Jean-françois Germain - Academia.edu (original) (raw)

Papers by Jean-françois Germain

Zootaxa, 2015

At the end of August 2014, a visitor to the French National Plant Protection service (NPPO) in Ca... more At the end of August 2014, a visitor to the French National Plant Protection service (NPPO) in Cayenne (French Guiana) brought in mango twigs covered with a significant amount of sooty mould. From these branches, the NPPO officers took large numbers of mealybugs from the underside of the leaves (Fig. 1). The sample was sent to the Plant Health Laboratory (LSV) in Montpellier where it was identified as Rastrococcus invadens Williams. This is the first record of this species in French Guiana and in the Americas.

BioRisk, 2010

Scale insects are frequent invaders. With 129 established species, they numerically represent one... more Scale insects are frequent invaders. With 129 established species, they numerically represent one of the major group of insects alien to Europe. Scales are usually small insects with wingless females. Due to this small size and concealment, many species, mainly belonging to the families Diaspididae, Pseudococcidae and Pseudococcidae, have been accidentally introduced to Europe, mostly originating from tropical regions and essentially from Asia. Th e trade of fruit trees and ornamentals appears to be the usual pathway of introduction. At present, alien scales represent an important component of the European entomofauna, accounting for about 30% of the total scale fauna.

Scandinavian Journal of Statistics, 2010

We consider an estimator b β n (t) defined as the element φ ∈ Φ minimizing a contrast process Λn(... more We consider an estimator b β n (t) defined as the element φ ∈ Φ minimizing a contrast process Λn(φ, t) for each t. We give some general results for deriving the weak convergence of √ n( b β n − β) in the space of bounded functions, where, for each t, β(t) is the φ ∈ Φ minimizing the limit of Λn(φ, t) as n → ∞. These results are applied in the context of penalized M-estimation, that is, when Λn(φ, t) = Mn(φ) + tJn(φ), where Mn is a usual contrast process and Jn a penalty such as the ℓ 1 norm or the squared ℓ 2 norm. The function b β n is then called a regularization path. For instance we show that the central limit theorem established for the lasso estimator in continues to hold in a functional sense for the regularization path. Other examples include various possible contrast processes for Mn such as those considered in Pollard [1985].

Florida Entomologist, 2007

entsoc.gr

Scale insects are frequent invaders of new territories. The Bougainvillea mealybug, Phenacoccus p... more Scale insects are frequent invaders of new territories. The Bougainvillea mealybug, Phenacoccus peruvianus Granara de Willink, 2007, was recorded in Europe for the first time in 1999 in Spain (Almeria) and later in 2002 in Italy (Sicily). Initially, this unknown species was identified provisionally as Phenacoccus sp. Records of this species became frequent later when it was found in other localities in Spain (including the Balearic Islands), Great Britain, France (including Corsica), Monaco, and Portugal. The host plants of this mealybug were in most cases species of Bougainvillea.

Journal of Applied Clinical Medical Physics, 2004

This paper presents the results of a one year survey of treated fields for 3 treatment machines a... more This paper presents the results of a one year survey of treated fields for 3 treatment machines at our New Jersey regional center. One machine, predominantly, treated IMRT prostate patients using a sliding window technique. The others were not equipped to deliver IMRT. Information obtained for each treated field included patient number, modality, monitor units delivered, gantry angle and time. Data was obtained directly from our record and verify system, and analyzed using a spreadsheet. We studied workload (MU/wk), patient load and average MU per patient as a function of time as well as angular distributions and number of treatment fractions per patient. We also calculated the fraction of time the beam was on during treatments.

Medical physics, 2011

Effective dose (E) is useful as a dose index for patient exposures in interventional radiology; t... more Effective dose (E) is useful as a dose index for patient exposures in interventional radiology; therefore, the authors estimated E from the kerma-area product (P(KA)) utilized during hepatic embolization interventional radiology cases performed at a cancer center and determined the variation of such doses over a representative patient population. A single-center, IRB-approved retrospective study was performed to estimate doses from consecutive hepatic embolization procedures performed during 2006. Organ doses E and E/P(KA) were determined from patient height, weight, P(KA), procedure geometry factors, beam quality, the PCXMC Monte Carlo model, and the International Commission on Radiological Protection organ weighting factors. One hundred thirteen patients were included in the study population, 72 males and 41 females, with a median age of 63 yr (29-89 yr), weight of 79 kg (42-111 kg), height of 170 cm (147-188 cm), and P(KA) of 233 Gy cm2 (9-1020 Gy cm2). E was directly correlated ...

BMC medical education, Jan 8, 2006

Radiation, for either diagnosis or treatment, is used extensively in the field of oncology. An un... more Radiation, for either diagnosis or treatment, is used extensively in the field of oncology. An understanding of oncology radiation safety principles and how to apply them in practice is critical for nursing practice. Misconceptions about radiation are common, resulting in undue fears and concerns that may negatively impact patient care. Effectively educating nurses to help overcome these misconceptions is a challenge. Historically, radiation safety training programs for oncology nurses have been compliance-based and behavioral in philosophy. A new radiation safety training initiative was developed for Memorial Sloan-Kettering Cancer Center (MSKCC) adapting elements of current adult education theories to address common misconceptions and to enhance knowledge. A research design for evaluating the revised training program was also developed to assess whether the revised training program resulted in a measurable and/or statistically significant change in the knowledge or attitudes of nu...

Encyclopedia of Radiation Oncology, 2013

Encyclopedia of Radiation Oncology, 2013

ABSTRACT

Encyclopedia of Radiation Oncology, 2013

Encyclopedia of Radiation Oncology, 2013

Encyclopedia of Radiation Oncology, 2013

Encyclopedia of Radiation Oncology, 2013

Encyclopedia of Radiation Oncology, 2013

Encyclopedia of Radiation Oncology, 2013

Encyclopedia of Radiation Oncology, 2013

Pediatric Blood & Cancer, 2008

Medical Physics, 2012

Patient exposure rate measurements verify published patient dose rate data and characterize dose ... more Patient exposure rate measurements verify published patient dose rate data and characterize dose rates near 2-18-fluorodeoxyglucose ((18)F-FDG) patients. A specific dose rate constant based on patient exposure rate measurements is a convenient quantity that can be applied to the desired distance, injection activity, and time postinjection to obtain an accurate calculation of cumulative external radiation dose. This study reports exposure rates measured at various locations near positron emission tomography (PET) (18)F-FDG patients prior to PET scanning. These measurements are normalized for the amount of administered activity, measurement distance, and time postinjection and are compared with other published data. Exposure rates were measured using a calibrated ionization chamber at various body locations from 152 adult oncology patients postvoid after a mean uptake time of 76 min following injection with a mean activity of 490 MBq (18)F-FDG. Data were obtained at nine measurement locations for each patient: three near the head, four near the chest, and two near the feet. On contact with, 30 cm superior to and 30 cm lateral to the head, the mean (75th percentile) dose rates per unit injected activity at 60 min postinjection were 0.482 (0.511), 0.135 (0.155), and 0.193 (0.223) μSv∕MBq h, respectively. On contact with, 30 cm anterior to, 30 cm lateral to and 1 m anterior to the chest, the mean (75th percentile) dose rates per unit injected activity at 60 min postinjection were 0.623 (0.709), 0.254 (0.283), 0.190 (0.218), and 0.067 (0.081) μSv∕MBq h respectively. 30 cm inferior and 30 cm lateral to the feet, the mean (75th percentile) dose rates per unit injected activity at 60 min postinjection were 0.024 (0.022) and 0.039 (0.044) μSv∕MBq h, respectively. The measurements for this study support the use of 0.092 μSv m(2)∕MBq h as a reasonable representation of the dose rate anterior from the chest of patients immediately following injection. This value can then be reliably scaled to the desired time and distance for planning and staff dose evaluation purposes. At distances closer than 1 m, a distance-specific dose rate constant of 0.367 μSv∕MBq h at 30 cm is recommended for accurate calculations. An accurate patient-specific dose rate constant that accounts for patient-specific variables (e.g., distribution and attenuation) will allow an accurate evaluation of the dose rate from a patient injected with an isotope rather than simply utilizing a physical constant.

Zootaxa, 2015

At the end of August 2014, a visitor to the French National Plant Protection service (NPPO) in Ca... more At the end of August 2014, a visitor to the French National Plant Protection service (NPPO) in Cayenne (French Guiana) brought in mango twigs covered with a significant amount of sooty mould. From these branches, the NPPO officers took large numbers of mealybugs from the underside of the leaves (Fig. 1). The sample was sent to the Plant Health Laboratory (LSV) in Montpellier where it was identified as Rastrococcus invadens Williams. This is the first record of this species in French Guiana and in the Americas.

BioRisk, 2010

Scale insects are frequent invaders. With 129 established species, they numerically represent one... more Scale insects are frequent invaders. With 129 established species, they numerically represent one of the major group of insects alien to Europe. Scales are usually small insects with wingless females. Due to this small size and concealment, many species, mainly belonging to the families Diaspididae, Pseudococcidae and Pseudococcidae, have been accidentally introduced to Europe, mostly originating from tropical regions and essentially from Asia. Th e trade of fruit trees and ornamentals appears to be the usual pathway of introduction. At present, alien scales represent an important component of the European entomofauna, accounting for about 30% of the total scale fauna.

Scandinavian Journal of Statistics, 2010

We consider an estimator b β n (t) defined as the element φ ∈ Φ minimizing a contrast process Λn(... more We consider an estimator b β n (t) defined as the element φ ∈ Φ minimizing a contrast process Λn(φ, t) for each t. We give some general results for deriving the weak convergence of √ n( b β n − β) in the space of bounded functions, where, for each t, β(t) is the φ ∈ Φ minimizing the limit of Λn(φ, t) as n → ∞. These results are applied in the context of penalized M-estimation, that is, when Λn(φ, t) = Mn(φ) + tJn(φ), where Mn is a usual contrast process and Jn a penalty such as the ℓ 1 norm or the squared ℓ 2 norm. The function b β n is then called a regularization path. For instance we show that the central limit theorem established for the lasso estimator in continues to hold in a functional sense for the regularization path. Other examples include various possible contrast processes for Mn such as those considered in Pollard [1985].

Florida Entomologist, 2007

entsoc.gr

Scale insects are frequent invaders of new territories. The Bougainvillea mealybug, Phenacoccus p... more Scale insects are frequent invaders of new territories. The Bougainvillea mealybug, Phenacoccus peruvianus Granara de Willink, 2007, was recorded in Europe for the first time in 1999 in Spain (Almeria) and later in 2002 in Italy (Sicily). Initially, this unknown species was identified provisionally as Phenacoccus sp. Records of this species became frequent later when it was found in other localities in Spain (including the Balearic Islands), Great Britain, France (including Corsica), Monaco, and Portugal. The host plants of this mealybug were in most cases species of Bougainvillea.

Journal of Applied Clinical Medical Physics, 2004

This paper presents the results of a one year survey of treated fields for 3 treatment machines a... more This paper presents the results of a one year survey of treated fields for 3 treatment machines at our New Jersey regional center. One machine, predominantly, treated IMRT prostate patients using a sliding window technique. The others were not equipped to deliver IMRT. Information obtained for each treated field included patient number, modality, monitor units delivered, gantry angle and time. Data was obtained directly from our record and verify system, and analyzed using a spreadsheet. We studied workload (MU/wk), patient load and average MU per patient as a function of time as well as angular distributions and number of treatment fractions per patient. We also calculated the fraction of time the beam was on during treatments.

Medical physics, 2011

Effective dose (E) is useful as a dose index for patient exposures in interventional radiology; t... more Effective dose (E) is useful as a dose index for patient exposures in interventional radiology; therefore, the authors estimated E from the kerma-area product (P(KA)) utilized during hepatic embolization interventional radiology cases performed at a cancer center and determined the variation of such doses over a representative patient population. A single-center, IRB-approved retrospective study was performed to estimate doses from consecutive hepatic embolization procedures performed during 2006. Organ doses E and E/P(KA) were determined from patient height, weight, P(KA), procedure geometry factors, beam quality, the PCXMC Monte Carlo model, and the International Commission on Radiological Protection organ weighting factors. One hundred thirteen patients were included in the study population, 72 males and 41 females, with a median age of 63 yr (29-89 yr), weight of 79 kg (42-111 kg), height of 170 cm (147-188 cm), and P(KA) of 233 Gy cm2 (9-1020 Gy cm2). E was directly correlated ...

BMC medical education, Jan 8, 2006

Radiation, for either diagnosis or treatment, is used extensively in the field of oncology. An un... more Radiation, for either diagnosis or treatment, is used extensively in the field of oncology. An understanding of oncology radiation safety principles and how to apply them in practice is critical for nursing practice. Misconceptions about radiation are common, resulting in undue fears and concerns that may negatively impact patient care. Effectively educating nurses to help overcome these misconceptions is a challenge. Historically, radiation safety training programs for oncology nurses have been compliance-based and behavioral in philosophy. A new radiation safety training initiative was developed for Memorial Sloan-Kettering Cancer Center (MSKCC) adapting elements of current adult education theories to address common misconceptions and to enhance knowledge. A research design for evaluating the revised training program was also developed to assess whether the revised training program resulted in a measurable and/or statistically significant change in the knowledge or attitudes of nu...

Encyclopedia of Radiation Oncology, 2013

Encyclopedia of Radiation Oncology, 2013

ABSTRACT

Encyclopedia of Radiation Oncology, 2013

Encyclopedia of Radiation Oncology, 2013

Encyclopedia of Radiation Oncology, 2013

Encyclopedia of Radiation Oncology, 2013

Encyclopedia of Radiation Oncology, 2013

Encyclopedia of Radiation Oncology, 2013

Encyclopedia of Radiation Oncology, 2013

Pediatric Blood & Cancer, 2008

Medical Physics, 2012

Patient exposure rate measurements verify published patient dose rate data and characterize dose ... more Patient exposure rate measurements verify published patient dose rate data and characterize dose rates near 2-18-fluorodeoxyglucose ((18)F-FDG) patients. A specific dose rate constant based on patient exposure rate measurements is a convenient quantity that can be applied to the desired distance, injection activity, and time postinjection to obtain an accurate calculation of cumulative external radiation dose. This study reports exposure rates measured at various locations near positron emission tomography (PET) (18)F-FDG patients prior to PET scanning. These measurements are normalized for the amount of administered activity, measurement distance, and time postinjection and are compared with other published data. Exposure rates were measured using a calibrated ionization chamber at various body locations from 152 adult oncology patients postvoid after a mean uptake time of 76 min following injection with a mean activity of 490 MBq (18)F-FDG. Data were obtained at nine measurement locations for each patient: three near the head, four near the chest, and two near the feet. On contact with, 30 cm superior to and 30 cm lateral to the head, the mean (75th percentile) dose rates per unit injected activity at 60 min postinjection were 0.482 (0.511), 0.135 (0.155), and 0.193 (0.223) μSv∕MBq h, respectively. On contact with, 30 cm anterior to, 30 cm lateral to and 1 m anterior to the chest, the mean (75th percentile) dose rates per unit injected activity at 60 min postinjection were 0.623 (0.709), 0.254 (0.283), 0.190 (0.218), and 0.067 (0.081) μSv∕MBq h respectively. 30 cm inferior and 30 cm lateral to the feet, the mean (75th percentile) dose rates per unit injected activity at 60 min postinjection were 0.024 (0.022) and 0.039 (0.044) μSv∕MBq h, respectively. The measurements for this study support the use of 0.092 μSv m(2)∕MBq h as a reasonable representation of the dose rate anterior from the chest of patients immediately following injection. This value can then be reliably scaled to the desired time and distance for planning and staff dose evaluation purposes. At distances closer than 1 m, a distance-specific dose rate constant of 0.367 μSv∕MBq h at 30 cm is recommended for accurate calculations. An accurate patient-specific dose rate constant that accounts for patient-specific variables (e.g., distribution and attenuation) will allow an accurate evaluation of the dose rate from a patient injected with an isotope rather than simply utilizing a physical constant.