Plastic response by dislocation glide in solid helium under dc strain rate loading

We develop a model for the gliding of dislocations and plasticity in solid He-4. This model takes into account the Peierls barrier, multiplication and interaction of dislocations, as well as classical thermally and mechanically activated processes leading to dislocation glide. We specifically examine the dc stress-strain curve and how it is affected by temperature, strain rate, and dislocation density. As a function of temperature and shear strain, we observe plastic deformation and discuss how this may be related to the experimental observation of elastic anomalies in solid hcp He-4 that have been discussed in connection with the possibility of supersolidity or giant plasticity. Our theory gives several predictions for the dc stress strain curves, for example, the yield point and the change in the work-hardening rate and plastic dissipation peak, that can be compared directly to constant strain rate experiments and thus provide bounds on model parameters.Comment: 10 pages, 8 figures; minor revisions of accepted versio

Pengaruh Perubahan Penggunaan Lahan terhadap Sosial Ekonomi Masyarakat di Kota Semarang (Kasus:waduk Jatibarang)

Salah satu program pemerintah di Kota Semarang dalam mengurangi limpasan air yang banyak saat hujan dan menjaga pasokan air baku adalah dengan program pembangunan Waduk Jatibarang di Kecamatan Mijen dan Gunungpati. Tujuan penelitian ini untuk mengidentifikasi Perubahan kondisi lahan milik masyarakat, identitas sosial-ekonomi masyarakat, dan pengaruh pembangunan Waduk Jatibarang terhadap penggunaan lahan dan kondisi sosial ekonomi masyarakat. Metode penelitian adalah observasi, wawancara terhadap 70 responden, dan data instansi. Teknik analisisnya menggunakan analisis tabel silang, paired sample t-test, dan korelasi. Hasil penelitian menunjukkan bahwa (1) luas Perubahan lahan milik masyarakat paling besar berada di Kelurahan Kedungpane mencapai 60%, sedangkan yang paling sedikit berada di Kelurahan Jatibarang hanya sebesar 8% dari luas sebelumnya dengan bentuk Perubahan paling banyak dari sawah dan tegalan menjadi perairan waduk serta kawasan sabuk hijau pada tahun 2010, (2) sebagian besar mata pecaharian masyarakat mengalami Perubahan berupa petani menjadi buruh tani, proyek bangunan, dan jasa perahu bebek, sehingga pendapatan masyarakat di Kelurahan Jatibarang dan Jatirejo mengalami penurunan sebesar 7% dan 14%, sedangkan di Kelurahan Kedungpane dan Kandri mengalami peningkatan 4% dan 1%, (3) pembangunan Waduk Jatibarang memiliki nilai korelasi sebesar 0,656 pada Perubahan penggunaan lahan, sedangkan pada kondisi sosial ekonomi sebesar 0,210

Pengaruh Perubahan Penggunaan Lahan terhadap Sosial Ekonomi Masyarakat di Kota Semarang (Kasus:waduk Jatibarang)

Salah satu program pemerintah di Kota Semarang dalam mengurangi limpasan air yang banyak saat hujan dan menjaga pasokan air baku adalah dengan program pembangunan Waduk Jatibarang di Kecamatan Mijen dan Gunungpati. Tujuan penelitian ini untuk mengidentifikasi Perubahan kondisi lahan milik masyarakat, identitas sosial-ekonomi masyarakat, dan pengaruh pembangunan Waduk Jatibarang terhadap penggunaan lahan dan kondisi sosial ekonomi masyarakat. Metode penelitian adalah observasi, wawancara terhadap 70 responden, dan data instansi. Teknik analisisnya menggunakan analisis tabel silang, paired sample t-test, dan korelasi. Hasil penelitian menunjukkan bahwa (1) luas Perubahan lahan milik masyarakat paling besar berada di Kelurahan Kedungpane mencapai 60%, sedangkan yang paling sedikit berada di Kelurahan Jatibarang hanya sebesar 8% dari luas sebelumnya dengan bentuk Perubahan paling banyak dari sawah dan tegalan menjadi perairan waduk serta kawasan sabuk hijau pada tahun 2010, (2) sebagian besar mata pecaharian masyarakat mengalami Perubahan berupa petani menjadi buruh tani, proyek bangunan, dan jasa perahu bebek, sehingga pendapatan masyarakat di Kelurahan Jatibarang dan Jatirejo mengalami penurunan sebesar 7% dan 14%, sedangkan di Kelurahan Kedungpane dan Kandri mengalami peningkatan 4% dan 1%, (3) pembangunan Waduk Jatibarang memiliki nilai korelasi sebesar 0,656 pada Perubahan penggunaan lahan, sedangkan pada kondisi sosial ekonomi sebesar 0,210

Dislocation induced anomalous softening of solid helium

The classical motion of gliding dislocation lines in slip planes of crystalline solid helium leads to plastic deformation even at temperatures far below the Debye temperature and can affect elastic properties. In this work we argue that the gliding of dislocations and plasticity may be the origin of many observed elastic anomalies in solid He-4, which have been argued to be connected to supersolidity. We present a dislocation motion model that describes the stress-strain $\tau$-$\epsilon$ curves and work hardening rate $d\tau/d\epsilon$ of a shear experiment performed at constant strain rate $\dot{\epsilon}$ in solid helium. The calculated $d\tau/d\epsilon$ exhibits strong softening with increasing temperature due to the motion of dislocations, which mimics anomalous softening of the elastic shear modulus $\mu$. In the same temperature region the motion of dislocations causes dissipation with a prominent peak.Comment: 15 double-spaced pages, 4 figures; revised model parameters to account for low experimental yield stress, otherwise unchange

Extracellular RNA in a single droplet of human serum reflects physiologic and disease states.

Extracellular RNAs (exRNAs) are present in human serum. It remains unclear to what extent these circulating exRNAs may reflect human physiologic and disease states. Here, we developed SILVER-seq (Small Input Liquid Volume Extracellular RNA Sequencing) to efficiently sequence both integral and fragmented exRNAs from a small droplet (5 μL to 7 μL) of liquid biopsy. We calibrated SILVER-seq in reference to other RNA sequencing methods based on milliliters of input serum and quantified droplet-to-droplet and donor-to-donor variations. We carried out SILVER-seq on more than 150 serum droplets from male and female donors ranging from 18 y to 48 y of age. SILVER-seq detected exRNAs from more than a quarter of the human genes, including small RNAs and fragments of mRNAs and long noncoding RNAs (lncRNAs). The detected exRNAs included those derived from genes with tissue (e.g., brain)-specific expression. The exRNA expression levels separated the male and female samples and were correlated with chronological age. Noncancer and breast cancer donors exhibited pronounced differences, whereas donors with or without cancer recurrence exhibited moderate differences in exRNA expression patterns. Even without using differentially expressed exRNAs as features, nearly all cancer and noncancer samples and a large portion of the recurrence and nonrecurrence samples could be correctly classified by exRNA expression values. These data suggest the potential of using exRNAs in a single droplet of serum for liquid biopsy-based diagnostics

Entanglement distribution for a practical quantum-dot-based quantum processor architecture

We propose a quantum dot (QD) architecture for enabling universal quantum information processing. Quantum registers, consisting of arrays of vertically stacked self-assembled semiconductor QDs, are connected by chains of in-plane self-assembled dots. We propose an entanglement distributor, a device for producing and distributing maximally entangled qubits on demand, communicated through in-plane dot chains. This enables the transmission of entanglement to spatially separated register stacks, providing a resource for the realization of a sizeable quantum processor built from coupled register stacks of practical size. Our entanglement distributor could be integrated into many of the present proposals for self-assembled QD-based quantum computation (QC). Our device exploits the properties of simple, relatively short, spin-chains and does not require microcavities. Utilizing the properties of self-assembled QDs, after distribution the entanglement can be mapped into relatively long-lived spin qubits and purified, providing a flexible, distributed, off-line resource. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft

PENGARUH PERUBAHAN PENGGUNAAN LAHAN TERHADAP SOSIAL EKONOMI MASYARAKAT DI KOTA SEMARANG (KASUS:WADUK JATIBARANG)

Salah satu program pemerintah di Kota Semarang dalam mengurangi limpasan air yang banyak saat hujan dan menjaga pasokan air baku adalah dengan program pembangunan Waduk Jatibarang di Kecamatan Mijen dan Gunungpati. Tujuan penelitian ini untuk mengidentifikasi perubahan kondisi lahan milik masyarakat, identitas sosial-ekonomi masyarakat, dan pengaruh pembangunan Waduk Jatibarang terhadap penggunaan lahan dan kondisi sosial ekonomi masyarakat. Metode penelitian adalah observasi, wawancara terhadap 70 responden, dan data instansi. Teknik analisisnya menggunakan analisis tabel silang, paired sample t-test, dan korelasi. Hasil penelitian menunjukkan bahwa (1) luas perubahan lahan milik masyarakat paling besar berada di Kelurahan Kedungpane mencapai 60%, sedangkan yang paling sedikit berada di Kelurahan Jatibarang hanya sebesar 8% dari luas sebelumnya dengan bentuk perubahan paling banyak dari sawah dan tegalan menjadi perairan waduk serta kawasan sabuk hijau pada tahun 2010, (2) sebagian besar mata pecaharian masyarakat mengalami perubahan berupa petani menjadi buruh tani, proyek bangunan, dan jasa perahu bebek, sehingga pendapatan masyarakat di Kelurahan Jatibarang dan Jatirejo mengalami penurunan sebesar 7% dan 14%, sedangkan di Kelurahan Kedungpane dan Kandri mengalami peningkatan 4% dan 1%, (3) pembangunan Waduk Jatibarang memiliki nilai korelasi sebesar 0,656 pada perubahan penggunaan lahan, sedangkan pada kondisi sosial ekonomi sebesar 0,210

Plastic Response of Dislocation Glide in Solid Helium under DC Strain-Rate Loading

We develop a model for the gliding of dislocations and plasticity in solid 4He. This model takes into account the Peierls barrier, multiplication and interaction of dislocations, as well as classical thermally and mechanically activated processes leading to dislocation glide. We specifically examine the dc stress-strain curve and how it is affected by temperature, strain rate, and dislocation density. As a function of temperature and shear strain, we observe plastic deformation and discuss how this may be related to the experimental observation of elastic anomalies in solid hcp 4He that have been discussed in connection with the possibility of supersolidity or giant plasticity. Our theory gives several predictions for the dc stress strain curves, for example, the yield point and the change in the work-hardening rate and plastic dissipation peak, that can be compared directly to constant strain-rate experiments and thus provide bounds on model parameters