6 research outputs found
Model Seleksi Premi Asuransi Jiwa Dwiguna untuk Kasus Multiple Decrement
This article discusses a select survival model for the case of multiple decrements in evaluating endowment life insurance premium for person currently aged ( + ) years, who is selected at age with â„Ž years selection period. The case of multiple decrements in this case is limited to two cases. The calculation of the annual premium is done by prior evaluating of the single premium, and the present value of annuity depends on theconstant force assumption
Phosphorus-Containing Poly(ethylene terephthalate): Solid-State Polymerization and Its Sequential Distribution
A series of phosphorus-containing
copolyester prepolymers were first sythesized from dimethyl terephthalate
(DMT), ethylene glycol (EG), and 2-carboxyethyl (phenyl)Âphosphinic
acid (CEPPA) by molten transesterification and polycondensation, and
then solid-state polymerization (SSP) was conducted for different
reaction times (<i>t</i><sub>SSP</sub>) so as to prepare
higher molecular weight copolymers. The intrinsic viscosity was increased
with the increase of <i>t</i><sub>ssp</sub>, but decreased
with the increase of CEPPA content. The sequence distribution of resultant
copolyesters was analyzed by <sup>1</sup>H NMR. It was found that
the randomness of copolyesters was decreased after SSP, and the transesterification
occurred mainly at the ester bonds formed by CEPPA and EG, resulting
in the chain growth. DSC results showed that SSP treatment was favorable
to enhance the crystallization ability of the obtained copolyesters
Thermal Transition Behavior, Thermal Stability, and Flame Retardancy of Low-Melting-Temperature Copolyester: Comonomer Effect
Phosphorus-containing
polyÂ(ethylene terephthalate-<i>co</i>-diethylene terephthalate)
(PEDT) with a low melting temperature
was synthesized through esterification and copolycondensation of terephthalic
acid, ethylene glycol, diethylene glycol (DEG), and 3-(hydroxyphenylphosphinyl)Âpropionic
acid (HPPPA). DSC results showed that PEDTs still were crystallizable
and that the lowest melting temperature of the PEDTs was reduced to
118.0 °C although the chain regularity was destroyed by the incorporation
of comonomers. It was found that the addition of HPPPA can improve
the thermal oxidative stability of copolyesters. The results of the
limiting oxygen index (LOI) test, the UL-94 vertical test, and the
cone calorimeter test indicated that HPPPA endowed PEDT with good
flame-retardant properties. The LOI values of the PEDTs were increased
to 30.5–34.8, the UL-94 ratings of vertical burning were improved
to V-0, and both the peak heat release rate (pHRR) and the total heat
release (THR) obviously decreased
Forest plots comparing rates of toxic effects for the CCRT group and RT alone group.
<p>(A) Rate of acute toxic effects. (B) Rate of late toxic effects.</p
Forest plots comparing rates of (A) persistence and recurrence, and (B) distant metastasis, between the CCRT group and RT alone group.
<p>Forest plots comparing rates of (A) persistence and recurrence, and (B) distant metastasis, between the CCRT group and RT alone group.</p
Funnel plot indicating no evidence of heterogeneity between trials for distant metastasis rate.
<p>RR values included in the meta-analysis are indicated on the abscissa axis, and the SE (Log OR) values are indicated on the ordinate axis. The impact of publication bias was assessed by observing the symmetry.</p