Betonarme yapıların onarım ve güçlendirilmesinde (O/G) Lifli Polimer (FRP) malzemenin kullanımı son zamanlarda yaygınlaşmaya başlanmıştır. FRP malzemelerin, yüksek çekme mukavemeti, korozyona karşı ...dayanıklılığı ve bu malzeme ile yapılan O/G’nin, yapının işleyişini çok fazla etkilememesi gibi nedenlerle tercih edilen bir malzeme olmaktadır. Pamukkale Üniversitesi, Mühendislik Fakültesi, İnşaat Mühendisliği Bölümü, Yapı labaratuarlarında yapılan bu çalışmada dört adet betonarme kirişin FRP malzemelerle onarım ve/veya güçlendirilmesi yapılmıştır. Her deney kirişi için yük deplasman eğrisi elde edilerek elemanların statik yük altında O/G’den önceki ve sonraki davranışı karşılaştınlmıştır. Bu çalışma sonucunda FRP malzemelerle yapılan O/G’nin betonarme kirişlerin taşıma gücünü çok büyük ölçüde arttırdığı görülmüştür.
Betonarme yapıların onarım ve güçlendirilmesinde (O/G) Lifli Polimer (FRP) malzemenin kullanımı son zamanlarda yaygınlaşmaya başlanmıştır. FRP malzemelerin, yüksek çekme mukavemeti, korozyona karşı ...dayanıklılığı ve bu malzeme ile yapılan O/G'nin, yapının işleyişini çok fazla etkilememesi gibi nedenlerle tercih edilen bir malzeme olmaktadır. Pamukkale Üniversitesi, Mühendislik Fakültesi, İnşaat Mühendisliği Bölümü, Yapı labaratuarlarında yapılan bu çalışmada dört adet betonarme kirişin FRP malzemelerle onarım ve/veya güçlendirilmesi yapılmıştır. Her deney kirişi için yük deplasman eğrisi elde edilerek elemanların statik yük altında O/G'den önceki ve sonraki davranışı karşılaştırılmıştır. Bu çalışma sonucunda FRP malzemelerle yapılan O/G'nin betonarme kirişlerin taşıma gücünü çok büyük ölçüde arttırdığı görülmüştür.
Betonarme yapıların onarım ve güçlendirilmesinde (O/G) Lifli Polimer (FRP) malzemenin kullanımı son zamanlarda yaygınlaşmaya başlanmıştır. FRP malzemelerin, yüksek çekme mukavemeti, korozyona karşı ...dayanıklılığı ve bu malzeme ile yapılan O/G'nin, yapının işleyişini çok fazla etkilememesi gibi nedenlerle tercih edilen bir malzeme olmaktadır. Pamukkale Üniversitesi, Mühendislik Fakültesi, İnşaat Mühendisliği Bölümü, Yapı labaratuarlarında yapılan bu çalışmada dört adet betonarme kirişin FRP malzemelerle onarım ve/veya güçlendirilmesi yapılmıştır. Her deney kirişi için yük deplasman eğrisi elde edilerek elemanların statik yük altında O/G'den önceki ve sonraki davranışı karşılaştırılmıştır. Bu çalışma sonucunda FRP malzemelerle yapılan O/G'nin betonarme kirişlerin taşıma gücünü çok büyük ölçüde arttırdığı görülmüştür.
Betonarme yapıların onarım ve güçlendirilmesinde (O/G) Lifli Polimer (FRP) malzemenin kullanımı son zamanlarda yaygınlaşmaya başlanmıştır. FRP malzemelerin, yüksek çekme mukavemeti, korozyona karşı ...dayanıklılığı ve bu malzeme ile yapılan O/G'nin, yapının işleyişini çok fazla etkilememesi gibi nedenlerle tercih edilen bir malzeme olmaktadır. Pamukkale Üniversitesi, Mühendislik Fakültesi, İnşaat Mühendisliği Bölümü, Yapı labaratuarlarında yapılan bu çalışmada dört adet betonarme kirişin FRP malzemelerle onarım ve/veya güçlendirilmesi yapılmıştır. Her deney kirişi için yük deplasman eğrisi elde edilerek elemanların statik yük altında O/G'den önceki ve sonraki davranışı karşılaştırılmıştır. Bu çalışma sonucunda FRP malzemelerle yapılan O/G'nin betonarme kirişlerin taşıma gücünü çok büyük ölçüde arttırdığı görülmüştür.
The use of Fibre Reinforced Polimer (FRP ) materials for the repair and strengthening of Reinforced Concrete structures has become widespread recently. FRP materials are being prefered because they ...have very high tensile strength, resistance to corrosion and they do not affect the use of the building during the repair and strengthening process. Four reinfoced concrete beams repaired and strengthened with FRP materials have been used in this study which were performed at Pamukkale University-Faculty of Engineering- Civil Engineering Department- Structural Engineering Laboratuary. The behaviour of the beams before and after repair and strengthening was compared by obtaining the load- displacement curves under static loading. In this study, it was observed that the repair and strengthening of reinforced concrete beams by using FRP materials had increased the load carrying capacity significantly.
IEEE 802.11 standard was originally designed for high bandwidth applications targeting consumer electronics market. Hence, it was not considered as a feasible technology for wireless sensor ...networking applications. Recently, due to the growing market potential for smart objects with IP connectivity, several companies introduced low-power Wi-Fi products optimized for sensing applications. Wi-Fi brings many advantages for IP enabled sensors such as easy integration with existing infrastructure, built-in IP-network compatibility and familiar protocols and management tools. However, multiple years battery lifetime requirement for sensors remains as the main concern. In this paper, we evaluate the battery lifetime performance of a Wi-Fi sensor for a given scenario and investigate the impact of packet size, data rate, application code size, security schemes and MAC layer retransmissions on battery lifetime.
The vision of Internet of Things calls for connectivity not only to consumer electronics and home appliances, but also to small battery powered devices which cannot be recharged. Such small devices, ...often various types of sensors and actuators, are required to sustain reliable operation for years on batteries even in the presence of heavy interference. The IEEE 802.11 standard has established itself as one of the most popular wireless technologies offering connectivity. Using commercially available chips, we demonstrate the feasibility of low-power Wi-Fi technology to enable IP connectivity of battery powered devices. Three typical sensor application scenarios are investigated. We evaluate the power consumption of Wi-Fi enabled devices for each of the scenarios, investigate the impact of interference, and measure the range performance.
Abstract Introduction Sleep disturbances are being increasingly recognized in association with autoimmune encephalitis (AIE). We investigated the prevalence of sleep-related symptoms and ...polysomnographic features of patients with AIE and the long-term outcomes in these patients in a multi-center, prospective study from Turkey. Methods We prospectively evaluated patients with definite AIE in a common database including demographics, AIE-related and sleep-related symptomatology. Maximum and latest modified Rankin scores (mRS) and Liverpool Outcome Score (LOS) were noted. Results Of 142 patients, 87 patients (61.3%) fulfilled the criteria for definite AIE (mean age, 46.8 + 18.8 years; 51.7% women; mean disease duration, 21.0 + 38.4 months). 78.9% of patients had at least one or more new onset or worsened sleep-related symptomatology: insomnia (55.3%), excessive daytime sleepiness (EDS, 28.0%), sleep apnea (18.7%), REM sleep behavior disorder (RBD, 17.3%), restless legs syndrome (10.7%) and oneiric stupor (9.3%). Sleep efficiency, N3 and REM sleep were decreased and N1 sleep was increased in patients with Ab+ AIE. LOS points were highest in those with insomnia and sleep apnea, and lowest in those with EDS, RBD and oneiric stupor. RBD and sleep apnea were more common in anti-LG1 Ab+ group than anti-NMDAR Ab+ group. Index of periodic leg movements was highest in anti-LG1 Ab+ group. Patients with EDS and oneiric stupor had more common memory problems. Maximum and latest mRS scores were positively correlated with EDS and oneiric stupor. EDS, RBD and oneiric stupor were negatively correlated with LOS points. Conclusion Our study emphasizes the presence and importance of early diagnosis of sleep disturbances in AIE in regard to their deteriorative influences on disease prognosis.
Digital ulcers (DUs) are associated with a significant burden in systemic sclerosis (SSc) by leading to severe pain, physical disability, and reduced quality of life. This effort aimed to develop ...recommendations of the Turkish Society for Rheumatology (TRD) on the management of DUs associated with SSc.
In the first meeting held in December 2020 with the participation of a task force consisting of 23 rheumatologists the scope of the recommendations and research questions were determined. A systematic literature review was conducted by 5 fellows and results were presented to the task force during the second meeting. The Oxford system was used to determine the level of evidence. The preliminary recommendations were discussed, modified, and voted by the task force and then by members of TRD via e-mail invitation allowing personalised access to a web-based questionnaire SurveyMonkey®.
A total of 23 recommendations under 7 main headings were formulated covering non-pharmacological measures for the prevention of DUs and pharmacological treatments including vasodilators, anti-aggregants, antibiotics, wound care, pain control, and interventions including sympathectomy, botulinum toxin, and surgery. Risk factors, poor prognostic factors, prevention of DU and adverse effects of medical treatments were reported as 4 overarching principles.
These evidence-based recommendations for the management of SSc-associated DUs were developed to provide a useful guide to all physicians who are involved in the care of patients with SSc, as well as to point out unmet needs in this field.
Unmet needs of rheumatoid arthritis (RA) patients regarding physician/patient communication, treatment preferences and quality of life issues were investigated in a Turkish survey study.
The study ...was conducted with the contribution of 33 rheumatologists, and included 519 RA patients. The study population included patients who had been on biologic therapy for >6 months and were still receiving biologic therapy (BT group), and those who were biologic naive, but found eligible for biologic treatment (NBT group). Of the RA patients, 35.5% initially had a visit to an internal disease specialist, 25.5% to a physical therapy and rehabilitation specialist, and 12.2% to a rheumatology specialist for their RA complaints. The diagnosis of RA was made by a rheumatologist in 48.2% of patients.
The majority of RA patients (86.3%) visit their doctor within 15-week intervals. Most of the physician-patient communication focused on disease symptoms (99.0%) and impact of the disease on quality of life (61.8%). The proportion of RA patients who perceived their health status as good/very good/excellent was higher in the BT group than in the NBT group (74.3% vs. 51.5%, p<0.001). However, of those RA patients in the NBT group, only 24.8% have been recommended to start a biologic treatment by their doctors. With respect to dose frequency options, once-monthly injections were preferred (80%) to a bi-weekly injection schedule (8%).
In conclusion, RA patients receiving biologic therapy reported higher rates of improved symptoms and better quality of life and seemed to be more satisfied with their treatment in our study.
