Tarun Goyal - Academia.edu (original) (raw)

Papers by Tarun Goyal

Chinese Journal of Traumatology (english Edition), 2011

Traumatic posterior dislocation of hip associated with ipsilateral displaced femoral neck fractur... more Traumatic posterior dislocation of hip associated with ipsilateral displaced femoral neck fracture is a rare injury. Moreover, the management of such patients evokes strong views regarding primary replacement or preserving the femoral head. We presented a case of young adult with such an injury. He was operated upon with reduction of the dislocation and fixation of femoral neck fracture with the help of cancellous screws. Two years later, the fracture had united and the patient was asymptomatic. We further proposed the mechanism of injury for such a fracture and discussed the management in the changing trauma scenario of the developing world.

Materials and Manufacturing Processes, 2011

In this research article, Taguchi L18 orthogonal array has been employed for depositing electro-c... more In this research article, Taguchi L18 orthogonal array has been employed for depositing electro-conductive coatings by varying process and material parameters, i.e., type of powder feeding arrangement, substrate material, stagnation gas temperature, stagnation gas pressure, and standoff distance. The response parameter of the low-pressure cold spray coatings produced is measured in terms of coating density. The analyses of the raw data and signal–to-noise (S/N) ratio of the response parameters have been performed using analysis of variance (ANOVA). The optimum parameters are predicted on the basis of analyses of the raw data and S/N ratio. It was found that the experimental conditions that provide better coating density are expected to also show a strong S/N ratio. The percentage contribution of the various parameters in regard to coating density as response parameter has also been predicted. The significant parameters in order of their decreasing percentage contribution are: substrate material, standoff distance, stagnation temperature, stagnation pressure of the carrier gas, and feed arrangement of powder particles, respectively.

Materials and Manufacturing Processes, 2012

In this research article, Taguchi L18 orthogonal array has been employed for depositing electro-c... more In this research article, Taguchi L18 orthogonal array has been employed for depositing electro-conductive coatings by varying process and material parameters, i.e., type of powder feeding arrangement, substrate material, stagnation gas temperature, stagnation gas pressure, and standoff distance. The response parameter of the low-pressure cold spray coatings produced is measured in terms of coating density. The analyses of the raw data and signal–to-noise (S/N) ratio of the response parameters have been performed using analysis of variance (ANOVA). The optimum parameters are predicted on the basis of analyses of the raw data and S/N ratio. It was found that the experimental conditions that provide better coating density are expected to also show a strong S/N ratio. The percentage contribution of the various parameters in regard to coating density as response parameter has also been predicted. The significant parameters in order of their decreasing percentage contribution are: substrate material, standoff distance, stagnation temperature, stagnation pressure of the carrier gas, and feed arrangement of powder particles, respectively.

Materials and Manufacturing Processes, 2012

In this article, Taguchi design of experiments L 18 orthogonal array have been adopted for making... more In this article, Taguchi design of experiments L 18 orthogonal array have been adopted for making the electro-conductive coatings. Process parameters selected for this study are: substrate material, type of powder feeding arrangement, stagnation gas temperature, stagnation gas pressure, and standoff distance. The response parameter of cold spray coatings produced is measured in terms of coating thickness. The analyses of the raw data and Signal-to-Noise (S/N) ratio of the response parameters have been performed using analysis of variance (ANOVA). The optimum process parameters are predicted on the basis of analyses of the raw data and S/N ratio. The percentage contribution of the various process parameters with reference to coating thickness as response has been predicted. The significant process parameters in decreasing order of their contribution are: standoff distance, stagnation gas temperature, substrate material, stagnation pressure of the carrier gas, and feed arrangement of the powder particles.

Materials and Manufacturing Processes, 2011

In this article, Taguchi design of experiments L 18 orthogonal array have been adopted for making... more In this article, Taguchi design of experiments L 18 orthogonal array have been adopted for making the electro-conductive coatings. Process parameters selected for this study are: substrate material, type of powder feeding arrangement, stagnation gas temperature, stagnation gas pressure, and standoff distance. The response parameter of cold spray coatings produced is measured in terms of coating thickness. The analyses of the raw data and Signal-to-Noise (S/N) ratio of the response parameters have been performed using analysis of variance (ANOVA). The optimum process parameters are predicted on the basis of analyses of the raw data and S/N ratio. The percentage contribution of the various process parameters with reference to coating thickness as response has been predicted. The significant process parameters in decreasing order of their contribution are: standoff distance, stagnation gas temperature, substrate material, stagnation pressure of the carrier gas, and feed arrangement of the powder particles.

Sexually Transmitted Infections, 2005

for 3 weeks, while patient 1 received doxycycline for 1 week only.

BMC Infectious Diseases, 2004

Background Literature on the spectrum of opportunistic disease in human immunodeficiency virus (H... more Background Literature on the spectrum of opportunistic disease in human immunodeficiency virus (HIV)-infected patients from developing countries is sparse. The objective of this study was to document the spectrum and determine the frequency of various opportunistic infections (OIs) and non-infectious opportunistic diseases, in hospitalised HIV-infected patients from north India. Methods One hundred and thirty five consecutive, HIV-infected patients (age 34 ± 10 years, females 17%) admitted to a tertiary care hospital in north India, for the evaluation and management of an OI or HIV-related disorder between January 2000 and July 2003, were studied. Results Fever (71%) and weight loss (65%) were the commonest presenting symptoms. Heterosexual transmission was the commonest mode of HIV-acquisition. Tuberculosis (TB) was the commonest OI (71%) followed by candidiasis (39.3%), Pneumocystis jiroveci pneumonia (PCP) (7.4%), cryptococcal meningitis and cerebral toxoplasmosis (3.7% each). Most of the cases of TB were disseminated (64%). Apart from other well-recognised OIs, two patients had visceral leishmaniasis. Two cases of HIV-associated lymphoma were encountered. CD4+ cell counts were done in 109 patients. Majority of the patients (82.6%) had CD4+ counts <200 cells/μL. Fifty patients (46%) had CD4+ counts <50 cells/μL. Only 50 patients (37%) received antiretroviral therapy. Twenty one patients (16%) died during hospital stay. All but one deaths were due to TB (16 patients; 76%) and PCP (4 patients; 19%). Conclusions A wide spectrum of disease, including both OIs and non-infectious opportunistic diseases, is seen in hospitalised HIV-infected patients from north India. Tuberculosis remains the most common OI and is the commonest cause of death in these patients.

Chinese Journal of Traumatology (english Edition), 2011

Traumatic posterior dislocation of hip associated with ipsilateral displaced femoral neck fractur... more Traumatic posterior dislocation of hip associated with ipsilateral displaced femoral neck fracture is a rare injury. Moreover, the management of such patients evokes strong views regarding primary replacement or preserving the femoral head. We presented a case of young adult with such an injury. He was operated upon with reduction of the dislocation and fixation of femoral neck fracture with the help of cancellous screws. Two years later, the fracture had united and the patient was asymptomatic. We further proposed the mechanism of injury for such a fracture and discussed the management in the changing trauma scenario of the developing world.

Materials and Manufacturing Processes, 2011

In this research article, Taguchi L18 orthogonal array has been employed for depositing electro-c... more In this research article, Taguchi L18 orthogonal array has been employed for depositing electro-conductive coatings by varying process and material parameters, i.e., type of powder feeding arrangement, substrate material, stagnation gas temperature, stagnation gas pressure, and standoff distance. The response parameter of the low-pressure cold spray coatings produced is measured in terms of coating density. The analyses of the raw data and signal–to-noise (S/N) ratio of the response parameters have been performed using analysis of variance (ANOVA). The optimum parameters are predicted on the basis of analyses of the raw data and S/N ratio. It was found that the experimental conditions that provide better coating density are expected to also show a strong S/N ratio. The percentage contribution of the various parameters in regard to coating density as response parameter has also been predicted. The significant parameters in order of their decreasing percentage contribution are: substrate material, standoff distance, stagnation temperature, stagnation pressure of the carrier gas, and feed arrangement of powder particles, respectively.

Materials and Manufacturing Processes, 2012

In this research article, Taguchi L18 orthogonal array has been employed for depositing electro-c... more In this research article, Taguchi L18 orthogonal array has been employed for depositing electro-conductive coatings by varying process and material parameters, i.e., type of powder feeding arrangement, substrate material, stagnation gas temperature, stagnation gas pressure, and standoff distance. The response parameter of the low-pressure cold spray coatings produced is measured in terms of coating density. The analyses of the raw data and signal–to-noise (S/N) ratio of the response parameters have been performed using analysis of variance (ANOVA). The optimum parameters are predicted on the basis of analyses of the raw data and S/N ratio. It was found that the experimental conditions that provide better coating density are expected to also show a strong S/N ratio. The percentage contribution of the various parameters in regard to coating density as response parameter has also been predicted. The significant parameters in order of their decreasing percentage contribution are: substrate material, standoff distance, stagnation temperature, stagnation pressure of the carrier gas, and feed arrangement of powder particles, respectively.

Materials and Manufacturing Processes, 2012

In this article, Taguchi design of experiments L 18 orthogonal array have been adopted for making... more In this article, Taguchi design of experiments L 18 orthogonal array have been adopted for making the electro-conductive coatings. Process parameters selected for this study are: substrate material, type of powder feeding arrangement, stagnation gas temperature, stagnation gas pressure, and standoff distance. The response parameter of cold spray coatings produced is measured in terms of coating thickness. The analyses of the raw data and Signal-to-Noise (S/N) ratio of the response parameters have been performed using analysis of variance (ANOVA). The optimum process parameters are predicted on the basis of analyses of the raw data and S/N ratio. The percentage contribution of the various process parameters with reference to coating thickness as response has been predicted. The significant process parameters in decreasing order of their contribution are: standoff distance, stagnation gas temperature, substrate material, stagnation pressure of the carrier gas, and feed arrangement of the powder particles.

Materials and Manufacturing Processes, 2011

In this article, Taguchi design of experiments L 18 orthogonal array have been adopted for making... more In this article, Taguchi design of experiments L 18 orthogonal array have been adopted for making the electro-conductive coatings. Process parameters selected for this study are: substrate material, type of powder feeding arrangement, stagnation gas temperature, stagnation gas pressure, and standoff distance. The response parameter of cold spray coatings produced is measured in terms of coating thickness. The analyses of the raw data and Signal-to-Noise (S/N) ratio of the response parameters have been performed using analysis of variance (ANOVA). The optimum process parameters are predicted on the basis of analyses of the raw data and S/N ratio. The percentage contribution of the various process parameters with reference to coating thickness as response has been predicted. The significant process parameters in decreasing order of their contribution are: standoff distance, stagnation gas temperature, substrate material, stagnation pressure of the carrier gas, and feed arrangement of the powder particles.

Sexually Transmitted Infections, 2005

for 3 weeks, while patient 1 received doxycycline for 1 week only.

BMC Infectious Diseases, 2004

Background Literature on the spectrum of opportunistic disease in human immunodeficiency virus (H... more Background Literature on the spectrum of opportunistic disease in human immunodeficiency virus (HIV)-infected patients from developing countries is sparse. The objective of this study was to document the spectrum and determine the frequency of various opportunistic infections (OIs) and non-infectious opportunistic diseases, in hospitalised HIV-infected patients from north India. Methods One hundred and thirty five consecutive, HIV-infected patients (age 34 ± 10 years, females 17%) admitted to a tertiary care hospital in north India, for the evaluation and management of an OI or HIV-related disorder between January 2000 and July 2003, were studied. Results Fever (71%) and weight loss (65%) were the commonest presenting symptoms. Heterosexual transmission was the commonest mode of HIV-acquisition. Tuberculosis (TB) was the commonest OI (71%) followed by candidiasis (39.3%), Pneumocystis jiroveci pneumonia (PCP) (7.4%), cryptococcal meningitis and cerebral toxoplasmosis (3.7% each). Most of the cases of TB were disseminated (64%). Apart from other well-recognised OIs, two patients had visceral leishmaniasis. Two cases of HIV-associated lymphoma were encountered. CD4+ cell counts were done in 109 patients. Majority of the patients (82.6%) had CD4+ counts <200 cells/μL. Fifty patients (46%) had CD4+ counts <50 cells/μL. Only 50 patients (37%) received antiretroviral therapy. Twenty one patients (16%) died during hospital stay. All but one deaths were due to TB (16 patients; 76%) and PCP (4 patients; 19%). Conclusions A wide spectrum of disease, including both OIs and non-infectious opportunistic diseases, is seen in hospitalised HIV-infected patients from north India. Tuberculosis remains the most common OI and is the commonest cause of death in these patients.