How to develop corporate real estate? A decision support tool for CREM

Dorr, Anne,Pfnur, Andreas Korea Institute of Construction Engineering and Ma 2017 Journal of construction engineering and project ma Vol.7 No.2

Various forms of procurement are open to companies when constructing new owner-occupied properties. The selection of a form of procurement is an important decision-making problem for companies and their Corporate Real Estate Management (CREM) departments. With this in mind, a decision support tool has been developed to optimise the outcome and success of company's proposed real estate development projects and is presented in this paper. This model can also be used for current real estate portfolios to optimise returns in the long term. In pursuit of this objective and in order to provide an academic basis for this study, decision-relevant goals and parameters were initially identified from the referenced literature used in our research. These were subsequently evaluated in a case study of a corporate development project and identified as specific decision criteria from the perspective of the CREM. The investigation identified 15 criteria that are relevant to the corporate decision-making process in procuring and/or developing property. A model for supporting and resolving decision-making problems of this type was derived from decision theory. In this paper, a decision-making tool is presented that takes into account all the decision criteria from the CREM point of view for the first time. This model should therefore serve as an aid in implementing the decision-making process for the development of real estate projects in a more structured and transparent manner.

생태전환의 압력과 노동조합 : 독일 자동차 산업의 사례

Klaus Dorre 한국노동연구원 2023 국제노동브리프 Vol.21 No.3

Text Mining of Biomedical Articles Using the Konstanz Information Miner (KNIME) Platform: Hemolytic Uremic Syndrome as a Case Study

Ricardo A. Dorr,Juan J. Casal,Roxana Toriano 대한의료정보학회 2022 Healthcare Informatics Research Vol.28 No.3

Objectives: Automated systems for information extraction are becoming very useful due to the enormous scale of the existingliterature and the increasing number of scientific articles published worldwide in the field of medicine. We aimed todevelop an accessible method using the open-source platform KNIME to perform text mining (TM) on indexed publications. Material from scientific publications in the field of life sciences was obtained and integrated by mining information onhemolytic uremic syndrome (HUS) as a case study. Methods: Text retrieved from Europe PubMed Central (PMC) was processedusing specific KNIME nodes. The results were presented in the form of tables or graphical representations. Data couldalso be compared with those from other sources. Results: By applying TM to the scientific literature on HUS as a case study,and by selecting various fields from scientific articles, it was possible to obtain a list of individual authors of publications,build bags of words and study their frequency and temporal use, discriminate topics (HUS vs. atypical HUS) in an unsupervisedmanner, and cross-reference information with a list of FDA-approved drugs. Conclusions: Following the instructionsin the tutorial, researchers without programming skills can successfully perform TM on the indexed scientific literature. Thismethodology, using KNIME, could become a useful tool for performing statistics, analyzing behaviors, following trends, andmaking forecast related to medical issues. The advantages of TM using KNIME include enabling the integration of scientificinformation, helping to carry out reviews, and optimizing the management of resources dedicated to basic and clinical research.

Measurement of Polyethylene Wear in Total Hip Arthroplasty - Accuracy Versus Ease of Use -

JoonSoonKang,SeungRimPark,EdwardEbramzadeh,LawrenceD.Dorr 연세대학교의과대학 2003 Yonsei medical journal Vol.44 No.3

An investigation of reaction progression through the catalyst bed inmethanol autothermal reformation

김형만,최갑승,윤형철,J. Lars Dorr,Paul A. Erickson 대한기계학회 2008 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.22 No.2

This study investigates autothermal reforming of fuel cell-grade methanol as a method for producing hydrogen for transportation applications. A previous study on the effects of oxygen-to-carbon ratio on ATR reactor performance showed that the optimum of O2/CH3OH=0.30 found in the experimental tests is 30% higher than the theoretical optimum of 0.23. In this study, the influence of catalyst bed length is investigated to give insight into the reaction progression through the catalyst bed in methanol autothermal reformation. The effect of reaction progression through the catalyst bed is experimentally investigated in relation to reactor output parameters of fuel conversion, temperature profile, and reactor efficiency. The results from this study serve as a baseline for future research of autothermal reforming of hydrocarbon fuels as a method for producing hydrogen.

An experimental study of methanol autothermal reformation as a method of producing hydrogen for transportation applications

Choi, Kap-Seung,Choi, In-Jae,Hwang, Se-joon,Kim, Hyung-Man,Dorr, J. Lars,Erickson, Paul A. Elsevier 2010 International journal of hydrogen energy Vol.35 No.12

<P><B>Abstract</B></P><P>This study investigates autothermal reforming (ATR) of methanol as a method of producing fuel cell-grade hydrogen for transportation applications. From the previous works in autothermal reformation, it is known that while the steam-to-carbon ratio (S/C) may somewhat affect the efficiency of ATR, the oxygen-to-methanol ratio (O<SUB>2</SUB>/CH<SUB>3</SUB>OH) is a more significant parameter in ATR of higher hydrocarbons. Methanol differs from higher hydrocarbons in that it is reformed at relatively low temperatures and, therefore, may respond to O<SUB>2</SUB>/CH<SUB>3</SUB>OH differently from higher hydrocarbons. According to the past studies, the optimum O<SUB>2</SUB>/CH<SUB>3</SUB>OH for ATR of methanol is equal to 0.23. However, this conclusion is based on models which utilize assumptions that are not necessarily accurate, such as complete fuel conversion and ideal reaction products. This study presents experimental data that shows how the ATR reactor efficiency varies with O<SUB>2</SUB>/CH<SUB>3</SUB>OH. The results from this study may serve as a baseline for future research of autothermal reforming of hydrocarbon fuels as a method of producing hydrogen in transportation applications.</P>

Simulation of an optimized technique based on DS-CDMA for simultaneous transmission of multichannel biosignals

Daniel Tchiotsop,Ade´laı¨de Nicole Kengnou Tele,Didier Wolf,Vale´rie Louis-Dorr 대한의용생체공학회 2017 Biomedical Engineering Letters (BMEL) Vol.7 No.2

Telemedicine is becoming increasingly, withapplications in many areas of healthcare, such as hometelecare of the elderly, diagnosis at a distance and roboticsurgery. The simultaneous transmission of several leads ofbiomedical signals should be considered in telemedicine,given the many benefits it brings. Code division multipleaccess (CDMA) is a multiple access technique that enablesusers to transmit independent information simultaneouslywithin the same bandwidth. The direct sequence CDMA(DS-CDMA) is a variant of the CDMA technique in whicha pseudorandom sequence having a higher bandwidth thanthe information signal is used to modulate the informationsignal directly. Biomedical signals are confidential; thus,their transmission must be secured. In this paper we proposea protocol similar to DS-CDMA for the simultaneoustransmission of all of the leads of some multichannelbiomedical signals. We assigned orthogonal codes to differentleads of a signal. The convolution of each lead withthe code gives a signal spread over a broad frequency band. All of the spread signals are then mixed to produce a singlecomposite signal. This composite signal is frequencymodulated, amplified and transmitted. At the reception,inverse functions to the previous are developed to performdemodulation, demultiplexing and extraction of the physiologicalsignals transmitted. We used the discrete Walshfunctions as codes. The results obtained are satisfactory,even in situations where the noise disturbances aresignificant.

In situ observation of atomic movement in a ferroelectric film under an external electric field and stress

Lee, Hyeon Jun,Guo, Er-Jia,Min, Taewon,Hwang, Seung Hyun,Lee, Su Yong,Dorr, Kathrin,Lee, Jaekwang,Jo, Ji Young Tsinghua Press, co-published with Springer-Verlag 2018 NANO RESEARCH Vol.11 No.7

<P>Atomic movement under application of external stimuli (i.e., electric field or mechanical stress) in oxide materials has not been observed due to a lack of experimental methods but has been well known to determine the electric polarization. Here, we investigated atomic movement arising from the ferroelectric response of BiFeO3 thin films under the effect of an electric field and stress in real time using a combination of switching spectroscopy, time-resolved X-ray microdiffraction, and in situ stress engineering. Under an electric field applied to a BiFeO3 film, the hysteresis loop of the reflected X-ray intensity was found to result from the opposing directions of displaced atoms between the up and down polarization states. An additional shift of atoms arising from the linearly increased dielectric component of the polarization in BiFeO3 was confirmed through gradual reduction of the diffracted X-ray intensity. The electric-field-induced displacement of oxygen atoms was found to be larger than that of Fe atom for both ferroelectric switching and increase of the polarization. The effect of external stress on the BiFeO3 thin film, which was controlled by applying an electric field to the highly piezoelectric substrate, showed smaller atomic shifts than for the case of applying an electric field to the film, despite the similar tetragonality.</P>

Dynamics of kinetic geodesic-acoustic modes and the radial electric field in tokamak neoclassical plasmas

Xu, X.Q.,Belli, E.,Bodi, K.,Candy, J.,Chang, C.S.,Cohen, R.H.,Colella, P.,Dimits, A.M.,Dorr, M.R.,Gao, Z.,Hittinger, J.A.,Ko, S.,Krasheninnikov, S.,McKee, G.R.,Nevins, W.M.,Rognlien, T.D.,Snyder, P.B. International Atomic Energy Agency 2009 Nuclear fusion Vol.49 No.6

<P>We present edge gyrokinetic simulations of tokamak plasmas using the fully non-linear (full-<I>f</I>) continuum code TEMPEST. A non-linear Boltzmann model is used for the electrons. The electric field is obtained by solving the 2D gyrokinetic Poisson equation. We demonstrate the following. (1) High harmonic resonances (<I>n</I> > 2) significantly enhance geodesic-acoustic mode (GAM) damping at high <I>q</I> (tokamak safety factor), and are necessary to explain the damping observed in our TEMPEST <I>q</I>-scans and consistent with the experimental measurements of the scaling of the GAM amplitude with edge <I>q</I><SUB>95</SUB> in the absence of obvious evidence that there is a strong <I>q</I>-dependence of the turbulent drive and damping of the GAM. (2) The kinetic GAM exists in the edge for steep density and temperature gradients in the form of outgoing waves, its radial scale is set by the ion temperature profile, and ion temperature inhomogeneity is necessary for GAM radial propagation. (3) The development of the neoclassical electric field evolves through different phases of relaxation, including GAMs, their radial propagation and their long-time collisional decay. (4) Natural consequences of orbits in the pedestal and scrape-off layer region in divertor geometry are substantial non-Maxwellian ion distributions and parallel flow characteristics qualitatively like those observed in experiments.</P>