocated in Housing and Development Board flats, urban kampong families were progressively integrated into the social fabric of the emergent nation-state. This study examines the pivotal role of an event, the great Kampong Bukit Ho Swee fire of 1961, in bringing about this transformation. The redevelopment of the fire site in the aftermath of the calamity brought to completion the British colonial regime’s ‘emergency’ programmes of resettling urban kampong dwellers in planned accommodation, in particular, of building emergency public housing on the sites of major fires in the 1950s. The PAP’s far greater political resolve, and the timing of and state of emergency occasioned by the scale of the 1961 disaster, enabled the government to rehouse the Bukit Ho Swee fire victims in emergency housing in record time. This in turn provided the HDB with a strategic platform for clearing other kampongs and for transforming their residents into model citizens of the nation-state. The 1961 fire’s symbolic usefulness extended into the 1980s and beyond, in sanctioning the PAP’s new housing redevelopment schemes. The official account of the inferno has also become politically useful for the government of today for disciplining a new generation of Singaporeans against taking the nation’s progress for granted. Against these exalted claims of the fire’s role in the Singapore Story, this study also examines the degree of actual change and continuity in the social and economic lives of the people of Bukit Ho Swee after the inferno. In some crucial ways, the residents continued to occupy a marginal place in society while pondering, too, over the unresolved question of the cause of the fire. These continuities of everyday life reflect the ambivalence with which the citizenry regarded the high modernist state in contemporary Singapore

    WAVE NUMBERS, STRENGTHS, WIDTHS AND SHIFTS WITH PRESSURE OF LINES OF 16O2^{16}O_{2} IN SYSTEMS a a1ΔgX3ga^{1}\Delta_{g} -X{^{3}}\sum^{-}_{g} AND b1g+X3gb{^{1}}\sum^{+}_{g} - X{^{3}}\sum^{-}_{g}

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    a^{a}S.-L. Cheah, Y.-P. Lee and J. F. Ogilvie, J. Quant. Spectrosc. Radiative Transfer, 64, 467-482 (2000)Author Institution: Department of Chemistry, National Tsing Hua University; Centre for Experimental and Constructive Mathematics, Department of Mathematics, Simon Fraser UniversityAnalysis of newly measured spectral dataadata^{a} for wave number and intensities of transitions of 16O2^{16}O_{2} in absorption in systems a1Δgν=0X3gν=0a{^{1}}\Delta_{g} \nu =0- X^{3}\sum^{-}_{g}\nu =0 and b1g+ν=0,1,2X3gν=0b{^{1}}\sum{_{g}}^{+} \nu=0, 1, 2 -X^{3}\sum{-{g}}^{-}\nu =0 with proper statistical treatment yields band parameters for excited states, based on parameters for the ground vibrational state valid up to J=41J=41, that are the most precise (σ=0.021,0.038,0.043,0.50m1\sigma = 0.021, 0.038, 0.043, 0.50 m^{-1} respectively) in published form, and strengths of lines that are internally consistent and in satisfactory agreement with other published values

    INFRARED SPECTRA OF 12C16O^{12}C^{16}O IN ABSORPTION AND EVALUATION OF RADIAL FUNCTIONS FOR POTENTIAL ENERGY AND ELECTRIC DIPOLAR MOMENT

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    a^{a}J. F. Ogilvie, S-L. Cheah, Y.-P. Lee and S. P. A. Sauer, Theoretical Chemistry Accounts, in press (2002) b^{b}J. F. Ogilvie, The Vibrational and Rotational Spectrometry of Diatomic Molecules, Academic Press, London U.K. (1998)Author Institution: Centre for Experimental and Constructive Mathematics Department of Mathematics Simon Fraser University; Department of Chemistry, National Tsing Hua University; Department of Chemistry, University of CopenhagenFrom quantum-chemical calculations of rotational g factor and new experimental measurements of strengths of lines in infrared spectra of vibration-rotational bands in absorptionaabsorption^{a}, with ν=0\nu^{\prime\prime} = 0 and 1ν41 \leq \nu^{\prime} \leq 4, of 12C16O^{12}C^{16}O, and from analysis of 16947 frequencies and wave numbers assigned to pure rotational and vibration-rotational transitions within electronic ground state X1+X {^{1}\sum^{+}}, including new measurements of band 404 - 0 of 12C16O^{12}C^{16}O, we evaluate radial functionsbfunctions^{b} for potential energy and electric dipolar moment, the latter both in polynomial form and as a rational function that has qualitatively correct behaviour under limiting conditions

    HIGH PERFORMANCE LAN INTERNETWORK DESIGN.

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    The author discusses the requirements of a versatile LAN internetwork design, and proposes a high-performance, fault-tolerant internetwork architecture. The major design goal is to preserve an LAN's characteristics, such as high capacity, low queuing delay, packets in sequence, low error rate, etc. , in the LAN internetworking environment so that high performance is achievable. The new architecture can support both packet and fast circuit switching. It is efficient for various applications with a wide range of channel holding times.</p

    An Interactive Tool for Teaching and Learning LAN Design

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    It is often difficult to motivate students to learn local area network (LAN) design because many students appear to find the subject rather dry, technical and boring. To overcome this problem the author has developed a software tool (named LAN-Designer) that gives students an interactive learning experience in LAN design concepts. The LAN-Designer is suitable for classroom use in introductory computer networking courses. This chapter describes LAN-Designer and its effectiveness in teaching and learning LAN design. The effectiveness of LAN-designer has been evaluated both formally by students and informally in discussion within the teaching team. The feedback from students indicates that the development and implementation of LAN-Designer were successful. It also discusses the impact of LAN-Designer on student learning and comprehension.</jats:p

    An Interactive Tool for Teaching and Learning LAN Design

    No full text
    It is often difficult to motivate students to learn local area network (LAN) design because many students appear to find the subject rather dry, technical and boring. To overcome this problem the author has developed a software tool (named LAN-Designer) that gives students an interactive learning experience in LAN design concepts. The LAN-Designer is suitable for classroom use in introductory computer networking courses. This chapter describes LAN-Designer and its effectiveness in teaching and learning LAN design. The effectiveness of LAN-designer has been evaluated both formally by students and informally in discussion within the teaching team. The feedback from students indicates that the development and implementation of LAN-Designer were successful. It also discusses the impact of LAN-Designer on student learning and comprehension. </jats:p

    ANALYSIS OF INTENSITIES OF SPECTRAL FEATURES OF GASEOUS NO IN VIBRATION-ROTATIONAL BAND 6-0 IN ABSORPTION

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    a^{a} J. F. Ogilvie, The Vibrational and Rotational Spectrometry of Diatomic Molecules [Academic Press, London U.K., 1998]Author Institution: Department of Chemistry, National Tsing Hua University; Escuela de Quimica, Universidad de Costa RicaWe have detected for the first time the fifth overtone of vibration-rotational transitions of NO in the near infrared region. Despite its small extent of absorption even with an optical path of length 107 m and pressure 105Nm210^{5} N m^{-2} of our sample, we have measured strengths of individual vibration-rotational features, but effects of A-doubling were unresolved under those conditions. An electric dipolar moment for the transition and a parameter for the effect of vibration-rotational interactionainteraction^{a} have been quantitatively evaluated

    Handover on a Highway LAN

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    Highway Local Area Networks (LANs) require small cell sizes in order to meet the demands for increased capacity which is induced by the large number of users in small areas. As smaller cells are deployed, the number of cell boundary crossings increases. Furthermore, the high velocities of the vehicles moving in a highway result in an increase in the frequency of cell boundary crossings. As a result, handover, defined as the mechanism that transfers an ongoing call from one cell to another as a user moves through the coverage area of the cellular system, will play a very important role in the design and the performance of the highway LAN. This report presents a general overview of handover mechanisms and proposes ways of applying handover on a highway LAN according to the network’s specific characteristics. In order to implement handover in a highway LAN, the modelling of the vehicle distribution and the radiowave propagation effects have been analyzed: The shifted negative exponential distribution can model both the spacing between the vehicles and the distance between the antenna of the base station and the nearest vehicle. The propagation environment is characterized by the path-loss attenuation, the Rice fading and the oxygen absorption (which has been ignored for the needs of this report). The phenomenon of shadowing has been neglected. A general overview of the handover mechanism, i.e. the goals of the handover procedure, performance metrics commonly used to evaluate handover algorithms, and the stages which constitute the procedure of handover, is presented. Handover mechanisms as applied in GSM and DECT have been investigated as examples of applied handover techniques. The issue of handover has not been addressed in the IEEE 802.11 and the HIPERLAN standards. Specific aspects of handover implied by the characteristics of the highway LAN have been examined. The propagation environment of a highway’s cell of 200 m. has been simulated using an exponential smoothing process. The averaging process has provided considerably accurate results and the crossover point can be adequately approximated. An absolute signal strength with velocity adjustable threshold algorithm is recommended for the handover decision procedure. The threshold levels are dynamically adjusted according to the velocity of each vehicle, that is, the higher the velocity of the vehicle is, the higher is the threshold value set. The Signal Prediction Priority Queuing (SPPQ) method is analyzed and proposed, in order to provide the optimum order in the execution of the handovers. A multicast-based handover scheme, known as sub-group buffering scheme, can be adopted in order to accomplish seamless communication service. Any numerical results obtained can not be used for the precise calculation of the parameters involved in the handover procedure, due to various arbitrary assumptions and simplifications. The propagation model still needs to be verified through actual measurements. However, the basic aspects of the handover mechanism have been extensively presented and the various approaches and proposed schemes could form the basis of the handover procedure to be implemented on a highway LAN.Electrical Engineering, Mathematics and Computer ScienceTelecommunicatie- en Verkeersbegeleidingssysteme
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