Designing a Motivation Intervention in College Calculus

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/148297/1/Enes-RCMLPresentation.pd

Students’ Engagement with the Science and Engineering Integrated Calculus Tasks

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/147441/1/PMENA2017_FinalVersion.pd

Using Area Models to Visualize the Difference of Squares

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/147440/1/Akbuga-Hurdle_2018-ACTM.pd

Obtaining of motion equations about rheonomic mechanical systems

Fen Bilimleri Enstitüsü, Matematik Ana Bilim DalıBu çalışmada, zamana bağlı hareket denklemleri için çok kullanışlı olan Lagrangian ve Hamiltonian matematiksel modellemelerini kullanarak tanjant, kompleks ve parakompleks yapılı rheonomic mekanik sistemlere ait hareket denklemleri elde edilecektir. Elde edilen hareket denklemlerin çözümü sembolik hesaplama ile yapılacaktır. Ayrıca, rheonomic mekanik sistemlere ait bazı sonuçlar verilecektir. Anahtar sözcükler: Rheonomic Mekanik Sistemler, Lagrangian ve Hamiltonian Formalizmi, Euler-Lagrange Denklemleri, Hamilton DenklemleriIn this study, it will be obtained equations of motion about rheonomic mechanical systems having tangent, complex and paracomplex structure using Lagrangian and Hamiltonian mathematical modeling which is very useful for time-dependent equations. The solution of the obtained motion equations will be made by a sembolic calculation. Also, some results about rheonomic mechanical systems will be given. Keywords: Rheonomic Mechanical Systems, Lagrangian and Hamiltonian Formalism, Euler-Lagrange Equations, Hamilton Equation

Biodegradable Chitosan-Based Ambroxol Hydrochloride Microspheres: Effect of Cross-Linking Agents

The objective of this study was to investigate the influence of type of cross-linking method used on the properties of ambroxol hydrochloride microspheres such as encapsulation efficiency, particle size, and drug release. Microspheres were prepared by solvent evaporation technique using chitosan as a matrix-forming agent and cross-linked using formaldehyde and heat treatment. Morphological and physicochemical properties of microspheres were then investigated by scanning electron microscopy (SEM), X-ray diffractometry (XRD), differential scanning calorimetry (DSC), and Fourier-transform infrared spectroscopy (FTIR) spectroscopy. The cross-linking of chitosan takes place at the free amino group because of formation of imine bond as evidenced by FTIR. The DSC, XRD, and FTIR analysis showed that chitosan microspheres cross linked by heating were superior in properties and performance as compared to the microspheres cross-linked using formaldehyde. SEM results revealed that heat-treated microspheres were spherical, discrete having smooth, and porous structure. The particle size and encapsulation efficiencies of the prepared chitosan microspheres ranged between 10.83–24.11 μm and 39.73μ80.56%, respectively. The drug release was extended up to 12 h, and the kinetics of the drug release was obeying Higuchi kinetic proving diffusion-controlled drug release

Point-of-Care Emergency Ultrasonography in Non-Traumatic Cardiac Arrest and Near-Arrest Emergency Patients; A Pilot Trial

Background: In this study, we evaluated the applicability and interpretation of point-of-care emergency ultrasound (POCEUS) performed by an emergency physician (EP) in non-traumatic adult cardiac arrest and near-arrest patients at presentation to the Emergency Department (ED).   Methods: POCEUS was performed in 5 steps on 73 adults to assess; 1. Qualitative global cardiac function, cardiac chambers and presence of pericardial effusion; 2. Presence of pleural sliding, B-lines, A-lines or consolidation on anterior-superior; 3. Presence of an abdominal aorta aneurysm and pelvic free fluid; 4. Presence of pleural effusion, consolidation, free fluid on lateral-inferior; 5. Qualitative width and collapsibility of the inferior vena cava. A fulfilled checklist and real-time images of ultrasonography were sent by WhatsApp to the head of the study to generate the evidence and collect the data. The process of patient care, in-hospital diagnosis and survival were retrieved from digital hospital records. This prospective multicenter sample study was conducted from November 16, 2015, to January 5, 2016.   Results: The most common findings of POCEUS were performed and interpreted to have a first prediction of patients’ acute clinic problem by EPs were compatible with global systolic dysfunction (n = 16, 22.9%), pulmonary edema (n = 17, 23.3%), pulmonary embolus (n = 6, 8.2%), distributive/hypovolemic shock (n = 12, 16.4%), cardiac tamponade or pericardial effusion (n = 5, 6.8%), and pneumonia (n = 31, 42.5%) at presentation. The kappa correlation coefficient value of the POCEUS at presentation versus the final, traditional clinical diagnosis of the admitted ward, was 0.773 (95% CI, 0.747–0.892; p = 0.064, McNemar).   Conclusions: POCEUS performed by an EP at presentation had a good agreement between in qualitative prediction of the first differential diagnosis in life-threatened patients and the last diagnosis obtained during hospitalization. Furthermore, this study showed the requirement of evidence in comparison of measurements to the qualitative manner and new descriptive processes in POCEUS for unexplained situations and questions