Design and fabrication of a polymer micro ring resonator with laser beam direct write lithography technique

In this article, we describe our work on design and fabrication of a polymer Micro Ring Resonator. This device has been constructed by laser beam direct write lithography technique (LBL).We used ORMOCORE photoresist for fabricating a micro ring resonator due to its very low losses at wavelengths 1550 nm and 1300 nm and also used a tapered fiber to couple light into the bus waveguide and received the signal from the output port of the waveguide by using another tapered fiber which the gap between bus waveguide and ring waveguide is then filled with nitrobenzene liquid by micropipette (which has large dependence of the refractive index on temperature) for increasing efficiently coupling to ring waveguide. The signal has been monitored by using an optical spectrum analyze .This micro ring resonator in the laterally coupled geometry for wavelength 1550 (nm) have band width (Δλ) 0.3 (nm), free spectral range of 0.8 (nm) and finesse of 2.6

Characterization of tribological behaviour of graphitic aluminum matrix composites, grey cast iron, and aluminum silicon alloys.

In recent years a number of aluminum-silicon alloys and some graphitic aluminum matrix composites have been fabricated for potential tribological applications in the automotive industry, in particular for lightweight high efficiency internal combustion engines to replace conventional uses of cast iron. This study provides a systematic investigation for wear mechanisms in dry sliding of the graphitic aluminum-matrix composites (A356 Al-10%SiC-4%Gr and A356 Al-5%Al2O3-3%Gr) developed for cylinder liner applications. Two eutectic Al-Si alloys (modified with rare earth elements) developed for wear resistant engine blocks were also studied. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2002 .R52. Source: Dissertation Abstracts International, Volume: 64-01, Section: B, page: 0372. Adviser: Ahmet Alpas. Thesis (Ph.D.)--University of Windsor (Canada), 2002

Microfluidics for Advanced Drug Delivery Systems.

Considerable efforts have been devoted towards developing effective drug delivery methods. Microfluidic systems, with their capability for precise handling and transport of small liquid quantities, have emerged as a promising platform for designing advanced drug delivery systems. Thus, microfluidic systems have been increasingly used for fabrication of drug carriers or direct drug delivery to a targeted tissue. In this review, the recent advances in these areas are critically reviewed and the shortcomings and opportunities are discussed. In addition, we highlight the efforts towards developing smart drug delivery platforms with integrated sensing and drug delivery components

Exploring Pedestrian Road Safety in Public Transit Locations

This thesis studies the magnitude of pedestrian road collisions in public transit locations and addresses how the road and built-environment elements affect pedestrian safety at public transit access points (PTAPs). Collision count models and hotspot identification methods are utilized to address the research questions. Chapter 1 and Chapter 2 provide an introduction and literature review over pedestrian road safety in general, and specifically in public transit locations. Chapter 3 explains the methodologies that will be utilized in this research study. Chapter 4 establishes a relationship between pedestrian-vehicle collision counts and public transit services. Pedestrian collisions occur more frequently at intersections with the presence of a PTAP and with a higher bus traffic volume, a higher number of bus routes, and a higher public transit accessibility index. Hence, Chapter 5, explores how road geometry and built environment elements affect pedestrian-vehicle collision counts at PTAPs. The analysis shows that strategies such as road narrowing, sidewalk width increase, median refuges, presence of signal’s walk interval, and vehicle stop signs could improve pedestrian safety at PTAPs. Moreover, pedestrians are at more risk in PTAP where there are roads with higher road grades and more two-way streets than one-way streets. Chapter 5 continues with Empirical Bayes collision hotspot identification and examines a couple of collision hotspots in PTAPs in the case study of Montreal City. The study findings point out the need to improve pedestrian road safety at PTAP locations and offer engineering countermeasures for addressing this problem

Prevalence of Psychiatric Disorders among Children and Adolescents: A Study from Khuzestan

  Objective This cross-sectional study aimed to study the prevalence rate of psychiatric disorders in children and adolescents in Khuzestan province. Materials & Methods A community sample consisting of 1028 (51.6% female) children and adolescents aged 6-18 years was selected using a multistage cluster sampling method. Data were gathered using the Kiddie-SADSPresent and Lifetime Version (K-SADS-PL) and a demographic questionnaire (i.e., gender, age, level of education, place of residence, parent’s education, and parent’s Job) Results Nearly 22.6% (22.3% of boys and 23% of girls) of all participants suffered from at least one psychiatric disorder. There was no significant difference in the prevalence of psychiatric disorders based on gender, age, father’s education, mother’s education, mother’s job, and father’s job (all p>0.05). Psychiatric disorders were significantlymore prevalent among children and adolescents in urban areas compared to rural places (2.9% vs. 8.1; p<0.001). The most prevalent category was anxiety disorders (15%). Also, the most common disorders were specific phobia (7%), separation anxiety disorder (6.3%), and enuresis (5.2%). The most common comorbid disorders were mood disorders and anxiety disorders (56.3%), followed by anxiety disorders and elimination disorders (32.1%). ConclusionPsychiatric conditions are prevalent in children and adolescents living in Khuzestanian. The study’s findings have important implications for providing effective psychiatric services.   &nbsp

A new homatropine potentiometric membrane sensor as a useful device for homatropine hydrobromide analysis in pharmaceutical formulation and urine: a computational study

Homatropine (Equipin, Isopto Homatropine) is an anticholinergic medication that inhibits muscarinic acetylcholine receptors and thus the parasympathetic nervous system. It is available as the hydrobromide or methylbromide salt. In this study, a potentiometric liquid membrane sensor for simple and fast determination of homatropine hydrobromide in pharmaceutical formulation and urine was constructed. For the membrane preparation, homatropine-tetraphenylborate complexes were employed as electroactive materials in the membrane. The proposed sensor presents wide linear range (10-5-10-1 mol L-1), low detection limit (8×10-6 mol L-1), and fast response time (ca. 10 s). Validation of the method shows suitability of the sensors for applicability in the quality control analysis of homatropine hydrobromide in pharmaceutical formulation and urine

Training the Spiritual Intelligence and Changing its' Components in Critical Care Nurses

Background and aims: Spiritual intelligence as a capability of behaving with sympathy and wise along with internal and external peace is the key part in confronting with stressor challenges in critical care units. Indeed, nurses can utilize that in the best way to manage stressful situations related to units and patients. Therefore, this study aimed to assess the effect of training on spiritual intelligence and its' components. Methods: This quasi-experimental was conducted on 82 nurses (40 nurses in experiment group and 42 nurses in control group). Sampling was done in convenience method in critical care units of affiliated hospitals to Lorestan University of Medical Sciences (Shahid Rahimi and Shahid Madani hospitals). King spiritual intelligence scale was used for data gathering which its validity and reliability were confirmed. This scale was fulfilled by participants three times (before study, immediately and one month after study). Eight training sessions was held for experimental group as a workshop. There wasn't any intervention for control group. Data were analyzed by using descriptive and inferential statistics and software SPSS15. (p=0.05) Results: The covariance analysis (by adjusting the effect of the base values of spiritual intelligence) showed that the main effect of intervention on the mean scores of spiritual intelligence was significant (p<0.05), so that after the study in the experimental group the mean scores of spiritual intelligence reached from 3.37 before the study to 78.50 after the study. Also, the covariance analysis revealed that the main effect of intervention on the mean scores of four dimensions of spiritual intelligence were significant (p<0.05), so that the training results in significant increase of the mean scores of them in the experimental group. Conclusions: Based on the results that the spiritual intelligence of nurses was at the medium level before training and the training of spiritual intelligence increased their spiritual intelligence, so by using protocols for educating and improving the spiritual intelligence in nurses, their stress in their work places and life would be reduced and finally the quality of care will be progressed. Keywords: Spiritual Intelligence, Training, Nurse, Critical Care Unit

An Inquiry Into the Patient Safety Management Patterns: A Review Study

Background and aims: Patient safety, as one of the main components of the health care quality, implies avoiding any injury and damage to the patient when providing health care services. In other words, patient safety means his or her safety against any adverse and harmful event when receiving health care services. Based on the above-mention explanations, the present study was conducted to determine the patterns of patient safety management. Methods: A systematic review method was used to meet the objectives of the study. In order to access the scientific documentation and evidence related to the subject published during 1998-2018, English keywords including “Patient Safety Model”, “Patient Safety”, and “Patient Safety of Management” were searched in Medine, PubMed, and Google Scholar databases and Persian versions of these keywords were also looked for in Jihad-e Daneshgahi’s Scientific Information Database (SID) and Iranian Journals database (Magiran). Results: The findings of this study suggested that most of the studies on designing a model for patient safety highlighted important dimensions including guidance and leadership, communication, organizing, information management, control and monitoring, participation and decision-making, as well as planning and coordination. Conclusion: In general, using patterns and frameworks designed for patient safety improves patient safety against uncertain incidents since the human and financial consequences of such incidents impose overwhelming sufferings on patients

An Inquiry into the Patient Safety Management Patterns: A Review Study

Background and aims: Patient safety, as one of the main components of the health care quality, implies avoiding any injury and damage to the patient when providing health care services. In other words, patient safety means his or her safety against any adverse and harmful event when receiving health care services. Based on the above-mention explanations, the present study was conducted to determine the patterns of patient safety management. Methods: A systematic review method was used to meet the objectives of the study. In order to access the scientific documentation and evidence related to the subject published during 1998-2018, English keywords including “Patient Safety Model”, “Patient Safety”, and “Patient Safety of Management” were searched in Medine, PubMed, and Google Scholar databases and Persian versions of these keywords were also looked for in Jihad-e Daneshgahi’s Scientific Information Database (SID) and Iranian Journals database (Magiran). Results: The findings of this study suggested that most of the studies on designing a model for patient safety highlighted important dimensions including guidance and leadership, communication, organizing, information management, control and monitoring, participation and decision-making, as well as planning and coordination. Conclusion: In general, using patterns and frameworks designed for patient safety improves patient safety against uncertain incidents since the human and financial consequences of such incidents impose overwhelming sufferings on patients. Keywords Inquiry, Pattern, Patient Safety