This study investigated the discharge coefficient in asymmetric rectangular labyrinth weirs. A dimensional analysis was carried out which showed that the discharge coefficient is a function of dimensionless parameters, such as the ratio of asymmetric widths of left and right cycles (wL/wR), the ratio of the total hydraulic head to the weir height (Ht/P), and the weir length ratio (B/w avg). The experimental results for the discharge coefficient were found to decline as wL/wR increased or B/w avg decreased. For wL/wR = 1.19, the ratio B/w avg = 2.76 improves the discharge coefficient by nearly 12.7% compared to B/w avg = 3.1. For wL/wR = 1.42, the ratio B/w avg = 2.76 improves the discharge coefficient by nearly 34.2% compared to B/w avg = 3.1. For wL/wR = 1.70, the ratio B/w avg = 2.76 improves the discharge coefficient by nearly 30% compared to B/w avg = 3.1.

ABSTRACT The genotype + genotype × environment (GGE) biplot methodology has the potential to determine combining ability effects, identify efficient testers, and distinct heterotic groups in a line × tester study. However, it has not been adequately applied for such analysis. Therefore, this study was done to assess the combining ability of some maize inbred lines and testers for grain yield, identify most efficient testers and classify inbred lines into heterotic groups using GGE biplot. Fifteen experimental single cross hybrids, generated from a 5 x 3 line by line × tester crosses procedure, were evaluated across seven sites in Iran in 2018 using a randomized complete block design with three replicates per entry at each site. According to the pooled analysis of variance, crosses showed significant differences for grain yield. Also, the differences observed among the testers, inbred lines, and interactions for the line × tester, crosses × environments, line x tester x environment was significant. The inbred line L4 was recognized as outstanding for its general combining ability (GCA) effect and the tester K18 was highly efficient based on its discriminating power. It can be concluded that the crosses of L4 x K47/3 and L4 x B73 are suggested to release high grain yield hybrids. Results of the GGE biplot analyses were close to the conventional line × tester method in combining ability and heterotic patterns of the yield of lines, grouping, and identification of testers.

ABSTRACT This article attempts to illustrate this educational method with the case of Iran’s borders in the south (disregarding its northern coasts) by Persian Gulf as a semi-closed sea and Oman Sea that pours into an ocean. The length of Iran’s coastlines is 1259 kilometers from Fav’s estuary to Bandar Abbas and 784kim thence to Gwadar Bay. In between, Persian Gulf is about 250 thousand square kilometers in area. There are seen numerous islands on these two breadths, especially Persian Gulf. In some of the cases, the waters between these islands and the coasts are envisioned as the internal waters and the source line of the territorial sea is delineated from the farthermost point of the coasts on these islands as a result of which the amount of the internal waters would be naturally increased and, in some other cases, these islands would have internal and territorial waters in terms of the distance set beyond Iran’s coast. The present article discusses the effects and outcomes of the 1982’s convention for the international sea rights on the states’ governance with an emphasis on and comparison to Iran. The foresaid convention is the product of several years of efforts by the various countries that have recently succeeded to get free of the colonialism chain and naturally demand their positions in the international conventions. This convention can be called the essential maritime law in terms of comprehensiveness and pervasiveness. The current article intends to figure out the conditions of Islamic Republic of Iran in case of joining this convention as well as now that it has not yet joined it. It is worthy to know that the convention is considered as a record holder in the history of the treaty law in regard of the number of enacting countries that have so far joined it and the speed of enactment and joining of the countries to it within a short period of time. That is because there are not so many treaties having been capable of solidifying their position in the international arena and breadth of the treaty law firstly with such a vastness and secondly with this number of the endorsing countries and lastly with such a speed.

RESUMEN Este artículo intenta ilustrar este método educativo con el caso de las fronteras de Irán en el sur (sin tener en cuenta sus costas del norte) por el Golfo Pérsico como un mar semicerrado y un Mar de Omán que se vierte en un océano. La longitud de las costas de Irán es de 1259 kilómetros desde el estuario de Fav hasta Bandar Abbas y 784 kilómetros desde allí hasta la bahía de Gwadar. En el medio, el Golfo Pérsico tiene aproximadamente 250 mil kilómetros cuadrados de área. Se han visto numerosas islas en estos dos anchos, especialmente el Golfo Pérsico. En algunos casos, las aguas entre estas islas y las costas se vislumbran como las aguas internas y la línea de origen del mar territorial se delimita desde el punto más alejado de las costas en estas islas como resultado de lo cual la cantidad de las aguas aumentarían naturalmente y, en algunos otros casos, estas islas tendrían por sí mismas aguas internas y territoriales en términos de la distancia establecida mucho más allá de la costa de Irán. El presente artículo analiza los efectos y resultados de la convención de 1982 sobre los derechos internacionales del mar sobre la gobernanza de los estados con énfasis y comparación con Irán. La convención mencionada es el producto de varios años de esfuerzos de varios países que recientemente han logrado liberarse de la cadena del colonialismo y, naturalmente, exigen sus posiciones en las convenciones internacionales. Esta convención puede llamarse la ley marítima esencial en términos de amplitud y omnipresencia. El presente artículo tiene la intención de descubrir las condiciones de la República Islámica de Irán en caso de unirse a esta convención, así como ahora que aún no se ha unido. Vale la pena saber que la convención se considera como un récord en la historia de la ley de tratados con respecto al número de países promulgadores que hasta ahora se han unido y la velocidad de promulgación y unión de los países a la misma en un corto período de tiempo. Esto se debe a que no hay tantos tratados que hayan sido capaces de consolidar su posición en el ámbito internacional y la amplitud de la ley de tratados, en primer lugar con tanta inmensidad y, en segundo lugar, con este número de países que respaldan y, por último, con tal velocidad.