Evaluating Crash Risk in Urban Areas Based on Vehicle and Pedestrian Modeling

This article presents a method for investigating the spatial distribution of vehicle and pedestrian traffic crashes relative to the volume of vehicle and pedestrian movement in urban areas. This method consists of two phases. First, vehicle and pedestrian traffic volumes on the street network are modeled using a space syntax configurational analysis of the network, land use data, and observed traffic data. Second, crash prediction models are fitted to the traffic crash data, using negative binomial regression models and based on traffic volume estimates and street segment lengths. The method was applied in two areas in Tel Aviv, Israel, which differ in their morphological and traffic characteristics. The case‐studies illustrated the method's capability in identifying hazardous locations on the network and examining relative crash risks. The analysis shows that an increase in vehicle or pedestrian traffic volume tends to be associated with a decrease in relative crash risk. Moreover, the spatial patterns of relative crash risks are associated with the design characteristics of urban space: areas characterized by dense street networks encourage more walking, and are generally safer for pedestrians, while those with longer street segments encourage more driving, are less safe for pedestrians, but safer for vehicles.     

Computing Abilities in Antiquity: The Royal Judahite Storage Jars as a Case-study

Studying the volume of ancient pottery vessels can shed light on the development of complex societies and state apparatus by revealing the means taken to standardize trade and taxation. It can also shed light on the cognitive abilities of ancient people by investigating their knowledge of computing. This paper explores, as a case study, the volume and shape of the lmlk (“belonging to the king”) royal storage jars, which probably represent the highest level of standardization in eighth century BCE Judah. To estimate the volume of these vessels we constructed a computer 3D model for each jar. The variation in the jars’ linear dimensions is about 2–3%, a number that is characteristic of human-made objects produced by professionals without employing measurement tools. Had the potters produced jars of the same height, they could have easily reached 3–4% accuracy in the volume. Surprisingly, the variation in the jars’ volume is 7–10%. We hypothesize that rather than height the potters focused on the jars’ shape and wall width, estimating the volume according to the jars’ outer measurements. We propose a simple way that these measurements could have been taken and suggest a formula that could have been employed by the potters and customers for quickly calculating a jar’s volume.     

Ancient standards of volume: negevite Iron Age pottery (Israel) as a case study in 3D modeling

Hand-made cylindrical vessels unearthed in excavations of Iron Age IIA sites in the Negev Highlands constitute the largest and most dominant ceramic assemblage of simple-shaped vessels found in Israel. The volumes and linear dimensions of these vessels were analyzed based on computer 3D models reconstructed according to their drawn profiles. This analysis revealed the rules that could have been employed by the ancient potters in order to produce vessels of given volumes. These rules demonstrate the human ability to reveal approximate (but inherent) geometric relationships between form and volume and deploy them in everyday life.     

The Twofold Literary Structure of the Chronistic David Narrative (1 Chr 11-29)*

This article deals with the Structure of the Chronistic David narrative in Chronicles (1 Chr 11-29). I seek to demonstrate a structural para-digm that arranges the Chronistic David narrative into two concurrent literary structures: a pyramid and a chiasm. Each structure expresses a different cen-tral objective, encompassing most of the narrative’s components. The pyra-mid structure reflects the process leading up to the construction of the Temple and culminates in chapter 28 with David’s ceremonious transferal of the Temple plans to Solomon. The chiastic structure revolves around the question of the Temple builder’s identity. Until chapter 17, David is characterized as a figure worthy of building the Temple. Nathan’s oracle in chapter 17 marks the narrative’s turning point: David rejected from building the Temple. From chapter 18 on the Chronicler seeks to justify David’s rejection, to temper Da-vid’s rejection and to create a smoother transition between the David narra-tive and the Solomon narrative.     

New Evidence of the Purple‐Dye Industry at Tel Shiqmona,Israel

Pottery sherds stained with purple dye were found in the excavations at Tel Shiqmona, and were dated to the Iron Age II period. Analysis by HPLC‐DAD identified the dye as ‘true purple’, derived from the Hexaplex trunculus sea snail, which is associated with the purple‐dye industry that flourished in the coastal area at that time. This result is compatible with the classification of over 1000 Muricidae shells that were found in the excavation. Hexaplex trunculus constitutes 80% of this group, indicating that it was the most commonly used species in the dye production at Tel Shiqmona.     

Minority–Majority Relations in the Schelling Model of Residential Dynamics. 住宅动态迁移Schelling模型中的少数‐多数关系

The Schelling model describing segregation between two groups of residential agents, reflects the most abstract, basic view of noneconomic forces motivating residential migrations: be close to people of “your own” kind. The model assumes that residential agents, located in neighborhoods where the fraction of “friends” is less than a predefined threshold value F, try to relocate to neighborhoods where this fraction is F or higher. For groups of equal size, Schelling's residential pattern converges either to complete integration (random pattern) or segregation, depending on F. We investigate Schelling model pattern dynamics as a function of F in addition to two other parameters—the ratio of groups' numbers, and neighborhood size. We demonstrate that the traditional integration–segregation pattern dichotomy should be extended. In the case of groups of different sizes, a wide interval of F‐values exists that entails a third persistent residential pattern, one in which a portion of the majority population segregates while the rest remains integrated with the minority. We also demonstrate that Schelling model dynamics essentially depend on the formalization of urban agents' residential behavior. To obtain realistic results, the agents should be satisficers, and the fraction of the agents relocating irrespective of the neighborhood's state should be nonzero. We discuss the relationship between our results and real‐world residential dynamics.