Controlling Melting Phase Change Simulations

I have developed a set of Houdini Digital Assets (HDA) to control phase change in materials that melt. Examples of real world materials that exhibit these phenomena include melting candles, molten steel, etc. The purpose of this tool is to provide artistic user control when animating these materials. The user can provide an object model as an input to the HDA, which can then be split into multiple sections as per the user’s needs. The user can then specify attributes such as temperature, viscosity, and a melting rate for each section. The object is then filled with particles to resemble a particle based fluid object, with each particle inheriting the attributes of the section it belongs to. When the simulation is run, two conditions control the behavior of the phase change at each timestep. First, the particles melt only at the rate specified for their section. Second, the particles from one section do not mix with those from another section. These conditions are implemented using custom digital assets in Houdini that I developed. Once the simulation is complete, the user is able to combine the deformed meshes of each section into a unified animated mesh and proceed with shading, lighting, and rendering

Value creation by Turkish enterprises

This study focuses on the resurgence of the automotive and appliance sectors in Turkey’s recent years. The analysis of both these sectors reveals some interesting lessons about technology management and investment strategies for companies to invest in Turkey. We discuss the major changes and project the future in both industries. Turkey seems to be a clear winner though there are some factors that could reverse the trend. The research is a joint field study partne rship between Carnegie Mellon and Sabanci Universities

Prevalence of voiding and defecatory dysfunction in postmenopausal women with pelvic organ prolapse: a prospective observational study

Background: Primary objective of this work was to study the prevalence of voiding and defecatory dysfunction in women with pelvic organ prolapse and correlate the stage and compartment of prolapse with voiding and defecatory dysfunction. The secondary objective was to correlate stage of prolapse with flow rate and post void residue and to study the voiding dysfunction in pelvic organ prolapse.Methods: A prospective observational cohort study in 120 post-menopausal women scheduled for vaginal hysterectomy pelvic floor repair. Short form of pelvic floor distress inventory (PFDI-20) and International prostate symptom questionnaire I-PSS score for Lower urinary tract symptoms (LUTS)was employed.Results: The prevalence of voiding dysfunction in this study was 78% and defecatory dysfunction was 77%. Higher stage of prolapse had significant correlation with voiding dysfunction. (P value was 0.028). Women with posterior compartment defect had more voiding dysfunction with the significant P value (p value was 0.04). Pre-operative voiding dysfunction resolved post operatively in 86%, the p<0.000 which was highly significant.Conclusions: Women with pelvic organ prolapse had high prevalence of voiding and defecatory dysfunction. Stages of prolapse have positive correlation with voiding dysfunction. Pre-operative voiding dysfunction resolved after vaginal hysterectomy and pelvic floor repair

Post void residue in women with pelvic organ prolapse: a prospective observational study

Background: The objective of the present study was to observe the post void residual volume (PVRV) in women with pelvic organ prolapse (POP) pre and postoperatively and to correlate stage of prolapse with lower urinary tract symptoms and quality of life in women with pelvic organ prolapse.Methods: This is a prospective observational cohort study of 100 women with symptomatic pelvic organ prolapse of stage II or greater. Patients were admitted for Vaginal hysterectomy with pelvic floor repair for pelvic organ prolapse in Gynaecology Department at Christian Medical College Hospital, Vellore, India over one year were recruited. This study was approved by the institutional review board and ethical committee of the hospital. Pre- and post-operative PVR were measured. The statistical analysis was done by using SPSS version 21 and P value < 0.05 was considered as statistically significant.Results: In this study 100 patients were recruited and 11% of women had pre-operative high post void residual volume of more than 100 ml. Stages of POP did not correlate with severity of LUTS and QOL. Pre-operative elevated PVR resolved post operatively in 91%, the P value <0.000 which was highly significant.Conclusions: 11% of women had preoperative high PVR. Stages of POP did not correlate with severity of lower urinary tract symptoms (LUTS) and quality of life(QOL). Pre-operative elevated PVR resolved post operatively in 91%, the P value < 0.000 which was highly significant. Majority of the patient with severe pelvic organ prolapse had elevated pre-op PVR which resolved post- operatively after surgical correction

Controlling Melting Phase Change Simulations

I have developed a set of Houdini Digital Assets (HDA) to control phase change in materials that melt. Examples of real world materials that exhibit these phenomena include melting candles, molten steel, etc. The purpose of this tool is to provide artistic user control when animating these materials. The user can provide an object model as an input to the HDA, which can then be split into multiple sections as per the user’s needs. The user can then specify attributes such as temperature, viscosity, and a melting rate for each section. The object is then filled with particles to resemble a particle based fluid object, with each particle inheriting the attributes of the section it belongs to. When the simulation is run, two conditions control the behavior of the phase change at each timestep. First, the particles melt only at the rate specified for their section. Second, the particles from one section do not mix with those from another section. These conditions are implemented using custom digital assets in Houdini that I developed. Once the simulation is complete, the user is able to combine the deformed meshes of each section into a unified animated mesh and proceed with shading, lighting, and rendering