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Electronic Properties of p-Type δ-Doped GaAs Structure under Electric Field

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Chinese Physics Letters 2008年第4期25卷 1415-1418页

作者： emine ozturk Ismail SOKMEN Department of Physics Cumhuriyet University 58140 SIVAS Turkey Department of Physics Dokuzeylul University IZMIR Turkey

We theoretically investigate the electronic properties of p-type δ-doped GaAs inserted into a quantum well under the electric field, at T = 0 K. We will investigate the influence of the electric field on the δ-doping concentration for a uniform distribution. The depth of confining potential, the density profile, the Fermi level, the subband energies and the subband populations calculate by solving the Schrodinger and Poisson equations self consistently. It is found that the changes of the electronic properties are quite sensitive to the applied electric field and the doping concentration. As different from single n-type δ-doped structure, we see a replace between the ground light-hole （lh1 ） subband and the first excited heavy-hole （hh2） subband whenever the external electric field reaches a critical value. We find the abrupt changing of the subband energies and the subband populations whenever the applied electric field reaches a certain value. Also, it is found that the heavy-hole subbands contain many more energy states than the light-hole ones, the population of the heavy-hole levels represent approximately 91% of all the carriers.

关键词： supernova explosion proto-neutron star shock wave

Assessment of the implementation status of best available techniques for cleaner production in the textile industry

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Frontiers of Environmental Science & Engineering 2024年第8期18卷 133-148页

作者： Mehmet Eren Yaman Emrah ozturk Ulku Yetis Mehmet Kitis Department of Environmental Engineering Suleyman Demirel UniversityIsparta 32260Turkey Department of Environmental Protection Technologies Isparta University of Applied SciencesIsparta 32200Turkey Department of Environmental Engineering Middle East Technical UniversityAnkara 06800Turkey

The draft Integrated Pollution Prevention and Control(IPPC)regulation mandates compliance with best available techniques(BATs)for textile manufacturers.A study in Turkish textile facilities,covering 56 units across four sub-sectors,assessed the status of 488 BATs through on-site visits and *** aim was to gauge the sector’s adherence to *** findings revealed that 37% of surveyed BATs were fully implemented,rising to 88% when considering potential future *** suggests a strong industry inclination toward adopting BATs for cleaner production and *** study highlighted significant BAT-related investments in the textile sector,driven by environmental concerns,regulations,customer demands,resource efficiency,competition,and cost-benefit ***,the study results also indicated that there is still much work to do for the implementation of some *** was found that 60 BATs had lower implementation ratios(IR:0%-43%).Lower IR values for these BATs are mainly due to factors like specificity,high costs,long payback periods,operational difficulties,limited expertise,space constraints,customer requirements,quality concerns,operational issues,and sector-specific *** study recommends similar assessments in other European industrial sectors to evaluate compliance with mandatory BATs outlined in the Industrial Emissions *** insights from this study on the Turkish textile sector can serve as a valuable guide for future evaluations.

关键词： Best available techniques(BAT) Cleaner production Green Deal Integrated Pollution Prevention and Control(IPPC) Textile sector

Complementary comments on diagnosis,severity and prognosis prediction of acute pancreatitis

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World Journal of Gastroenterology 2024年第1期30卷 108-111页

作者： Muhsin Ozgun ozturk Sonay Aydin Department of Radiology Erzincan Binali Yildirim UniversityErzincan 24000Turkey

The radiological differential diagnosis of acute pancreatitis includes diffuse pancreatic lymphoma,diffuse autoimmune pancreatitis and groove located mass lesions that may mimic groove *** energy computed tomography and diffusion weighted magnetic resonance imaging are useful in the early diagnosis of acute pancreatitis,and dual energy computed tomography is also useful in severity assessment and prognosis *** off necrosis is an important complication in terms of prognosis,and it is important to know its radiological findings and distinguish it from pseudocyst.

关键词： Acute pancreatitis Computed tomography Diffusion weighted imaging Dual energy computed tomography Walled off necrosis

The Improving Effects of Diabetes Education on Diabetes Awareness and Management in Children and Adolescents with T1DM

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Open Journal of Nursing 2024年第4期14卷 164-175页

作者： Salah Alzawahreh Candan ozturk OR Department Arab Medical Center Amman Jordan Pediatric Nursing Department Near East University Faculty of Nursing Mersin T&#252rkiye

Background: Diabetes education is crucial in empowering persons with Type 1 diabetes (T1DM) and their families to properly manage the condition by providing comprehensive knowledge, tools, and support. It boosts one’s belief in their ability to succeed, encourages following medical advice, and adds to the general enhancement of health. Objective: This study is to investigate the effectiveness of diabetes education in empowering individuals with Type 1 Diabetes Mellitus (T1DM) and their families to effectively manage the condition. Furthermore, it strives to improve nursing care for families whose children have been diagnosed with Type 1 Diabetes Mellitus (T1DM). Design: This research study investigates the efficacy of diabetes education in empowering individuals with Type 1 Diabetes Mellitus (T1DM) and their families to effectively handle the condition. Materials and Methods: A systematic search was conducted between the years 2000 and 2022, utilizing the Medline and Google Scholar databases. The purpose of the search was to uncover relevant papers pertaining to diabetes education, management of Type 1 Diabetes Mellitus (T1DM), nurse care, and empowerment. The search focused on peer-reviewed research, clinical trials, and scholarly articles that evaluated the efficacy of diabetes education in empowering individuals and families. Results: Diabetes education is crucial for understanding and controlling T1DM. It includes personalized sessions, webinars, group classes, and clinics that provide customized therapies. Comprehensive education enhances glycemic control and family dynamics. Nevertheless, the implementation of diabetes education for families requires specific standards, especially in the field of nursing. Conclusion: Diabetes education is essential for effectively managing Type 1 Diabetes Mellitus (T1DM), providing patients and families with crucial knowledge, resources, and confidence. It encourages independence in-home care and provides explicit guidelines f

关键词： Diabetes Education Family-Centered Empowerment Model Self-Care Management Self-Efficacy Type 1 Diabetes (T1D)

Prothrombotic state and thrombotic events in COVID-19 pandemic period,including portal vein and splenic artery thromboses

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World Journal of Clinical Cases 2024年第33期12卷 6595-6603页

作者： Ozgur Karcioglu Canan Akman Göksu Afacan ozturk Department of Emergency Medicine University of Health SciencesIstanbul Education and Research HospitalIstanbul 34140BakırkoyTürkiye Department of Emergency Medicine Canakkale Onsekiz Mart UniversityCanakkale 17000ÇanakkaleTürkiye Department of Emergency Medicine Istanbul Aydin UniversityIstanbul 34295KucukcekmeceIstanbulTürkiye

This editorial article is intended to perform a discussion on the manuscript entitled“Simultaneous portal vein thrombosis and splenic vein thrombosis in a COVID-19 patient:A case report and review of literature”written by Abramowitz et *** article focuses on the diagnostic processes in a 77-year-old-male patient with a simultaneous portal vein and splenic artery thrombosis accompanying coronavirus disease 2019(COVID-19).The authors postulated that splanchnic thrombosis should be on the list of differential diagnoses in a patient presenting with abdominal pain in presence of a COVID-19 *** tendency for venous and arterial thrombosis in COVID-19 patients is encountered,largely attributed to *** general,venous thromboembolism mostly manifest as deep vein thrombosis(DVT),pulmonary embolism(PE)or catheterrelated thromboembolic *** PE,DVT,cerebrovascular events and myocardial infarction are seen as the most common thromboembolic complications in COVID-19 ***-19-associated hemostatic abnormalities include mild thrombocytopenia and increased D-dimer *** to other coagulopathies,the treatment of the underlying condition is the *** of antiplatelet agents can be considered in critically ill patients at low bleeding risk,not on therapeutic anticoagulation,and receiving gastric acid suppression Early administration of antithrombotic drugs will have a beneficial effect in both the prevention and treatment of thrombotic events,especially in non-ambulatory *** molecular weight heparin(LMWH)should be started if there is no contraindication,including in non-critical patients who are at risk of hospitalization LMWH(enoxaparin)is preferred to standard heparin.

关键词： Prothrombotic state Thrombotic events COVID-19 Pandemic Thromboembolism

Comparison of autofluorescence and optical coherence tomography findings in acute and chronic central serous chorioretinopathy

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International Journal of Ophthalmology(English edition) 2014年第2期7卷 350-354页

作者： Mehmet Yasin Teke Ufuk Elgin Pinar Nalcacioglu-Yuksekkaya emine Sen Pinar Ozdal Faruk ozturk Ulucanlar Eye Research Hospital

AIM:To discuss and compare the fundus autofluorescence(FAF)and optical coherence tomography(OCT)in acute or chronic central serous chorioretinopathy(CSCR).METHODS:Medical records of 100 cases of CSCR were *** and chronic cases were evaluated according to the duration of decreased visual acuity,serous retinal detachment(RD)and focal leakage on fluorescein angiography(FA).Chi-square test was used for statistical ***:Forty cases had acute and 60 cases had chronic *** showed focal hypo-autofluorescence in 34(85%)and iso-autofluorescence in 6(15%)of acute cases and hypo-autofluorescence in 51(85%),hyperautofluorescence in 6(10%)and iso-autofluorescence in3(5%)of chronic *** showed serous RD with distinct borders correlated with FAF findings(hypoautofluorescence)in all acute CSCR *** chronic CSCR group,OCT showed serous RD with indistinct borders correlated with FAF *** differences between the OCT and FAF findings of the two groups were significant(P=0.000).CONCLUSION:OCT and FAF findings can support the clinical observations in differential diagnosis of acute and chronic CSCR and help clinicians to evaluate retinal pigment epithelium,outer segments of photoreceptors and the components of serous RD.

关键词： central serous chorioretinopathy fluorescein angiography fundus autofluorescence optical coherence tomography

Fundus autofluorescence imaging of patients with idiopathic macular hole

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International Journal of Ophthalmology(English edition) 2013年第5期6卷 685-689页

作者： Mehmet Yasin Teke Pinar Cakar-Ozdal emine sen Ufuk Elgin Pinar Nalcacioglu-Yuksekkaya Faruk ozturk Ulucanlar Eye Research and Training Hospital

AIM:To investigate the role of fundus autofluo rescence(FAF) both in the diagnosis and the preoperative and postoperative evaluation of patients with idiopathic macular hole(MH).METHODS:Forty eyes of 40 patients diagnosed as idiopathic MH between May 2010 and May 2011 were included in this retrospective *** patients underwent full ophthalmologic examinations and imagings including fluorescein angiography,fundus autofluorescence(FAF) and optical coherence *** of these patients underwent MH *** findings were associated with duration of symptoms,visual acuity at presentation,stage of MH,and postoperative anatomical ***:The mean duration of patients’ symptoms was 3.8±2.0(1-9) *** MH was stage 2 in 4(10%),stage 3 in 24(60%) and stage 4 in 12(30%) *** median preoperative best corrected visual acuity was 20/200(between 20/800 and 20/100).Twenty-eight of cases(70%) showed a stellate appearance with dark radiating *** a visual acuity ≥20/200 was significantly more common in eyes with stellate appearance(P<0.001).The mean duration of symptoms was significantly shorter in eyes with stellate appearance(2.75±0.8 vs 6.33±1.61 months)(P<0.001).The frequency of stage 4 MH was significantly higher in eyes with nonstellate appearance(P<0.001).Anatomical correction of MH was achieved in 91.3%(21/23) of eyes with stellate appearance and 71.4%(5/7) of eyes without this appearance(P=0.225).CONCLUSION:Stellate appearance in FAF is associated with earlier stages of macular hole,better visual acuity at presentation,shorter duration of symptoms,thus more favorable prognosis.

关键词： autofluorescence imaging macular hole prognosis surgery

Oxidant/antioxidant balance in the aqueous humor of patients with glaucoma

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International Journal of Ophthalmology(English edition) 2016年第2期9卷 249-252页

作者： Esra Ergan Faruk ozturk Emrullah Beyazyildiz Ufuk Elgin emine Sen Ali Bulent Cankaya Tugrul Celik Department of Ophthalmology Amasya UniversitySabuncuoglu Serefeddin Research and Training Hospital Department of Ophthalmology Hacettepe University Department of Ophthalmology Samsun Research and Training Hospital Department of Opthalmology Ulucanlar Eye Research Hospital Department of Biochemistry Turgut Ozal University

AIM： To evaluate total antioxidant status （TAS）, total oxidant status （TOS）, and the oxidative stress index （OSI） of the aqueous humor （AH） in patients with glaucoma. METHODS： The prospective study was composed of a study group （n-31） and a control group （n=31）. Fifteen patients in the study group were diagnosed with primary open angle glaucoma （POAG）, and 16 patients were diagnosed with pseudoexfoliation glaucoma （PEG）. The control group was composed of non-glaucomatous patients with cataracts. AH samples were collected and analyzed for TAS, TOS, and OSI levels. RESULTS： Mean AH TAS level was significantly higher in patients with glaucoma than that in the control group （P〈0.01）. Mean TOS and OSI levels tended to increase in patients with glaucoma. No significant differences in TAS, TOS, or OSI levels were observed between patients with POAG and PEG. CONCLUSION： High levels of TAS were observed in patients with glaucoma, which was likely a response to the increased oxidative stress observed in these patients.

关键词： oxidative stress primary open angleglaucoma pseudoexfoliation glaucoma total antioxidantstatus total oxidant status

Solutions in the Discrete Fractional Forms of Two Differential Equations with Singular Points

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Acta Mathematicae Applicatae Sinica 2020年第4期36卷 975-981页

作者： Okkes ozturk Independent Researcher Islahiye 27800Turkey

In present note,we apply the Leibniz formula with the nabla operator in discrete fractional calculus(DFC)due to obtain the discrete fractional solutions of a class of associated Bessel equations(ABEs)and a class of associated Legendre equations(ALEs),***,we exhibit a new solution method for such second order linear ordinary differential equations with singular points.

关键词： fractional calculus discrete fractional calculus discrete fractional solutions nabla operator