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The alveolinids were once highly widespread in the Cenomanian of the Tethys Basin. Even though evolutionary studies have, thus far, been conducted using material from many countries e.g. Spain, Oman, and the UAE, the Zagros region in SW Iran has not been studied yet. Two sections of the Sarvak Formation in the Pyun and Kuh‐e‐Zana areas were investigated. Five type levels can be identified in the Pyun section. The evolutionary trend begins with praealveolinids followed by ovalveolinids in the Early Cenomanian. Cisalveolinids firstly appear in the Late Cenomanian strata and then Multispirina is derived. Then Simplalveolina simplex appears, which is derived from Multispirina iranensis. At the Kuh‐e Zana section, the evolutionary trend was observed in three levels. There is no ideal evolutionary trend because Multispirina and Simplalveolina are absent in this section. The identified trends are similar to those of the Iberian Ranges in Spain.

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In the present study, over 3000 m of Upper Cretaceous sediments (Tarbur Formation) in seven stratigraphic, columnar sections were studied. The area is located in the Zagros mountain ranges of southwestern Iran, attributed to the converging continental Arabian Shield, and is interpreted as the result of subduction and collision. Based on foraminiferal studies of the Tarbur Formation in the sections, we have established many new biozones in the stratigraphic sections. However, investigations of the biozones indicate that there is no lithostratigraphic variation between the Upper Cretaceous and Lower Paleocene sediments in some of the studied sections. The concept of widespread formations and lithologic correlations is not applicable in this area, probably as a result of the tectonic unrest at that time. The biostratigraphic boundary between the Cretaceous and the Lower Paleocene is nevertheless well defined by the intraformational boundary in the sections.

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The Kazhdumi Formation is one of the most significant rock units in the Bangestan Group in Zagros Basin. In this study, one section of the Kazhdumi Formation (Kuh-e-Rahmat) was selected for research. The section is extended approximately 89 m thick. The lower lithostratigraphic limit of the Kazhdumi Formation is marked by an oxidized zone, while the upper boundary is described as gradational type. The stratigraphic distribution of foraminifer taxa confirms two biozones in the studied section: Hemicyclammina sigali and Mesorbitolina subconcava in the Assemblage Zone and Mesorbitolina aperta in the range zone. Based on the investigated calcareous algae, Trinocladus tripolitanus, Range Zone is described. The identified calcareous algae are well distributed along Kazhdumi Formation. According to the received data of the established biozones, the age of the Kazhdumi Formation is Albian.

In this paper, the problem of stable energy-efficient partner selection in cooperative wireless networks is studied. Each node aims to be paired with another node so as to minimize the total energy consumption required to meet a target end-to-end signal-to-noise ratio requirement and thus maintain quality of service. Specifically, each node ranks every other node in the network according to their energy saving achievable through cooperation. Two polynomial time complexity algorithms based on the stable roommates matching problem are proposed through which nodes are paired according to their preference lists. The first algorithm, denoted Irving's stable matching, may not always have a stable solution. Therefore, the second algorithmwhich is a modified version of Irving's algorithm and denoted maximum stable matching-is proposed to find the maximum number of stable disjoint pairs. Simulation results are provided to validate the efficiency of the proposed algorithms in comparison with centralized energy-efficient partner selection as well as other matching algorithms, yielding a trade-off between stability and total energy consumption, but comparable symbol error rate performance and network sum rate. M. W. BAIDAS AND M. M. AFGHAH controller, along with appropriate feedback channels in order to perform optimal partner/relay selection [3]. However, this may introduce significant delays and communication overheads. In ad hoc wireless networks, where a centralized controller does not exist, network nodes must exchange their CSI and follow a distributed algorithm for cooperation and/or partner selection, such that full network cooperative diversity is exploited. Additionally, the distributed algorithm must be carefully designed so as to reduce computational complexity at each node as well as the network communication overheads [4].There have been several research works considering partner pairing and relay selection in cooperative wireless networks. For instance, user pairing in network-coded cooperative networks is studied in [5] to maximize network throughput, reduce outage probability, and achieve fairness. In [6], optimal power allocation is studied to minimize overall network energy consumption rate by appropriately grouping users and setting their power levels to meet their QoS requirements. Furthermore, the authors study the locations of optimal partners and how they can be matched to maximize network energy gains. Energy-efficient relay selection based on relay locations for amplify-andforward networks is studied in [7]. Specifically, the authors devise a low-complexity algorithm to determine the approximate optimal locations and then select the relays that are nearest to these locations such that transmission power is minimized while achieving a specific symbol error rate (SER) requirement. In [8], the authors illustrate that the best-select relaying achieves significant gains in energy efficiency although it consumes more circuit power than direct transmission (DTX). Additionally, it has been shown that optima...