On the recovery process of the groundwater depression cone in a high permeable aquifer

The shape and recovery process of the groundwater depression cone in a high permeable aquifer which has a steep inclination water table, are different from those in a gentle area. As an example, the author investigated the characteristics and movement of the influence circle caused by the yield of a very large quantity of groundwater due to digging for building construction. In the case of an inclined groundwater table as in a fan, the influence circle caused by the yield of groundwater by a well is in general deformed and elongated in the downstream direction. As a result of the present study, it can be said that the same pattern occurs in conjunction with the yield of a very large quantity of groundwater such as by digging for construction, althogh there are some differences in relation to the nature of the aquifer condition and recharge mechanisms. Moreover, after decrease or stop of the groundwater yield from the digging site, the influence circle did not disappear soon, but remained for several days more after the stop of the yield. The groundwater table recovered from upstream as if a flood wave and the center of the influence circle moved downstreem at almost the same rate as the natural velocity of the groundwater flow in the area.Article信州大学理学部紀要 18(1): 31-43(1983)departmental bulletin pape

Stay in the U.S. or Return Home: A Qualitative Examination of the Decisionmaking Process of Nigerian Doctoral Students and Recipients

Like many developing countries, Nigeria has suffered from an extensive “brain drain” as its most able young people, especially those at the graduate or doctoral levels, seek educational and career opportunities in the mature Western economies. While other developing nations, especially China, have taken concrete action to stem and even reverse their brain drain, Nigeria has been slow to act. This study sought to illuminate the situation of Nigerian doctoral students in the Diaspora in order to chronicle how they wrestle with decisions about returning to the homeland as a means of formulating effective strategies for repatriation or, at least, constructive engagement with the Diaspora’s human resources. Many Nigerian doctoral students are faced with the following questions: Where do I go for graduate education? What do I study that will set me up for success? Where do I go after graduation, and what do I do? What attracts skilled manpower to the U.S. and affects their decision to stay or leave the host country to start their careers upon graduation? This research examines the determinants of sixteen Nigerian doctoral students and recipients’ non-return and return intentions following the completion of their doctoral study in the U.S. Non-return is a type of brain drain. This study explored the experiences of Nigerian-born nonimmigrant doctoral students and recipients in U.S. universities and how they decide on their school, location, and field of study. It included a review of previous research on factors that influence Nigerian students who came to the U.S. for higher education and the processes, content, and outcome of their decision to either remain in the U.S. or return to the homeland after completing their studies. It also examined the challenges and opportunities that informed their decisions. A summary of trends in stay rates, human capital theory, migration, and the application of the brain drain concept is provided. The study concludes by highlighting the factors that elucidate the reasons Nigerian nonimmigrants or temporary residents migrate to the U.S. and decide to either remain there or return to their homelands after graduation

The Imperative of Accounting Ethics in the Adoption of Fraud Preventive Measures in Nigeria

This study examined the imperative of accounting ethics in adopting fraud preventive measures in Nigeria. To achieve this objective, the survey research design was adopted while primary data was sourced through structured questionnaire. Data collected were analyzed using Descriptive statistical tools (tables, frequency distribution and percentages) and Spearman’s Nonparametric Correlation.  It was discovered that the effectiveness of other fraud preventive measures depends to a large extend on the level of ethical compliance by accountants. Findings also revealed that compliance with ethical codes is an effective way to prevent fraud. Hence, strict enforcement by relevant professional bodies will increase the compliance level, thereby reducing the incidences of fraud in Nigeria. It was concluded that accounting ethics plays significant role in the adoption of fraud preventive measures in Nigeria. Therefore, it is recommended that organizations should adopt measures that will encourage accountants to discharge their responsibilities in accordance with the requirements of the ethical code without undue influence or pressure from management. Furthermore, accounting bodies should put in place strict monitoring and disciplinary measures that will ensure compliance with ethical principles. This will restore the confidence and reputation of the accounting profession as trustees and watchdogs of the society. Keywords: Accounting ethics, fraud, fraud prevention DOI: 10.7176/EJBM/13-1-05 Publication date: January 31st 202

Lattice-form dependent orbital shape and charge disproportionation in charge- and orbital-ordered manganites

The orbital shapes and charge disproportionations at nominal Mn$^{3+}$ and Mn$^{4+}$ sites for the charge- and orbital-ordered phases have been studied on half-doped manganites Pr(Sr$_{0.1}$Ca$_{0.9}$)$_2$Mn$_2$O$_7$ and Eu$_{0.5}$Ca$_{1.5}$MnO$_4$ with double-layer and single-layer Mn-O networks, respectively, by means of x-ray structural analyses, in comparison with Pr$_{0.5}$Ca$_{0.5}$MnO$_3$ with the pseudo cubic network. In a single-layer Eu$_{0.5}$Ca$_{1.5}$MnO$_4$ system, the ($y^2-z^2$)/($z^2-x^2$)-type orbital shape is observed, while the ($3y^2-r^2$)/($3x^2-r^2$)-type orbital shape in a pseudo cubic Pr$_{0.5}$Ca$_{0.5}$MnO$_3$ system. In a double-layer Pr(Sr$_{0.1}$Ca$_{0.9}$)$_2$Mn$_2$O$_7$ system, the orbital shape is found to undergo a large change upon thermally induced rotation of orbital stripe. Furthermore, clear charge disproportionation is observed for the pseudo cubic and double-layer systems, while not in the single-layer system. These results indicate that the orbital shape and charge disproportionation are sensitive to the dimension of Mn-O network.Comment: 12 page, 5 figures, 11 table

Stay in the U.S. or Return Home: A Qualitative Examination of the Decisionmaking Process of Nigerian Doctoral Students and Recipients

Like many developing countries, Nigeria has suffered from an extensive “brain drain” as its most able young people, especially those at the graduate or doctoral levels, seek educational and career opportunities in the mature Western economies. While other developing nations, especially China, have taken concrete action to stem and even reverse their brain drain, Nigeria has been slow to act. This study sought to illuminate the situation of Nigerian doctoral students in the Diaspora in order to chronicle how they wrestle with decisions about returning to the homeland as a means of formulating effective strategies for repatriation or, at least, constructive engagement with the Diaspora’s human resources. Many Nigerian doctoral students are faced with the following questions: Where do I go for graduate education? What do I study that will set me up for success? Where do I go after graduation, and what do I do? What attracts skilled manpower to the U.S. and affects their decision to stay or leave the host country to start their careers upon graduation? This research examines the determinants of sixteen Nigerian doctoral students and recipients’ non-return and return intentions following the completion of their doctoral study in the U.S. Non-return is a type of brain drain. This study explored the experiences of Nigerian-born nonimmigrant doctoral students and recipients in U.S. universities and how they decide on their school, location, and field of study. It included a review of previous research on factors that influence Nigerian students who came to the U.S. for higher education and the processes, content, and outcome of their decision to either remain in the U.S. or return to the homeland after completing their studies. It also examined the challenges and opportunities that informed their decisions. A summary of trends in stay rates, human capital theory, migration, and the application of the brain drain concept is provided. The study concludes by highlighting the factors that elucidate the reasons Nigerian nonimmigrants or temporary residents migrate to the U.S. and decide to either remain there or return to their homelands after graduation

Growth of Antiperovskite Oxide Ca3SnO Films by Pulsed Laser Deposition

We report the epitaxial growth of Ca3SnO antiperovskite oxide films on (001)-oriented cubic yttria-stabilized zirconia (YSZ) substrates by using a conventional pulsed laser deposition (PLD) technique. In this work, a sintered Ca3SnO pellet is used as the ablation target. X-ray diffraction measurements demonstrate the (001) growth of Ca3SnO films with the antiperovskite structure and a cube-on-cube orientation relationship to the YSZ substrate. The successful synthesis of the antiperovskite phase is further confirmed by x-ray photoemission spectroscopy. These results strongly suggest that antiperovskite-oxide films can be directly grown on substrates from the target material using a PLD technique

コウカテキナ アウトプット カツドウ オ オコナウ タメノ モバイル デバイス カツヨウホウ ケンキュウ: iPad ト Moodle ノ レンケイ

This paper reports on the latest development of a Moodle module called　“VideoBoard,” which is designed to upload and share video content. Video　postings recorded either on a mobile device, such as an iPad or Android　tablet, can be shared and evaluated within a Moodle course, encouraging　interaction among students and instructors. This latest version of VideoBoard　includes functions such as feedback in the form of rubrics and better　compatibility with mobile devices. It is hoped that this module can help　students reflect on their output skills and develop them further in speaking　and presentation-based courses

Fe-doping-induced evolution of charge-orbital ordering in a bicritical-state manganite

Impurity effects on the stability of a ferromagnetic metallic state in a bicritical-state manganite, (La0.7Pr0.3)0.65Ca0.35MnO3, on the verge of metal-insulator transition have been investigated by substituting a variety of transition-metal atoms for Mn ones. Among them, Fe doping exhibits the exceptional ability to dramatically decrease the ferromagnetic transition temperature. Systematic studies on the magnetotransport properties and x-ray diffraction for the Fe-doped crystals have revealed that charge-orbital ordering evolves down to low temperatures, which strongly suppresses the ferromagnetic metallic state. The observed glassy magnetic and transport properties as well as diffuse phase transition can be attributed to the phase-separated state where short-range charge-orbital-ordered clusters are embedded in the ferromagnetic metallic matrix. Such a behavior in the Fe-doped manganites form a marked contrast to the Cr-doping effects on charge-orbital-ordered manganites known as impurity-induced collapse of charge-orbital ordering.Comment: 8 pages, 7 figure