In this paper, a new empirical path loss model based on frequency, distance, and volumetric occupancy rate is generated at the 3.5 and 4.2 GHz in the scope of 5G frequency bands. This study aims to determine the effect of the volumetric occupancy rate on path loss depending on the foliage density of the trees in the pine forest area. Using 4.2 GHz and the effect of the volumetric occupancy rate contributes to the literature in terms of novelty. Both the reference measurements to generate a model and verification measurements to verify the proposed models are conducted in three different regions of the forest area with double ridged horn antennas. These regions of the artificial forest area consist of regularly sorted and identical pine trees. Root mean square error (RMSE) and R-squared values are calculated to evaluate the performance of the proposed model. For 3.5 and 4.2 GHz, while the RMSEs are 3.983 and 3.883, the values of R-squared are 0.967 and 0.963, respectively. Additionally, the results are compared with four path loss models which are commonly used in the forest area. The proposed one has the best performance among the other models with values 3.98 and 3.88 dB for 3.5 and 4.2 GHz.

Paolo Emilio Botta, who was sent to Mosul as the French Consul in 1842, explored at Kuyunjik and Nebi Yunus and then began investigating ancient stone foundations at Nebi Yunus. Muhammed/Mehmed Pasha and local religious leaders, who were worried that the tomb of prophet Yunus (Jonah) and a local mosque would be destroyed by the excavations, opposed these investigations and the work stopped as a result. After Nebi Yunus, Botta started to work at Kuyunjik in December 1842. While his workers were busy at Kuyunjik, someone from the village of Khorsabad talked about stones with inscriptions and reliefs on them on top of a hill. After three months of exhaustive work at Kuyunjik, on March 20th, 1843 Botta sent a group of workers to Khorsabad for excavation. However, problems arose about Botta's work in Mosul. The Pasha of the province in particular created obstructions. We have done research in the Ottoman Archives of the Prime Ministry of Turkey on Botta's excavation permits and documents, the obstructions created by the Pasha of Mosul, the details of the story of Botta's experiences at Khorsabad and the relevant correspondence. In these archives we have found documents about the problems Botta experienced at Khorsabad, the conditions for excavation permits and the construction of an excavation house, the plan of the excavation house mentioned by Botta, which was drafted like a fortress next to the village houses and sent to Istanbul, as well as petitions of the villagers opposing Botta's work and his excavation house. Here, we attempt to re-read Botta's excavation seasons, permits and the problems he encountered through the documents in the Ottoman Archives in order to understand how this period is to be understood. Through these documents and correspondence, we were able to study the problems that arose between the Ottoman State and France as a result of Botta's excavations at Khorsabad.

The food composition of whiting, Merlangius merlangus, caught around the sea-cage fish farms off the coast of Perşembe, was analysed and compared with the diet of whiting from a control site off the coast of Fatsa (Ordu Province, south-eastern Black Sea). A total of 815 stomach samples were collected during the study, and of these, 195 (23.9%) were empty. According to the percentage of relative importance index (IRI%), pellet food (47.8%) and Annelida (25%) were the main prey groups of whiting in the sea-cage fish farms area, while unidentified teleost (85.3%) and Engraulis encrasicolus (8.2%) were dominant in the control site. The other prey groups in both areas were Crustaceans (Mysidae, Amphipoda, Upogebia sp.), Sprattus sprattus and Gobius spp. Seasonally, pellet food was the most consumed food in all seasons, but Mysidae was the first preference of whiting around the sea-cage fish farms in spring. In the control site, unidentified teleost was the first preference in all seasons, except winter, where E. encrasicolus was the first choice, followed by crustaceans and S. sprattus in winter. Bray–Curtis analysis shows that seasonally, there is no significant difference in the sea-cage fish farms, while there is significant difference in the control site, and two-dimensional nMDS of IRI% revealed a clear separation between both sites. SIMPER analysis revealed that the most contributing factors to the differences between seasons were pellet food in the sea-cage fish farms, and E. encrasicolus in the control site.

We investigate the role of extreme positive payoffs in the distribution of monthly fund returns in investors’ mutual fund preferences. We document a positive and significant relationship between the maximum style-adjusted monthly return (MAX) and future fund flows. The relationship is robust to controlling for average performance, volatility, skewness, and various other fund characteristics. Our findings are consistent with the notion that fund investors overweight the probability of high payoff states in the past return distribution. We further show that MAX is not a useful predictor of future performance and that an increase in a fund’s visibility does not explain our findings.

Toprakkale is the site that constitutes the starting point for the archaeology of Urartu, but the history of the largely destructive early excavations of the site is shrouded in darkness. The presence of items on the antiquities market said to come from the Van region attracted the interest of Austen Henry Layard, which led to brief excavations at the site of Toprakkale by the British Museum under Hormuzd Rassam in 1877, followed by further also brief investigations by K. Kamsarakan as well as continued illegal excavations. It is commonly held that Carl Friedrich Lehmann-Haupt and Waldemar Belck excavated here between 1898–1899, but research performed in the Ottoman Archives of the Prime Minister's Office reveals their claim to have excavated there to be fraudulent and empty. This article uses primary source material from Ottoman archives to investigate the excavation history of one of the most iconic sites for the beginnings of Urartian Studies, and compels us to re-evaluate what we think we know about Toprakkale and the provenance of the objects associated with it.

This paper reports on the substantial improvement of specimen quality by use of a low voltage (0.05 to ~1 keV), small diameter (~1 μm), argon ion beam following initial preparation using conventional broad-beam ion milling or focused ion beam. The specimens show significant reductions in the amorphous layer thickness and implanted artifacts. The targeted ion milling controls the specimen thickness according to the needs of advanced aberration-corrected and/or analytical transmission electron microscopy applications.

In this study, we conducted the in-situ observations of the magnetic domain structure change in Nd2Fe14B magnets at elevated temperature by transmission electron microscopy (TEM) / Lorentz microscopy. The in-situ observations in Nd2Fe14B magnets revealed that the magnetization reversal easily occurred at the elevated temperature. At more than 180°C, the magnetic domain wall motion could be observed by applying the magnetic field of less than 20 mT. The motion of the magnetic domain wall was discontinuous and the domain wall jumped to one grain boundary to the neighboring grain boundary at 180°C. On the other hand, the continuous domain wall motion within grain interior as well as discontinuous domain wall motion was observed at 225°C, and some grain boundaries showed still strong pinning effect even at 225°C. The temperature dependence of the pinning effect of grain boundaries would not uniform.

This paper will discuss the structure-property model developed that correlates the tensile modulus to the elastic properties and angular distribution of constituent graphitic layers for carbon fiber derived from a polyethylene precursor. In addition, a high-temperature fiber tensile device was built to enable heating of carbon fiber bundles at a variable rate from 25 °C to greater than ∼2300 °C, while simultaneously applying a tensile stress. This capability combined with synchrotron wide-angle x-ray diffraction (WAXD), enabled observation in situ and in real time of the microstructural transformation from different carbon fiber precursors to high-modulus carbon fiber. Experiments conducted using PAN- and PE-derived fiber precursors reveal stark differences in their carbonization and high-temperature graphitization behavior.