Genetic diversity of black mangrove (Rhizophora mucronata Lamk.) based on morphological markers in Maros, Pangkep, and Barru Provenances

Mangrove forests are tropical and subtropical forests that grow typically along the coast or river estuaries. Black mangroves are a type of mangrove found in South Sulawesi, precisely in Maros, Pangkep, and Barru Districts. The decline in black mangrove populations overcomes the threat limit to germplasm which can lead to reduced genetic diversity in black mangrove plants. To reduce the incidence of extinction in black mangroves, information on genetic diversity using one of the markers is required, namely morphological markers in taking samples of tree parts taken, namely the leaves, stems, and roots which are then for monitoring carried out in the Biotechnology Laboratory and tree breeding. The method used in this study is based on the literature on the development of the Tropical Fruit Descriptor information system. The results of the three studies proved that there is a difference between the evidence and the interprovenencies. The very close morphological kinship between them proved to be found in Pangkep. Pangkep’s provenance has a high coefficient compared to the proof of Maros and Barru, which is at the time level of 70%, while the proof of Maros has the lowest coefficient compared to the proof of Barru and Pangkep, which is at the gathering level of 64%.

Daily caloric restriction limits tumor growth more effectively than caloric cycling regardless of dietary composition

Cancer incidence increases with age and is a leading cause of death. Caloric restriction (CR) confers benefits on health and survival and delays cancer. However, due to CR’s stringency, dietary alternatives offering the same cancer protection have become increasingly attractive. Short cycles of a plant-based diet designed to mimic fasting (FMD) are protective against tumorigenesis without the chronic restriction of calories. Yet, it is unclear whether the fasting time, level of dietary restriction, or nutrient composition is the primary driver behind cancer protection. Using a breast cancer model in mice, we compare the potency of daily CR to that of periodic caloric cycling on FMD or an isocaloric standard laboratory chow against primary tumor growth and metastatic burden. Here, we report that daily CR provides greater protection against tumor growth and metastasis to the lung, which may be in part due to the unique immune signature observed with daily CR.

Slow-burning instabilities of Dufort-Frankel finite differencing

DuFort–Frankel averaging is a tactic to stabilize Richardson’s unstable three-level leapfrog timestepping scheme. By including the next time level in the right-hand-side evaluation, it is implicit, but it can be rearranged to give an explicit updating formula, thus apparently giving the best of both worlds. Textbooks prove unconditional stability for the heat equation, and extensive use on a variety of advection–diffusion equations has produced many useful results. Nonetheless, for some problems the scheme can fail in an interesting and surprising way, leading to instability at very long times. An analysis for a simple problem involving a pair of evolution equations that describe the spread of a rabies epidemic gives insight into how this occurs. An even simpler modified diffusion equation suffers from the same instability. Finally, the rabies problem is revisited and a stable method is found for a restricted range of parameter values, although no prescriptive recipe is known which selects this particular choice. doi:10.1017/S1446181121000043

STRUCTURAL PARADIGM OF INNOVATIVE AND INVESTMENT PARTNERSHIP

The article is focused on finding a new and modification of the existing paradigms of the innovative and investment partnership formation. The article studies the perspective key members of innovative partnership, their roles and possible cooperation effects. The attention is focused on the choice of directions of the innovative process realization depending upon the comparative assessment of approaches and the innovation commercialization expenses. The author outlines the direct and indirect form of the innovative partnership: «enterprise — university» and «enterprise — innovative mediator — university». The analysis of the profit-making channels in each chosen type of cooperation is provided. The globalization and capital concentration platforms preceding the integration partnership agreements are outlined and analyzed. To build up a separate adaptive paradigm of the innovative partnership the factors of the inner and outer environment forming the barriers for the realization of successful innovation partnership models are analyzed. It was found that one more factor to be considered when choosing the forms of innovative partnership between the parties concerned is the payback from the innovation commercialization, Its amount will be impacted by the objective factors of the currency depreciation in time, level of the sci-tech progress development, facilitation of the state policy, selected priorities of the national strategies, etc. Concerning the subjective factors, they fall within the variety of behavioral characteristics of an individual. It is stated that the formation of the innovative partnership is closely connected with the regional peculiarity of the location of enterprises, institutions and organizations. It is suggested to outline the innovative export-oriented and innovative import-dependent regions of the country. This feature will cover the possibilities of acquisition of innovations, knowledge and experience, and resources for their realization from the inner and outer markets. One of the factors of the commercial success achievement with the chosen form of the innovative partnership is the Blue Ocean Strategy which will allow studying the market more in detail and find the market niches in need of such new integrative formations. The incorporation of spin-off and spin-out companies is outlined as an efficient direction of the innovative partnership grounds realization. The article was prepared with the application of the following methods: expert appraisal, analysis and synthesis, economic experiment and scientific abstraction as well as graphic and logical methods. Keywords: innovative partnership, innovative process, innovation, business model of the innovative partnership, innovative mediator, innovation commercialization. JEL Classification L26 Formulas: 0; fig.: 3; tabl.: 2; bibl.: 12.

SLOW-BURNING INSTABILITIES OF DUFORT–FRANKEL FINITE DIFFERENCING

DuFort–Frankel averaging is a tactic to stabilize Richardson’s unstable three-level leapfrog timestepping scheme. By including the next time level in the right-hand-side evaluation, it is implicit, but it can be rearranged to give an explicit updating formula, thus apparently giving the best of both worlds. Textbooks prove unconditional stability for the heat equation, and extensive use on a variety of advection–diffusion equations has produced many useful results. Nonetheless, for some problems the scheme can fail in an interesting and surprising way, leading to instability at very long times. An analysis for a simple problem involving a pair of evolution equations that describe the spread of a rabies epidemic gives insight into how this occurs. An even simpler modified diffusion equation suffers from the same instability. Finally, the rabies problem is revisited and a stable method is found for a restricted range of parameter values, although no prescriptive recipe is known which selects this particular choice.

HearIt: Auditory-Cue-Based Audio Playback Control to Facilitate Information Browsing in Lecture Audio

Students often utilize audio media during online or offline courses. However, lecture audio data are mostly unstructured and extensive, so they are more challenging in information browsing (i.e., chaining, linking, extraction, and evaluation of relevant information). Conventional time-level skip control is limited in auditory information browsing because it is hard to identify the current position and context. This paper presents HearIt, which provides semantic-level skip control with auditory cues for auditory information browsing. With HearIt, users can efficiently change the playback position in the paragraph-level. Furthermore, two auditory cues (positional cue and topical cue) help grasp the current playback and its context without additional visual support. We conducted a pilot study with the prototype of HearIt, and the results show its feasibility and design implications for future research.

Do Digital Platforms Reduce Moral Hazard? The Case of Uber and Taxis

Digital platforms provide a variety of technology-enabled tools that enhance market transparency, such as real-time monitoring, ratings of buyers and sellers, and low-cost complaint channels. How do these innovations affect moral hazard and service quality? We investigate this problem by comparing driver routing choices and efficiency on a large digital platform, Uber, with traditional taxis. The identification is enabled by matching taxi and Uber trips at the origin-destination-time level so they are subject to the same underlying optimal route, by exploiting characteristics of the pricing schemes that differentially affect the incentives of taxi and Uber drivers in various circumstances, and by examining changes in behavior when drivers switch from taxis to Uber. We find that (1) taxi drivers route longer in distance than matched Uber drivers on metered airport routes by an average of 8%, with nonlocal passengers on airport routes experiencing even longer routing; (2) no such long routing is found for short trips in dense markets (e.g., within-Manhattan trips) or airport trips with a flat fare; and (3) long routing in general leads to longer travel time, instead of saving passengers time. These findings are consistent with digital platform designs reducing driver moral hazard, but not with competing explanations such as driver selection or differences in driver navigation technologies. We also find evidence of Uber drivers’ long routing on airport trips in times of surge pricing, suggesting that the tech-enabled market designs may not be binding in our setting. This paper was accepted by Chris Forman, information systems.