Microstructure and mechanical properties of bulk yttria-partially-stabilized zirconia

A commercially available bulk 4.5 mole percent yttria-(Y2O3) partially stabilized zirconia (PSZ) was studied by light microscopy, X-ray analysis, microhardness measurement, and fracture toughness testing. The growth of the precipitates and the phase transformations were studied as a function of aging in air at 1500 C. Aging curves were constructed for both the as received and the solution annealed and quenched materials; the curves showed hardness peaks at 1397 and 1517 Kg/sq mm respectively. The rectangular plate shaped tetragonal precipitates were found to have a 110 habit plane. A total of twelve different types of tetragonal precipitates were found. Grinding of the Y2O3 PSZ into powder did not cause a significant amount of metastable tetragonal precipitates to transform into the monoclinc phase, thus indicating that transformation toughening is not a significant mechanism for the material

Magnetoconductance response in unipolar and bipolar organic diodes at ultrasmall fields

Journal ArticleWe measured magnetoconductance (MC) response in a number of unipolar and bipolar organic diodes based on rr-conjugated polymers and small molecules at fields |B|< 100 mT and various bias voltages and temperatures. Similar to magneto-electroluminescence, the MCðBÞ response in bipolar diodes shows a sign reversal at ultrasmall |B| < 1-2 mT due to interplay f hyperfine and Zeeman interactions in opposite-charge polaron pairs. Surprisingly, similar MCðBÞ response was also measured in unipolar devices, indicating the existence of like-charge polaron pairs, however, with a clear difference between the hyperfine interaction constants of electron polaron and hole polaron

Efek Perubahan Iklim Terhadap Usaha Tambak Ikan Bandeng di Desa Bulu Cindea Biringkassi, Kecamatan Bungoro, Kabupaten Pangkep

Penelitian ini bertujuan untuk mengidentifikasi fenomena perubahan iklim lokal pada Desa Bulu Cinde Kabupaten Pangkep, menganalisis dampaknya pada produksi ikan bandeng, dan mengevaluasi kesejahteraan petambak ikan bandeng. Penelitian berlangsung selama tiga bulan, yaitu dari April hingga Juni 2023. Hasil penelitian menunjukkan bahwa petambak mengalami dampak yang signifikan akibat perubahan iklim lokal. Dampak ini terlihat dari peningkatan curah hujan, jumlah hari hujan, hari kering selama musim kemarau, suhu rata-rata, ketinggian dan intensitas pasang air laut. Poduksi ikan mengalami penurunan yang signifikan dalam periode 2013-2021, mencapai sekitar 25-50 persen. Penurunan terbesar terjadi pada tambak tradisional (40-50%), diikuti oleh tambak semi intensif (30-40%) dan tambak intensif (25-30%). Sementara itu, biaya operasional untuk beradaptasi dengan perubahan iklim meningkat sekitar 150-200 persen. Adaptasi yang dilakukan seperti merubah jadwal panen, menanam pohon di sekitar tambak, dan meninggikan tanggul

Microrheology with optical tweezers: data analysis

We present a data analysis procedure that provides the solution to a long-standing issue in microrheology studies, i.e. the evaluation of the fluids' linear viscoelastic properties from the analysis of a finite set of experimental data, describing (for instance) the time-dependent mean-square displacement of suspended probe particles experiencing Brownian fluctuations. We report, for the first time in the literature, the linear viscoelastic response of an optically trapped bead suspended in a Newtonian fluid, over the entire range of experimentally accessible frequencies. The general validity of the proposed method makes it transferable to the majority of microrheology and rheology techniques

PEMANFAATAN TEKNOLOGI INDERAJA UNTUK PENINGKATAN EKONOMI NELAYAN DI DESA LILIBOY

Remote sensing technology has developed very rapidly and has a very significant role in the fisheries and marine sector as a provider of data and information. Liliboy Country is a coastal village located on the island of Ambon which has very productive waters with potential for fishing activities. This Community Service is made in the form of counseling, with the aim of introducing technological knowledge and providing information about fishing areas, as well as developing skills for the fishermen of Liliboy village to get more effective and efficient catches. It is hoped that the fishing community of Liliboy village will understand the use of sensing technology to determine fishing areas so that it will grow the community's economy and improve the welfare of lif

Pallet system

Pallet systems are described that can be formed of corrugated paperboard without the necessity of any attachment materials such adhesives, staples, or the like. Individual stringers of a pallet matrix are interwoven together, with stringer notches interlocking with notches of crossing stringers from both above and below any one stringer. Systems can be easily and quickly assembled and, should the need arise, can be quickly repaired, for instance by replacement of one or more individual runners. Systems can also exhibit extremely high strength, and can withstand greater than about 20,000 pounds of static compression at less than about 3/8 inch deflection

Face-space: A unifying concept in face recognition research

The concept of a multidimensional psychological space, in which faces can be represented according to their perceived properties, is fundamental to the modern theorist in face processing. Yet the idea was not clearly expressed until 1991. The background that led to the development of face-space is explained, and its continuing influence on theories of face processing is discussed. Research that has explored the properties of the face-space and sought to understand caricature, including facial adaptation paradigms, is reviewed. Face-space as a theoretical framework for understanding the effect of ethnicity and the development of face recognition is evaluated. Finally, two applications of face-space in the forensic setting are discussed. From initially being presented as a model to explain distinctiveness, inversion, and the effect of ethnicity, face-space has become a central pillar in many aspects of face processing. It is currently being developed to help us understand adaptation effects with faces. While being in principle a simple concept, face-space has shaped, and continues to shape, our understanding of face perception