Abstract
Proto-Elamite writing system known as phase 2 in proto-writing system in the Iranian plateau. Unfortunately, in decipherment and interpretation of the Proto-Elamite texts, they are always Under the influence of their contemporaneous writing system, proto-cuneiform. With further study at this system, albeit they have a common ancestor, but we have to consider to its specific and unique properties like Ecological geography, subsistence system, social hierarchy and etc., that make this culture. 
Keywords: Proto-Elamite, Susa, Proto-Cuneiform, Tablet.

Introduction
During the early French excavations of Susa, more than 1600 texts and fragments were found and were recognized to be a very early writing system (Dyson, 1968), and called the Proto-Elamite writing system (Scheil, 1900). After a while, Proto-Elamite texts have been found at sites across Iran. Due to the nature of the available radiocarbon data, the Proto-Elamite tablets can only to be dated with confidence to around 3300-3000 BC (Dahl, 2014:24). Current archaeological research suggests that many important sites across Iran were abandoned around 2800 BC. However, there is no consensus of how we understand the data, and we can here only note that there exist no samples of writing from Iran between the disappearance of Proto-Elamite writing system around 2900 BC and the introduction of cuneiform around 2300-2200 BC (Ibid:26).
Since Proto-Elamite texts record administrative transactions within a cultural and economic setting which is not entirely unknown to us, and since the scribes who wrote the texts had inherited certain bookkeeping techniques the content-specific numerical system, from their western neighbours in Mesopotamia, we can decipher the content of many texts. In 1978-79, Joran Friberg proposed a partial decipherment of a group of texts based on the number of cereal products found in these texts, the use of specific numerical systems, and the resemblance to text from Mesopotamia. Building on the results of him Peter Damerow and Robert K. Englund, a few years later proposed several sign identifications. Years after them, Jacob Dhal, also proposed a partial decipherment of sheep and goat terminology in Proto-Elamite texts(Ibid).
Though all these decipherments are true for part of these texts, but they consist of the relationship with Mesopotamian writing systems. Following this article, we can find at least two texts that could not verify all their signs and numerical systems match with that decipherment, and they could suggest that we need to review the decipherments manner with more Accuracy and independent from Mesopotamian texts.

MDP31, 33 and MDP31, 27
Both are administrative Proto-Elamite clay tablets and first published by Roland De Mecquenem in 1949 and keep in Louvre Museum.
In the seventh entry of MDP31, 33 texts, there is a string of signs: M024+M004+M218+M263~b+M038~a, that shows the owner(s) name of products M263~a which count with 2 N01. Because of the fading, it also might be two strings of names, but the important thing is the sign M263~b appeared in the string of the names and its very common in other texts that one sign which represents as products or workers, used as a syllable of the names. The other important thing like MDP31, 27 is behind the tablet, where we had an entry that normally should be the total account, but the entry contains sign M243~g which does not appear in the rest of the text and counting with numerical signs: N39b+1N24+1N30C and this number is not equal with this tablet’s front text. So, we can offer that, this tablet is not about the accounting of few products and their final total, but it represented several products that they had been donated to the warehouse (maybe the elite warehouse) and the sign M243~g is an introduction for the module and its size which, each product counts with this. The other suggestion for this Inequality can be: the products accounting with another numerical system that could not be recognised for us by now. 
In MDP31,27, also, the above result could be true, but the other impressive difference in this text is the absences of the signs of owner(s) before product signs, which shows that all these products (grain and dairy which usually did not account together) belongs to the household or institute that came at header entry sign and that’s why the scriber didn’t need to separate them.

Conclusion
As a conclusion to sum up, the texts that were reviewed shows that hypothesis based on proto-cuneiform texts contemporary Proto-Elamite period which considered for the decipherment of these texts couldn’t be true and need more investigating.
In addition, the lake of material evidence from Proto-Elamite sites that showing their subsistence system and management system, hasty look and compare this period with its neighbors in Mesopotamia, Leads to more problems to its decipherment.
So, it’s worthy to consider in additional of Semantic structure, notice to the subsistence system, the economic and social hierarchy of the Proto-Elamite period.
So far, the assumption in the interpretation of Proto-Elamite texts has been revealed that everything on the tablet count should be accounted as their final total on the reverse the tablet exactly. But these two tablets presented that this rule might be a break and we might search on the new numerical system or consider them as text that contains products that offer to a warehouse, and this entrance wasn’t important as export from the warehouse or to have final total.

Abstract
The invention of writing is considered one of the hallmarks in the human eveloution. Writing has not been invented all at once. Indeed, it had a gradual process from the Neolithic period to the end of the fourth millennium BC. In its early stages, it was similar among the Middle Eastern cultures, but at the end of the fourth millennium BC and the formation of the states in Uruk, Khuzestan, and Fars, two writing systems (Proto-Elamite and cuneiform) were invented at a same time. Both scribes are rooted in a common communication system. Some words with exactly the same iconography are obtained in the scribes of two lands which have been translated with different semantic uses thank to the progress of decipherment. The purpose of this study is to investigate the phonetic structure between the common early scribes in the second half of the fourth millennium BC in West Asia, which paves the way for the emergence of literature in the coming centuries. By using a descriptive-analytical methodology, the authors try to deduce that the reason for the similarities in the writing systems of the both areas is becuause of their identical roots by finding the roots of writing in two lands and examining the reasons for the formation of the first differences arising from understanding the environment and archaeological data. Also, the reason for the semantic differences of the words with the same iconography is due to the diversity of social and subsistance changes between the Iranian plateau and southern Mesopotamia, as well as the linguistic differences between the two regions. 
Keywords: Proto-Writing, Cuneform, Proto-Elamite, Susa, Phonetic Value.

Introduction
There are various theories about the origin of writing in Iran and the Middle East. Some argue that with the advancement of agriculture, rapid economic growth and lack of confidence in memory, the loss of many business and accounting information, and over-complexity of computing and business communications, the need to preserve information had increased. It was necessary to invent a way to maintain them. The invention of writing was not revolutionary nor suddenly is taken by an individual at a certain time; rather, it has evolved over several thousand years, and the period of Susa II and the emergence of complex societies and the specialization have greatly contributed to its growth. In the second half of the fourth millennium and early third millennium BC, tokens became more advanced, and were made in various forms with economic themes and were used in trade, then, the clay envelopes, also called bullae, became frequent. This clay envelopes date back to the mid-fourth millennium BC. Following the develepomental procees of the administrative system, the numerical tablets were invented.  

Disscussion 
The stages of writing up to the Susa II (Uruk) period were exactly the same, and from this period onwards the difference between the two scribes becomes apparent. The only major change of this period is the formation of a dense community in southern Mesopotamia. Since many ideograms were taken from the symbols around the environemnt, to better understand the roots of these differences, we need to fully understand the climate, environment and archaeological data of the two regions to comprehend these differences by taking the the environmental variety into account.
A) Mesopotamian climate in the fourth millennium BC: Mesopotamian communities due to alluvial soil and rich in minerals and nutrients that river water was washed from the surrounding mountains, in the field of agriculture and grain collection had access to surplus. On the other hand, the existence of large gardens near the permanent and water-rich rivers of the Tigris and Euphrates, vast pastures for sheep, goats and cattle, as well as abundant fish, poultry and wild animals for hunting, etc., led to extensive progress compared to other areas. In the fourth millennium BC, the population in these areas increased enormously, while the city of Uruk reached an area of about 2.5 square kilometers. Of course, there is no direct evidence of the exact number of inhabitants of Uruk, but with the help of anthropological data from the pre-modern Middle East, 100 to 200 inhabitants per hectare has been accepted for the residential sector. Apart from the the central monumental area of Uruk, It has reached approximately 230 hectares in the residential sector, which refers to the population of 25,000 to 50,000 people in Uruk in the late fourth millennium BC. Over 90 percent of the tablets were found in the garbages of the Temple of Eanna (the largest religious monuments of Uruk) presenting that this scribe was only used by a gropu of elites of the Mesopotamian society.
B) Climate of Iran in the fourth millennium BC: Iran is a clear example of the impact of natural structures on the cultural development. Iran is one of the arid lands of the ancient world and this determines the climatic relations of this land and the climate of its different regions. The summer heat in the lowlands forces people to migrate to the highlands with their herds. Due to the climatic conditions in these areas, a large part of the inhabitants of valleys and foothills are forced to live in their tents. Among the most important nomadic areas, we can mention Dar Khazineh, Tal-e Bakun and some settlements of Ramhormoz in the fifth to third millennium BC.

Conslusion
Management system has been one of the needs of human social development since the Neolithic period onwards which in the fourth millennium BC this need was felt quite clearly and at a high level, which led to a significant development of management in West Asia. At this time, the formation of different systems of government between the Iranian plateau and Mesopotamia probably led to the formation of different management systems, but since for more than four thousand years, both regions had used a completely identical writing system, it is not far-fetched that the two different types of scribes are affected by common roots and have evolved according to the management needs of their environment.
As was said before, In Mesopotamia the scribe was only used by a group of elites. Hence, the ideogram and pictogram were enough to respond the needs of conveying a message. But in Iran, due to the special climate in the past, it was devoid of the centralized populations; instead the main populations were scattered in different parts of the Iranian plateau and the use of this scribe was over an area of one million square kilometers from the Shahr-e Sokhte in Sistan, Tepe Yahya in Kerman, Tepe Ozbaki in Qazvin plain and Tepe Sofalin in Tehran to Tal-e Malyan and Susa in southwestern Iran which probably there were different ethnicities and dialects in these areas. Due to the scatterness of proto-writing caly tablets in different part of Susa, one can conclude that this scribe became common in the society to respond to the needs of such a large society. Consequently, a scribe with the use of pictograms and ideograms was invented. We believe, according to the percentage of repetitions, the phonetic use of this scribe is probably high, and since this scribe was common among the different tribes of the Iranian plateau, perhaps with the phonetic use, it was effecient to convey meaning from different languages on the Iranian plateau in the second half of the fourth millennium BC.

Abstract
One of the most important and controversial prehistoric cultural periods is Proto Elamite period, which can be considered as a revolution in the development, growth and development of communication and interaction of the people of that period, in the period of 3300 to 3000 B.C Many changes took place in this golden age, which itself is due to the existence of political and social complexities. During this period, livestock unions were formed, which had an Proto Elamite  writting on the inscriptions of this period. The union’s livelihood was based on animal husbandry. The economies of monogamous and farming communities are fully integrated with the livestock nomadic economy, and farmers are therefore the direct economic dependents of nomadic unions. Of course, it goes without saying that nomadic ranchers also need farmers, but this was not always the case. Farmers provided some of the farmers’ grains, but the farmers continued to cultivate. They usually had rainfed agriculture. But in general, the most important livestock economy is herding, and farmers needed to migrate to find forage, and on the other hand, the very hot weather in the area of Susa was not tolerable for livestock, and farmers had to migrate to colder areas. The inscriptions are very important in this cultural period. Inscriptions changed from counting mode to scrolls for managing office and animal documents that were thought-provoking. One of the most significant areas of the fourth millennium BC is the area of Susa, which in this period has a lot of livestock inscriptions. In this article, the authors try to analyze the type and number of livestock inscriptions, the existence of a nomadic union, and subsequently the bipolarity of the Susa community in the early Elamite period.
Keywords: Fourth Millennium BC, Proto Elamite, Susa, Animal Husbandry, Inscription.

Introduction
Proto Elamaite refers to a period in history that chronologically shows 14 carbon samples obtained from millions of times between 3300 and 3000 BC.( Dahl et al, 2013: 358). But the end of this cultural period is not very clear yet (Pats, 1396: 99). Today, there are various sites from this period in Iran, some of which have been excavated, but according to the excavated sites, it covers a large part of the Iranian plateau, and so far 8 of its sites have been identified with an integrated writing standard.some of them like 1. Susa (Vallat, 1971) 2. Sialk (Ghrishman, 1938: XXXI) 3. Tal Geser (Alizadeh, 2014). Proto Elamite writing has an integrated structure in terms of form, writing and in terms of illustrating the ideas of the drawings. For example, in the field of animal texts, all of them have used a series of common or close signs, and in most cases, all of them have shown the difference between male and female goats, male and female sheep, and lambs with a single sign .Also, the same collection counting system is used.
Objective: To study the duality of the population of Susa (monogamous and nomadic) in the fourth millennium BC is based on the inscriptions of Proto Elamaite period, based on which it can be seen that Susa in Proto Elamate period is a bipolar society. Indigenous and probably in the same language, the Mesopotamian family is in the south of the Acropolis hill of Susa and a farming and pastoral community in the north of the Acropolis hill. Each nation provided the economic market for the other.
Research Questions: Has a union of animal husbandry communities been formed in Iran during Proto Elamaite period? Was Susa a community, farmer and cattle breeder in the Proto Elamite period?? What cultural connections have there been between livestock and monogamous communities?
Hypothesis: Considering the similarity of the structure and texts of Proto Elamite in the Iranian plateau, it can be seen that there was a connection between these areas and since the most consistency in the signs as well as the areas found in the herd. Early Elamite writings are related to animal texts, it can be seen that the livestock community may have played a role in this collection. These livestock communities in southwestern Iran were in close contact with Susa to meet their material needs, and probably half of Susa communities were forced to migrate to the highlands due to the large number of livestock in the warmer months of the year.
Research Method: In this research, the aim is to reconstruct the herdsman community living in the Susa area in the second half of the 4th millennium BC, which according to the statistical analysis of the number of livestock tablets compared to other Proto Elamite texts, shows that the most Note that these tablets have livestock provisions. In fact, it is possible to understand the type of livelihood of the Sush community in the Proto Elamite period from reading the tables, which is that the people of Sush were cattle breeders in the north of the hill and farmers in the south of the hill. The tablets obtained, which are mentioned in the research proposal, how to discover and decipher them, are very effective in achieving the goal of this research.

Proto Elamite inscriptions obtained from Susa
Proto Elamite inscriptions were first found in the excavations of Susa in 1900. (De Morgan, 1900: 130) Inscriptions are flattened clay fragments made by hand. They have formed. And are cooked at low heat or not cooked at all. In their study, the authors divided the Elamite inscriptions from Susa into two categories. One is the texts obtained from MDP.17, most of which were found from the north of Susa hill, and the other is the rest of the Susa inscriptions, which are generally obtained from the south of Susa hill. Demorgan’s large trench in MDP.6 had less than 10 percent of the animal texts But MDP.17 has the highest percentage of livestock statistics

Animal Texts of Susa
The content of all Elamite texts is administrative and related to the production, storage and distribution of the product (Dahl, 2015). In Proto Elamite texts, various signs are used for animals and livestock, but among them, only the sign of sheep and goat can be recognized with complete certainty due to the similarity with the example of the beginning of cuneiform can be distinguished from other animal signs. All livestock and domestic animal signs used in the herd are shown with abstract signs. Also, one of the most important factors related to livestock communities is the use of signs of livestock products.

Conclusion
Today, in the southwest of Iran, there are nomadic communities that have land in summer and winter, and apart from animal husbandry, whose main occupation is seasonal and rainfed agriculture, which does not meet the consumption of the whole year. And trade in livestock products and grains with the surrounding farming communities, and since the life of nomads depends on climate and environment, and since the end of the fourth millennium BC, major changes in water conditions and the weather in southwestern Iran has not happened. It is possible that the life of the nomads in Proto Elamite period was the same as now. By examining Proto Elamite tablets of Susa, it can be found that a significant part of them (nearly one third of the texts) are concepts related to wages, payment and in the field of livestock activity or collection and audit of livestock, and Attention is also regular with agricultural activity or payment of wages. By classifying the tablets and also according to the statistical concepts and percentages, it is determined that more than 32% of Proto Elamite texts obtained from Trench I of Domkenam in the north of the Acropolis hill are directly related to the counting and trading of livestock and may be part of the payment inscriptions whose goods Not specified, also related to livestock. According to Domkanem’s explanation, part of the inscriptions of the Great Trench of Damurgan is probably related to the texts of grain, storage and payment of labor wages, and at the time of publication, it was merged with a part of the tablets of the Great Trench in other Sush collections such as the book MDP.17 It has been reported that if they are separated, the number of livestock in the north of Shush Hill will probably reach a much higher number than %32. which in general can be understood the livelihood and life of the people of Susa in Proto Elamite period.

Abstract
Glaze is a prepared mixture of materials ready for application to ceramic wares by dipping or spraying. In Islamic period, decoration using the glaze was widespread. Different methods of glazing have played a major role in the beauty of glazed potteries during this period. Turquoise glazed potteries are one the significant groups of Islamic period. In this article, five turquoise glazed pottery sherds have been studied in order to identify their elements, composition and technology. The mentioned sherds dated back to 14 - 18 A.D (late Ilkhanate, Timurid and Safavid periods) , and identified from a historical house called Moravvej-e Ardabili House, in the historical part of Ardabil city. This site identified in a rescue excavation held by HassanYousefi which regarding to the cultural materials dated back to 11 - 18 A.D. The aim of this article is investigating and understanding the similarities and differences in five glazed sherds. Regarding to the mentioned point, XRD analyze applied for characterizing their phases as well as EDX analyze used for identifying the elements of glaze, and also their quantity. This research has an analytical approach and it’s method is based on analytical studies, textual evidences and comparative analyzes. According to the results obtained from analyzes, four glazes have an alkaline based and one has a lead base. Colorant oxides in glazes represent that copper used as the primary element to make the turquoise color. In general, the main elements in glazes include silica, aluminum, calcium, sodium, potassium and a negligible amount of lead. Statistical analyzes represent that the most similarities exist in sample two and sample five which belongs to the same period (late Ilkhanate and Timurid),and the most differences exist in sample four and sample five which dated back to a different periods. 
Keywords: Glaze, Turquoise, Moravvej-e Ardabili, XRD, EDX.

Introduction
In the prehistoric era, slip used as a sort of glaze in order to proof the body of the pottery, increase the aesthetical aspect of the pottery and protect the hand of the pottery maker to steak to the clay. In the historical period, using a transparent and colored glaze became widespread, but in the Islamic period the using of the glaze with various functions expanded. There are three main period in the evolution of the pottery in the Islamic era. 1. Early Islamic potteries 2. Middle Islamic potteies 3. Late Islamic potteries. During the rescue excavation in the Moravvej Historical House in Ardabil province in 2006, a vast number of pottery sherds mostly, belong to Seljuk to Safavid periods identified. This site located in the historical part of the city nearby the Sheikh Safi Al-Din Ardabili’s monument. Turquoise glazed potteries were the remarkable amount of the identified potteries in the above mentioned excavation. The questions of this article is on the subject of the turquoise glaze potteries; the amount and the type of the constructed elements ,and also study the similarities and differences between the glaze from different period. Five pieces (three sherds from 14-15 A.D and two sherds from 16-18 A.D) selected for the analytical studies with the aim of better understanding their constructed elements, technology and composition. In order to achieve to this aim, XRD and EDX analyses provided promising results about the technological aspects of the sherds, and also a comparative study not only was highly beneficial in clarifying the similarities along with differences of the composition of glazes, but also was helpful in better understanding of the turquoise glazes  in the larger region. Since there has not been applied any analytical study on the sherd identified from this site, this research would increase our knowledge about it. The pottery sherd divided into three categories, and then two samples from each category selected for the analytical studies. In the next step, technical characteristics of the sherds documented. After that, the pieces delivered to the laboratory for the analytical studies.  XRD analyses, was done in Razi Metallurgical Research Center using the Xpert Pro MPD system Panalytical model made in Poland. EDX analyses was done in Kansaran Binaloud Center using Micro Prob Horiba 7200 model made in Japan. Also, Peason Correlation Coefficient used for better understanding the correlation between different elements.

Discussion
Based on the XRD analyses, in the first sample dated back to the 14-15 AD, cristobalite, amorphous, quartz and silica were the main elements. Quartz, cristobalite and silica are the different phases of SiO2. Based on being buried,  the amount of silica decrease and the other elements increase which are shown as different picks. Quartz ingredients changed to the cristobalit as a result of increasing the temperature while baking. In the second sample dated back to the 14-15 A.D, calsite, quartz and silica phases reported. Quartz and silica represent SiO2, and calsite indicates the destruction process and release the alkaline ion from the glaze and formation on the surface of the glaze which regarding the date of the pottery and being buried, it seems reasonable. In the third sample from Safavid period , gypsum phase reported. The mentioned phase represent the destruction of the glaze as well as releasing the alkaline ion like calcium as a constructed element of the glaze. In the forth sample from Safavid period in addition to the silica and quartz, cesterite phase represnt SnO2 which functioned as a flatting element in the glaze. In the fifth sample dated back to the 14-15 A.D, in addition to silica and quartz phases, nepheline synenite was reported because of the slip. 
Based on the EDX analyses, copper functioned as the primary element for making the turquoise color. The amount of the copper in the samples is respectively 3/19%, 1/15%, 3/53%, 1/39% and 1/36%.  The glazes have an alkaline base since sodium, potassium, calsium, mangesium and stroncium was reported in EDX analyses; This means that the samples of this research have an alkaline base unless the sample four. The amount of lead in the samples respectively is 13%, 0/17%, 0/27% and 12/64%; this element was not reported in sample five. Comparing to the other samples, sample four shows a great amount of lead (12/64%), and also have 7/07% amount of tin. Calsium solfate was reported in the samples; the amount of this element is respectively 4/06%, 2/35%, 2/75%, 3/72% and 2/67% which mostly is as a result of the destruction during the decades. The first sample represents the most amount of the calsium solfate comparing  to the other samples. The aluminum is respectively 4/06%, 2/25%, 2/75%, 3/72% and 2/67% which indicates the destruction during time. The most amount of destruction belongs to sample one and then sample four and is almost equal in the other samples.
   
Conclusion
In Iran, the most ancient usage of glaze has been reported from the ancient site of Susa as well as Choghazanbil located in the southwestern part of country in Khuzestan province. In the Achaemenid period application of glaze on mud-brick of royal buildings was one the common architectural decoration methods. In Islamic period, decoration using the glaze was widespread since it can be seen in buildings namely masques, schools along with potteries. In general, the Islamic potteries can be divided into two distinct groups: glazed and unglazed potteries. In this article, five turquoise glazed pottery sherds have been studied in order to identify their elements, composition and technology. The mentioned sherds dated back to 14 - 18 A.D (late Ilkhanate, Timurid and Safavid periods), and identified from a historical house called Moravvej-e Ardabili House, in the historical part of Ardabil city. EDX analyses indicated that the copper is the main element which used for creating the turquoise color. It is respectively from sample one to five,  3/19%, 1/15%, 3/53%, 1/39% and 1/63% in the samples and shows that sample three have the most amount of the copper in the glaze. In addition to this, chromium has been used as a coloring oxide in this sample. chromium in the glazes is a key factor in order to making the different shades of green color and this is why the color of this sample is much more different than the other samples. Based on the analyses, glazes have an alkaline base as a result of  high amount of the alkaline elements such as potassium, sodium and calcium in all samples. The amount of lead compare to the alkaline elements is a negligible amount unless sample four which a considerable amount of lead (12/64%) was reported; The amount of lead is respectively from sample one to four, 13%, 0/17%, 0/27% and 12/64%;This element was not reported in sample five. Also, in sample five, nepheline syenite indicates using slip on the pottery. Regarding the statistical analyses, generally there is a signnificant correlation between the samples. The high amount of the correlation is in samples two and five dated back to 14-15 A.D as well as the less correlation is between sample four dated back to the Safavid period and sample five belongs to 14-15 A.D which is seems resonnable.

Acknowledgment
We are thankful of MS Nasim Feizi for her technical point of view in the statistical study in this article and also, Miss Habibeh Abbasi for her beneficial comments.

Abstract
South Rudbar Plain, with an area of more than 6000 square kilometers, is one of the important archaeological areas in the southeast of the Halil-Rood cultural area. This area, due to its favorable environmental conditions, including the permanent water of the Halil-Rood River, the fertile and vast plains, and the pasture heights in the northern part, as well as due to its geographical capacity and the communication route between Sindh and Sistan to Jiroft, was the foundation for the presence of human societies with the livelihood structures such as sedentary lifestyle and nomadic. As a result of two seasons of Archaeological surveys in South Rudbar plain during the last two decades, a number of ancient settlements were identified in this area. However, in these surveys, the focus is on pre-historic sites, while the sites of the Islamic era have not been studied deeply and completely, and only their GPS points have been recorded and incomplete descriptions of them have been provided. Therefore, answers have not yet been provided to questions about the role and influence of environmental factors on the distribution of Islamic settlements and the formation of livelihood organizations. In the following article, for the first time, the effect of environmental factors on Settlements of the Islamic era in Rudbar plain was studied with an analysis based on the findings of two archaeological surveys, documentary studies, and the preparation and interpretation of GIS maps. For this purpose, the settlements of Rudbar plain were divided into two time periods based on relative dating: “first to early middle Islamic centuries” and “late centuries (from the 10th century AH onwards)”. Then, environmental factors such as altitude above sea level, resources water, amount and direction of the slope of the lands, soil characteristics, and condition of roads in connection with settlement evidence were analyzed. The results of the research show that the most important factors affecting the formation, distribution, and organization of the livelihood of the Rudbar plain settlements in the Islamic era are the Halil-Rood River and the Aqueducts as the water sources in the peripheral parts, the trade route of Jiroft to Sind and Sistan, and the unevenness of the north and northeast for benefit from the potential of animal husbandry.
Keywords: South Roudbar, Environmental Factors, Distribution of Residence, GIS, Islamic Archaeology.

Introduction
The environment and its substrates are very important in examining the distribution pattern of ancient sites in a region. According to archaeological research, Rudbar plain has been a suitable place for human societies to live since at least the Copper Age (cf. Daneshi and Eskandari, 2016). This area as a commercial crossing (Yacoubi, 1963: 62) and one of the important areas of agricultural and livestock production (Sarhadi, 2017: 24), is very important in the archaeological studies of the Halil Road cultural area. However, the settlements of the Islamic era in the Rudbar plain do not have a share in the previous archeological studies and there are questions about this, which of the environmental factors and at what qualitative and quantitative level is effective in the distribution of settlements in the Rudbar plain in the south of Halil Roud cultural region during the Islamic era?
Based on this, the main purpose of this research is to investigate and analyze environmental factors affecting the formation and development of the Islamic settlements of Rudbar plain with a focus on geological features, altitude, water resources, and trade routes. Despite the numerous narratives of the early Islamic geographers about this region (see: Yaqoubi, 1963; Ibn Hawqal, 1966; Istakhari, 1994), no independent research has been done to identify and investigate the Islamic era settlements in Rudbar plain; and this issue shows the necessity and importance of this research. Also, the results of this research can help to understand the roots of the urban culture of this region in the early Islamic Middle Ages. 
The current research is historical research and a descriptive-analytical method was used. Research data has been collected by documentary and field methods. 

Discussion
The statistical database under study includes 53 sites and historical monuments, which are divided into two groups of settlement evidence, “first to seventh century AH” and “late Islamic centuries (Safavid and Qajar)” based on relative chronology (Tables 1 and 2). In order to explain the impact of environmental factors on the location of these sites and evidence, a geographic information system (GIS) has been used.

1. The effect of the height coefficient on the distribution of settlements
To explain the effect of height above sea level on the formation of the landscape and the distribution of the studied settlements, the height of the Rudbar plain is classified into eight classes (Figure 3, Chart 1). The largest number of cultural evidence representing the settlements of the Islamic era have been formed in this region at an altitude between 500 and 600 meters above the surface of open water, while only 4 sites have been found at an altitude of less than 400 meters above sea level. It seems that the large number of settlements at altitudes between 500 and 600 meters, which exactly covers the slopes of Rudbar Plain, is proof of the predominance of nomadic livelihoods in the Rudbar Plain during the Islamic era, and on the other hand, the small number of sites at an altitude of less than 400 meters can be analyzed in relation to the swampy condition of the Rudbar plain and the greater extent of the Jazmurian bed in the past.

2. The effect of water resources on the distribution of settlements
According to the maps obtained from GIS, most of the sites and evidence related to the settlements are located at a close distance from the surface water network, especially the Halil Rood River (Figure 4, Diagram 2). So, 17 sites, equivalent to 32% of the sites, were developed less than 5 kilometers away from Halil Rood River and under the direct influence of this water source. Another source of water is the Aqueduct. Among the sites of the Rudbar plain, especially those located on the edge of the plain and on the surface of the alluvial cone, were developed in connection with this water source (Figure 5).

3. The influence of the roads on the distribution of settlements
South Rudbar Plain was one of the important communication crossings of the Islamic era due to its location on the old communication and trade route from Indus to Jiroft (Yaqoubi, 1963: 62). According to the explanations of geographers about this ancient road, the current route of Rudbar to Iranshahr has been determined as a part of the aforementioned ancient route and the sites found have been investigated based on this route. As a result of this analysis, 17 sites with a significant linear extension in the west-east direction are located at a distance of 500 meters to 5 kilometers from this main communication road of the region (Figures 6 and 7, Diagram 3).

4. The influence of the slope of the land and its direction on the distribution of settlements
Based on the distribution map of sites and cultural materials related to the settlement of Islamic centuries in the Rudbar plain, we are facing a relatively flat land (Figure 8, Diagram 4). Regardless of the slope of the heights, we are facing a large and relatively flat plain where all the sites found were developed on a bed with a maximum slope of 5%. In fact, in terms of the relationship between the location of the sites and the slope of the land, no significant pattern can be defined. The settlements are located in various slope directions, including south, southeast, and southwest (Figure 9). Considering that the Rudbar plain is one of the tropical areas of the Halil River basin, it seems that the direction of the slope with a southern tendency is not logical. Therefore, it is clear that other environmental factors play a more important role in choosing a place of residence.

5. The effect of land use on the distribution of settlements
As a result of the land classification of Rudbar Plain based on the type of land use in the present era, four types of land use including pasture, agriculture, slopes, and the bed of Jazmurian Lake were investigated. Referring to the output map according to the type of land use, it seems that this factor played a decisive role in the distribution of settlements (Figure 10, Diagram 5). Considering the location of the settlements in connection with pasture and agricultural lands, the pattern of distribution can be interpreted in direct relation with the nomadic livelihood structure with a wider level and the agricultural structure with a smaller level during the Islamic era in the Rudbar Plain.

Conclusion
Rudbar plain is at the southern end of the Halil Rud cultural landscape and corresponds to the current city of Rudbar Jonoob. This region has been the foundation for the presence of human societies during the Islamic era due to its environmental talent, including the permanent water of the Halil River, fertile plains, and pasture heights, as well as being located on the ancient Sind-Jiroft trade route. Based on the analysis of settlement distribution and settlement evidence of the Islamic era and taking environmental factors into consideration, it seems that the cultural landscape of Rudbar plain during the Islamic era was mostly influenced by the variables of altitude, land use, and roads. As a result of the analysis, out of a total of 54 sites and settlement effects found, 50 points are affected by surface water sources such as Halil Rood River and aqueducts, as well as in connection with large pastures and small agricultural lands. Four other local evidence of settlement in the eastern end of the central plain, due to the lack of environmental facilities where they were formed, can only be explained in connection with the ancient road from Indus to Jiroft. Apart from these last four cases, the location of 13 sites/artifacts in the central plain of Rudbar, in addition to showing the relationship with other factors such as height and land use, has also been influenced by the road factor. In general, under the influence of the geographical and ecological factors of the Rudbar plain, the dominant livelihood of the people of the region during the Islamic era was formed based on providing resources through animal husbandry, agriculture, and trade.

The earliest evidence of human exploitation of the wild date palm in the Middle East dates back to the sixth and fifth millennia BCE. Despite the scarcity of archaeological data, it is commonly assumed that by the end of the Late Uruk period (ca. 3300–3100 BCE), the Sumerians founded the earliest date palm orchards. However, this hypothesis has thus far not been substantiated by scientifically verified and documented evidence, rendering the matter a subject of scholarly controversy. To date, since the Proto-Elamite script has not yet been fully deciphered, our knowledge of agricultural activities within Proto-Elamite society remains considerably limited. What has been learned so far regarding the structure of this society’s economic system is derived mainly from comparisons between signs found on Proto-Elamite clay tablets and comparable examples in Late Uruk Mesopotamian Proto-cuneiform tablets from the late fourth millennium BCE; signs that primarily pertain to labor activities, animal husbandry, and livestock products. This study outlines the phenotypic characteristics of the date palm that can be identified, and examines their similarities to known Proto-Elamite examples. The authors suggest signs representing date palms in the Proto-Elamite script and consider them as key resources for a better understanding of the subsistence economy of the Proto-Elamite period, an issue previously absent from the scholarly literature on this era. Employing a comparative approach, the article correlates the signs for palms in Proto-Elamite texts with contemporaneous and later Iranian, as well as Mesopotamian, visual motifs. By introducing these signs into the archaeological discourse of the Proto-Elamite period, the research enables a more accurate reconstruction of the economic system and assessment of the level of date-palm horticultural knowledge in southwestern Iran during the late fourth millennium BCE.