Resumen. Los criterios diagnósticos para el trastorno por déficit de atención/hiperactividad (TDA... more Resumen. Los criterios diagnósticos para el trastorno por déficit de atención/hiperactividad (TDAH) fueron definidos por la clasificación estadística de las enfermedades mentales propuestas por el consenso de la Asociación Americana de Psiquiatría en el Manual diagnóstico y estadístico de los trastornos mentales, cuarta edición (DSM
Se utilizaron 3 grupos de 10 perros cada uno infectados en la forma natural con Ancylostoma canin... more Se utilizaron 3 grupos de 10 perros cada uno infectados en la forma natural con Ancylostoma caninum para valorar el efecto del *Cambendazole o Isopropil 2(4-Thiazolil) 5-bencimidazol carbamato, a dosis de 40, 60 y 100 mg/kg, de cada grupo; la mitad actuo como testigo de la dosis correspondiente. La efectividad de la droga fue de 66.2, 16.4 y 70% respectivamente. El comportamiento del compuesto no fue satisfactorio contra la Ancilostomiasis canina.
This paper describes the fabrication and characterization of multimode polymer optical waveguides... more This paper describes the fabrication and characterization of multimode polymer optical waveguides ob- tained using a SU-8-2005 polymer by means of photolithographic process. Critical information about refractive index modulation of polymer waveguides as function of fabrication parameters as pre-baked and ultraviolet exposure times is presented. Physical properties of the waveguides were determined by means prism-coupling technique, optical and SEM microscopy.
In this chapter, we present information about the design, fabrication and characterization of opt... more In this chapter, we present information about the design, fabrication and characterization of optical waveguides obtained by using a protocol of multiple energy ion implantations. This protocol must provide an approach to produce optical waveguides with adequate features, such as dimensions, evanescent field and optical confinement. In general, optical waveguides can be improved by widening the optical barrier or waveguide core through multiple energy ion implantations. Design of optical waveguides must consider effects induced by the ion implantation process, such as modification of substrate density, polarizability and structure. Information will be presented about optical waveguides formed mainly in laser crystals (i.e., Nd:YAG, Nd:YVO 4) using light ions such as H and He+ and heavy ions such as C 2 +. In general, these ions decrease the refractive index in the implanted area, producing a barrier that permits guiding in the region near the surface. Furthermore, information about nonlinear optical properties of channel waveguides containing metallic nanoparticles is presented. Composite materials containing metallic nanoparticles embedded in a dielectric matrix such as silica possess interesting properties due to surface plasmon resonance absorption features and the enhancement of the third-order nonlinear optical response. Therefore, nonlinear optical properties in composite waveguides can be used in all-optical switching devices.
Background: Acetabular fractures account for 10% of pelvis injuries, which are especially difficu... more Background: Acetabular fractures account for 10% of pelvis injuries, which are especially difficult to treat in developing countries with less access to resources. 3D printing has previously been shown to be a beneficial method of surgical planning, however the steep initial costs associated with purchasing a 3D printer may prevent some facilities form utilizing this technique. The purpose of this study was to develop 3D printed models for acetabular surgery using methodologies of varying cost to determine differences in model accuracy and overall quality. Methods: Five acetabular fracture models were developed from de-identified CT data using (I) proprietary and open-source segmentation software and (II) fused deposition modeling (FDM) and stereolithography (SLA) 3D printing methods. The distance between the posterior inferior iliac spine (PIIS) and the ischial spine as well as a unique fracture fragment for each model was compared between the different printing methodologies. The models were then given to 5 physicians and assessed on their overall accuracy compared to traditional 2D images. Results: Printing methodology did not affect the distance from PIIS to ischial spine (P=0.263). However, fracture fragment representation differed across 3D printed models, with the most accurate model produced by the high-end resin-based printer (P=0.007). The survey analysis showed that the low-cost printing methods produced models that were not as accurate in their representation of the fractured region (P=0.008). Conclusions: The differences between models developed using traditional methods and low-cost methods have slight differences but may still provide useful information when developing a surgical plan.
Journal of NeuroEngineering and Rehabilitation, 2021
Background The purpose of the current study was to determine the influence of upper-limb prosthes... more Background The purpose of the current study was to determine the influence of upper-limb prostheses on brain activity and gross dexterity in children with congenital unilateral upper-limb reduction deficiencies (ULD) compared to typically developing children (TD). Methods Five children with ULD (3 boys, 2 girls, 8.76 ± 3.37 years of age) and five age- and sex-matched TD children (3 boys, 2 girls, 8.96 ± 3.23 years of age) performed a gross manual dexterity task (Box and Block Test) while measuring brain activity (functional near-infrared spectroscopy; fNIRS). Results There were no significant differences (p = 0.948) in gross dexterity performance between the ULD group with prosthesis (7.23 ± 3.37 blocks per minute) and TD group with the prosthetic simulator (7.63 ± 5.61 blocks per minute). However, there was a significant (p = 0.001) difference in Laterality Index (LI) between the ULD group with prosthesis (LI = − 0.2888 ± 0.0205) and TD group with simulator (LI = 0.0504 ± 0.0296) s...
Stroke has a large impact on disability and loss of motor function[1]. It can cause the affected ... more Stroke has a large impact on disability and loss of motor function[1]. It can cause the affected upper limb to become spastic with a predominantly flexor tone. Stroke patients have shown improvements in hand mobility through sensorimotor arm therapy[2]. However, therapy can be expensive, and many patients still lack function in their affected hand when rehabilitation is finished[3]. Wearable devices, such as exoskeletons are useful in that they offer the ability for patients to regain mobility in their own environment[2]. The upper limb exoskeletons are designed to interact independently with the user while assisting and promoting movement of the affected hand. Our inexpensive and simple exoskeleton design is produced on a low-cost 3D printer, and allows for patients to have access outside of the lab. It is important for this exoskeleton to not only be easily accessible, but effective and useful. Traditional definitions of usability incorporate effectiveness, efficiency, and satisfa...
INTRODUCTION Advancements in computer-aided design (CAD) programs and additive manufacturing (3D ... more INTRODUCTION Advancements in computer-aided design (CAD) programs and additive manufacturing (3D printing) offer the possibility of designing and printing customized upper-limb prostheses at a low cost. However, there is a lack of specific technical descriptions and clinical evidence supporting the use of 3D printed prostheses. The purpose of this investigation was to provide technical considerations and clinical evidence of the possible benefits and obstacles in the use of upper-limb 3D printed prostheses in pediatric populations. This information is crucial for clinicians interested in exploring the use of 3D printed prostheses for their patients.
Journal of neuroengineering and rehabilitation, Jan 8, 2018
Co-contraction is the simultaneous activation of agonist and antagonist muscles that produces for... more Co-contraction is the simultaneous activation of agonist and antagonist muscles that produces forces around a joint. It is unknown if the use of a wrist-driven 3D printed transitional prostheses has any influence on the neuromuscular motor control strategies of the affected hand of children with unilateral upper-limb reduction deficiencies. Thus, the purpose of the current investigation was to examine the coactivation index (CI) of children with congenital upper-limb reduction deficiencies before and after 6 months of using a wrist-driven 3D printed partial hand prosthesis. Electromyographic activity of wrist flexors and extensors (flexor carpi ulnaris and extensor digitorum) was recorded during maximal voluntary contraction of the affected and non-affected wrists. Co-contraction was calculated using the coactivation index and was expressed as percent activation of antagonist over agonist. Nine children (two girls and seven boys, 6 to 16 years of age) with congenital upper-limb defi...
Public reporting burden for this collection of information is estimated to average 1 hour per res... more Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.
2009 International Conference on Intelligent Sensors, Sensor Networks and Information Processing (ISSNIP), 2009
Digital Moorea is a collaborative vision of a coral reef ecosystem instrumented with real-time se... more Digital Moorea is a collaborative vision of a coral reef ecosystem instrumented with real-time sensors connected to high-performance backend resources and sophisticated client applications. It will be a living laboratory for long-term studies of marine ecology and a testbed for evolving technologies for environmental and biological sensing, communications, and analysis. A diverse team of ecologists, computer scientists, and engineers from the Marine Science Institute at the University of California Santa Barbara (MSI, www.msi.ucsb.edu/) and the California Institute of Telecommunications and Information Technology (CalIT2, www.calit2.net/) are collaborating to bring this vision to reality at the Moorea Coral Reef site (MCR LTER, www.mcr.lternet.edu) of the U.S. National Science Foundation's Long Term Ecological Research (LTER) program.
Public reporting burden for this collection of information is estimated to average 1 hour per res... more Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.
Latin America Optics and Photonics Conference, 2012
ABSTRACT In this work, we present a thermal distribution measurement and analysis on the surface ... more ABSTRACT In this work, we present a thermal distribution measurement and analysis on the surface area of a Ball Grid Array (BGA), soldered by means of a Focused Infrared Light Soldering System (FILSS), which meets the BGA surface mount device (SMD) reflow solder heating profile
Resumen. Los criterios diagnósticos para el trastorno por déficit de atención/hiperactividad (TDA... more Resumen. Los criterios diagnósticos para el trastorno por déficit de atención/hiperactividad (TDAH) fueron definidos por la clasificación estadística de las enfermedades mentales propuestas por el consenso de la Asociación Americana de Psiquiatría en el Manual diagnóstico y estadístico de los trastornos mentales, cuarta edición (DSM
Se utilizaron 3 grupos de 10 perros cada uno infectados en la forma natural con Ancylostoma canin... more Se utilizaron 3 grupos de 10 perros cada uno infectados en la forma natural con Ancylostoma caninum para valorar el efecto del *Cambendazole o Isopropil 2(4-Thiazolil) 5-bencimidazol carbamato, a dosis de 40, 60 y 100 mg/kg, de cada grupo; la mitad actuo como testigo de la dosis correspondiente. La efectividad de la droga fue de 66.2, 16.4 y 70% respectivamente. El comportamiento del compuesto no fue satisfactorio contra la Ancilostomiasis canina.
This paper describes the fabrication and characterization of multimode polymer optical waveguides... more This paper describes the fabrication and characterization of multimode polymer optical waveguides ob- tained using a SU-8-2005 polymer by means of photolithographic process. Critical information about refractive index modulation of polymer waveguides as function of fabrication parameters as pre-baked and ultraviolet exposure times is presented. Physical properties of the waveguides were determined by means prism-coupling technique, optical and SEM microscopy.
In this chapter, we present information about the design, fabrication and characterization of opt... more In this chapter, we present information about the design, fabrication and characterization of optical waveguides obtained by using a protocol of multiple energy ion implantations. This protocol must provide an approach to produce optical waveguides with adequate features, such as dimensions, evanescent field and optical confinement. In general, optical waveguides can be improved by widening the optical barrier or waveguide core through multiple energy ion implantations. Design of optical waveguides must consider effects induced by the ion implantation process, such as modification of substrate density, polarizability and structure. Information will be presented about optical waveguides formed mainly in laser crystals (i.e., Nd:YAG, Nd:YVO 4) using light ions such as H and He+ and heavy ions such as C 2 +. In general, these ions decrease the refractive index in the implanted area, producing a barrier that permits guiding in the region near the surface. Furthermore, information about nonlinear optical properties of channel waveguides containing metallic nanoparticles is presented. Composite materials containing metallic nanoparticles embedded in a dielectric matrix such as silica possess interesting properties due to surface plasmon resonance absorption features and the enhancement of the third-order nonlinear optical response. Therefore, nonlinear optical properties in composite waveguides can be used in all-optical switching devices.
Background: Acetabular fractures account for 10% of pelvis injuries, which are especially difficu... more Background: Acetabular fractures account for 10% of pelvis injuries, which are especially difficult to treat in developing countries with less access to resources. 3D printing has previously been shown to be a beneficial method of surgical planning, however the steep initial costs associated with purchasing a 3D printer may prevent some facilities form utilizing this technique. The purpose of this study was to develop 3D printed models for acetabular surgery using methodologies of varying cost to determine differences in model accuracy and overall quality. Methods: Five acetabular fracture models were developed from de-identified CT data using (I) proprietary and open-source segmentation software and (II) fused deposition modeling (FDM) and stereolithography (SLA) 3D printing methods. The distance between the posterior inferior iliac spine (PIIS) and the ischial spine as well as a unique fracture fragment for each model was compared between the different printing methodologies. The models were then given to 5 physicians and assessed on their overall accuracy compared to traditional 2D images. Results: Printing methodology did not affect the distance from PIIS to ischial spine (P=0.263). However, fracture fragment representation differed across 3D printed models, with the most accurate model produced by the high-end resin-based printer (P=0.007). The survey analysis showed that the low-cost printing methods produced models that were not as accurate in their representation of the fractured region (P=0.008). Conclusions: The differences between models developed using traditional methods and low-cost methods have slight differences but may still provide useful information when developing a surgical plan.
Journal of NeuroEngineering and Rehabilitation, 2021
Background The purpose of the current study was to determine the influence of upper-limb prosthes... more Background The purpose of the current study was to determine the influence of upper-limb prostheses on brain activity and gross dexterity in children with congenital unilateral upper-limb reduction deficiencies (ULD) compared to typically developing children (TD). Methods Five children with ULD (3 boys, 2 girls, 8.76 ± 3.37 years of age) and five age- and sex-matched TD children (3 boys, 2 girls, 8.96 ± 3.23 years of age) performed a gross manual dexterity task (Box and Block Test) while measuring brain activity (functional near-infrared spectroscopy; fNIRS). Results There were no significant differences (p = 0.948) in gross dexterity performance between the ULD group with prosthesis (7.23 ± 3.37 blocks per minute) and TD group with the prosthetic simulator (7.63 ± 5.61 blocks per minute). However, there was a significant (p = 0.001) difference in Laterality Index (LI) between the ULD group with prosthesis (LI = − 0.2888 ± 0.0205) and TD group with simulator (LI = 0.0504 ± 0.0296) s...
Stroke has a large impact on disability and loss of motor function[1]. It can cause the affected ... more Stroke has a large impact on disability and loss of motor function[1]. It can cause the affected upper limb to become spastic with a predominantly flexor tone. Stroke patients have shown improvements in hand mobility through sensorimotor arm therapy[2]. However, therapy can be expensive, and many patients still lack function in their affected hand when rehabilitation is finished[3]. Wearable devices, such as exoskeletons are useful in that they offer the ability for patients to regain mobility in their own environment[2]. The upper limb exoskeletons are designed to interact independently with the user while assisting and promoting movement of the affected hand. Our inexpensive and simple exoskeleton design is produced on a low-cost 3D printer, and allows for patients to have access outside of the lab. It is important for this exoskeleton to not only be easily accessible, but effective and useful. Traditional definitions of usability incorporate effectiveness, efficiency, and satisfa...
INTRODUCTION Advancements in computer-aided design (CAD) programs and additive manufacturing (3D ... more INTRODUCTION Advancements in computer-aided design (CAD) programs and additive manufacturing (3D printing) offer the possibility of designing and printing customized upper-limb prostheses at a low cost. However, there is a lack of specific technical descriptions and clinical evidence supporting the use of 3D printed prostheses. The purpose of this investigation was to provide technical considerations and clinical evidence of the possible benefits and obstacles in the use of upper-limb 3D printed prostheses in pediatric populations. This information is crucial for clinicians interested in exploring the use of 3D printed prostheses for their patients.
Journal of neuroengineering and rehabilitation, Jan 8, 2018
Co-contraction is the simultaneous activation of agonist and antagonist muscles that produces for... more Co-contraction is the simultaneous activation of agonist and antagonist muscles that produces forces around a joint. It is unknown if the use of a wrist-driven 3D printed transitional prostheses has any influence on the neuromuscular motor control strategies of the affected hand of children with unilateral upper-limb reduction deficiencies. Thus, the purpose of the current investigation was to examine the coactivation index (CI) of children with congenital upper-limb reduction deficiencies before and after 6 months of using a wrist-driven 3D printed partial hand prosthesis. Electromyographic activity of wrist flexors and extensors (flexor carpi ulnaris and extensor digitorum) was recorded during maximal voluntary contraction of the affected and non-affected wrists. Co-contraction was calculated using the coactivation index and was expressed as percent activation of antagonist over agonist. Nine children (two girls and seven boys, 6 to 16 years of age) with congenital upper-limb defi...
Public reporting burden for this collection of information is estimated to average 1 hour per res... more Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.
2009 International Conference on Intelligent Sensors, Sensor Networks and Information Processing (ISSNIP), 2009
Digital Moorea is a collaborative vision of a coral reef ecosystem instrumented with real-time se... more Digital Moorea is a collaborative vision of a coral reef ecosystem instrumented with real-time sensors connected to high-performance backend resources and sophisticated client applications. It will be a living laboratory for long-term studies of marine ecology and a testbed for evolving technologies for environmental and biological sensing, communications, and analysis. A diverse team of ecologists, computer scientists, and engineers from the Marine Science Institute at the University of California Santa Barbara (MSI, www.msi.ucsb.edu/) and the California Institute of Telecommunications and Information Technology (CalIT2, www.calit2.net/) are collaborating to bring this vision to reality at the Moorea Coral Reef site (MCR LTER, www.mcr.lternet.edu) of the U.S. National Science Foundation's Long Term Ecological Research (LTER) program.
Public reporting burden for this collection of information is estimated to average 1 hour per res... more Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.
Latin America Optics and Photonics Conference, 2012
ABSTRACT In this work, we present a thermal distribution measurement and analysis on the surface ... more ABSTRACT In this work, we present a thermal distribution measurement and analysis on the surface area of a Ball Grid Array (BGA), soldered by means of a Focused Infrared Light Soldering System (FILSS), which meets the BGA surface mount device (SMD) reflow solder heating profile
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