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1. Evolution of density perturbations in a cylindrical molecular cloud using smoothed particle hydrodynamics

Author

Nejad-Asghar M. and Soltani J.

Subjects
ISM: clouds, evolution, ISM: magnetic fields, Stars: formation, Methods: numerical, Astronomy, QB1-991
Abstract

Molecular clouds have a hierarchical structure from few tens of parsecs for giants to few tenth of a parsec for proto-stellar cores. Nowadays, our observational techniques are so advanced that it has become possible to detect the small-scale substructures inside the molecular cores. The question that arises is how these small condensations are formed. In the present research, we study the effect of ambipolar diffusion heating on the ubiquitous perturbations in a molecular cloud and investigate the possibility of converting them to dense substructures. For this purpose, a small azimuthal perturbation is implemented on the density of an axisymmetric two-dimensional cylindrical cloud, and its evolution is simulated by the technique of two-fluid smoothed particle hydrodynamics. The self-gravity is not included and the initial state has uniform density, temperature and magnetic field, parallel to the axis of cylinder. In addition, all perturbed quantities are assumed to depend only on azimuth angle and time. Computer experiments show that if the ambipolar diffusion heating is ignored, the perturbation will be dispersed over the time. Including the heating due to ambipolar diffusion heats the matter in regions adjacent to the perturbation, thus, leading to the transfer of matter into the perturbed area. In this case, the density of perturbations can be increased. Also, the results of simulations show that an increase of the initial magnetic pressure leads to the intensification of difference between density of perturbations and their surroundings (i.e. increasing of density contrast). This effect is due to the direct relationship of the drift velocity to the intensity of the magnetic field and its gradient. Simulations with different initial uniform densities show that the growth of relative density contrast is more clear with a special density. This result can be explained by the intensification of thermal instability in this special density.

Published
2009
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8. Artificial viscosity in simulation of shock waves by smoothed particle hydrodynamics

Author

Nejad-Asghar, M., Khesali, A. R., and Soltani, J.

Subjects
Astrophysics
Abstract

The artificial viscosity is reconsidered in smoothed particle hydrodynamics to prevent inter-particle penetration, unwanted heating, and unphysical solutions. The coefficients in the Monaghan's standard artificial viscosity are considered as time variable, and a restriction on them is proposed such that avoiding the undesired effects in the subsonic regions. The shock formation in adiabatic and isothermal cases are used to study the ability of this modified artificial viscosity recipe. The computer experiments show that the proposal appears to work and the accuracy of this restriction is acceptable., Comment: This manuscript has been accepted by Ap&SS

Published
2007
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21. Adaptive input-output feedback-linearization-based torque control of synchronous reluctance motor without mechanical sensor

Author

Abootorabi Zarchi, H., Soltani, J., and Arab Markadeh, G.

Subjects
Alternating current electric motors -- Design and construction, Feedback control systems -- Usage, Linearization (Electronics) -- Analysis, Reluctance motors -- Design and construction, Reluctance motors -- Testing, Business, Computers, Electronics, Electronics and electrical industries
Published
2010

24. The worldwide Antibiotic Resistance and Prescribing in European Children (ARPEC) point prevalence survey: developing hospital-quality indicators of antibiotic prescribing for children

Author

Versporten A1, Bielicki J2, Drapier N1, Sharland M2, Goossens H3, ARPEC project group. Calle GM, Garrahan JP, Clark J, Cooper C, Blyth CC, Francis JR, Alsalman J, Jansens H, Mahieu L, Van Rossom P, Vandewal W, Lepage P, Blumental S, Briquet C, Robbrecht D, Maton P, Gabriels P, Rubic Z, Kovacevic T, Nielsen JP, Petersen JR, Poorisrisak P, Jensen LH, Laan M, Tamm E, Matsinen M, Rummukainen ML, Gajdos V, Olivier R, Le Maréchal F, Martinot A, Dubos F, Lagrée M, Prot-Labarthe S, Lorrot M, Orbach D, Pagava K, Hufnagel M, Knuf M, Schlag SA, Liese J, Renner L, Enimil A, Awunyo M, Syridou G, Spyridis N, Critselis E, Kouni S, Mougkou K, Ladomenou F, Gkentzi D, Iosifidis E, Roilides E, Sahu S, Murki S, Malviya M, Kalavalapalli DB, Singh S, Singhal T, Garg G, Garg P, Kler N, Soltani J, Jafarpour Z, Pouladfar G, Nicolini G, Montagnani C, Galli L, Esposito S, Tenconi R, Lo Vecchio A, Dona' D, Giaquinto C, Borgia E, D'Argenio P, De Luca M, Centenari C, Raka L, Raka D, Omar A, Al-Mousa H, Mozgis D, Sviestina I, Burokiene S, Usonis V, Tavchioska G, Hargadon-Lowe A, Zarb P, Borg MA, González Lozano CA, Zárate Castañon P, Cancino ME, McCullagh B, McCorry A, Gormley C, Al Maskari Z, Al-Jardani A, Pluta M, Rodrigues F, Brett A, Esteves I, Marques L, Ali AlAjmi J, Claudia Cambrea S, Rashed AN, Mubarak Al Azmi AA, Chan SM, Isa MS, Najdenov P, Čižman M, Unuk S, Finlayson H, Dramowski A, Maté-Cano I, Soto B, Calvo C, Santiago B, Saavedra-Lozano J, Bustinza A, Escosa-García L, Ureta N, Lopez-Varela E, Rojo P, Tagarro A, Barrero PT, Rincon-Lopez EM, Abubakar I, Aston J, Heginbothom M, Satodia P, Garbash M, Johnson A, Sharpe D, Barton C, Menson E, Arenas-Lopez S, Luck S, Doerholt K, McMaster P, Caldwell NA, Lunn A, Drysdale SB, Howe R, Scorrer T, Gahleitner F, Gupta R, Nash C, Alexander J, Raman M, Bell E, Rajagopal V, Kohlhoff S, Cox E, Zaoutis T., Mahieu, Ludo, ARPEC Project Grp, ARPEC project group, Versporten, A1, Bielicki, J2, Drapier, N1, Sharland, M2, Goossens, H3, ARPEC project group., Calle GM, Garrahan, Jp, Clark, J, Cooper, C, Blyth, Cc, Francis, Jr, Alsalman, J, Jansens, H, Mahieu, L, Van Rossom, P, Vandewal, W, Lepage, P, Blumental, S, Briquet, C, Robbrecht, D, Maton, P, Gabriels, P, Rubic, Z, Kovacevic, T, Nielsen, Jp, Petersen, Jr, Poorisrisak, P, Jensen, Lh, Laan, M, Tamm, E, Matsinen, M, Rummukainen, Ml, Gajdos, V, Olivier, R, Le Maréchal, F, Martinot, A, Dubos, F, Lagrée, M, Prot-Labarthe, S, Lorrot, M, Orbach, D, Pagava, K, Hufnagel, M, Knuf, M, Schlag, Sa, Liese, J, Renner, L, Enimil, A, Awunyo, M, Syridou, G, Spyridis, N, Critselis, E, Kouni, S, Mougkou, K, Ladomenou, F, Gkentzi, D, Iosifidis, E, Roilides, E, Sahu, S, Murki, S, Malviya, M, Kalavalapalli, Db, Singh, S, Singhal, T, Garg, G, Garg, P, Kler, N, Soltani, J, Jafarpour, Z, Pouladfar, G, Nicolini, G, Montagnani, C, Galli, L, Esposito, S, Tenconi, R, Lo Vecchio, A, Dona', D, Giaquinto, C, Borgia, E, D'Argenio, P, De Luca, M, Centenari, C, Raka, L, Raka, D, Omar, A, Al-Mousa, H, Mozgis, D, Sviestina, I, Burokiene, S, Usonis, V, Tavchioska, G, Hargadon-Lowe, A, Zarb, P, Borg, Ma, González Lozano, Ca, Zárate Castañon, P, Cancino, Me, Mccullagh, B, Mccorry, A, Gormley, C, Al Maskari, Z, Al-Jardani, A, Pluta, M, Rodrigues, F, Brett, A, Esteves, I, Marques, L, Ali AlAjmi, J, Claudia Cambrea, S, Rashed, An, Mubarak Al Azmi, Aa, Chan, Sm, Isa, M, Najdenov, P, Čižman, M, Unuk, S, Finlayson, H, Dramowski, A, Maté-Cano, I, Soto, B, Calvo, C, Santiago, B, Saavedra-Lozano, J, Bustinza, A, Escosa-García, L, Ureta, N, Lopez-Varela, E, Rojo, P, Tagarro, A, Barrero, Pt, Rincon-Lopez, Em, Abubakar, I, Aston, J, Heginbothom, M, Satodia, P, Garbash, M, Johnson, A, Sharpe, D, Barton, C, Menson, E, Arenas-Lopez, S, Luck, S, Doerholt, K, Mcmaster, P, Caldwell, Na, Lunn, A, Drysdale, Sb, Howe, R, Scorrer, T, Gahleitner, F, Gupta, R, Nash, C, Alexander, J, Raman, M, Bell, E, Rajagopal, V, Kohlhoff, S, Cox, E, and Zaoutis, T.

Subjects
0301 basic medicine, Male, Pediatrics, Latin Americans, Cross-sectional study, Prevalence, Psychological intervention, Drug resistance, Global Health, infectious diseases, 0302 clinical medicine, Global health, Medicine, 030212 general & internal medicine, Child, antibiotics, children, Drugs -- Prescribing, Pharmacology. Therapy, Hospitals -- Europe, Drug Resistance, Microbial, Hospitals, Anti-Bacterial Agents, Europe, Child, Preschool, Anti-infective agents, Female, medicine.drug, Microbiology (medical), medicine.medical_specialty, Cefepime, 030106 microbiology, Drug Prescriptions, 03 medical and health sciences, Surgical prophylaxis, pharmacology, pharmacology (medical), Environmental health, Humans, Biology, Quality Indicators, Health Care, business.industry, Health status indicators -- Europe, Infant, Drug Utilization, Cross-Sectional Studies, Health Care Surveys, Human medicine, business
Abstract

Objectives: Previously, web-based tools for cross-sectional antimicrobial point prevalence surveys (PPSs) have been used in adults to develop indicators of quality improvement. We aimed to determine the feasibility of developing similar quality indicators of improved antimicrobial prescribing focusing specifically on hospitalized neonates and children worldwide. Methods: A standardized antimicrobial PPS method was employed. Included were all inpatient children and neonates receiving an antimicrobial at 8:00 am on the day of the PPS. Denominators included the total number of inpatients. A web-based application was used for data entry, validation and reporting. We analysed 2012 data from 226 hospitals (H) in 41 countries (C) from Europe (174H; 24C), Africa (6H; 4C), Asia (25H; 8C), Australia (6H), Latin America (11H; 3C) and North America (4H). Results: Of 17693 admissions, 6499 (36.7%) inpatients received at least one antimicrobial, but this varied considerably between wards and regions. Potential indicators included very high broad-spectrum antibiotic prescribing in children of mainly ceftriaxone (ranked first in Eastern Europe, 31.3%; Asia, 13.0%; Southern Europe, 9.8%), cefepime (ranked third in North America, 7.8%) and meropenem (ranked first in Latin America, 13.1%). The survey identified worryingly high use of critically important antibiotics for hospital-acquired infections in neonates (34.9%; range from 14.2% in Africa to 68.0% in Latin America) compared with children (28.3%; range from 14.5% in Africa to 48.9% in Latin America). Parenteral administration was very common among children in Asia (88%), Latin America (81%) and Europe (67%). Documentation of the reasons for antibiotic prescribing was lowest in Latin America (52%). Prolonged surgical prophylaxis rates ranged from 78% (Europe) to 84% (Latin America). Conclusions: Simple web-based PPS tools provide a feasible method to identify areas for improvement of antibiotic use, to set benchmarks and to monitor future interventions in hospitalized neonates and children. To our knowledge, this study has derived the first global quality indicators for antibiotic use in hospitalized neonates and children., peer-reviewed

Published
2018

25. Soft photon production in 450 GeV/cp-Be collisions

Author

Antos, J., Beker, H., Brons, S., Bussmann, K., Dagan, S., Drees, A., Erd, C., Esten, M. J., Fabjan, C. W., Glässel, P., Goerlach, U., Hedberg, V., Lissauer, D., Mazzoni, M. A., McCubbin, N. A., Neubert, M., Nevski, P., Olsen, L., Pfeiffer, A., Ray, A., Schukraft, J., Shapira, D., Soltani, J., Specht, H. J., Stumer, I., Thompson, J., Veenhof, R. J., Willis, W. J., and Woody, C.

Published
1993
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26. Proton distributions in the target fragmentation region in proton-nucleus and nucleus-nucleus collisions at high energies

Author

Åkesson, T., Almehed, S., Angelis, A. L. S., Armenise, N., Atherton, H., Aubry, P., Bartels, H. W., Beaudoin, G., Beaulieu, J. M., Beker, H., Benary, O., Bettoni, D., Bisi, V., Blevis, I., Bøggild, H., Cleland, W., Clemen, M., Collick, B., Corriveau, F., Dagan, S., Dederichs, K., Dell'Uomo, S., Depommier, P., Devenish, R. C. E., Di Liberto, S., DiGiacomo, N., Dodd, J. R., Dolgoshein, B., Drees, A., En'yo, H., Erlandsson, B., Esten, M. J., Fabjan, C. W., Fischer, P., Fraenkel, Z., Gaidot, A., Gibrat-Debu, F., Giubellino, P., Glässel, P., Goerlach, U., Haglund, R., Hamel, L. A., van Hecke, H., Hedberg, V., Heifetz, R., Hölscher, A., Jacak, B., Jarlskog, G., Johansson, S., Kraner, H., Kroh, V., Lamarche, F., Leroy, C., Lissauer, D., London, G., Lörstad, B., Lounis, A., Martelli, F., Masera, M., Marzari-Chiesa, A., Mazzoni, M. A., Mazzucato, E., McCubbin, M. L., McCubbin, N. A., McGaughey, P., Meddi, F., Mjörnmark, U., Muciaccia, M. T., Muraviev, S., Murray, M., Neubert, M., Nilsson, S., Olsen, L., Oren, Y., Pansart, J. P., Park, Y. M., Pfeiffer, A., Piuz, F., Polychronakos, V., Poulard, G., Price, M., Rahm, D., Ramello, L., Riccati, L., Romano, G., Rosa, G., Sandor, L., Schukraft, J., Sekimoto, M., Sellden, B., Seman, M., Shmeleva, A., Sidorov, V., Simone, S., Sirois, Y., Sletten, H., Smirnov, S., Soltani, J., Sondheim, W., Specht, H. J., Stern, E., Stumer, I., Sunier, J., Tcherniatin, V., Thodberg, H. H., Thompson, J., Tikhomirov, V., Tserruya, I., Vasseur, G., Veenhof, R., Wigmans, R., Yepes, P., and HELIOS Collaboration

Published
1992
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27. Inclusive photon production in pA and AA collisions at 200 GeV/u

Author

Åkesson, T., Almehed, S., Angelis, A. L. S., Armenise, N., Atherton, H., Aubry, P., Bartels, H. W., Beaudoin, G., Beaulieu, J. M., Beker, H., Benary, O., Bettoni, D., Bisi, V., Blevis, I., Bøggild, H., Cleland, W., Clemen, M., Collick, B., Corriveau, F., Dagan, S., Dederichs, K., Dell'Uomo, S., Depommier, P., Devenish, R. C. E., Di Liberto, S., DiGiacomo, N., Dodd, J. R., Dogolshein, B., Drees, A., En'yo, H., Erlandsson, B., Esten, M. J., Fabjan, C. W., Fischer, P., Fraenkel, Z., Gaidot, A., Gibrat-Debu, F., Giubellino, P., Glässel, P., Goerlach, U., Haglund, R., Hamel, L. A., van Hecke, H., Hedberg, V., Heifetz, R., Hölscher, A., Jacak, B., Jarlskog, G., Johansson, S., Kraner, H., Kroth, V., Lamarche, F., Leroy, C., Lissauer, D., London, G., Lörstad, B., Lounis, A., Martelli, F., Marzari-Chiesa, A., Masera, M., Mazzoni, M. A., Mazzucato, E., McCubbin, M. L., McCubbin, N. A., McGaughey, P., Meddi, F., Mjörnmark, U., Muciaccia, M. T., Muraviev, S., Murray, M., Neubert, M., Nilsson, S., Olsen, L., Oren, Y., Pansart, J. P., Park, Y. M., Pfeiffer, A., Piuz, F., Polychronakos, V., Poulard, G., Price, M., Rahm, D., Ramello, L., Riccati, L., Romano, G., Rosa, G., Sandor, L., Schukraft, J., Sekimoto, M., Sellden, B., Seman, M., Shmeleva, A., Sidoroy, V., Simone, S., Sirois, Y., Sletten, H., Smirnov, S., Soltani, J., Sondheim, W., Specht, H. J., Stumer, I., Sunier, J., Toherniatin, V., Thodberg, H. H., Thompson, J., Tikhomirov, V., Tserruya, I., Vasseur, G., Veenhoff, R., Wigmans, R., Yepes, P., and HELIOS Collaboration

Published
1990
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28. Inclusive negative particlep ⊥ spectra in p-nucleus and nucleus-nucleus collisions at 200 GeV per nucleon

Author

Åkesson, T., Almehed, S., Angelis, A. L. S., Armenise, N., Atherton, H., Aubry, P., Bartels, H. W., Beaudoin, G., Beaulieu, J. M., Beker, H., Benary, O., Bettoni, D., Bisi, V., Blevis, I., Bøggild, H., Cleland, W., Clemen, M., Collick, B., Corriveau, F., Dagan, S., Dederichs, K., Dell'Uomo, S., Depommier, P., Devenish, R. C. E., Di Liberto, S., Di Giacomo, N., Dodd, J. R., Dogolshein, B., Drees, A., En'yo, H., Erlandsson, B., Esten, M. J., Fabjan, C. W., Fischer, P., Fraenkel, Z., Gaidot, A., Gibrat-Debu, F., Giubellino, P., Glässel, P., Goerlach, U., Haglund, R., Hamel, L. A., van Hecke, H., Hedberg, V., Heifetz, R., Hölscher, A., Jacak, B., Jarlskog, G., Johansson, S., Kraner, H., Kroh, V., Lamarche, F., Leroy, C., Lissauer, D., London, G., Lörstad, B., Lounis, A., Martelli, F., Marzari-Chiesa, A., Masera, M., Mazzoni, M. A., Mazzucato, E., McCubbin, M. L., McCubbin, N. A., McGaughey, P., Meddi, F., Mjörnmark, U., Muciaccia, M. T., Muraviev, S., Murray, M., Neubert, M., Nilsson, S., Olsen, L., Oren, Y., Pansart, J. P., Park, Y. M., Pfeiffer, A., Piuz, F., Polychronakos, V., Poulard, G., Prioe, M., Rahm, D., Ramello, I., Riccati, I., Romano, G., Rosa, G., Sandor, L., Schukraft, J., Sekimoto, M., Sellden, B., Seman, M., Shmeleva, A., Sidorov, V., Simone, S., Sirois, Y., Sletten, H., Smirnov, S., Soltani, J., Sondheim, W., Specht, H. J., Stumer, I., Sunier, S., Tcherniatin, V., Thodberg, H. H., Thompson, J., Tikhomirov, V., Tserruya, I., Vasseur, G., Veenhof, R., Wigmans, R., Yepes, P., and HELIOS Collaboration

Published
1990
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29. Antifungal susceptibility testing of Candida species isolated from the immunocompromised patients admitted to ten university hospitals in Iran

Author

Badiee, P., Badali, H., Boekhout, T., Diba, K., Moghadam, A.G., Hossaini Nasab, A., Jafarian, H., Mohammadi, R., Mirhendi, H., Najafzadeh, M.J., Shamsizadeh, A., Soltani, J., and Evolutionary and Population Biology (IBED, FNWI)

Subjects
bacterial infections and mycoses
Abstract

Background Antifungal susceptibility testing is a subject of interest in the field of medical mycology. The aim of the present study were the distributions and antifungal susceptibility patterns of various Candida species isolated from colonized and infected immunocompromised patients admitted to ten university hospitals in Iran. Methods In totally, 846 Candida species were isolated from more than 4000 clinical samples and identified by the API 20 C AUX system. Antifungal susceptibility testing was performed by broth microdilution method according to CLSI. Results The most frequent Candida species isolated from all patients was Candida albicans (510/846). The epidemiological cutoff value and percentage of wild-type species for amphotericin B and fluconazole in Candida albicans, Candida tropicalis, Candida glabrata and Candida krusei were 0.5 μg/ml (95%) and 4 μg/ml (96%); 1 μg/ml (95%) and 8 μg/ml (95%); 0.5 μg/ml (99%) and 19 μg/ml (98%); and 4 μg/ml (95%) and 64 μg/ml (95%), respectively. The MIC90 and epidemiological cutoff values to posaconazole in Candida krusei were 0.5 μg/ml. There were significant differences between infecting and colonizing isolates of Candida tropicalis in MIC 90 values of amphotericin B, and isolates of Candida glabrata in values of amphotericin B, caspofungin, and voriconazole (P

Published
2017

30. Breastfeeding and Helicobacter pylori Infection in Early Childhood: a Continuing Dilemma

Author

Soltani, J., Nikkhoo, B., Khormehr, J., Ataee, P., Hakhamaneshi, M. -S, and fardin gharibi

Subjects
Human Milk, Risk Factors, Original Article, Iran, Children, Helicobacter Pylori
Abstract

Objective: Helicobacter pylori (H. pylori) is the most common chronic bacterial infection in humans. Chronic colonization increases the risk of duodenal ulcer and gastric cancer. The risk factors for acquiring the infection have been extensively studied. However, there are conflicting results on the role of breastfeeding in the prevention of H. pylori infection. We conducted a study to evaluate the effects of breastfeeding on the H. Pylori infection in Kurdish children in Sanandaj, IR Iran. Methods: A historical cohort study was carried out from January 2011 through December 2012. Totally 221 children who were going to attain 2 years old during the study period were randomly enrolled. They were divided into two groups, i.e. breastfed and non-breastfed. We used H. pylori stool antigen test to detect infection in the selected group of children after age of 2 years and cessation of breastfeeding. Each group was subdivided into two subgroups, infected and non-infected. The associations of breastfeeding with H. pylori infection was assessed using statistical software. Findings: We found no difference in the odds of infection between breastfed and non-breastfed groups (OR=0.809, 95% CI [0.453–1.444]). An association between age and the prevalence of infection was found (P=0.008). There was an increase in the odds of infection as the family size grew (OR=1.93, 95% CI [1.04–3.6]) as well as increasing housing density (OR=2.12, 95% CI [1.10–4.10]). Conclusion: The data suggests that breastfeeding in infancy does not protect against H. pylori infection for long duration among studied children in Iran. The protective effects of breastfeeding, if any, are at most transient.

Published
2014

33. The worldwide antibiotic resistance and prescribing in european children (ARPEC) point prevalence survey: Developing hospital-quality indicators of antibiotic prescribing for children

Author

Versporten, A. Bielicki, J. Drapier, N. Sharland, M. Goossens, H. Calle, G.M. Clark, J. Cooper, C. Blyth, C.C. Francis, J.R. Alsalman, J. Jansens, H. Mahieu, L. Van Rossom, P. Vandewal, W. Lepage, P. Blumental, S. Briquet, C. Robbrecht, D. Maton, P. Gabriels, P. Rubic, Z. Kovacevic, T. Nielsen, J.P. Petersen, J.R. Poorisrisak, P. Jensen, L.H. Laan, M. Tamm, E. Matsinen, M. Rummukainen, M.-L. Gajdos, V. Olivier, R. Le Maréchal, F. Martinot, A. Prot-Labarthe, S. Lorrot, M. Orbach, D. Pagava, K. Hufnagel, M. Knuf, M. Schlag, S.A.A. Liese, J. Renner, L. Enimil, A. Awunyo, M. Syridou, G. Spyridis, N. Critselis, E. Kouni, S. Mougkou, K. Ladomenou, F. Gkentzi, D. Iosifidis, E. Roilides, E. Sahu, S. Murki, S. Malviya, M. Kalavalapalli, D.B. Singh, S. Singhal, T. Garg, G. Garg, P. Kler, N. Soltani, J. Jafarpour, Z. Pouladfar, G. Nicolini, G. Montagnani, C. Galli, L. Esposito, S. Vecchio, A.L. Dona', D. Giaquinto, C. Borgia, E. D'Argenio, P. De Luca, M. Centenari, C. Raka, L. Omar, A. Al-Mousa, H. Mozgis, D. Sviestina, I. Burokiene, S. Usonis, V. Tavchioska, G. Hargadon-Lowe, A. Zarb, P. Borg, M.A. González Lozano, C.A. Castañon, P.Z. Cancino, M.E. McCullagh, B. McCorry, A. Gormley, C. Al Maskari, Z. Al-Jardani, A. Pluta, M. Rodrigues, F. Brett, A. Esteves, I. Marques, L. AlAjmi, J.A. Cambrea, S.C. Rashed, A.N. Al Azmi, A.A.M. Chan, S.M. Isa, M.S. Najdenov, P. Čižman, M. Unuk, S. Finlayson, H. Dramowski, A. Maté-Cano, I. Soto, B. Calvo, C. Santiago, B. Saavedra-Lozano, J. Bustinza, A. Escosa-García, L. Ureta, N. Tagarro, A. Barrero, P.T. Rincon-Lopez, E.M. Abubakar, I. Aston, J. Heginbothom, M. Satodia, P. Garbash, M. Johnson, A. Sharpe, D. Barton, C. Menson, E. Arenas-Lopez, S. Luck, S. Doerholt, K. McMaster, P. Caldwell, N.A. Lunn, A. Drysdale, S.B. Howe, R. Scorrer, T. Gahleitner, F. Gupta, R. Nash, C. Alexander, J. Raman, M. Bell, E. Rajagopal, V. Kohlhoff, S. Cox, E. Zaoutis, T. ARPEC project group

Abstract

Objectives: Previously, web-based tools for cross-sectional antimicrobial point prevalence surveys (PPSs) have been used in adults to develop indicators of quality improvement. We aimed to determine the feasibility of developing similar quality indicators of improved antimicrobial prescribing focusing specifically on hospitalized neonates and children worldwide. Methods: A standardized antimicrobial PPS method was employed. Included were all inpatient children and neonates receiving an antimicrobial at 8:00 am on the day of the PPS. Denominators included the total number of inpatients. A web-based application was used for data entry, validation and reporting. We analysed 2012 data from 226 hospitals (H) in 41 countries (C) from Europe (174H; 24C), Africa (6H; 4C), Asia (25H; 8C), Australia (6H), Latin America (11H; 3C) and North America (4H). Results: Of 17 693 admissions, 6499 (36.7%) inpatients received at least one antimicrobial, but this varied considerably between wards and regions. Potential indicators included very high broad-spectrum antibiotic prescribing in children of mainly ceftriaxone (ranked first in Eastern Europe, 31.3%; Asia, 13.0%; Southern Europe, 9.8%), cefepime (ranked third in North America, 7.8%) and meropenem (ranked first in Latin America, 13.1%). The survey identified worryingly high use of critically important antibiotics for hospital-acquired infections in neonates (34.9%; range from 14.2% in Africa to 68.0% in Latin America) compared with children (28.3%; range from 14.5% in Africa to 48.9% in Latin America). Parenteral administration was very common among children in Asia (88%), Latin America (81%) and Europe (67%). Documentation of the reasons for antibiotic prescribing was lowest in Latin America (52%). Prolonged surgical prophylaxis rates ranged from 78% (Europe) to 84% (Latin America). Conclusions: Simple web-based PPS tools provide a feasible method to identify areas for improvement of antibiotic use, to set benchmarks and to monitor future interventions in hospitalized neonates and children. To our knowledge, this study has derived the first global quality indicators for antibiotic use in hospitalized neonates and children. © The Author 2016. Published by Oxford University Press on behalf of the British Society for Antimicrobial Chemotherapy. All rights reserved.

Published
2016

34. Nosocomial Infections: Multicenter surveillance of antimicrobial resistance profile of Staphylococcus aureus and Gram negative rods isolated from blood and other sterile body fluids in Iran

Author

Poorabbas B, Mardaneh J, Rezaei Z, Kalani M, Gholamreza Pouladfar, Mh, Alami, Soltani J, Shamsi-Zadeh A, Abdoli-Oskooi S, Mj, Saffar, and Alborzi A

Subjects
Sterile body fluids, Staphylococcus aureus, Blood, lcsh:QR1-502, Original Article, Iran, Antimicrobial resistance, Gram negative bacteria, lcsh:Microbiology
Abstract

Background and Objective: Antibiotic resistance is increasing, especially in healthcare-associated infections causing significant public health concerns worldwide. National information is required to make appropriate policies, update list of essential drugs for treatment, and evaluate the effects of intervention strategies. A nationwide surveillance of antimicrobial resistant bacteria in nosocomial infections was established in Iran in 2008, so that the data obtained through the surveillance would enable us to construct a database. Materials and Methods: Seven major teaching hospitals in Shiraz, Tabriz, Sari, Mashhad, Sanandaj, Ahwaz and Isfahan participated in this study. A total of 858 strains isolated from blood and other sterile body fluids were tested. Identification at the species level was performed with conventional biochemical methods and the API system. Susceptibility tests were done using disk diffusion method. The methicillin-resistance in S. aureus (MRSA) was determined by the oxacillin agar screen plate and respective MIC values were assessed using the E-test strips. The confirmatory disk diffusion methods were applied for phenotypic identification of extended-spectrum β- lactamase (ESBL) production for E. coli and K. pneumoniae, according to CLSI guidelines. Results: Cultivation and re-identification of the strains yielded 858 isolates, consisting of 224 S. aureus, 148 Klebsiella spp., 105 Serratia spp., 146 E. coli, 67 Acinetobacter spp., 38 Enterobacter spp., 95 Pseudomonas spp., 71 P.aeruginosa. 35 Stenotrophomonas sp., and 8 other organisms. MRSA was detected in 37.5% of the isolates. No vancomycin-resistant or vancomycin-intermediate resistant S. aureus was detected. With the exception of Acinetobacter and Stenotrophomonas, 85% of the Gram-negative isolates were found to be susceptible in vitro to imipenem. Overall, about 61% of K. pneumoniae and 35% of E. coli isolates were ESBL producing. Conclusion: Multidrug resistant isolates of Gram-negative organisms and methicillin-resistant strains of S. aureus have been detected in many hospitals in this study.

Published
2015

35. The worldwide antibiotic resistance and prescribing in european children (ARPEC) point prevalence survey: Developing hospital-quality indicators of antibiotic prescribing for children.

Author

Soltani J., Kovacevic T., Nielsen J.P., Petersen J.R., Poorisrisak P., Jensen L.H., Laan M., Tamm E., Matsinen M., Rummukainen M.-L., Gajdos V., Olivier R., Le Marechal F., Martinot A., Prot-Labarthe S., Lorrot M., Orbach D., Pagava K., Hufnagel M., Knuf M., Schlag S.A.A., Liese J., Renner L., Enimil A., Awunyo M., Syridou G., Spyridis N., Critselis E., Kouni S., Mougkou K., Ladomenou F., Gkentzi D., Iosifidis E., Roilides E., Sahu S., Murki S., Malviya M., Kalavalapalli D.B., Singh S., Singhal T., Garg G., Garg P., Kler N., Jafarpour Z., Pouladfar G., Nicolini G., Montagnani C., Galli L., Esposito S., Vecchio A.L., Dona' D., Giaquinto C., Borgia E., D'Argenio P., De Luca M., Centenari C., Raka L., Omar A., Al-Mousa H., Mozgis D., Sviestina I., Burokiene S., Usonis V., Tavchioska G., Hargadon-Lowe A., Zarb P., Borg M.A., Gonzalez Lozano C.A., Castanon P.Z., Cancino M.E., McCullagh B., McCorry A., Gormley C., Al Maskari Z., Al-Jardani A., Pluta M., Rodrigues F., Brett A., Esteves I., Marques L., AlAjmi J.A., Cambrea S.C., Rashed A.N., Al Azmi A.A.M., Chan S.M., Isa M.S., Najdenov P., Cizman M., Unuk S., Finlayson H., Dramowski A., Mate-Cano I., Soto B., Calvo C., Santiago B., Saavedra-Lozano J., Bustinza A., Escosa-Garcia L., Ureta N., Tagarro A., Barrero P.T., Rincon-Lopez E.M., Abubakar I., Aston J., Heginbothom M., Satodia P., Garbash M., Johnson A., Sharpe D., Barton C., Menson E., Arenas-Lopez S., Luck S., Doerholt K., McMaster P., Caldwell N.A., Lunn A., Drysdale S.B., Howe R., Scorrer T., Gahleitner F., Gupta R., Nash C., Alexander J., Raman M., Bell E., Rajagopal V., Kohlhoff S., Cox E., Zaoutis T., Versporten A., Bielicki J., Drapier N., Sharland M., Goossens H., Calle G.M., Clark J., Cooper C., Blyth C.C., Francis J.R., Alsalman J., Jansens H., Mahieu L., Van Rossom P., Vandewal W., Lepage P., Blumental S., Briquet C., Robbrecht D., Maton P., Gabriels P., Rubic Z., Soltani J., Kovacevic T., Nielsen J.P., Petersen J.R., Poorisrisak P., Jensen L.H., Laan M., Tamm E., Matsinen M., Rummukainen M.-L., Gajdos V., Olivier R., Le Marechal F., Martinot A., Prot-Labarthe S., Lorrot M., Orbach D., Pagava K., Hufnagel M., Knuf M., Schlag S.A.A., Liese J., Renner L., Enimil A., Awunyo M., Syridou G., Spyridis N., Critselis E., Kouni S., Mougkou K., Ladomenou F., Gkentzi D., Iosifidis E., Roilides E., Sahu S., Murki S., Malviya M., Kalavalapalli D.B., Singh S., Singhal T., Garg G., Garg P., Kler N., Jafarpour Z., Pouladfar G., Nicolini G., Montagnani C., Galli L., Esposito S., Vecchio A.L., Dona' D., Giaquinto C., Borgia E., D'Argenio P., De Luca M., Centenari C., Raka L., Omar A., Al-Mousa H., Mozgis D., Sviestina I., Burokiene S., Usonis V., Tavchioska G., Hargadon-Lowe A., Zarb P., Borg M.A., Gonzalez Lozano C.A., Castanon P.Z., Cancino M.E., McCullagh B., McCorry A., Gormley C., Al Maskari Z., Al-Jardani A., Pluta M., Rodrigues F., Brett A., Esteves I., Marques L., AlAjmi J.A., Cambrea S.C., Rashed A.N., Al Azmi A.A.M., Chan S.M., Isa M.S., Najdenov P., Cizman M., Unuk S., Finlayson H., Dramowski A., Mate-Cano I., Soto B., Calvo C., Santiago B., Saavedra-Lozano J., Bustinza A., Escosa-Garcia L., Ureta N., Tagarro A., Barrero P.T., Rincon-Lopez E.M., Abubakar I., Aston J., Heginbothom M., Satodia P., Garbash M., Johnson A., Sharpe D., Barton C., Menson E., Arenas-Lopez S., Luck S., Doerholt K., McMaster P., Caldwell N.A., Lunn A., Drysdale S.B., Howe R., Scorrer T., Gahleitner F., Gupta R., Nash C., Alexander J., Raman M., Bell E., Rajagopal V., Kohlhoff S., Cox E., Zaoutis T., Versporten A., Bielicki J., Drapier N., Sharland M., Goossens H., Calle G.M., Clark J., Cooper C., Blyth C.C., Francis J.R., Alsalman J., Jansens H., Mahieu L., Van Rossom P., Vandewal W., Lepage P., Blumental S., Briquet C., Robbrecht D., Maton P., Gabriels P., and Rubic Z.

Abstract

Objectives: Previously, web-based tools for cross-sectional antimicrobial point prevalence surveys (PPSs) have been used in adults to develop indicators of quality improvement. We aimed to determine the feasibility of developing similar quality indicators of improved antimicrobial prescribing focusing specifically on hospitalized neonates and children worldwide. Method(s): A standardized antimicrobial PPS method was employed. Included were all inpatient children and neonates receiving an antimicrobial at 8:00 am on the day of the PPS. Denominators included the total number of inpatients. A web-based application was used for data entry, validation and reporting. We analysed 2012 data from 226 hospitals (H) in 41 countries (C) from Europe (174H; 24C), Africa (6H; 4C), Asia (25H; 8C), Australia (6H), Latin America (11H; 3C) and North America (4H). Result(s): Of 17 693 admissions, 6499 (36.7%) inpatients received at least one antimicrobial, but this varied considerably between wards and regions. Potential indicators included very high broad-spectrum antibiotic prescribing in children of mainly ceftriaxone (ranked first in Eastern Europe, 31.3%; Asia, 13.0%; Southern Europe, 9.8%), cefepime (ranked third in North America, 7.8%) and meropenem (ranked first in Latin America, 13.1%). The survey identified worryingly high use of critically important antibiotics for hospital-acquired infections in neonates (34.9%; range from 14.2% in Africa to 68.0% in Latin America) compared with children (28.3%; range from 14.5% in Africa to 48.9% in Latin America). Parenteral administration was very common among children in Asia (88%), Latin America (81%) and Europe (67%). Documentation of the reasons for antibiotic prescribing was lowest in Latin America (52%). Prolonged surgical prophylaxis rates ranged from 78% (Europe) to 84% (Latin America). Conclusion(s): Simple web-based PPS tools provide a feasible method to identify areas for improvement of antibiotic use, to set benchmarks and to

Published
2016

39. The transverse energy distribution in16O-nucleus collisions at 60 and 200 GeV per nucleon

Author

Åkesson, T., Almehed, S., Angelis, A. L. S., Armenise, N., Atherton, H., Aubry, P., Bartels, H. W., Bartley, J. H., Beaudoin, G., Beaulieu, J. M., Beker, H., Benary, O., Bettoni, D., Bisi, V., Blevis, I., Bøggild, H., Breskin, A., Chechik, R., Cleland, W., Clemen, M., Collick, B., Corriveau, F., Dagan, S., Dederichs, K., Dell'Uomo, S., Depommier, P., Devenish, R. C. E., Di Liberto, S., Di Giacomo, N., Dodd, J. R., Dolgoshein, B., Dress, A., En'yo, H., Erlandsson, B., Esten, M. J., Fabjan, C. W., Faessler, M., Fischer, P., Fraenkel, Z., Gaidot, A., Gavrilenko, I., Gibrat-Debu, F., Giubellino, P., Glässel, P., Goerlach, U., Haglund, R., Hamel, L. A., van Hecke, H., Hedberg, V., Heifetz, R., Heymann, F. F., Hölscher, A., Huber, S., Jacak, B., Jarslkog, G., Johansson, S., Kalinovski, A., Kantserov, A., Kraner, H., Kroh, V., Lamarche, F., Leroy, C., Lissauer, D., London, G., Lörstad, B., Lounis, A., Ludlam, T., Marzari-Chiesa, A., Masera, M., Mayburov, S., Mazzoni, M. A., McCubbin, M. L., McCubbin, N. A., McGaughey, P., Meddi, F., Mjörnmark, U., Muciaccia, M. T., Murray, M., Neubert, M., Nevski, P., Nilsson, S., Olsen, L., Oren, Y., Pansart, J. P., Park, Y. M., Pfeiffer, A., Piuz, F., Polychronakos, V., Poulard, G., Price, M., Rahm, D., Ramello, L., Riccati, L., Ries, H., Romano, G., Roosen, R., Rosa, G., Russ, J., Schukraft, J., Sekimoto, M., Sellden, B., Seman, M., Shmeleva, A., Shotton, P., Sidorov, V., Simone, S., Sirois, Y., Sletten, H., Smirnov, S., Soltani, J., Sondheim, W., Specht, H. J., Stumer, I., Sumarokov, A., Sunier, J., Tcherniatin, V., Thodberg, H. H., Thompson, J., Tikhomirov, V., Trent, P. T., Tserruya, I., Wigmans, R., Willis, W., and HELIOS Collaboration

Published
1988
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41. Transverse energy distributions in16O-nucleus collisions

Author

Corriveau, F., Åkesson, T., Almehed, S., Angelis, A. L. S., Armenise, N., Atherton, H., Aubry, P., Bartels, H. W., Bartley, J. H., Beaudoin, G., Beaulieu, J. M., Beker, H., Benary, O., Bettoni, D., Bisi, V., Blevis, I., Bøggild, H., Breskin, A., Chechik, R., Cleland, W., Clemen, M., Collick, B., Dagan, S., Dederichs, K., Dell'Uomo, S., Depommier, P., Devenish, R. C. E., DiLiberto, S., DiGiacomo, N., Dodd, J. R., Dolgoshein, B., Dress, A., En'yo, H., Erlandsson, B., Esten, M. J., Fabjan, C. W., Faessler, M., Fischer, P., Fraenkel, Z., Gaidot, A., Gavrilenko, I., Gibrat-Debu, F., Giubellino, P., Glässel, P., Goerlach, U., Haglund, R., Hamel, L. A., van Hecke, H., Hedberg, V., Heifetz, R., Heymann, F. F., Hölscher, A., Huber, S., Jacak, B., Jarlskog, G., Johansson, S., Kalinovski, A., Kantserov, A., Kramer, H., Kroh, V., Lamarche, F., Leroy, C., Lissauer, D., London, G., Lörstad, B., Lounis, A., Ludlam, T., Marzari-Chiesa, A., Masera, M., Mayburov, S., Mazzoni, M. A., McCubbin, M. L., McCubbin, N. A., McGaughey, P., Meddi, F., Mjörnmark, U., Muciaccia, M. T., Murray, M., Neubert, M., Nevski, P., Nilsson, S., Olsen, L., Oren, Y., Pansart, J. P., Park, Y. M., Pfeiffer, A., Piuz, F., Polychronakos, V., Poulard, G., Price, M., Rahm, D., Ramello, L., Riccati, L., Ries, H., Romano, G., Roosen, R., Rosa, G., Russ, J., Schukraft, J., Sekimoto, M., Sellden, B., Seman, M., Shmeleva, A., Shotton, P., Sidorov, V., Simone, S., Sirois, Y., Sletten, H., Smirnov, S., Soltani, J., Sondheim, W., Specht, H. J., Stumer, I., Sumarokov, A., Sunier, J., Tcherniatin, V., Thodberg, H. H., Thompson, J., Tikhomirov, V., Trent, P. T., Tserruya, I., Wigmans, R., Willis, W., and HELIOS Collaboration

Published
1988
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42. The antibiotic resistance and prescribing in European Children project: a neonatal and pediatric antimicrobial web-based point prevalence survey in 73 hospitals worldwide

Author

Versporten, A, Sharland, M, Bielicki, J, Drapier, N, Vankerckhoven, V, Goossens, H, ARPEC Project Group Members, Cooper, C, Lee, Ly, Whitehouse, J, Bryant, Pa, Haeusler, G, Curtis, N, Starr, M, Vergison, A, Léon, V, Delestrait, M, Huza, C, Lepage, P, Mahieu, L, Boiy, T, Jansens, H, Van der Linden, D, Briquet, C, Allegaert, K, Smits, A, Lutsar, I, Tamm, E, Larionova, A, Orbach, D, Lorrot, M, Angoulvant, F, Doit, C, Prot-Labarthe, S, Dubos, F, Lagree, M, Biscardi, S, Decobert, F, Hau, I, Madhi, F, Durrmeyer, X, Bojang, K, Abubakr, I, Okomo, U, Awe, R, Anderson, S, Akwara, I, Ideh, Rc, Pagava, K, Hufnagel, M, Schuster, K, Henneke, P, Enimil, A, Osei-Akoto, A, Nguah, Sb, Ansong, D, Iosifidis, E, Roilides, E, Spyridis, N, Syridou, G, Soltani, J, Soleimani, N, Nahedi, S, Khosravi, F, Pouladfar, G, Jafarpour, Z, Giacquinto, C, Longo, G, Donà, D, Mion, T, D'Argenio, P, Ciofi Degli Atti ML, De Luca, M, Ciliento, G, Esposito, S, Danieli, E, Montinaro, V, Tenconi, R, Centenari, C, Nicolini, G, Mozgis, D, Sviestina, I, Pavare, J, Rasnaca, K, Gardovska, D, Grope, I, Usonis, V, Gurksniene, V, Eidukaite, A, Biver, A, Bennett, A, O'Hare, B, Kennedy, N, Brett, A, Rodrigues, F, Esteves, I, Cambrea, Sc, Craiu, M, Tomescu, E, Al Shehri MA, Al Shahrani, D, Cizman, M, Babnik, J, Kenda, R, Vidmar, I, Finlayson, H, Rabie, H, Cotton, M, Dramowski, A, Rodrigo, C, Mendez, M, Rojo, P, López-Varela, E, Ureta, N, Mosqueda, R, Pérez-López, A, Orta, L, Santos, M, Navarro, M, Santiago, B, Hernández-Sampelayo, T, Saavedra, J, Bustinza, A, Gil, J, Valls, A, Santesteban, E, Baumann, P, Berger, C, Gifford, A, Menson, E, Botgros, A, Arenas-Lopez, S, Wade, P, Doerholt, K, Drysdale, Sb, Mcelnay, Jc, Kearney, Mp, Scott, Mg, Magee, Fa, Aldeyab, M, Heginbothom, M, Newland, Jg, Hedican, Eb, Shah, H, Stach, L, and Yu, D

Subjects
Microbiology (medical), Pediatrics, medicine.medical_specialty, medicine.drug_class, Antibiotics, MEDLINE, Drug resistance, Drug Prescriptions, point prevalence survey, antibiotic use, Antibiotic resistance, Intensive care, Drug Resistance, Bacterial, Medicine, Humans, Child, Electronic Data Processing, Internet, business.industry, Health services research, Antimicrobial, antimicrobial use, Confidence interval, Drug Utilization, Hospitals, Anti-Bacterial Agents, Europe, Infectious Diseases, Pediatrics, Perinatology and Child Health, surveillance, hospitalized children, Health Services Research, business, Public Health Administration
Abstract

Background The neonatal and pediatric antimicrobial point prevalence survey (PPS) of the Antibiotic Resistance and Prescribing in European Children project (http://www.arpecproject.eu/) aims to standardize a method for surveillance of antimicrobial use in children and neonates admitted to the hospital within Europe. This article describes the audit criteria used and reports overall country-specific proportions of antimicrobial use. An analytical review presents methodologies on antimicrobial use. Methods A 1-day PPS on antimicrobial use in hospitalized children was organized in September 2011, using a previously validated and standardized method. The survey included all inpatient pediatric and neonatal beds and identified all children receiving an antimicrobial treatment on the day of survey. Mandatory data were age, gender, (birth) weight, underlying diagnosis, antimicrobial agent, dose and indication for treatment. Data were entered through a web-based system for data-entry and reporting, based on the WebPPS program developed for the European Surveillance of Antimicrobial Consumption project. Results There were 2760 and 1565 pediatric versus 1154 and 589 neonatal inpatients reported among 50 European (n = 14 countries) and 23 non-European hospitals (n = 9 countries), respectively. Overall, antibiotic pediatric and neonatal use was significantly higher in non-European (43.8%; 95% confidence interval [CI]: 41.3-46.3% and 39.4%; 95% CI: 35.5-43.4%) compared with that in European hospitals (35.4; 95% CI: 33.6-37.2% and 21.8%; 95% CI: 19.4-24.2%). Proportions of antibiotic use were highest in hematology/oncology wards (61.3%; 95% CI: 56.2-66.4%) and pediatric intensive care units (55.8%; 95% CI: 50.3-61.3%). Conclusions An Antibiotic Resistance and Prescribing in European Children standardized web-based method for a 1-day PPS was successfully developed and conducted in 73 hospitals worldwide. It offers a simple, feasible and sustainable way of data collection that can be used globally.

Published
2013

43. Sensorless Control of a Six-Phase Induction Motors Drive Using FOC in Stator Flux Reference Frame

Author

Arab Markadeh, G. R., Soltani, J., Navid Reza Abjadi, and Hajian, M.

Subjects
Quantitative Biology::Subcellular Processes, Multiphase motors, Stator FOC, sensorless
Abstract

In this paper, a direct torque control - space vector modulation (DTC-SVM) scheme is presented for a six-phase speed and voltage sensorless induction motor (IM) drive. The decoupled torque and stator flux control is achieved based on IM stator flux field orientation. The rotor speed is detected by on-line estimating of the rotor angular slip speed and stator vector flux speed. In addition, a simple method is introduced to estimate the stator resistance. Moreover in this control scheme the voltage sensors are eliminated and actual motor phase voltages are approximated by using PWM inverter switching times and the dc link voltage. Finally, some simulation and experimental results are presented to verify the effectiveness and capability of the proposed control scheme., {"references":["E. Levi, S. N. Vukosavic and M. Jones, \"Vector control schemes for series-connected six-phase two-motor drive systems\", IEE Proc.-Electr. Power Appl., Vol. 152, No. 2, March 2005.","M. Jones, S. N. Vukosavic, E. Levi and A. Iqbal, \"A Six-Phase Series-\nConnected Two-Motor Drive With Decoupled Dynamic Control\", IEEE\nTrans. on Ind. Appl., Vol. 41, No. 4, July/August 2005.","R. H. Nelson and P. C. Krause, \"Induction machine analysis for arbitrary displacement between multiple winding sets,\" IEEE Trans. Power App. Syst., vol. PAS-93, no. 3, pp. 841-848, may/Jun. 1974.","Y. Zhao and T. A. Lipo, \"Space Vector PWM Control of Dual Threephase\nInduction Machine Using Vector Space Decomposition\", IEEE\nTrans. on Ind. Appl., Vol. 31, No. 5, Sep./Oct. 1995, pp. 1100-1109.","R. Bojoi, M. Lazzari, F. Profumo and A. Tenconi, \"Digital field oriented\ncontrol for dual three-phase induction motor drives,\" in Proc. IEEE-IAS\nAnnu. Meeting, Pittsburgh, PA, 2002, CD-ROM, Paper 22P1.","R. Bojoi, M. Lazzari, F. Profumo and A. Tenconi, \"Digital Field-Oriented Control for Dual Three-Phase Induction Motor Drives\", IEEE\nTrans. On INDUSTRY Appl., Vol. 39, No. 3, May/June 2003, pp. 752-760.","R. Krishnan and F.C. Doran, \"Study of Parameter Sensitivity in\nHigh Performance Invereter-Fed Induction Motor Drive\nSystem\". IEEE Trans. Ind. Application, vol. 23, no. 4, 1987, pp. 623-635.","Radu Bojoi, Member, IEEE, Paolo Guglielmi, Member, IEEE, and\nGian-Mario Pellegrino, \"Sensorless Direct Field-Oriented Control of\nThree-Phase Induction Motor Drives for Low-Cost Applications\", IEEE\nTrans. on Ind. Appl., Vol. 44, No. 2, March/April 2008, pp. 475-481.","H. Jun, B. R. Duggal, M. Vilathgamuwa, \"A MRAS-based speed sensorless field oriented control of induction motor with on-line stator\nresistance tuning\", International Conference on Power Electronics and\nEnergy Systems for Industrial Growth, Perth, Australia, December 1998,\nVol.1, pp. 38-43.\n[10] M. Ghanes, J. De Leon, A. Glumineau, \"Cascade and high-gain observers comparison for sensorless closed-loop induction motor\ncontrol\", IET Control Theory Appl., 2008, Vol. 2, No. 2, pp. 133-150.\n[11] M. Arkan, \"Sensorless speed estimation in induction motor drives by\nusing the space vector angular fluctuation signal\", IET Electr. Power\nAppl., 2008, Vol. 2, No. 2, pp. 113-120.\n[12] Koichiro Nagata, Toshiaki Okuyama, Haruo Nemoto, and Toshio\nKatayama, \"A Simple Robust Voltage Control of High Power Sensorless Induction Motor Drives With High Start Torque Demand\", IEEE Trans.\non Ind. Appl., Vol. 44, No. 2, March/April 2008, pp. 604-611.\n[13] Dramane Traoré, Franck Plestan, Alain Glumineau, and Jesus de Leon,\n\"Sensorless Induction Motor: High-Order Sliding-Mode Controller and Adaptive Interconnected Observer\", IEEE Trans. on Ind. Electr., Vol. 55, No. 11, Nov. 2008, pp. 3818-3827.\n[14] Hassan K. Khalil, Elias G. Strangas, and Sinisa Jurkovic, \"Speed\nObserver and Reduced Nonlinear Model for Sensorless Control of\nInduction Motors\", IEEE Trans. on Control Systems Tech., Vol. 17, No.\n2, March 2009, pp. 327-339.\n[15] S. Doki, Y. Kinpara, S. Okuma, \"Unified interpretation of indirect and direct vector control\", PCC-Yokohama '93, 1993, pp. 297-302."]}

Published
2009
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44. Stator-Flux-Oriented Based Encoderless Direct Torque Control For Synchronous Reluctance Machines Using Sliding Mode Approach

Author

Soltani, J., Hossein Abootorabi Zarchi, and Arab Markadeh, G. R.

Subjects
Quantitative Biology::Subcellular Processes, Direct Torque and Flux Control, Synchronous Reluctance Motor, Encoderless, Sliding Mode, Field-Oriented Frame
Abstract

In this paper a sliding-mode torque and flux control is designed for encoderless synchronous reluctance motor drive. The sliding-mode plus PI controllers are designed in the stator-flux field oriented reference frame which is able to track the mentioned reference signals with a minimum pulsations in the state condition. In addition, with these controllers a fast dynamic response is also achieved for the drive system. The proposed control scheme is robust subject to parameters variation except to stator resistance. To solve this problem a simple estimator is used for on-line detecting of this parameter. Moreover, the rotor position and speed are estimated by on-line obtaining of the stator-flux-space vector. The effectiveness and capability of the proposed control approach is verified by both the simulation and experimental results., {"references":["T. A. Lipo, ÔÇÿSynchronous Reluctance Machines- A viable alternative for\nac drives-, Electric Machines and Power Systems, 1991, vol. 19, pp. 659-671.","H.F. Hofmann, S.R. Sanders, and A. EL-Antably, \"Stator-flux-oriented\nvector control of synchronous reluctance Machines with maximized efficiency\", IEEE Trans. On Ind. Elect., vol. 51, Issue 5, Oct. 2004, pp.\n1066-1072.","P. Guglielmi, M. Pastorelli, A. Vagati,\" Impact of cross-saturation in\nsensorless control of transverse-laminated synchronous reluctance\nmotors\", IEEE Trans. On Ind. Elect., vol. 53, Issue 2, 2006, pp. 429-439.","R. Morales Caporal and M. Pacas, \"Encoderless Predictive DTC for\nSynRM at Very Low and Zero Speed\", IEEE Trans. Ind. Elect., vol. 55,\nNo. 12, Dec. 2008, pp. 4408-4416.","T. H. Liu and H. H. Hsu, \"Adaptive Controller Design for a Synchronous Reluctance Motor Drive System with Direct Torque\nControl\", IET Electric Power Appl., Vol.1, No.5, 2007, pp. 815-824","R. Morales Caporal and M. Pacas, \"A Predictive Torque Control for the\nSynchronous Reluctance Machine taking into account the magnetic cross\nsaturation\", IEEE Trans. Ind. Elect., vol. 54, No. 2, 2007, pp. 1161-1167.","H. D. Lee, S. J. Kang and S. K. Sul, \"Efficiency-Optimized Direct\nTorque Control of Synchronous Reluctance Motor Using Feedback\nLinearization\", IEEE Trans. on Ind. Elect., vol. 46, No. 1, pp 192-198,\n1999es and Power Systems, vol. 19, 1991, pp. 659-671.","I. Takahashi and N. Noguchi, \"A New Quick Response and High\nEfficiency Control Strategy of an Induction Motor\", IEEE Trans. Ind.\nAppl., Vol. 22, 1986, pp. 820-827.","D. Casadi, F. P rofumo, G. Serra and A. Tani, \" FOC and DTC: Two\nVariable Schemes for Induction Motors Torque Control\", IEEE Trans.\nPower Elec., Vol. 17, No. 5, Sept. 2002, pp. 779-787.\n[10] R. Marino, and P. Tomei, ÔÇÿNonlinear Control Design-, Prentice Hall, Inc,1995.\n[11] J.Y. Hung, W. Gao, and Hung, J.C., \"Variable structure control: a\nsurvey\", IEEE Trans. Ind. Elect., Issue 1, vol. 40, Feb. 1993, pp. 2-22.\n[12] Z. Xu and M. F. Rahman, \"Direct Torque and Flux Regulation of an\nIPM Synchronous Motor Drive Using Variable Structure Control\nApproach\", IEEE Trans. On Power Elect., vol. 22, No.6 , Nov. 2007, pp. 2487-2498.\n[13] C. Lascu, I. Boldea and F. Blaabjerg, \" very Low Speed Variable\nStructure Control of Sensorless Induction Machine Drives without\nSignal Injection\", IEEE Trans. Ind. Appl., vol. 41, No. 2, Mar./Apr. 2005, pp. 591-598.\n[14] D. Casadei, G. Serra, and A. Tani, \"Implementation of a direct torque\ncontrol algorithm for induction motors based on discrete space vector\nmodulation,\" IEEE Trans. Power Elec., vol. 15, July 2000, pp. 769-777.\n[15] C. Lascu, I. Boldea, and F. Blaabjerg, \"A modified direct torque control\nfor induction motor sensorless drive,\" IEEE Trans. Ind. Appl., vol. 36,\nJan./Feb. 2000, pp. 122-130.\n[16] L Tang, and M. F Rahman, \" Investigation of an Improved Flux\nEstimator of a Direct Torque Controlled Interior Permanent Magnet\nSynchronous Machine Drive\", 35th Annual IEEE Power Electronics\nSpecialists Conf., Aachen, Germany, 2004, pp. 451-457.\n[17] S. Mir, M.E Elbuluk, and D.S Zinger, \"PI and Fuzzy Estimators for Tuning the Stator Resistance in Indirect Torque Control of Induction Machines\", IEEE Tran. On Power Elect., vol. 13, No. 2, March 1998, pp. 279-287."]}

Published
2009
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45. Host genes involved in Agrobacterium-mediated transformation

Author

Soltani, J., Hooykaas, P.J.J., Heusden, G.P.H. van, and Leiden University

Subjects
Chromatin remodeling, Host genes, Histone modifying complexes, Interaction partners, Agrobacterium, Yeast Saccharomyces cerevisiae, Large-scale Agrobacterium-mediated transformatiom (AMT), VirD2
Abstract

Agrobacterium is the natures genetic engineer that can transfer genes across the kingdom barriers to both prokaryotic and eukaryotic host cells. The host genes which are involved in Agrobacterium-mediated transformatiom (AMT) are not well known. Here, I studied in a systematic way to identify the whole eukaryotic host genes which are involved in this event. For this, I used a collection of around 4800 homozygous diploid deletion mutants and the cDNA libraries of yeast Saccharomyces cerevisiae as the eukaryotic host and two strains of Agrobacterium. First, a large-scale AMT protocol for the transformation of yeast mutants was developed. Then, the yeast mutant collection was screened for the mutants with an increased or a decreased AMT. 249 deletion mutant strains were found which affect AMT. Of great importance were host chromatin remodeling and histone modifying complexes. Besides, using GFP technique I showed the nuclear localization of Agrobacteriums VirD2 in yeast. Yeast two-hybrid screens also identified 12 yeast putative interaction partners of VirD2 protein.

Published
2009

46. Cultural Confusion; competing narratives in contemporary Iran

Author

Soltani, J., Raven, Diederick (Thesis Advisor), Soltani, J., and Raven, Diederick (Thesis Advisor)

Abstract

The paradoxical socio-political developments of the Iranian society are due to a serious case of national identity crisis. It has been caused by the competition between four cultural narratives, all of which put a political claim on the Iranian national identity. This thesis first examines each narrative’s worldview and the course of its inclusion in the Iranian society, showing their incompatibilities along the way. From then on, it demonstrates that instead of merely choosing different stances, the majority of the Isfahani society clings on to all narratives at the same time by attempting an inherently disjointed and conflictive conciliation between these narratives. As a result, they mix concepts and ideas with each other which conceptually aren’t mixable. I call this cultural confusion. Finally, by attempting a harmony between essentialism and constructivism, I modify the cultural theory of Seyla Benhabib and come up with an account of culture that can accommodate such an inherently contrasting and heterogeneous account.

Published
2011

47. Endohyphal bacteria from fungal endophytes of the Mediterranean cypress ( Cupressus sempervirens) exhibit in vitro bioactivity.

Author

Pakvaz, S., Soltani, J., and Belbahri, L.

Subjects
*ENDOPHYTIC fungi, *CYPRESS, *BACILLACEAE, *HOST plants, *IN vitro studies
Abstract

Endohyphal organisms of endophytic fungi can induce, or promote, beneficial effects of their respective host fungi to the host plant that harbours them. The Cupressaceae plant family (Coniferales) hosts highly bioactive endophytic fungi. Here, we show that a fraction of such endophytic fungi harbours bioactive endohyphal bacteria with a non-obligatory symbiotic lifestyle. Indeed, 5 of 16 (31.25%) endophytic fungi of Cupressus sempervirens harboured endofungal bacterial strains of Bacillaceae (G+, Bacilli) and Sphingomonadaceae (G−, α-Proteobacteria), that is Bacillus pumilus (from the fungi Leptosphaeria CSE211 and Pyrenochaeta CSE134), Bacillus subtilis (from the fungi Leptosphaeria CSE212 and Ascorhizoctonia CSE148) and Sphingomonas paucimobilis (from the fungus Ascorhizoctonia CSE195). Notably, each endophytic fungal species contained only one endofungal bacterial species that was stably maintained in symbiosis over several rounds of subculturing. Moreover, we investigated whether cypress endofungal bacteria ( CEB) could benefit their host fungus competing with other fungi and bacteria or the host plant against the invading microorganisms. In vitro assays indicated that CEB possessed antagonistic activity against cypress endophytic and pathogenic microbiome. Also, CEB metabolites and volatile compounds ( VOCs) exhibited antifungal and antibacterial activity against the target microbiome. Bioactivity of CEB was less than that of the endophytic microbiome of Cupressaceae, on which we reported earlier. In conclusion, our work is the first to document endohyphal bacteria of fungal endophytes of C. sempervirens and the bioactivity of such endohyphal symbionts. These findings implicate a complicated interrelationship among host plant, endophytic microbiome and endofungal bacteria, which might be of high importance for evolutionary, as well as environmental and agricultural studies. Eventually, endohyphal bacteria may be introduced as a novel source for lead molecule discovery. [ABSTRACT FROM AUTHOR]

Published
2016
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