Observation of Josephson-like Tunneling Junction Characteristics and Positive Magnetoresistance in Oxygen Deficient Nickelate Films of Nd0.8Sr0.2NiO3−δ

Nickelate films have recently attracted broad attention due to the observation of superconductivity in the infinite layer phase of Nd0.8Sr0.2NiO2 (obtained by reducing Sr doped NdNiO3 films) and their similarity to the cuprates high temperature superconductors. Here, we report on the observation of a new type of transport in oxygen poor Nd0.8Sr0.2NiO3−δ films. At high temperatures, variable range hopping is observed while at low temperatures a novel tunneling behavior is found where a Josephson-like tunneling junction characteristic with serial resistance is revealed. We attribute this phenomenon to coupling between superconductive (S) surfaces of the grains in our Oxygen poor films via the insulating (I) grain boundaries, which yields SIS junctions in series with the normal (N) resistance of the grains themselves. The similarity of the observed conductance spectra to the tunneling junction characteristic with Josephson-like current is striking, and seems to support the existence of superconductivity in our samples.

Path Deduction and Countermeasure Analysis of Tunneling Behavior of Major Shareholders of ST Protruly Company

In recent years, China's listed companies make use of the defects of the information disclosure system, using direct or indirect means such as the appropriation of enterprise funds to carry out large tunneling cases are frequently exposed. Based on ST Protruly company, this paper analyzes the path of its major shareholders to implement the hollowed out behavior from the four perspectives: large prepaid accounts, large accounts receivable, large illegal guarantee and huge foreign investment, and then puts forward the measures to restrain the hollowed out behavior of major shareholders of ST Protruly company.

Research on the semiclassical theory and Hawking tunneling radiation of nonstationary Kerr black hole

In this paper, the tunneling radiations of spin 1/2 and spin 3/2 fermions from the nonstationary Kerr black hole are investigated. First, according to the Dirac equation and the Rarita–Schwinger equation, the Hamilton–Jacobi equations for spin 1/2 and 3/2 fermions are derived. Then, the tunneling behavior of fermions on the event horizon of the black hole is investigated. Finally, the thermodynamic properties of the nonstationary Kerr black hole are obtained.

New rearing method, life cycle, tunneling behavior and ecological notes on the splendid ghost moth Aenetus djernaesae Simonsen, 2018 from Western Australia (Lepidoptera: Hepialidae)

This study successfully documents, for the first time, the entire life cycle of Aenetus djernaesae Simonsen, 2018 and confirms the efficacy of using supplemental sources of fungi to feed the early instar larvae. Fresh cut pieces of the commercial mushroom Agaricus bisporus (J.E. Lange) and sections of Eucalyptus L’Her. bark were placed around the base of potted host plants –Myoporum insulare R.Br. (Scrophulariaceae) and the potential host plant Dodonea hackettiana W.Fitz. (Sapindaceae). First instar larvae were added to this matrix where they fed on the mushroom and bark. The life cycle comprised egg development of 20 days, fungal feeding of ~36 days, and host plant development (including pupal) of ~300 days. Adult emergence of reared and field collected samples occurred within a 22 day period. Larvae transferring from fungi to host plants transitioned during the night by constructing a web of silk and plant tissues within two hours and proceeding to excavate a tunnel from within. The mature larval tunnel is relatively short, up to 220 mm in length and usually extending below the entrance around which the larvae grazes on callus tissue forming after bark removal. Most adults emerged within an hour of dusk with the pupa protruding from the top of the vestibule. The rearing method described here demonstrates the feasibility of laboratory based studies of larval development in Aenetus Herrrich-Schäffer and other callus-feeding stem boring Hepialidae. Key words: Hepialidae, Aenetus, life cycle, artificial diet, Myoporum, Dodonea, larval foodplant

Mutual funds, tunneling and firm performance: evidence from China

In contrast to US companies, Chinese firms have concentrated ownership with the effect that the central agency problem emanates from controlling shareholders expropriating minority shareholders, a phenomenon referred to as ‘tunneling’. This study examines the monitoring effect of mutual funds on the tunneling behavior of controlling shareholders. Due to the distinctive institutional settings in China, including a high level of ownership concentration, underdeveloped legal system in the stock markets and weak governance mechanisms in the mutual fund industry, we find that an increase in mutual fund ownership effectively mitigates the tunneling behavior of controlling shareholders thus improving firm performance. Nonetheless, after the mutual fund ownership reaches a certain threshold, an increase in concentrated mutual fund ownership is associated with heavier tunneling and lower firm performance. This may suggest that concentrated mutual funds collude with controlling shareholders in order to preserve their private interests. Moreover, the above effects are found to be more pronounced for firms with heavier tunneling activities. Our finding of the non-monotonic monitoring role of mutual funds brings attention to the private interest theory for mutual funds, an aspect that has been largely ignored in previous studies on mutual funds.