2,205 research outputs found
Polat Ma aras ve Turizm Potansiyeli (Do an ehir-Malatya)
No full textPolat Ma aras , Malatya ili Do an ehir ilçesinin Polat beldesi s n rlar içindedir. Ma arayla ilgili herhangi literatüre rastlan lmam olup, ma ara hakk nda ilk ara t rma taraf m zdan gerçekle tirilmi tir. Yöre halk taraf ndan bilinen ma ara, co rafi güçlükler nedeniyle pek ziyaret edilmemi tir. PermoTriyas ya l kristalize kireçta lar içinde yatay ekilde geli en ma ara, orta büyüklükte, uzunlu u yakla k 100 m, en geni yeri ise 6 m dir. Tavan yüksekli i yer yer de i mekle birlikte 3 m den fazla de ildir. Ma aran n giri k sm denizden 2070 m yüksektedir. çinde özellikle sark t, dikit, sütun ve traverten gibi karstik ekiller dikkat çeker. Ma aran n, ekli ve çökeltilerin olu turdu u özelliklere dayanarak olgunluk sürecinde oldu u söylenebilir. Ma ara ilmiyle u ra an ara t rmac lara Polat Ma aras n tan tmak bu çal man n amaçlar ndan biridir. Ancak as l amaç Polat Ma aras n n tan t m n yaparak ziyarete aç lmas n sa lamakt r. Turizm aç s ndan önemli bir potansiyeli oldu unu dü ündü ümüz ma aran n, yöre tan t m na ve ekonomisine destek sa layaca ümit edilmektedirPolat Cave is placed within the borders of Polat Town of Do an ehir in Malatya. No literature was evidenced about this cave and this is the first study on it. The cave, well known by the people in the surrounding, has not been able to be visited much due to the geographical reasons. Polat Cave, which has been developed horizontally, is medium in size, 100 meters in length and 6 meters in width in its widest point. However its height varies, it is not over 3 meters. The altitude of the entrance of the cave is 2070 meters Above Sea Level. (ASL). The calcitic formations, in particular, such as stalactites, stalagmites, columns, and travertine are noteworthy in the cave. Depending on the shape and size of dropstones, it can be told that the cave is in its maturing period now. Introducing Polat Cave to the researchers of cave is one of the goals of this study. However, the main purpose of the study is to open it to the visitors by making the presentation of it. It is expected that this cave, which we think to have a significant potential for tourism, would contribute to the presentation and economy of the region
Polat, N., Mahalingappa, L., & Kayi-Aydar, H. (2021). The preparation of teachers of English as an additional language around the world: Research, policy, curriculum and practice. Multilingual Matters.
No full textThe preparation of teachers of English as an additional language around the world: Research, policy, curriculum and practice.
Polat, N., Mahalingappa, L., & Kayi-Aydar, H.
Multilingual Matters, 2021
Effect of L-alanyl-glycine dipeptide on calcium oxalate crystallization in artificial urine
No full textPathological crystallization of calcium oxalate (CaOx), the most common constituent of kidney stones, has attracted much attention due to recent surge in reported natural and synthetic additives effectively inhibiting its nucleation and growth. The aim of this study is to investigate the effect of L-alanyl-glycine (Ala-Gly), a dipeptide commonly found in human urine, on CaOx crystallization and its phase transformation in the presence of an artificial urine media. The nucleated CaOx crystals are characterized by XRD, FTIR, SEM, and dynamic light scattering in terms of changes in their crystalline form, morphology, and size. XRD and FTIR results revealed that Ala-Gly inhibited the formation of the thermodynamically most stable phase of CaOx, calcium oxalate monohydrate (COM) crystals. SEM images revealed that hexagonal plate-shaped COM crystals are transformed into the smaller tetragonal bipyramidal calcium oxalate dihydrate (COD) crystals with increasing additive concentrations. At 125 ppm Ala-Gly concentration more pronounced aggregation of CaOx crystals is observed accompanied with higher negative zeta potential value of -27.1 +/- 2.9 mV. Moreover, the phase transformation from COM to COD is also confirmed through thermogravimetric analysis. Consequently, these results suggest that Ala-Gly has a profound effect on preventing the formation of COM crystals and helping to stabilize the COD crystals, a CaOx phase that is reported to have a lower tendency to stick to kidney cells thus decreasing the risk of stone formation. The reported suppression of COM in the presence of Ala-Gly might be significant to clinicians in their attempt to develop a long-term effective treatment for kidney stones
Influence of Glycyl‐L‐Glutamic Acid Dipeptide on Calcium Pyrophosphate Dihydrate Crystallization
No full textEffect of L-alanyl-glycine dipeptide on calcium oxalate crystallization in artificial urine
No full textPathological crystallization of calcium oxalate (CaOx), the most common constituent of kidney stones, has attracted much attention due to recent surge in reported natural and synthetic additives effectively inhibiting its nucleation and growth. The aim of this study is to investigate the effect of L-alanyl–glycine (Ala–Gly), a dipeptide commonly found in human urine, on CaOx crystallization and its phase transformation in the presence of an artificial urine media. The nucleated CaOx crystals are characterized by XRD, FTIR, SEM, and dynamic light scattering in terms of changes in their crystalline form, morphology, and size. XRD and FTIR results revealed that Ala–Gly inhibited the formation of the thermodynamically most stable phase of CaOx, calcium oxalate monohydrate (COM) crystals. SEM images revealed that hexagonal plate-shaped COM crystals are transformed into the smaller tetragonal bipyramidal calcium oxalate dihydrate (COD) crystals with increasing additive concentrations. At 125 ppm Ala–Gly concentration more pronounced aggregation of CaOx crystals is observed accompanied with higher negative zeta potential value of −27.1 ± 2.9 mV. Moreover, the phase transformation from COM to COD is also confirmed through thermogravimetric analysis. Consequently, these results suggest that Ala–Gly has a profound effect on preventing the formation of COM crystals and helping to stabilize the COD crystals, a CaOx phase that is reported to have a lower tendency to stick to kidney cells thus decreasing the risk of stone formation. The reported suppression of COM in the presence of Ala–Gly might be significant to clinicians in their attempt to develop a long-term effective treatment for kidney stones.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Complex Fluid Processin
Designing and Developing Educational Mobile Application Training for Teacher Candidates for Innovative Pathways
No full textWith the widespread use of mobile technologies today, educational mobile applications have become increasingly important not only for general education, but also for special education. Motivated by the imperative to equip future educators with the knowledge to utilise these pivotal tools, qualitative research on prospective teachers/educators enrolled in an Italian university was designed to discern their needs concerning educational mobile application training following an inclusive approach. As an initial step, a needs analysis form was administered to 171 teacher candidates in a pilot study, with any ambiguities in the form subsequently addressed. This was followed by consultations with four special education experts, which informed the development of a provisional training plan and accompanying materials. The refined needs analysis form was later disseminated to a different set of 57 prospective teachers/educators. Drawing on the insights from these data, the conclusive training plan and materials were developed, integrating feedback from two educational technology specialists. The training spanned a cumulative duration of 10 h. At its culmination, feedback was garnered from the participants and assessed to gauge the efficacy and pertinence of the training regimen. The study can contribute in analysing the training needs and students’ expectations in terms of curriculum development towards technology-enhanced learning with a focus on mobile applications, special needs, and inclusive approaches
The past scene of hospitality ethics: A citation analysis perspective
No full textThe literature on ethics research in hospitality has significantly expanded in recent years. The objective of this study is to present a comprehensive overview of ethical research in the field of hospitality literature. This will facilitate insight into future developments by examining the past. A two-step approach is employed, comprising citation analysis, a bibliometric analysis technique, and a systematic review. The former is used to identify themes, which are then discussed in the latter. The citation analysis revealed five main themes of the domain: environmental concerns, organisational citizenship behaviour, reputation management and ethical leadership. Environmental concerns were examined from two perspectives: the viewpoint of hotels and the environmental behaviours of tourists and consumers. Subsequently, a systematic review was conducted using the TCM framework (theory/context/methodology) with the objective of identifying the most prominent theories, contexts, and methodological issues associated with each theme. The issue has predominantly been discussed using quantitative analysis and social-based theories. Research has been mainly conducted in the US and the EU. Environmental ethics is likely to remain a significant area of concern in the future. This study offers a perspective that can aid researchers in developing future studies on ethics and help practitioners enhance the ethical climate of the industry. © The Author(s) 2024
Saprinus tenuistrius subsp. tenuistrius MARSEUL 1855
No full text<i>Saprinus tenuistrius tenuistrius</i> MARSEUL, 1855 <p>M a t e r i a l e x a m i n e d: Karaman: 10.VII.2014, 3.</p> <p>This subspecies is newly recorded from Turkey.</p>Published as part of <i>Polat, Alper & Yildirim, Erol, 2017, A contribution to the knowledge of the Histeridae (Coleoptera) fauna of Turkey, pp. 1523-1527 in Linzer biologische Beiträge 49 (2)</i> on page 1525, DOI: <a href="http://zenodo.org/record/5419698">10.5281/zenodo.5419698</a>
Characterization and Kinetics of Calcium Sulfate Dihydrate Crystallization in the Presence of Trimesic Acid
No full textIn this study, calcium sulfate dihydrate crystallization was studied within a mixed-suspension, mixed-product-removal-type crystallizer at 65 degrees C and 2.5 pH in pure media and in the presence of trimesic acid. The experiments were performed at different trimesic acid concentrations (250, 1000, and 2500 p.p.m.) through the reaction of calcium carbonate solution with sulfuric acid solution. The crystal size distributions (CSDs) and filtration rates of calcium sulfate dihydrate crystals were measured, and the crystals obtained were also analyzed by thermogravimetric analysis-coupled with Fourier transform infrared-mass spectrometry and scanning electron microscopy. It was determined that the length/width ratio of the crystals obtained in the trimesic acid additive media decreased compared with the crystals obtained in the pure media. Both the filtration rate and the average particle size decreased with an increase in trimesic acid concentration. The kinetics of crystal growth of calcium sulfate dihydrate has been analyzed on the basis of McCabe's Delta L law. It has been found that the growth rate of crystals depends on the particle size, which was specified using Abegg, Stevens, and Larson, Canning and Randolph, two-parameter Mydlarz and Jones, and three-parameter Mydlarz and Jones size-dependent growth models. Results indicated that three-parameter Mydlarz and Jones model ideally fitted for the characterization of the system because it has high relative coefficient and low square deviation. The presence of trimesic acid also led to a decrease in the growth rate of calcium sulfate dihydrate crystals. (C) 2017 Curtin University of Technology and John Wiley & Sons, Ltd
Akustik Dalgalarin Silindir Kesitli Yari-sonsuz Bir Borudan Kirinimi
No full textTez (Doktora) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 1997Thesis (Ph.D.) -- İstanbul Technical University, Institute of Science and Technology, 1997Bu çalışmada, yüzeylerinde empedans türünden sınır koşullarının sağlandığı ve belirli bir kalınlığa sahip olan silindir kesitli yarı-sonsuz bir borudan akustik dalgaların kırınımı incelenmiştir (Bk. Şekil 1). Açısal simetri sağlamak amacıyla dalgaların bu halka kaynak tarafından uygulandığı varsayılmıştır. Bu problemin klasik Fourier dönüşümü tekniği ile formülasyonu yapılırsa, çözülmesi mümkün olmayan bir vektörel Wierier- Hopf denklemi elde edilir. Bu nedenle, Fourier dönüşümü tekniği ile Mod uydurma (Mode Matching) yöntemi birlikte kullanılmıştır. Bu karma yöntem problemi ikinci tipten skaler bir modifiye Wiener- Hopf denklem ine indirgenmiştir. Bu son problemin çözümü de sonsuz boyutlu bir lineer denklem sisteminin çözümüne indirgenmiş ve sayısal tekniklerle, yaklaşık olarak, çözülmüştür. Zı Z-> ıı- cı. Şekil 1. Problemin Geometrisi vııı 2. Problemin Formülasyonu (p, , z) alışılmış silindirik koordinatlan göstermek üzere, p = b, z = c > 0 çizgisi üzerinde bulunan bir halka kaynak tarafından üretilen akustik dalgaların B = {(p, , z)\ a2 < p < a\, ? [0, 2ıt), z < 0} bölgesinde bu lunan silindir kesitli, yarı-sonsuz bir borudan saçılmasını göz önüne alalım. Zq ortamın akustik dalga empedansmı göstermek üzere borunun p = a\, z < 0 yüzeyi Zı = Z0/r)U p = a2, z < 0 yüzeyi Z2 = Z0/r]2 ve a2 < p < ctı, z - 0 yüzeyi de Z3 = Zq/tj3 empedansı ile modellenebilir olsun. Prob lem, u(p, z) toplam alanının aşağıdaki gibi ayrılan değişik bölgelerdeki açık ifadesinin bulunmasından ibarettir: uı(p,z), p>b. u2(p,z), a,<p0, Uj U4(p,z), p < a2, z < 0. Bilindiği gibi, a2 < p < aı, z < 0 bölgesinde toplam alan özdeşleyin sıfıra eşittir. Yukarıda sözü edilen u\, u2, u3 ve w4 fonksiyonlan, Helmholtz denklemini, açık ifadeleri aşağıda verilen sınır ve süreklilik koşulları altında sağlar: uı(b,z)=u2{b,z), z <="" 0="" (2d)="" [ikri3="" u3(p,0)="0," a2<="" o,0), p0 (2h) d d ?K-u2(auz) = -u3(auz), z > 0. (2i) Toplam alanın çok uzaklara gidildikçe asimptotik davranışı, radyasyon koşulu uyarınca pikr U ~ y/p2 + z2 -> 00 (2j) IX seklindedir. Ayrıca çözümün tekliğini garantileyebilmek için p = a\, z = O kenarına ilişkin u = sabit, z - > +0 (3a) dp (36) ayrıt koşullarını da göz önüne almak gerekir [9]. p>bvea\<p<="" 3m(k)="" yarı-="" düzleminde,="" g+(p,="" qm(a)="" style="margin: 0px; padding: 0px; outline: 0px;"> ^sm(-k) yarı-düzleminde regüler olan fonksiyonlardır. (5a) nm öı <pb bölgelerinde radyasyon koşulunu sağlayan çözümleri göz önüne alınırsa F(p,a) = A(a)H{01)(Kp) (7) G+(p,a) + G~(p,a) = B(a)J0(Kp) + C(a)Y0(Kp) (8) yazılabileceği anlaşılır. Şimdi halka kaynağın (2a,b) ile verilen tanımının Fourier dönüşümünü göz önüne alalım. Bu A(a), B(a) ve C(a) spektral katsayıları arasında A(a)H^\Kb) = B(a)J0(Kb) + C(a)Y0(Kb) (9a) A^H^İKb) = B(a)J!(Kb) + C(a)Y1(Kb) - -- (96) K(a) bağıntıları elde edilir. (2c) nin Fourier dönüşümü alınırsa ikr]1G~(a1,a) + Ğ~(aı,a) = 0 (10) elde edilir. Burada, G~ deki (.) ilk argümana göre alman türevi gösterir. Bu denklemi (8) de kullanırsak B{a)M{a) + C{a)N(a) = W+(a) (İla) bulunur. Burada W+(a) = ikrnG+(aı,a) + Ğ+(aua), (116) M(a) = ikrn JQ(Ka{) - KJı(Kax\ (11c) N(a) = ikruYoiKax) - KYx(Kaı) (lld) şeklinde tanımlanmıştır. Öte yandan (9a,b) arasında A(a) nm yok edilme siyle C(a) - İB(a) = -^H{Q1}(Kb)eİQC (12) 2 xı elde edilir. (İla) ve (12) den B(a) ve C(a) spektral katsayıları B{a)L{a) = W+(a) + ^-Nİ^H^İKb)^010, (13a) C(a)L(a) = iW+{a) - ^-M{a)H^\Kb)eiac (136) olarak bulunur. Burada L{a) = ikrnH^İKaı)- KH[l)(Ka{) (13c) konmuştur. p < aı, z > 0 bölgesinde uz(p,z) fonksiyonunun sağladığı Helmholtz denkleminin Fourier dönüşümü alınırsa ?£('£) +**w H+(p,a) = f(p) + ag(p) (14a) yazılır. Burada oo H+(p,a) = Ju3(p,z)eiazdz, (146) o fİP) = fcUs(P,0) » 9İP) = -*«s(p, 0) (14c, d) olarak tanımlanmıştır. (14a) mn Green fonksiyonu tekniği ile çözümü H+(p,a) = j^{D(a)J0(Kp) + J[f(t) + ag(t)]Q(t,p,a)tdt} (15a) o ntni,*fMKp)[M(a)Y0(Kt)-N(a)J0(Kt)], 0<p<" ~j="" a2="" ro="l" "="" k="" 0,="" ax="" (27)="" elde="" ederiz.="" nm="" her="" iki="" tarafını="" (&="" jf-)="" çarpıp="" 3="0" dan="" ye="" integre="" edersek="" 2İ="" a="" o="" c*="/" s'm="" 5="" t="" 1,2,..="" bulunur.="" u^,="" q,m="" $to^,="" sırasıyla="" v*="1" (??2&g2="" 6?)2="" (28a)="" (286)="" Ûm="ir]2ka2J^ma2jax)" +="" (nfma2="" a1)j1(jma2="" a1)="" (28c)="" 2="" t2="" ?dmi^dmo-z="" ai)="" -&,="" (28d)="" olarak="" benzer="" şekilde="" nin="" pjo^e-^-)="" e="" ^?3ff?="-2»." a2\="" îîf="" ^="" (fin="" km)jo(Çn)="" ?d="" tn="" ı="" £="" ut-="" 1="" -(mkaı="" je)2="" (2h)="" süreklilik="" koşulunun="" fourier="" dönüşümü="" alalım:="" c-n,="" *-="" 1,="" z,...="" (29a)="" (296)="" h+(aua)="G+(aua)." (30)="" xiv (8),="" (13a,b),="" (15a)="" ifadeleri="" da="" konur="" terim="" integral="" alınırsa="" ikinci="" tip="" modifiye="" wiener-hopf="" denklemi="" edilir:="" -yg="" (a1,a)+tj-5-="---7f-re" +y="" (<="" _="" [="" m+a*m]="" (31a)="" ^(a)="7TtM(a)X(a)" (316)="" dir.="" 3.="" denkleminin="" yaklaşık="" Çözümü="" de="" görülen="" denklemini="" çözmek="" için="" önce="" bu="" ifade="" deki="" v(a)="" çekirdek="" fonksiyonunu="" anlamında,="" yani,="" v{a)="V+(a)V~(a)" (32)="" şeklinde="" ayrıştırmak="" gerekir.="" buradaki="" v+(a)="" v~(a),="" sırasıyla,="" 'îsm(a)="" style="margin: 0px; padding: 0px; outline: 0px;"> 3tn(- k) ve 3m(a) < Sto(&) yarı-düzlemlerinde regüler ve sıfırları olmayan fonksiyonlardır. Açık ifadeleri Ek-A da verilmiştir. (31a) nın iki tarafı V~(a) ile çarpıldıktan sonra Wiener-Hopf anlamında dekom- poze edilirse, Liouville teoremi uyarınca W+(a) " x, «ı ^ Mim) V+(am) rf -- - - = 1(a) + - > - : - ? -[fm - amgr 1+{q) 2 ^ 2am (a + ttm) (33a) olduğu görülür. Burada 1{a) = _1 !/r,^il* (336) w 2tr 2 y w £(r) (r - a) v ; £+ ile verilir. (33b) deki integral semer noktası tekniği ile değerlendirildiğinde 1(a) = Irea(An asymptotic high-frequency solution is presented for the problem of diffraction of acoustic waves emanating from a ring source by a semi- infinite cylindrical pipe of certain wall thickness having different internal, external and end surface impedances. By using the Fourier transform technique in conjunction with the Mode matching method, the diffraction problem is reduced into a modified Wiener-Hopf equation of the second kind and then solved approximately. Various numerical results illustrating the effects of the parameters of the problem on the diffraction phenomenon are presented. DoktoraPh.D
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